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Allam O, Maghsoodi M, Jang SS, Snow SD. Unveiling Competitive Adsorption in TiO 2 Photocatalysis through Machine-Learning-Accelerated Molecular Dynamics, DFT, and Experimental Methods. ACS APPLIED MATERIALS & INTERFACES 2024; 16:36215-36223. [PMID: 38953235 PMCID: PMC11261558 DOI: 10.1021/acsami.4c02334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 06/21/2024] [Accepted: 06/24/2024] [Indexed: 07/03/2024]
Abstract
The efficient harnessing of solar power for water treatment via photocatalytic processes has long been constrained by the challenge of understanding and optimizing the interactions at the photocatalyst surface, particularly in the presence of nontarget cosolutes. The adsorption of these cosolutes, such as natural organic matter, onto photocatalysts can inhibit the degradation of pollutants, drastically decreasing the photocatalytic efficiency. In the present work, computational methods are employed to predict the inhibitory action of a suite of small organic molecules during TiO2 photocatalytic degradation of para-chlorobenzoic acid (pCBA). Specifically, tryptophan, coniferyl alcohol, succinic acid, gallic acid, and trimesic acid were selected as interfering agents against pCBA to observe the resulting competitive reaction kinetics via bulk and surface phase reactions according to Langmuir-Hinshelwood adsorption dynamics. Experiments revealed that trimesic and gallic acids were most competitive with pCBA, followed by succinic acid. Density functional theory (DFT) and machine learning interatomic potentials (MLIPs) were used to investigate the molecular basis of these interactions. The computational findings showed that while the type of functional group did not directly predict adsorption affinity, the spatial arrangement and electronic interactions of these groups significantly influenced adsorption dynamics and corresponding inhibitory behavior. Notably, MLIPs, derived by fine-tuning models pretrained on a vastly larger dataset, enabled the exploration of adsorption behaviors over substantially longer periods than typically possible with conventional ab initio molecular dynamics, enhancing the depth of understanding of the dynamic interaction processes. Our study thus provides a pivotal foundation for advancing photocatalytic technology in environmental applications by demonstrating the critical role of molecular-level interactions in shaping photocatalytic outcomes.
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Affiliation(s)
- Omar Allam
- Woodruff
School of Mechanical Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
- Computational
NanoBio Technology Laboratory, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Mostafa Maghsoodi
- Department
of Civil and Environmental Engineering, Louisiana State University, 3255 Patrick Taylor Hall, Baton Rouge, Louisiana 70803, United States
| | - Seung Soon Jang
- Computational
NanoBio Technology Laboratory, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Samuel D. Snow
- Department
of Civil and Environmental Engineering, Louisiana State University, 3255 Patrick Taylor Hall, Baton Rouge, Louisiana 70803, United States
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2
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Ahtasham Iqbal M, Akram S, Khalid S, Lal B, Hassan SU, Ashraf R, Kezembayeva G, Mushtaq M, Chinibayeva N, Hosseini-Bandegharaei A. Advanced photocatalysis as a viable and sustainable wastewater treatment process: A comprehensive review. ENVIRONMENTAL RESEARCH 2024; 253:118947. [PMID: 38744372 DOI: 10.1016/j.envres.2024.118947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 03/14/2024] [Accepted: 04/14/2024] [Indexed: 05/16/2024]
Abstract
In our era, water pollution not only poses a serious threat to human, animal, and biotic life but also causes serious damage to infrastructure and the ecosystem. A set of physical, chemical, and biological technologies have been exploited to decontaminate and/or disinfect water pollutants, toxins, microbes, and contaminants, but none of these could be ranked as sustainable and scalable wastewater technology. The photocatalytic process can harmonize the sunlight to degrade certain toxins, chemicals, microbes, and antibiotics, present in water. For example, transition metal oxides (ZnO, SnO2, TiO2, etc.), when integrated into an organic framework of graphene or nitrides, can bring about more than 90% removal of dyes, microbial load, pesticides, and antibiotics. Similarly, a modified network of graphitic carbon nitride can completely decontaminate petrochemicals. The present review will primarily highlight the mechanistic aspects for the removal and/or degradation of highly concerned contaminants, factors affecting photocatalysis, engineering designs of photoreactors, and pros and cons of various wastewater treatment technologies already in practice. The photocatalytic reactor can be a more viable and sustainable wastewater treatment opportunity. We hope the researcher will find a handful of information regarding the advanced oxidation process accomplished via photocatalysis and the benefits associated with the photocatalytic-type degradation of water pollutants and contaminants.
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Affiliation(s)
| | - Sumia Akram
- Division of Science and Technology, University of Education Lahore, Pakistan
| | - Shahreen Khalid
- Department of Chemistry, Government College University Lahore, Pakistan
| | - Basant Lal
- Department of Chemistry, Institute of Applied Science and Humanities, GLA University, Mathura, 281406, India
| | - Sohaib Ul Hassan
- Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan
| | - Rizwan Ashraf
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Gulmira Kezembayeva
- Mining and Metallurgical Institute Named After O.A. Baikonurov, Department Chemical Processes and Industrial Ecology, Satbayev University, Almaty, Kazakhstan
| | - Muhammad Mushtaq
- Department of Chemistry, Government College University Lahore, Pakistan.
| | | | - Ahmad Hosseini-Bandegharaei
- Faculty of Chemistry, Semnan University, Semnan, Iran; Centre of Research Impact and Outcome, Chitkara University, Rajpura-140417, Punjab, India; Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Chennai-602105, Tamil Nadu, India.
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3
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Huang Y, Shen M, Yan H, He Y, Xu J, Zhu F, Yang X, Ye YX, Ouyang G. Achieving a solar-to-chemical efficiency of 3.6% in ambient conditions by inhibiting interlayer charges transport. Nat Commun 2024; 15:5406. [PMID: 38926358 PMCID: PMC11208529 DOI: 10.1038/s41467-024-49373-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 06/04/2024] [Indexed: 06/28/2024] Open
Abstract
Efficiently converting solar energy into chemical energy remains a formidable challenge in artificial photosynthetic systems. To date, rarely has an artificial photosynthetic system operating in the open air surpassed the highest solar-to-biomass conversion efficiency (1%) observed in plants. In this study, we present a three-dimension polymeric photocatalyst achieving a solar-to-H2O2 conversion efficiency of 3.6% under ambient conditions, including real water, open air, and room temperature. The impressive performance is attributed to the efficient storage of electrons inside materials via expeditious intramolecular charge transfer, and the fast extraction of the stored electrons by O2 that can diffuse into the internal pores of the self-supporting three-dimensional material. This construction strategy suppresses the interlayer transfer of excitons, polarizers and carriers, effectively increases the utilization of internal excitons to 82%. This breakthrough provides a perspective to substantially enhance photocatalytic performance and bear substantial implications for sustainable energy generation and environmental remediation.
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Affiliation(s)
- Yuyan Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, LIFM, School of Chemistry, IGCME, Sun Yat-sen University, Guangzhou, 510275, China
| | - Minhui Shen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, LIFM, School of Chemistry, IGCME, Sun Yat-sen University, Guangzhou, 510275, China
| | - Huijie Yan
- School of Chemical Engineering and Technology, IGCME, Sun Yat-sen University, Zhuhai, 519082, China
| | - Yingge He
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, China
| | - Jianqiao Xu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, LIFM, School of Chemistry, IGCME, Sun Yat-sen University, Guangzhou, 510275, China
| | - Fang Zhu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, LIFM, School of Chemistry, IGCME, Sun Yat-sen University, Guangzhou, 510275, China
| | - Xin Yang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yu-Xin Ye
- School of Chemical Engineering and Technology, IGCME, Sun Yat-sen University, Zhuhai, 519082, China.
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong, 519082, China.
| | - Gangfeng Ouyang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, LIFM, School of Chemistry, IGCME, Sun Yat-sen University, Guangzhou, 510275, China.
- School of Chemical Engineering and Technology, IGCME, Sun Yat-sen University, Zhuhai, 519082, China.
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong, 519082, China.
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4
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Teng Z, Yang H, Zhang Q, Cai W, Lu YR, Kato K, Zhang Z, Ding J, Sun H, Liu S, Wang C, Chen P, Yamakata A, Chan TS, Su C, Ohno T, Liu B. Atomically dispersed low-valent Au boosts photocatalytic hydroxyl radical production. Nat Chem 2024:10.1038/s41557-024-01553-6. [PMID: 38918581 DOI: 10.1038/s41557-024-01553-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 05/03/2024] [Indexed: 06/27/2024]
Abstract
Providing affordable, safe drinking water and universal sanitation poses a grand societal challenge. Here we developed atomically dispersed Au on potassium-incorporated polymeric carbon nitride material that could simultaneously boost photocatalytic generation of ·OH and H2O2 with an apparent quantum efficiency over 85% at 420 nm. Potassium introduction into the poly(heptazine imide) matrix formed strong K-N bonds and rendered Au with an oxidation number close to 0. Extensive experimental characterization and computational simulations revealed that the low-valent Au altered the materials' band structure to trap highly localized holes produced under photoexcitation. These highly localized holes could boost the 1e- water oxidation reaction to form highly oxidative ·OH and simultaneously dissociate the hydrogen atom in H2O, which greatly promoted the reduction of oxygen to H2O2. The photogenerated ·OH led to an efficiency enhancement for visible-light-response superhydrophilicity. Furthermore, photo-illumination in an onsite fixed-bed reactor could disinfect water at a rate of 66 L H2O m-2 per day.
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Affiliation(s)
- Zhenyuan Teng
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Hongbin Yang
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Qitao Zhang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China
| | - Wenan Cai
- Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu-shi, Japan
| | - Ying-Rui Lu
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan
| | - Kosaku Kato
- Department of Chemistry, Okayama University, Okayama-shi, Japan
| | - Zhenzong Zhang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
| | - Jie Ding
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Han Sun
- The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Sixiao Liu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
| | - Chengyin Wang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
| | - Peng Chen
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
| | - Akira Yamakata
- Department of Chemistry, Okayama University, Okayama-shi, Japan
| | - Ting-Shan Chan
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan
| | - Chenliang Su
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China.
| | - Teruhisa Ohno
- Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu-shi, Japan.
| | - Bin Liu
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China.
- Department of Chemistry, Hong Kong Institute of Clean Energy and Center of Super-Diamond and Advanced Films, City University of Hong Kong, Hong Kong SAR, China.
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5
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Song Y, Shang C, Westerhoff P, Ling L. Protecting against micropollutants in water storage tanks using in-situ TiO 2 coated quartz optical fibers. WATER RESEARCH 2024; 257:121682. [PMID: 38718654 DOI: 10.1016/j.watres.2024.121682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 02/28/2024] [Accepted: 04/27/2024] [Indexed: 05/29/2024]
Abstract
Photocatalyst-coated optical fibers (P-OFs) using UV-A LEDs offer a highly promising solution for the degradation of micropollutants within municipal, reuse, industrial or home distribution systems, by integrating P-OFs into water storage tanks. P-OFs have photocatalysts attached to bundles of optical fibers, enabling their direct deployment within tanks. This eliminates the necessity for photocatalyst slurries, which would require additional membrane or separation systems. However, a current limitation of P-OFs is light management, specifically light oversaturation of the coated photocatalysts and short light transmission distances along fibers. This study overcomes this limitation and reveals strategies to improve the light dissipation uniformity along P-OFs, and demonstrates the performance of P-OFs on degrading a model micropollutant, carbamazepine (CBZ). Key tunable variables of fibers and light emission conditions, including photocatalyst coating patchiness (p), minimum light incident angles (θm), radiant flux launched to fibers (Φi), and fiber diameters (D), were modeled to establish their relationships with the light dissipation uniformity in TiO2-coated quartz optical fibers (TiO2-QOFs). We then validated modeling insights by conducting experiments to examine how these variables influence the generation of evanescent waves which are localized energy on fiber surfaces, leading to either photocatalyst activation or the recapture of unused light back into fibers. We observed substantial enhancements in evanescent waves generation by decreasing p and increasing θm, resulting in uniform light dissipation which reduces light oversaturation and improves light transmission distances. Moreover, these optimizations led to a remarkable three-fold improvement in CBZ degradation rates and a 65% reduction in energy consumption. Such improvement substantially reduces the capital and operational cost and enhances practicality of energy-efficient photocatalysis without additional chemical oxidants for micropollutant degradation in water storage tanks.
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Affiliation(s)
- Yinghao Song
- Department of Civil and Environmental Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR
| | - Chii Shang
- Department of Civil and Environmental Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR; Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR.
| | - Paul Westerhoff
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and The Built Environment, Arizona State University, Tempe, AZ, 85287 United States
| | - Li Ling
- Department of Civil and Environmental Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR; Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai, 519087, China.
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6
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Sahoo S, Mahamallik P, Das R, Panigrahi S. A critical review on non-metal doped g-C 3N 4 based photocatalyst for organic pollutant remediation with sustainability assessment by life cycle analysis. ENVIRONMENTAL RESEARCH 2024; 258:119390. [PMID: 38879105 DOI: 10.1016/j.envres.2024.119390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/14/2024] [Accepted: 06/07/2024] [Indexed: 06/22/2024]
Abstract
Photocatalysis is recognized to be one of the most promising ways to address energy and environmental issues by utilizing visible light. Graphitic carbon nitride (g-C3N4), with a moderate band gap (∼2.7 eV) has been the flashpoint in environmental photocatalysis as it can work better under visible light, can be synthesized by a facile synthesis process using low-cost materials, thermally and chemically stable. Still the photocatalytic performance of g-C3N4 is not satisfactory because of certain limitations such as insufficient visible light absorption capacity, low electron-hole separation efficiency, high recombination rate, poor surface area. Introduction of doping, band structure engineering, defecting and designing of heterojunction, composites etc. were investigated to amplify its applications. Among all these modifications, elemental doping is a suitable and successful alternative for the enhancement of the photocatalytic activity by changing the optical and electronic properties. This review emphasizes on advancement and trends of elemental doping and its application on photocatalytic organic pollutant remediation in aqueous medium. The fundamental photocatalytic activity of heterogeneous photocatalysis and specifically g-C3N4-based photocatalysis have been discussed. The benfits of non-metal doping, enhanced photocatalytic performance by doping element, mechanism invloved in doping, advantages of co-doping has been explained. Mono, bi, and tri non-metal doped g-C3N4 and their application for the removal of organic pollutants from water medium by visible light photocatalysis has been summerized. Life cycle assessment (LCA) of photocatalytic system has been highlighted. Future research should focus on the large-scale application of the photocatalysis process considering the economic aspects. A rigorous life cycle assessment for deploying the non-metal doped g-C3N4-based photocatalysis technology for successful commercial application is recommended.
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Affiliation(s)
- Subhalaxmi Sahoo
- Water and Wastewater Research Laboratory, Department of Civil Engineering, National Institute of Technology (NIT), Rourkela, 769008, Odisha, India
| | - Prateeksha Mahamallik
- Water and Wastewater Research Laboratory, Department of Civil Engineering, National Institute of Technology (NIT), Rourkela, 769008, Odisha, India.
| | - Rahul Das
- Department of Civil Engineering, National Institute of Technology (NIT), 799046, Agartala, India
| | - Sagarika Panigrahi
- Department of Civil Engineering, National Institute of Technology (NIT), 799046, Agartala, India
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7
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Javed MF, Shahab MZ, Asif U, Najeh T, Aslam F, Ali M, Khan I. Evaluation of machine learning models for predicting TiO 2 photocatalytic degradation of air contaminants. Sci Rep 2024; 14:13688. [PMID: 38871797 PMCID: PMC11176179 DOI: 10.1038/s41598-024-64486-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 06/10/2024] [Indexed: 06/15/2024] Open
Abstract
The escalation of global urbanization and industrial expansion has resulted in an increase in the emission of harmful substances into the atmosphere. Evaluating the effectiveness of titanium dioxide (TiO2) in photocatalytic degradation through traditional methods is resource-intensive and complex due to the detailed photocatalyst structures and the wide range of contaminants. Therefore in this study, recent advancements in machine learning (ML) are used to offer data-driven approach using thirteen machine learning techniques namely XG Boost (XGB), decision tree (DT), lasso Regression (LR2), support vector regression (SVR), adaBoost (AB), voting Regressor (VR), CatBoost (CB), K-Nearest Neighbors (KNN), gradient boost (GB), random Forest (RF), artificial neural network (ANN), ridge regression (RR), linear regression (LR1) to address the problem of estimation of TiO2 photocatalytic degradation rate of air contaminants. The models are developed using literature data and different methodical tools are used to evaluate the developed ML models. XGB, DT and LR2 models have high R2 values of 0.93, 0.926 and 0.926 in training and 0.936, 0.924 and 0.924 in test phase. While ANN, RR and LR models have lowest R2 values of 0.70, 0.56 and 0.40 in training and 0.62, 0.63 and 0.31 in test phase respectively. XGB, DT and LR2 have low MAE and RMSE values of 0.450 min-1/cm2, 0.494 min-1/cm2 and 0.49 min-1/cm2 for RMSE and 0.263 min-1/cm2, 0.285 min-1/cm2 and 0.29 min-1/cm2 for MAE in test stage. XGB, DT, and LR2 have 93% percent errors within 20% error range in training phase. XGB has 92% and DT, and LR2 have 94% errors with 20% range in test phase. XGB, DT, LR2 models remained the highest performing models and XGB is the most robust and effective in predictions. Feature importances reveal the role of input parameters in prediction made by developed ML models. Dosage, humidity, UV light intensity remain important experimental factors. This study will impact positively in providing efficient models to estimate photocatalytic degradation rate of air contaminants using TiO2.
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Affiliation(s)
- Muhammad Faisal Javed
- Department of Civil Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi, Pakistan.
- Western Caspian University, Baku, Azerbaijan.
| | | | - Usama Asif
- Department of Civil Engineering, Nazarbayev University, Astana, Kazakhstan
| | - Taoufik Najeh
- Operation and Maintenance, Operation, Maintenance and Acoustics, Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology, Luleå, Sweden.
| | - Fahid Aslam
- Department of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam Bin Abdulaziz University, 11942, Al-Kharj, Saudi Arabia
| | - Mujahid Ali
- Department of Transport Systems, Traffic Engineering and Logistics, Faculty of Transport and Aviation Engineering, Silesian University of Technology, Krasińskiego 8 Street, 40-019, Katowice, Poland
| | - Inamullah Khan
- National Institute of Transportation, National University of Sciences and Technology (NUST), Islamabad, Pakistan
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8
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Yu W, Chamkouri H, Chen L. Recent advancement on quantum dot-coupled heterojunction structures in catalysis:A review. CHEMOSPHERE 2024; 357:141944. [PMID: 38614402 DOI: 10.1016/j.chemosphere.2024.141944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/20/2024] [Accepted: 04/06/2024] [Indexed: 04/15/2024]
Abstract
Photoelectrocatalysis stands as an exceptionally efficient and sustainable method, significantly addressing both energy scarcity and environmental pollution challenges. Within this realm, quantum dots (QDs) have garnered immense attention for their outstanding catalytic properties. Their unique features-cost-effectiveness, high efficiency, remarkable stability, and exceptional photovoltaic characteristics-set them apart from other tunable semiconductor materials. Heterojunction structures based on quantum dots remarkably boost solar energy conversion efficiency. This review aims to provide a comprehensive overview of the impacts generated by heterojunctions formed using diverse quantum dots and delve into their catalytic applications. Moreover, it sheds light on recent advancements utilizing quantum dots in modifying optoelectronic semiconductor materials for diverse purposes, ranging from hydrogen (H2) generation to carbon and nitrogen reduction, as well as pollutant degradation. Additionally, the paper offers valuable insights into challenges faced by quantum dot applications and outlines promising future prospects.
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Affiliation(s)
- Wenkai Yu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Hossein Chamkouri
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Lei Chen
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; Intelligent Manufacturing Institute of HFUT, Hefei, 230051, China.
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9
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Zhu L, Zhou S, Cheng H, Komarneni S, Ma J. In-situ growth of Mn-Ni 3S 2 on nickel foam for catalytic ozonation of p-nitrophenol. CHEMOSPHERE 2024; 357:142037. [PMID: 38626811 DOI: 10.1016/j.chemosphere.2024.142037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 03/31/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024]
Abstract
In this study, a new catalyst for catalytic ozonation was obtained by in-situ growth of Mn-Ni3S2 nanosheets on the surface of nickel foam (NF). The full degradation of p-nitrophenol (PNP) was accomplished under optimal conditions in 40 min. The effects of material dosage, ozone dosage, pH and the presence of inorganic anions on the degradation efficiency of PNP were investigated. ESR analysis showed that singlet oxygen (1O2) and superoxide radical (O2•-) are the main contributors of PNP degradation. This study offers a new combination of supported catalysts with high efficiency and easy recovery, which provides a new idea for wastewater treatment.
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Affiliation(s)
- Linjie Zhu
- School of Environmental Science and Engineering, Changzhou University, Jiangsu, 213164, China
| | - Siyi Zhou
- School of Environmental Science and Engineering, Changzhou University, Jiangsu, 213164, China
| | - Hao Cheng
- Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Guangxi, 545006, China
| | - Sridhar Komarneni
- Department of Ecosystem Science and Management and Materials Research Institute, 204 Materials Research Laboratory, The Pennsylvania State University, University Park, PA, 16802, USA.
| | - Jianfeng Ma
- School of Environmental Science and Engineering, Changzhou University, Jiangsu, 213164, China.
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10
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Sáenz C, Hernández B, Sanz-Carrillo D, Pellejero I, Gandía LM. High power illumination system for uniform, isotropic and real time controlled irradiance in photoactivated processes research. Heliyon 2024; 10:e31309. [PMID: 38831820 PMCID: PMC11145495 DOI: 10.1016/j.heliyon.2024.e31309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 05/14/2024] [Accepted: 05/14/2024] [Indexed: 06/05/2024] Open
Abstract
In the study of photocatalytic and photoactivated processes and devices a tight control on the illumination conditions is mandatory. The practical challenges in the determination of the necessary photonic quantities pose serious difficulties in the characterization of catalytic performance and reactor designs and configurations, compromising an effective comparison between different experiments. To overcome these limitations, we have designed and constructed a new illumination system based in the concept of the integrating sphere (IS). The system provides uniform and isotropic illumination on the sample, either in batch or continuous flow modes, being these characteristics independent of the sample geometry. It allows direct, non-contact and real time determination of the photonic quantities as well as versatile control on the irradiance values and its spectral characteristics. It can be also scaled up to admit samples of different sizes without affecting its operational behaviour. The performance of the IS system has been determined in comparison with a second illumination system, mounted on an optical bench, that provides quasi-parallel beam (QPB) nearly uniform illumination in tightly controlled conditions. System performance is studied using three sample geometries: a standard quartz cuvette, a thin straight tube and a microreactor by means of potassium ferrioxalate actinometry. Results indicate that the illumination geometry and the angular distribution of the incoming light greatly affect the absorption at the sample. The sample light absorption efficiency can be obtained with statistical uncertainties of about 3% and in very good agreement with theoretical estimations.
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Affiliation(s)
- Carlos Sáenz
- Department of Science, Public University of Navarre, Campus Arrosadía, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT), Public University of Navarre, Campus Arrosadía, 31006 Pamplona, Spain
| | - Begoña Hernández
- Department of Science, Public University of Navarre, Campus Arrosadía, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT), Public University of Navarre, Campus Arrosadía, 31006 Pamplona, Spain
| | - Diego Sanz-Carrillo
- Institute for Advanced Materials and Mathematics (INAMAT), Public University of Navarre, Campus Arrosadía, 31006 Pamplona, Spain
| | - Ismael Pellejero
- Institute for Advanced Materials and Mathematics (INAMAT), Public University of Navarre, Campus Arrosadía, 31006 Pamplona, Spain
| | - Luis M. Gandía
- Department of Science, Public University of Navarre, Campus Arrosadía, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT), Public University of Navarre, Campus Arrosadía, 31006 Pamplona, Spain
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11
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Kong X, Ma J, Garg S, Waite TD. Tailored Metal-Organic Frameworks for Water Purification: Perfluorinated Fe-MOFs for Enhanced Heterogeneous Catalytic Ozonation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:8988-8999. [PMID: 38725314 DOI: 10.1021/acs.est.4c01133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
An industrially viable catalyst for heterogeneous catalytic ozonation (HCO) in water purification requires the characteristics of good dispersion of active species on its surface, efficient electron transfer for ozone decay, and maximum active species utilization. While metal-organic frameworks (MOFs) represent an attractive platform for HCO, the metal nodes in the unmodified MOFs exhibit low catalytic activity. Herein, we present a perfluorinated Fe-MOF catalyst by substituting H atoms on the metalated ligands with F atoms (termed 4F-MIL-88B) to induce structure evolution. The Lewis acidity of 4F-MIL-88B was enhanced via the formation of Fe nodes, tailoring the electron distribution on the catalyst surface. As a result of catalyst modification, the rate constant for degradation of the target compounds examined increased by ∼700% compared with that observed for the unmodified catalyst. Experimental evidence and theoretical calculations showed that the modulated polarity and the enhanced electron transfer between the catalyst and ozone molecules contributed to the adsorption and transformation of O3 to •OH on the catalyst surface. Overall, the results of this study highlight the significance of tailoring the metalated ligands to develop highly efficient and stable MOF catalysts for HCO and provide an in-depth mechanistic understanding of their structure-function evolution, which is expected to facilitate the applications of nanomaterial-based processes in water purification.
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Affiliation(s)
- Xiangtong Kong
- Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Jinxing Ma
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Shikha Garg
- Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - T David Waite
- Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
- UNSW Centre for Transformational Environmental Technologies (CTET), Yixing, Jiangsu Province 214206, P.R. China
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12
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Rajan ST, Senthilnathan J, Arockiarajan A. Innovative enhancement of electron tunneling synergy in carbon-doped Ta 2O 5CuO photocatalyst with nematic liquid crystal for safe drinking water. WATER RESEARCH 2024; 255:121457. [PMID: 38555783 DOI: 10.1016/j.watres.2024.121457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/02/2024] [Accepted: 03/11/2024] [Indexed: 04/02/2024]
Abstract
This study focuses on enhancing the photocatalytic properties of carbon-doped Ta2O5CuO (C-Ta2O5CuO) nanocomposites for drinking water purification. The nanocomposites were fabricated by depositing C-Ta2O5CuO onto Nematic Liquid Crystal Polaroid (NLCP) obtained from a discarded laptop monitor, employing the sputter deposition method. The X-ray diffraction (XRD) and High-resolution transmission electron microscopy (HRTEM) determined the nanocomposite thin films' crystallinity and structural properties. The EDX and XPS analyses confirmed the elemental composition and reality of the Cu-incorporated Ta2O5 nanocomposites, respectively. The combination of electron tunneling enhancement provided by the NLCP and graphitic carbon led to exceptional photocatalytic performance. This was particularly evident in the efficient degradation of P-Rosaniline Hydrochloride (PRH) dye in an aqueous medium. C-Ta2O5CuO catalytic activities were estimated at various dye concentrations, repeatability, reusability with time, and kinetics. Coating's stability and long-term activity in photocatalysis reactions were also tested. Additionally, Cu present in the C-Ta2O5CuO and ˙OH radicals exhibited remarkable bactericidal activity. They displayed significant antibacterial efficacy against both gram-positive Escherichia coli (E. coli) and gram-negative Staphylococcus aureus (S. aureus) bacteria. These findings have significant implications for the development of advanced materials with potent photocatalytic and antibacterial properties, holding promise for improving drinking water quality and addressing environmental and health challenges.
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Affiliation(s)
- S Thanka Rajan
- Department of Materials Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
| | - J Senthilnathan
- Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600036, India.
| | - A Arockiarajan
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai 600 036, India; Ceramic Technology Group- Center of Excellence in Materials and Manufacturing Futuristic Mobility, Indian Institute of Technology Madras, Chennai 600 036, India.
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13
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Hübner U, Spahr S, Lutze H, Wieland A, Rüting S, Gernjak W, Wenk J. Advanced oxidation processes for water and wastewater treatment - Guidance for systematic future research. Heliyon 2024; 10:e30402. [PMID: 38726145 PMCID: PMC11079112 DOI: 10.1016/j.heliyon.2024.e30402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/23/2024] [Accepted: 04/25/2024] [Indexed: 05/12/2024] Open
Abstract
Advanced oxidation processes (AOPs) are a growing research field with a large variety of different process variants and materials being tested at laboratory scale. However, despite extensive research in recent years and decades, many variants have not been transitioned to pilot- and full-scale operation. One major concern are the inconsistent experimental approaches applied across different studies that impede identification, comparison, and upscaling of the most promising AOPs. The aim of this tutorial review is to streamline future studies on the development of new solutions and materials for advanced oxidation by providing guidance for comparable and scalable oxidation experiments. We discuss recent developments in catalytic, ozone-based, radiation-driven, and other AOPs, and outline future perspectives and research needs. Since standardized experimental procedures are not available for most AOPs, we propose basic rules and key parameters for lab-scale evaluation of new AOPs including selection of suitable probe compounds and scavengers for the measurement of (major) reactive species. A two-phase approach to assess new AOP concepts is proposed, consisting of (i) basic research and proof-of-concept (technology readiness levels (TRL) 1-3), followed by (ii) process development in the intended water matrix including a cost comparison with an established process, applying comparable and scalable parameters such as UV fluence or ozone consumption (TRL 3-5). Subsequent demonstration of the new process (TRL 6-7) is briefly discussed, too. Finally, we highlight important research tools for a thorough mechanistic process evaluation and risk assessment including screening for transformation products that should be based on chemical logic and combined with complementary tools (mass balance, chemical calculations).
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Affiliation(s)
- Uwe Hübner
- Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, 85748, Garching, Germany
- Xylem Services GmbH, Boschstraße 4-14, 32051, Herford, Germany
| | - Stephanie Spahr
- Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301, 12587, Berlin, Germany
| | - Holger Lutze
- Department of Civil and Environmental Engineering, Institute IWAR, Chair of Environmental Analytics and Pollutants, Technical University of Darmstadt, Franziska-Braun-Straße 7, 64287, Darmstadt, Germany
- IWW Water Centre, Moritzstraße 26, 45476, Mülheim an der Ruhr, Germany
- Centre for Water and Environmental Research (ZWU), Universitätsstraße 5, 45141, Essen, Germany
| | - Arne Wieland
- Xylem Services GmbH, Boschstraße 4-14, 32051, Herford, Germany
| | - Steffen Rüting
- Xylem Services GmbH, Boschstraße 4-14, 32051, Herford, Germany
| | - Wolfgang Gernjak
- Catalan Institute for Water Research (ICRA), 17003, Girona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), 08010, Barcelona, Spain
| | - Jannis Wenk
- University of Bath, Department of Chemical Engineering and Water Innovation & Research Centre (WIRC@Bath), Bath, BA2 7AY, United Kingdom
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14
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Mathew RA, Mowla M, Shakiba S, Berté TB, Louie SM. Prediction of Nanoparticle Photoreactivity in Mixtures of Surface Foulants Requires Kinetic (Non-equilibrium) Adsorption Considerations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:8542-8553. [PMID: 38682869 DOI: 10.1021/acs.est.3c09677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
The adsorption of foulants on photocatalytic nanoparticles can suppress their reactivity in water treatment applications by scavenging reactive species at the photocatalyst surface, screening light, or competing for surface sites. These inhibitory effects are commonly modeled using the Langmuir-Hinshelwood model, assuming that adsorbed layer compositions follow Langmuirian (equilibrium) competitive adsorption. However, this assumption has not been evaluated in complex mixtures of foulants. This study evaluates the photoreactivity of titanium dioxide (TiO2) nanoparticles toward a target compound, phenol, in the presence of two classes of foulants ─ natural organic matter (NOM) and a protein, bovine serum albumin (BSA) ─ and mixtures of the two. Langmuir adsorption models predict that BSA should strongly influence the nanoparticle photoreactivity because of its higher adsorption affinity relative to phenol and NOM. However, model evaluation of the experimental phenol decay rates suggested that neither the phenol nor foulant surface coverages are governed by Langmuirian competitive adsorption. Rather, a reactivity model incorporating kinetic predictions of adsorbed layer compositions (favoring NOM adsorption) outperformed Langmuirian models in providing accurate, unbiased predictions of phenol degradation rates. This research emphasizes the importance of using first-principles models that account for adsorption kinetics when assumptions of equilibrium adsorption do not apply.
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Affiliation(s)
- Riya A Mathew
- Department of Civil & Environmental Engineering, University of Houston, Houston, Texas 77004, United States
| | - Marfua Mowla
- Department of Civil & Environmental Engineering, University of Houston, Houston, Texas 77004, United States
| | - Sheyda Shakiba
- Department of Civil & Environmental Engineering, University of Houston, Houston, Texas 77004, United States
| | - Tchemongo B Berté
- Department of Civil & Environmental Engineering, University of Houston, Houston, Texas 77004, United States
| | - Stacey M Louie
- Department of Civil & Environmental Engineering, University of Houston, Houston, Texas 77004, United States
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15
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Tan KH, Shih YH, Chen WL. Facile preparation of environmental benign LED white light active humic acid nanolayer coated titanium dioxide photocatalyst for bisphenol A degradation. CHEMOSPHERE 2024; 355:141710. [PMID: 38493998 DOI: 10.1016/j.chemosphere.2024.141710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 03/19/2024]
Abstract
Natural organic matter is a mixture of microbial decomposition products widely found in surface and groundwater. These organic materials have great potential as carbon-based precursors for chemical synthesis. This work demonstrated the development of a green photocatalyst via a facile adsorption process that combined colloidal titanium dioxide (TiO2) with humic acid. The resulting photocatalyst was visible light active and able to completely degrade 5 mg/L of BPA within 6 h under the irradiation of energy-efficient LED white light. The first-order kinetic rate constant of the reaction was determined to be 1.7 × 10-2 min-1. The enhanced photocatalytic activity was attributed to the decreased band gap energy and effective charge separation that limits the photogenerated electron-hole recombination. The outcome of this research opened an opportunity for the development of sustainable functional materials using natural organic matter.
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Affiliation(s)
- Kok-Hou Tan
- Department of Agricultural Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Yang-Hsin Shih
- Department of Agricultural Chemistry, National Taiwan University, Taipei, 106, Taiwan.
| | - Wen-Ling Chen
- Department of Agricultural Chemistry, National Taiwan University, Taipei, 106, Taiwan; Institute of Food Safety and Health, College of Public Health, National Taiwan University, 17 Xuzhou Rd., Taipei, 100, Taiwan; Department of Public Health, College of Public Health, National Taiwan University, 17 Xuzhou Rd., Taipei, 100, Taiwan
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16
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Liu LX, Liu C, Li B, Dong YM, Wang XH, Zhang X. Tuning interfacial oxygen vacancy level of bismuth oxybromide to enhance photocatalytic degradation of bisphenol A. CHEMOSPHERE 2024; 356:141911. [PMID: 38583539 DOI: 10.1016/j.chemosphere.2024.141911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/03/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Oxygen vacancies (OVs) have garnered significant interest for their role as active sites, enhancing the catalytic efficiency of various catalysts. Despite their widespread application in environmental purification processes, the generation of OVs conventionally depends on high-temperature conditions and strong reducing agents for the extraction of surface partial oxygen atoms from catalysts. In this work, bismuth oxybromide (BiOBr) nanosheets with varying levels of OVs were synthesized via a simple and effective solvothermal method. This novel method affords precise control over the conduction band (CB) and valence band (VB) positions of BiOBr. The presence of different OVs exhibited varying photocatalytic efficiencies in the degradation of bisphenol A (BPA) under visible light irradiation, with higher levels of OVs resulting in superior photocatalytic performance. Furthermore, radical scavenger experiments demonstrated that superoxide oxides (O2•-) and holes (h+) were the primary reactive oxygen species for BPA degradation. Additionally, BiOBr-OVs exhibited excellent anti-interference and stability in water matrices containing diverse inorganic anions and organic compounds. This work provides a simple and effective approach for the fine-regulating of catalysts through interfacial defect engineering, paving the way for their practical application in environmental decontamination.
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Affiliation(s)
- Le-Xuan Liu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Chang Liu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Bin Li
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Ya-Meng Dong
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Xin-Hui Wang
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Xing Zhang
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China.
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17
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Nelson K, Mecha AC, Kumar A. Characterization of novel solar based nitrogen doped titanium dioxide photocatalytic membrane for wastewater treatment. Heliyon 2024; 10:e29806. [PMID: 38681563 PMCID: PMC11046203 DOI: 10.1016/j.heliyon.2024.e29806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 03/16/2024] [Accepted: 04/15/2024] [Indexed: 05/01/2024] Open
Abstract
The increasing presence of microbial and emerging organic contaminants pose detrimental effects on the environment and ecosystem such as diseases, pandemics and toxicity. Most of these synthetic pollutants are biorecalcitrant and therefore persist in the environment. Conventional water treatment methods are not effective thereby necessitating the development of advanced techniques such as photocatalysis and membrane processes. In this study, visible light-driven photocatalytic membrane was synthesized through the immobilization of nitrogen-doped nanoparticles onto the polyvinylidene fluoride (PVDF) membrane and performance evaluated with E.coli microbial contaminant removal. Characterization was done using Fourier transform infrared spectra, X-ray diffraction (XRD), water contact angle, Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX). The Nitrogen-doping of titanium dioxide red-shifted the light absorption to a visible range of 440 nm from 400 nm. Nitrogen dopant was detected at 1420 cm-1and 1170 cm-1 for nitrogen doped nanoparticles and 1346-1417 cm-1 for nitrogen doped titanium dioxide PVDF membrane. SEM-EDX confirmed presences of nitrogen in nitrogen doped titanium dioxide nanoparticles on membrane surface with nitrogen elemental composition of 0.01 % wt. The water contact angle reduced by 81.39o from 120.14o to 38.75o because of PVA immobilization of nitrogen-doped titanium dioxide and glutaraldehyde crosslinking. Nitrogen doping resulted in visible light active photocatalytic membranes with better hydrophilicity and fouling resistance. 8.42 E.coli log removal and a relative flux of 0.35 was obtained within 75 min. The developed photocatalytic membrane enables the use of sunlight hence a less costly method for decontamination of wastewater.
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Affiliation(s)
- Kipchumba Nelson
- Renewable Energy, Nanomaterials, and Water Research Group, Department of Chemical and Process Engineering, Moi University, P.O. Box 3900, Eldoret, Kenya
| | - Achisa C. Mecha
- Renewable Energy, Nanomaterials, and Water Research Group, Department of Chemical and Process Engineering, Moi University, P.O. Box 3900, Eldoret, Kenya
- Department of Environmental Science, University of Arizona, USA
| | - Anil Kumar
- Department of Chemical and Process Engineering, Moi University, P.O. Box 3900, Eldoret, Kenya
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18
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Lin Y, Chen Z, Feng C, Ma L, Jing J, Hou J, Xu L, Sun M, Chen D. Preparation of S-C 3N 4/AgCdS Z-Scheme Heterojunction Photocatalyst and Its Effectively Improved Photocatalytic Performance. Molecules 2024; 29:1931. [PMID: 38731422 PMCID: PMC11085748 DOI: 10.3390/molecules29091931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 05/13/2024] Open
Abstract
In this study, S-doped graphitic carbon nitride (S-C3N4) was prepared using the high-temperature polymerization method, and then S-C3N4/AgCdS heterojunction photocatalyst was obtained using the chemical deposition method through loading Ag-doped CdS nanoparticles (AgCdS NPs) on the surface of S-C3N4. Experimental results show that the AgCdS NPs were evenly dispersed on the surface of S-C3N4, indicating that a good heterojunction structure was formed. Compared to S-C3N4, CdS, AgCdS and S-C3N4/CdS, the photocatalytic performance of S-C3N4/AgCdS has been significantly improved, and exhibits excellent photocatalytic degradation performance of Rhodamine B and methyl orange. The doping of Ag in collaboration with the construction of a Z-scheme heterojunction system promoted the effective separation and transport of the photogenerated carriers in S-C3N4/AgCdS, significantly accelerated its photocatalytic reaction process, and thus improved its photocatalytic performance.
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Affiliation(s)
- Yuhong Lin
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China; (Y.L.); (J.J.); (D.C.)
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China; (L.M.); (J.H.); (L.X.); (M.S.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
| | - Zhuoyuan Chen
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China; (Y.L.); (J.J.); (D.C.)
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China; (L.M.); (J.H.); (L.X.); (M.S.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
| | - Chang Feng
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China; (Y.L.); (J.J.); (D.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
| | - Li Ma
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China; (L.M.); (J.H.); (L.X.); (M.S.)
| | - Jiangping Jing
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China; (Y.L.); (J.J.); (D.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
| | - Jian Hou
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China; (L.M.); (J.H.); (L.X.); (M.S.)
| | - Likun Xu
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China; (L.M.); (J.H.); (L.X.); (M.S.)
| | - Mingxian Sun
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China; (L.M.); (J.H.); (L.X.); (M.S.)
| | - Dongchu Chen
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China; (Y.L.); (J.J.); (D.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
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19
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Huang Y, Jeffrey P, Pidou M. UV/TiO 2 photocatalysis as post-treatment of anaerobic membrane bioreactor effluent for reuse. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 356:120628. [PMID: 38520856 DOI: 10.1016/j.jenvman.2024.120628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 02/05/2024] [Accepted: 03/10/2024] [Indexed: 03/25/2024]
Abstract
Advanced oxidation processes have been widely applied as a post-treatment solution to remove residual organic compounds in water reuse schemes. However, UV/TiO2 photocatalysis, which provides a sustainable option with no continuous chemical addition, has very rarely been studied to treat anaerobically treated effluents. In the current study, the removal of organics and nutrients from an anaerobic membrane bioreactor (AnMBR) effluent is evaluated during adsorption and photocatalysis processes under various conditions of TiO2 dose and UV intensity and compared to the effluent from an aerobic membrane bioreactor (AeMBR). The sequence for preferential adsorption on TiO2 was found to be phosphorus, inorganic carbon and then ammonia/organic carbon were found. The competing effect between the organics and nutrients, along with the low UV transmission efficiency caused by the need for high doses of TiO2, ultimately compromise the organic removal efficiency in the AnMBR permeate. TiO2 dosage was found to have a greater impact than UV intensity on improving the overall removal performance as nutrients are competing for the adsorption site but are not photodegraded. Under the same operational condition, the UV/TiO2 photocatalysis displayed a higher removal efficiency of organic matter and phosphorus in the AeMBR effluent due to a lower initial organics concentration and absence of ammonia as compared to the AnMBR effluent.
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Affiliation(s)
- Yu Huang
- Cranfield Water Science Institute, Cranfield University, Cranfield, MK430AL, United Kingdom
| | - Paul Jeffrey
- Cranfield Water Science Institute, Cranfield University, Cranfield, MK430AL, United Kingdom
| | - Marc Pidou
- Cranfield Water Science Institute, Cranfield University, Cranfield, MK430AL, United Kingdom.
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20
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Liu J, Lin J, Yi K, Liu F, Gao F, Wang M, Huang F. Solid-waste-recycled CuO/C 3N 4 S-scheme heterojunctions for efficient photocatalytic antibiotic degradation. NANOSCALE 2024. [PMID: 38477326 DOI: 10.1039/d3nr06410g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
With the increasing severity of antibiotic pollution, the development of effective green photocatalysts for the degradation of organic pollutants in water has attracted extensive attention. Herein, we have prepared CuO/C3N4 S-scheme heterogeneous photocatalysts via recycling Cu resources from Cu-containing electroplating sludges. By mediating the acid leaching process, copper in electroplating sludges was dissolved selectively, while other metal species were retained in the residues. The CuO/C3N4 S-scheme heterojunction not only effectively suppressed the recombination of photogenerated charge carriers of C3N4, but also preserved the strong reducing electrons of C3N4 and the strong oxidizing holes of CuO, retaining the outstanding redox ability of CuO/C3N4. Therefore, CuO/C3N4 photocatalysts exhibited good catalytic performance in the degradation of tetracycline (over 95% in 2 h). In addition, CuO/C3N4 S-scheme heterojunctions achieved a high mineralization rate (45% in 2 hours), thus reducing secondary pollution during the degradation. This work provides a reliable direction for designing novel S-scheme heterojunction photocatalytic materials by using metal sources in solid waste.
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Affiliation(s)
- Jiawen Liu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Jiahui Lin
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Kai Yi
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Fangyan Liu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Feng Gao
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Mengye Wang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Feng Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University, Guangzhou, 510275, China.
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, 341000, China
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21
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Su R, Zhu Y, Gao B, Li Q. Progress on mechanism and efficacy of heterogeneous photocatalysis coupled oxidant activation as an advanced oxidation process for water decontamination. WATER RESEARCH 2024; 251:121119. [PMID: 38219690 DOI: 10.1016/j.watres.2024.121119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 12/08/2023] [Accepted: 01/07/2024] [Indexed: 01/16/2024]
Abstract
The rising debate on the dilemma of photocatalytic water treatment technologies has driven researchers to revisit its prospects in water decontamination. Nowadays, heterogeneous photocatalysis coupled oxidant activation techniques are intensively studied due to their dual advantages of high mineralization and high oxidation efficiency in pollutant degradation. This paved a new way for the development of solar-driven oxidation technologies. Previous reviews focused on the advances in one specific coupling technique, such as photocatalytic persulfate activation and photocatalytic ozonation, but lack a consolidated understanding of the synergy between photocatalytic oxidation and oxidant activation. The synergy involves the migration of photogenerated carriers, radical reaction, and the increase in oxidation rate and mineralization. This review systematically summarizes the fundamentals of activation mechanism, advanced characterization techniques and synergistic effects of coupling techniques for water decontamination. Besides, specific cases that lead researchers astray in revealing mechanisms and assessing synergy are critically discussed. Finally, the prospects and challenges are put forward to further deepen the research on heterogeneous photocatalytic activation of oxidants. This work provides a consolidated view of the existing heterogeneous photocatalysis coupled oxidant activation techniques and inspires researchers to develop more promising solar-driven technologies for water decontamination.
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Affiliation(s)
- Ruidian Su
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Yongfa Zhu
- Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Baoyu Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Qian Li
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China.
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22
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Willis D, Sheets EC, Worbington MR, Kamat M, Glass SK, Caso MJ, Ofoegbuna T, Diaz LM, Osei-Appau C, Snow SD, McPeak KM. Efficient Chemical-Free Degradation of Waterborne Micropollutants with an Immobilized Dual-Porous TiO 2 Photocatalyst. ACS ES&T ENGINEERING 2023; 3:1694-1705. [PMID: 37969427 PMCID: PMC10644339 DOI: 10.1021/acsestengg.3c00191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 11/17/2023]
Abstract
Photocatalytic advanced oxidation processes (AOPs) promise a chemical-free route to energy-efficient degradation of waterborne micropollutants if long-standing mass transfer and light management issues can be overcome. Herein, we developed a dual-porous photocatalytic system consisting of a mesoporous (i.e., 2-50 nm pores) TiO2 (P25) photocatalyst supported on macroporous (i.e., >50 nm pores) fused quartz fibers (P25/QF). Our reusable photocatalytic AOP reduces chemical consumption and exhibits excellent energy efficiency, demonstrated by degrading various pharmaceutical compounds (acetaminophen, sulfamethoxazole, and carbamazepine) in natural waters with electrical energy per order (EEO) values of 4.07, 0.96, and 1.35 kWh/m3, respectively. Compared to the conventional H2O2/UVC AOP, our photocatalytic AOP can treat water without chemical additives while reducing energy consumption by over 2800%. We examine these improvements based on mass transport and optical (UVA and UVC) transmittance and demonstrate that the enhancements scale with increasing flow rate.
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Affiliation(s)
- Daniel
E. Willis
- Gordon
and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Ella C. Sheets
- Gordon
and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Mary R. Worbington
- Gordon
and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Madhusudan Kamat
- Department
of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Sarah K. Glass
- Gordon
and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - MaCayla J. Caso
- Gordon
and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Tochukwu Ofoegbuna
- Gordon
and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Liz M. Diaz
- Gordon
and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Caleb Osei-Appau
- Department
of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Samuel D. Snow
- Department
of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Kevin M. McPeak
- Gordon
and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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23
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Hu Y, Yan Z, Du L, Yu Y, Huang W, Shi Q. Mesoporous black TiO 2 hollow shells with controlled cavity size for enhanced visible light photocatalysis. OPTICS EXPRESS 2023; 31:33883-33897. [PMID: 37859158 DOI: 10.1364/oe.503344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 09/18/2023] [Indexed: 10/21/2023]
Abstract
Black TiO2 formed by introducing lattice disorder into pristine TiO2 has a narrowed band gap and suppresses the recombination of charge carriers. This provides a potential strategy for visible light photocatalysis. However, the microstructural design of black TiO2 for a higher optimization of visible light is still in high demand. In this work, we proposed the preparation of black TiO2 hollow shells with controllable cavity diameters using silica spheres as templates for the cavities and the NaBH4 reduction method. The decreased cavity size resulted in a hollow shell with an enhanced visible-light absorption and improved photocatalytic performance. Moreover, we demonstrated that this cavity can be combined with gold nanoparticles (AuNPs) to form AuNPs@black TiO2 yolk-shells. The AuNPs provided additional visible light absorption and promoted the separation of photogenerated carriers in the yolk-shell structures. This further improved the photocatalysis, the degradation rate of Cr(VI) can reach 0.066 min-1. Our work evaluated the effect of the cavity size on the photocatalytic performance of hollow and yolk-shell structures and provided concepts for the further enhancement of visible-light photocatalysis.
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24
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Kazi OA, Chen W, Eatman JG, Gao F, Liu Y, Wang Y, Xia Z, Darling SB. Material Design Strategies for Recovery of Critical Resources from Water. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2300913. [PMID: 37000538 DOI: 10.1002/adma.202300913] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/22/2023] [Indexed: 06/19/2023]
Abstract
Population growth, urbanization, and decarbonization efforts are collectively straining the supply of limited resources that are necessary to produce batteries, electronics, chemicals, fertilizers, and other important products. Securing the supply chains of these critical resources via the development of separation technologies for their recovery represents a major global challenge to ensure stability and security. Surface water, groundwater, and wastewater are emerging as potential new sources to bolster these supply chains. Recently, a variety of material-based technologies have been developed and employed for separations and resource recovery in water. Judicious selection and design of these materials to tune their properties for targeting specific solutes is central to realizing the potential of water as a source for critical resources. Here, the materials that are developed for membranes, sorbents, catalysts, electrodes, and interfacial solar steam generators that demonstrate promise for applications in critical resource recovery are reviewed. In addition, a critical perspective is offered on the grand challenges and key research directions that need to be addressed to improve their practical viability.
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Affiliation(s)
- Omar A Kazi
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
| | - Wen Chen
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
| | - Jamila G Eatman
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
| | - Feng Gao
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Yining Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
| | - Yuqin Wang
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
| | - Zijing Xia
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
| | - Seth B Darling
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
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25
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Patra R, Dash P, Panda PK, Yang PC. A Breakthrough in Photocatalytic Wastewater Treatment: The Incredible Potential of g-C 3N 4/Titanate Perovskite-Based Nanocomposites. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2173. [PMID: 37570490 PMCID: PMC10421126 DOI: 10.3390/nano13152173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 07/14/2023] [Accepted: 07/15/2023] [Indexed: 08/13/2023]
Abstract
Water pollution has emerged as a major global environmental crisis due to the massive contamination of water resources by the textile dyeing industry, organic waste, and agricultural residue. Since water is fundamental to life, this grave disregard puts lives at risk, making the protection of water resources a serious issue today. Recent research has shown great interest in improving the photocatalytic performance of graphitic carbon nitride (g-C3N4) for wastewater treatment. However, the photocatalytic removal activity of pure g-C3N4 is poor, owing to its minimal surface area, fast recombination of photo-generated electron-hole pairs, and poor light absorption. Recently, titanate perovskites (TNPs) have attracted significant attention in both environmental remediation and energy conversion due to their exceptional structural, optical, physiochemical, electrical, and thermal properties. Accordingly, TNPs can initiate a variety of surface catalytic reactions and are regarded as an emerging category of photocatalysts for sustainability and energy-related industries when exposed to illumination. Therefore, in this review article, we critically discuss the recent developments of extensively developed g-C3N4/TNPs that demonstrate photocatalytic applications for wastewater treatment. The different synthetic approaches and the chemical composition of g-C3N4/TNP composites are presented. Additionally, this review highlights the global research trends related to these materials. Furthermore, this review provides insight into the various photocatalytic mechanisms, including their potential impact and significance. Also, the challenges faced by such materials and their future scope are discussed.
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Affiliation(s)
- Rashmiranjan Patra
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan;
| | - Pranjyan Dash
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei 10608, Taiwan;
| | - Pradeep Kumar Panda
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan;
| | - Po-Chih Yang
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan;
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26
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Semalti P, Sharma V, Devi M, Prathap P, Upadhyay NK, Sharma SN. Surface engineering of colloidal quaternary chalcogenide Cu 2ZnSnS 4 nanocrystals: a potential low-cost photocatalyst for water remediation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:79774-79788. [PMID: 36997778 DOI: 10.1007/s11356-023-26603-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 03/18/2023] [Indexed: 06/19/2023]
Abstract
Colloidal route synthesis of quaternary compound CZTS (Cu2ZnSnS4) has been anticipated with an inimitable combination of coordinating ligands and solvents using the hot injection technique. CZTS is recognized as one of the worthiest materials for photo-voltaic/catalytic applications due to its exclusive properties (viz., non-toxic, economical, direct bandgap, high absorbance coefficient, etc.). This paper demonstrates the formation of crystalline, single-phased, monodispersed, and electrically passivated CZTS nanoparticles using a distinctive combination of ligands viz. oleic acid (OA)-trioctylphosphine (TOP) and butylamine (BA)-trioctylphosphine (TOP). Detailed optical, structural, and electrochemical studies were done for all CZTS nanoparticles, and the most efficient composition was found using ligands butylamine and TOP. CZTS nanocrystals were rendered hydrophilic via surface-ligand engineering, which was used for photocatalysis studies of organic pollutants. Malachite green (MG) and rhodamine 6G (Rh) for water remediation have great commercial prospects. The unique selling proposition of this work is the rapid synthesis time (~ 45 min) of colloidal CZTS nanocrystals, cost-effective ligand-exchange process, and negligible material wastage (~ 200 µl per 10 ml of pollutant) during photocatalytic experiments.
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Affiliation(s)
- Pooja Semalti
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi, 110012, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Vikash Sharma
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi, 110012, India
| | - Meenakshi Devi
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi, 110012, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Pathi Prathap
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi, 110012, India
| | | | - Shailesh Narain Sharma
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi, 110012, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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27
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Nkwoada AU, Onyedika G, Oguzie E, Ogwuegbu M. Development of PSA@PS-TiO 2 nanocomposite photocatalyst: structure, mechanism, and application using response surface designs and molecular modeling. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 87:2701-2726. [PMID: 37318919 PMCID: wst_2023_148 DOI: 10.2166/wst.2023.148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Using periwinkle shell ash (PSA) and polystyrene (PS), a new-fangled PSA@PS-TiO2 photocatalyst was fabricated. The morphological images of all the samples studied using a high-resolution transmission electron microscope (HR-TEM) showed a size distribution of 50-200 nm for all samples. The SEM-EDX showed that the membrane substrate of PS was well dispersed, confirming the presence of anatase/rutile phases of TiO2, and Ti and O2 were the major composites. Given the very rough surface morphology (atomic force microscopy (AFM)) due to PSA, the main crystal phases (XRD) of TiO2 (rutile and anatase), low bandgap (UVDRS), and beneficial functional groups (FTIR-ATR), the 2.5 wt.% of PSA@PS-TiO2 exhibited better photocatalytic efficiency for methyl orange degradation. The photocatalyst, pH, and initial concentration were investigated and the PSA@PS-TiO2 was reused for five cycles with the same efficiency. Regression modeling predicted 98% efficiency and computational modeling showed a nucleophilic initial attack initiated by a nitro group. Therefore, PSA@PS-TiO2 nanocomposite is an industrially promising photocatalyst for treating azo dyes, particularly, methyl orange from an aqueous solution.
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Affiliation(s)
- Amarachi Udoka Nkwoada
- Department of Chemistry, School of Physical Sciences, Federal University of Technology Owerri, P.M.B. 1526 Owerri, Nigeria E-mail:
| | - Gerald Onyedika
- Department of Chemistry, School of Physical Sciences, Federal University of Technology Owerri, P.M.B. 1526 Owerri, Nigeria E-mail:
| | - Emeka Oguzie
- Department of Chemistry, School of Physical Sciences, Federal University of Technology Owerri, P.M.B. 1526 Owerri, Nigeria E-mail: ; Africa Centre of Excellence in Future Energies and Electrochemical Systems (ACE-FUELS), Federal University of Technology Owerri, P.M.B. 1526 Owerri, Imo State, Nigeria
| | - Martin Ogwuegbu
- Department of Chemistry, School of Physical Sciences, Federal University of Technology Owerri, P.M.B. 1526 Owerri, Nigeria E-mail:
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28
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Pascariu P, Gherasim C, Airinei A. Metal Oxide Nanostructures (MONs) as Photocatalysts for Ciprofloxacin Degradation. Int J Mol Sci 2023; 24:ijms24119564. [PMID: 37298517 DOI: 10.3390/ijms24119564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/24/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
In recent years, organic pollutants have become a global problem due to their negative impact on human health and the environment. Photocatalysis is one of the most promising methods for the removal of organic pollutants from wastewater, and oxide semiconductor materials have proven to be among the best in this regard. This paper presents the evolution of the development of metal oxide nanostructures (MONs) as photocatalysts for ciprofloxacin degradation. It begins with an overview of the role of these materials in photocatalysis; then, it discusses methods of obtaining them. Then, a detailed review of the most important oxide semiconductors (ZnO, TiO2, CuO, etc.) and alternatives for improving their photocatalytic performance is provided. Finally, a study of the degradation of ciprofloxacin in the presence of oxide semiconductor materials and the main factors affecting photocatalytic degradation is carried out. It is well known that antibiotics (in this case, ciprofloxacin) are toxic and non-biodegradable, which can pose a threat to the environment and human health. Antibiotic residues have several negative impacts, including antibiotic resistance and disruption of photosynthetic processes.
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Affiliation(s)
- Petronela Pascariu
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Carmen Gherasim
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Anton Airinei
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
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29
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Das S, Sanjay M, Singh Gautam AR, Behera R, Tiwary CS, Chowdhury S. Low bandgap high entropy alloy for visible light-assisted photocatalytic degradation of pharmaceutically active compounds: Performance assessment and mechanistic insights. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 342:118081. [PMID: 37182480 DOI: 10.1016/j.jenvman.2023.118081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/23/2023] [Accepted: 05/01/2023] [Indexed: 05/16/2023]
Abstract
The incessant accumulation of pharmaceutically active compounds (PhACs) in various environmental compartments represents a global menace. Herein, an equimolar high entropy alloy (HEA), i.e., FeCoNiCuZn, is synthesized via a facile and scalable method, and its effectiveness in eliminating four different PhACs from aqueous matrices is rigorously examined. Attributing to its relatively low bandgap and multielement active sites, the as-synthesized quinary HEA demonstrates more pronounced photocatalytic decomposition efficiency, towards tetracycline (86%), sulfamethoxazole (94%), ibuprofen (80%), and diclofenac (99%), than conventional semiconductor-based photocatalysts, under visible light irradiation. Additionally, radical trapping assays are conducted, and the dissociation intermediates are identified, to probe the plausible photocatalytic degradation pathways. Further, the end-products of FeCoNiCuZn-mediated photocatalysis are apparently non-toxic, and the HEA can be successfully recycled repeatedly, with no obvious leaching of heavy metal ions. Overall, the findings of this study testify the applicability of FeCoNiCuZn as a visible light-active photocatalyst, for treating wastewaters contaminated with PhACs.
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Affiliation(s)
- Shubhasikha Das
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
| | - M Sanjay
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
| | - Abhay Raj Singh Gautam
- Department of Materials Engineering, Indian Institute of Technology Gandhinagar, Gujarat, 382055, India
| | - Rakesh Behera
- Department of Materials Engineering, Indian Institute of Technology Gandhinagar, Gujarat, 382055, India
| | - Chandra Sekhar Tiwary
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India.
| | - Shamik Chowdhury
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India.
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30
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Kuspanov Z, Baglan B, Baimenov A, Issadykov A, Yeleuov M, Daulbayev C. Photocatalysts for a sustainable future: Innovations in large-scale environmental and energy applications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 885:163914. [PMID: 37149164 DOI: 10.1016/j.scitotenv.2023.163914] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/12/2023] [Accepted: 04/29/2023] [Indexed: 05/08/2023]
Abstract
The growing environmental and energy crises have prompted researchers to seek new solutions, including large-scale photocatalytic environmental remediation and the production of solar hydrogen using photocatalytic materials. To achieve this goal, scientists have developed numerous photocatalysts with high efficiency and stability. However, the large-scale application of photocatalytic systems under real-world conditions is still limited. These limitations arise at every step, including the large-scale synthesis and deposition of photocatalyst particles on a solid support, and the development of an optimal design with high mass transfer and efficient photon absorption. The purpose of this article is to provide a detailed description of the primary challenges and potential solutions encountered in scaling up photocatalytic systems for use in large-scale water and air purification and solar hydrogen production. Additionally, based on a review of current pilot developments, we draw conclusions and make comparisons regarding the main operating parameters that affect performance, as well as propose strategies for future research.
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Affiliation(s)
- Zhengisbek Kuspanov
- Satbayev University, 050013 Almaty, Kazakhstan; Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation
| | - Bakbolat Baglan
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; Al Farabi Kazakh National University, 050040 Almaty, Kazakhstan
| | - Alzhan Baimenov
- Al Farabi Kazakh National University, 050040 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan
| | - Aidos Issadykov
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan
| | - Mukhtar Yeleuov
- Satbayev University, 050013 Almaty, Kazakhstan; Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
| | - Chingis Daulbayev
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan.
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31
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Kang M, Yu SH, Baek KY, Sung MM, Cho S. MIL-101-NH 2(Fe)-Coated Nylon Microfibers for Immobilized Photocatalysts in RhB and Cr(VI) Removal. ACS OMEGA 2023; 8:15298-15305. [PMID: 37151491 PMCID: PMC10157658 DOI: 10.1021/acsomega.3c00432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 04/11/2023] [Indexed: 05/09/2023]
Abstract
MIL-101-NH2(Fe) is one of the effective photocatalytic metal-organic frameworks (MOFs) working under visible light. However, its powder-type form inhibits reusability in practical applications. In this study, we immobilized MIL-101-NH2(Fe) on a polymeric microfiber mesh to improve reusability while minimizing the loss of catalytic performance. To overcome the lack of surface functionality of the nylon fibers, an atomic layer deposition Al2O3 layer and NH2-BDC linker were introduced to facilitate uniform coating of the MOF on the fiber surface. The reactions of the metal precursor to the nylon substrate and NH2-BDC ligand of the MOF allow chemical bonding from the core to the shell of the entire hybrid catalytic materials. The resulting fiber-immobilized MOFs (Nylon@Al2O3@MOF) demonstrated high photocatalytic performance in the removal of RhB and Cr(VI) as representatives of organic dyes and heavy metals, respectively, while retaining over 85% of its efficiency after five cycles.
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Affiliation(s)
- Munchan Kang
- Materials
Architecturing Research Center, Korea Institute
of Science and Technology, Seoul 02792, Republic of Korea
- Department
of Chemistry, Hanyang University, Seoul 04763, Republic of Korea
| | - Sung Ho Yu
- Materials
Architecturing Research Center, Korea Institute
of Science and Technology, Seoul 02792, Republic of Korea
- Department
of Chemistry, Hanyang University, Seoul 04763, Republic of Korea
| | - Kyung-Youl Baek
- Materials
Architecturing Research Center, Korea Institute
of Science and Technology, Seoul 02792, Republic of Korea
- Division
of Nano and Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
- KHU-KIST
Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic
of Korea
| | - Myung Mo Sung
- Department
of Chemistry, Hanyang University, Seoul 04763, Republic of Korea
| | - Sangho Cho
- Materials
Architecturing Research Center, Korea Institute
of Science and Technology, Seoul 02792, Republic of Korea
- Division
of Nano and Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
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32
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Wei S, Zheng H, Zhao JJ, Yu S, Wu B, Zhang G, Zhang S. Substituent effect in self-sensitized degradation of Acid Orange 7 in solar/diketone processes. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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33
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Zhang J, Luo J, Zhao X, Wang K, Xie T, Xu T, Qiao M. Enhanced photoelectrocatalytic decomplexation of Ni-EDTA and simultaneous recovery of metallic nickel via TiO 2/Ni-Sb-SnO 2 bifunctional photoanode and activated carbon fiber cathode. J Environ Sci (China) 2023; 126:198-210. [PMID: 36503749 DOI: 10.1016/j.jes.2022.05.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/15/2022] [Accepted: 05/15/2022] [Indexed: 06/17/2023]
Abstract
In order to enhance Ni-EDTA decomplexation and Ni recovery via photoelectrocatalytic (PEC) process, TiO2/Ni-Sb-SnO2 bifunctional electrode was fabricated as the photoanode and activated carbon fiber (ACF) was introduced as the cathode. At a cell voltage of 3.5 V and initial solution pH of 6.3, the TiO2/Ni-Sb-SnO2 bifunctional photoanode exhibited a synergetic effect on the decomplexation of Ni-EDTA with the pseudo-first-order rate constant of 0.01068 min-1 with 180 min by using stainless steel (SS) cathode, which was 1.5 and 2.4 times higher than that of TiO2 photoanode and Ni-Sb-SnO2 anode, respectively. Moreover, both the efficiencies of Ni-EDTA decomplexation and Ni recovery were improved to 98% from 86% and 73% from 41% after replacing SS cathode with ACF cathode, respectively. Influencing factors on Ni-EDTA decomplexation and Ni recovery were investigated and the efficiencies were favored at acidic condition, higher cell voltage and lower initial Ni-EDTA concentration. Ni-EDTA was mainly decomposed via ·OH radicals which generated via the interaction of O3, H2O2, and UV irradiation in the contrasted PEC system. Then, the liberated Ni2+ ions which liberated from Ni-EDTA decomplexation were eventually reduced to metallic Ni on the ACF cathode surface. Finally, the stability of the constructed PEC system on Ni-EDTA decomplexation and Ni recovery was exhibited.
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Affiliation(s)
- Juanjuan Zhang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Luo
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Beijing Drainage Group Co., Ltd., Beijing 100044, China; Beijing Engineering Research Center of Wastewater Resource, Beijing 100124, China
| | - Xu Zhao
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kaifeng Wang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tengfei Xie
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Tongguang Xu
- Beijing Third Class Tobacco Supervision Station, Beijing 101121, China
| | - Meng Qiao
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Chen ZY, Huang NY, Xu Q. Metal halide perovskite materials in photocatalysis: Design strategies and applications. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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35
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Ma J, Shi Y, An D, Chen Y, Guo J, Qian Y, Wang S, Lu J. Inactivation mechanism of E. coli in water by enhanced photocatalysis under visible light irradiation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 866:161450. [PMID: 36623654 DOI: 10.1016/j.scitotenv.2023.161450] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 01/03/2023] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Developing efficient and economical technologies for drinking water disinfection remains a challenge. We synthesized Ag/AgBr/LDH doped with various silver mass concentrations and explored its ability to inactivate E. coli under visible light irradiation (λ ≥ 400 nm). Our results indicated a total inactivation of E. coli (107 CFU·mL-1) within 80 min using 2 % Ag/AgBr/LDH in a laboratory-scale test. The method was evaluated for disinfecting three effluent samples collected from one drinking water treatment plant, covering representative water treatment processes. After five consecutive runs, the inactivation efficiency decreased slightly to 89 % in CFU·mL-1, indicating that the photocatalysts had excellent stability and reusability. The mechanisms were analyzed by combining chemical and biological methods. It was verified that singlet oxygen (1O2), hydrogen peroxide (H2O2), and photo-generated electrons (e-) were significant contributors to the inactivation process. Scanning electron microscopy images analysis showed the disruption of the membrane integrity of E. coli by photocatalytic oxidation. Internal component leakage and reduced enzyme activity were also observed in terms of K+ leakage, β-galactosidase activity, and antioxidant enzyme activity. The results by the transcriptomic analysis implied that Ag/AgBr/LDH regulating the oxidative stress response and cell membrane damage related genes was the main inactivation mechanism.
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Affiliation(s)
- Jiaxin Ma
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200238, China
| | - Yijun Shi
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200238, China
| | - Dong An
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200238, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
| | - Yanan Chen
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200238, China
| | - Jun Guo
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200238, China
| | - Yunkun Qian
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200238, China
| | - Sheng Wang
- Shanghai Chengtou Water (Group) Co., Ltd, Shanghai 200086, China
| | - Jinrong Lu
- Shanghai Chengtou Water (Group) Co., Ltd, Shanghai 200086, China
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Lee S, Bae HS, Choi W. Selective Control and Characteristics of Water Oxidation and Dioxygen Reduction in Environmental Photo(electro)catalytic Systems. Acc Chem Res 2023; 56:867-877. [PMID: 36947463 PMCID: PMC10077592 DOI: 10.1021/acs.accounts.3c00002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
ConspectusEmploying semiconductor materials is a popular engineering method to harvest solar energy, which is widely investigated for photocatalysis (PC) and photoelectrocatalysis (PEC) that convert solar light to chemical energy. In particular, environmental photo(electro)catalysis has been extensively studied as a sustainable method for water treatment, air purification, and resource recovery. Environmental PC/PEC processes working in ambient conditions are initiated mainly through hole transfer to water (water oxidation) and electron transfer to dioxygen (O2 reduction) and the subsequent photoredox transformation of water and dioxygen serves as a base of various PC/PEC systems. Through the redox transformations, different products can be generated depending on the number of transferred electrons and holes. The single electron/hole transfer generates radical species and reactive oxygen species (ROS) which initiate the degradation/transformation of various pollutants in water and air, while the multicharge transfer can generate energy-rich chemicals (e.g., H2, H2O2). Therefore, understanding the characteristics of the photoredox reactions of water and dioxygen on the semiconductor surface is critically important in controlling the selectivity and efficiency of photoconversion processes.In this Account, we describe various environmental PC/PEC conversions with a particular focus on how the phototransformation of dioxygen and water is related to the overall processes occurring on diverse semiconductor materials. The activation of water or dioxygen can be controlled by modifying the properties of semiconductors, changing the kind of counterpart half-reaction and the experimental conditions. If water can be used as a ubiquitous reductant under solar irradiation, many kinds of reductive transformations can be carried out under ambient environmental conditions. For example, various toxic oxyanions (or metal ions) can be reductively transformed to harmless or less harmful species or useful chemicals/fuels can be synthesized under ambient conditions if water can provide electrons and protons via solar water oxidation. On the other hand, dioxygen can turn into reactive oxygen species (ROS) as a versatile oxidant or to a chemical like H2O2. There should be many more possibilities of utilizing the photoconversion of water and dioxygen for environmentally significant purposes, which are yet to be further developed and demonstrated. In this Account, we highlight the recent strategies and the novel functional materials for effective activation of water and dioxygen in environmental PC/PEC systems. Design of environmentally functional PC/PEC systems should be based on better understanding of water and dioxygen activation.
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Affiliation(s)
- Shinbi Lee
- KENTECH Institute for Environmental and Climate Technology, Korea Institute of Energy Technology (KENTECH), Naju 58330, Korea
| | - Ho-Sub Bae
- Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Wonyong Choi
- KENTECH Institute for Environmental and Climate Technology, Korea Institute of Energy Technology (KENTECH), Naju 58330, Korea
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Maghsoodi M, Jacquin C, Teychené B, Lesage G, Snow SD. Delineating the Effects of Molecular and Colloidal Interactions of Dissolved Organic Matter on Titania Photocatalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:3752-3761. [PMID: 36745071 PMCID: PMC10018764 DOI: 10.1021/acs.langmuir.2c03487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/25/2023] [Indexed: 06/18/2023]
Abstract
In the face of significant challenges to practical applications of photocatalysis for water treatment, recent reports revealed a potential route to overcome a problem posed by dissolved organic matter (DOM). These studies showed that inhibition of photocatalytic processes by DOM is driven largely by competition for active surface sites on TiO2 or other catalysts, and controlling the type of DOM present in solution could significantly mitigate DOM fouling. Whether or not control of solution parameters could achieve the same preventative action is not known. Here, a series of DOM isolates, including humic acid (HA) and transphilic (TPI), hydrophobic (HPO), or colloidal fractions of organic matter from a membrane bioreactor mixed liquor supernatant, were tested for inhibitory activity under a range of pH values (3, 5, 7, and 9) and ionic compositions (NaCl, CaCl2, and Al2(SO4)3 with ionic strengths (IS) ranging from 0 to 3 M). The resulting TiO2-DOM agglomerates were monitored for size and ζ-potential. Inhibitory profiles were generated using para-chlorobenzoic acid (pCBA) as probe with varying concentrations of inhibitory DOM for each solution condition to discern the extent of surface-phase quenching of radicals. Manipulation of pH clearly impacted inhibition, and the effect varied by DOM type; for example, interference occurred at all pHs for HA, at neutral or basic pHs for TPI, and only at pH 7 for HPO. Particle sizes did not correlate with inhibitory action of DOM. Increases in ionic strength induced growth of TiO2 and TiO2-DOM agglomerates, but again, particle sizes did not correlate to inhibition by DOM. The changes to IS, regardless of ion type, were not affected by the presence of TPI or HPO. Since particle stability did not correlate directly with photocatalytic activity, we suggest that surface-based quenching reactions arise from site-specific adsorption rather than generalized particle destabilization and aggregation.
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Affiliation(s)
- Mostafa Maghsoodi
- Department
of Civil and Environmental Engineering, Louisiana State University, 3255 Patrick Taylor Hall, Baton Rouge, Louisiana 70803, United States
| | - Céline Jacquin
- Eawag,
Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, 8600, Dübendorf, Switzerland
| | - Benoit Teychené
- IC2MP
(Institut de Chimie des Milieux et Matériaux de Poitiers),
UMR CNRS 7285), Université de Poitiers, 1 rue Marcel Doré, 86073 Poitiers, Cedex 9, France
| | - Geoffroy Lesage
- IEM
(Institut Européen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université de Montpellier, Place E. Bataillon, F- 34095 Montpellier, France
| | - Samuel D. Snow
- Department
of Civil and Environmental Engineering, Louisiana State University, 3255 Patrick Taylor Hall, Baton Rouge, Louisiana 70803, United States
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Martínez-Sabando J, Coin F, Melillo JH, Goyanes S, Cerveny S. A Review of Pectin-Based Material for Applications in Water Treatment. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16062207. [PMID: 36984087 PMCID: PMC10055932 DOI: 10.3390/ma16062207] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/02/2023] [Accepted: 03/07/2023] [Indexed: 06/12/2023]
Abstract
Climate change and water are inseparably connected. Extreme weather events cause water to become more scarce, polluted, and erratic than ever. Therefore, we urgently need to develop solutions to reduce water contamination. This review intends to demonstrate that pectin-based materials are an excellent route to detect and mitigate pollutants from water, with several benefits. Pectin is a biodegradable polymer, extractable from vegetables, and contains several hydroxyl and carboxyl groups that can easily interact with the contaminant ions. In addition, pectin-based materials can be prepared in different forms (films, hydrogels, or beads) and cross-linked with several agents to change their molecular structure. Consequently, the pectin-based adsorbents can be tuned to remove diverse pollutants. Here, we will summarize the existing water remediation technologies highlighting adsorption as the ideal method. Then, the focus will be on the chemical structure of pectin and, from a historical perspective, on its structure after applying different cross-linking methods. Finally, we will review the application of pectin as an adsorbent of water pollutants considering the pectin of low degree methoxylation.
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Affiliation(s)
- Javier Martínez-Sabando
- Centro de Física de Materiales (CSIC, UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Francesco Coin
- Centro de Física de Materiales (CSIC, UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Jorge H. Melillo
- Donostia International Physics Center (DIPC), 20018 San Sebastián, Spain
| | - Silvia Goyanes
- Laboratorio de Polímeros y Materiales Compuestos (LP&MC), Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1113, Argentina
- Instituto de Física de Buenos Aires (IFIBA), CONICET—Universidad de Buenos Aires, Ciudad Universitaria (C1428EGA), Buenos Aires 1113, Argentina
| | - Silvina Cerveny
- Centro de Física de Materiales (CSIC, UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Donostia International Physics Center (DIPC), 20018 San Sebastián, Spain
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39
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Ren X, Yao H, Tang R, A R, Yuan S, Wang W, Ali IM, Hu ZH. Modification of TiO 2 by Er 3+ and rGO enhancing visible photocatalytic degradation of arsanilic acid. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:35023-35033. [PMID: 36525183 DOI: 10.1007/s11356-022-24627-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
As a typical wide band gap photocatalyst, titania (TiO2) cannot use the visible light and has fast recombination rate of photogenerated electron-hole pairs. Simultaneous introduction of erbium ion (Er3+) and graphene oxide (rGO) into TiO2 might overcome these two drawbacks. In this study, Er3+ and rGO were co-doped on TiO2 to synthesize Er3+-rGO/TiO2 photocatalyst through a two-step sol-gel method. Based on the UV-visible diffuse reflectance spectra and photoluminescence spectrum, the introduction of Er3+ and rGO increased the visible light absorption efficiency and enhanced the migration of photogenerated electron. Pure TiO2 has almost no photocatalytic activity for arsanilic acid (p-ASA) degradation under visible light irradiation. However, while doping with 2.0 mol% Er3+ and 10.0 mol% rGO, the p-ASA could be completely degraded within 50 min by the Er3+-rGO/TiO2 photocatalyst under visible light irradiation, and most of produced inorganic arsenic was in situ removed by adsorption from the solution. The reactive oxygen species (ROS) reacting with p-ASA was determined and superoxide radical (O2•-) and singlet oxygen (1O2) were the dominant ROS for the oxidation of p-ASA and arsenite. This work provides an approach of introducing Er3+ and rGO to enhance the visible light photocatalytic efficiency of TiO2.
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Affiliation(s)
- Xinghao Ren
- Anhui Engineering Laboratory of Rural Water Environment and Resource, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Hang Yao
- College of Civil Engineering and Architecture, Tongling University, Tongling, 244000, People's Republic of China
| | - Rui Tang
- Anhui Engineering Laboratory of Rural Water Environment and Resource, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China
| | - Rong A
- Anhui Engineering Laboratory of Rural Water Environment and Resource, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Shoujun Yuan
- Anhui Engineering Laboratory of Rural Water Environment and Resource, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Wei Wang
- Anhui Engineering Laboratory of Rural Water Environment and Resource, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Ibrahim Mohamed Ali
- Department of Soil and Water, Faculty of Agriculture, Benha University, Benha, 13518, Egypt
| | - Zhen-Hu Hu
- Anhui Engineering Laboratory of Rural Water Environment and Resource, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China.
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Xu N, Chen J, Hu C, Zhu Z, Wang W, Liu B. Supported photocatalyst for Cr (VI) conversion and removal of organic pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:44130-44147. [PMID: 36689106 DOI: 10.1007/s11356-023-25434-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/16/2023] [Indexed: 06/17/2023]
Abstract
The photocatalytic property of available semiconductor catalysts still suffers from some urgent problems, such as the high excitation energy, easy agglomeration of powders, or weak recycling property. Therefore, developing novel visible light-supported catalysts and catalyst loading have aroused great attention recently. In this work, a novel Ag3PO4/BiVO4/MWCNTs@Cotton functional fabric was prepared by introducing Ag3PO4 as a plasma resonance photocatalyst and MWCNTs with cotton as composite substrates. Not only did the introduction of Ag3PO4 and MWCNTs effectively strengthen the application ability of BiVO4, but also inhibited the recombination of carriers, and promoted the transport of carriers according to spectroscopic and electrochemical tests. Degradation tests remained that Ag3PO4/BiVO4/MWCNTs @cotton retained the high photocatalytic efficiency of the powder catalyst, along with the degradation degree of active blue KN-R (50mg/L) as well as Cr (VI) (20mg/L) could reach more than 90% within 120 min. What's more, the functional fabric has gained excellent performance in degrading pollutants for 5 cycles. Meanwhile, the prepared BiVO4 is consistent with the band structure and electron density calculated theoretically by the GGA-PBE function. Free radical trapping and scavenging experiments exhibited that functional fabrics could produce active substances such as h+,·O2-, and·OH, among which the first two are the main active substances in the reaction. To sum up, this study is an effective attempt based on the existing problems of photocatalysts together with providing some study directions for the development of photocatalytic technology in the future.
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Affiliation(s)
- Nan Xu
- Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering, Innovation Center for Textile Science and Technology, Donghua University, No. 2999 North Renmin Road, Shanghai, 201620, China
| | - Jingshan Chen
- Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering, Innovation Center for Textile Science and Technology, Donghua University, No. 2999 North Renmin Road, Shanghai, 201620, China
| | - Chunyan Hu
- Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering, Innovation Center for Textile Science and Technology, Donghua University, No. 2999 North Renmin Road, Shanghai, 201620, China
| | - Zhijia Zhu
- Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering, Innovation Center for Textile Science and Technology, Donghua University, No. 2999 North Renmin Road, Shanghai, 201620, China
| | - Wei Wang
- Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering, Innovation Center for Textile Science and Technology, Donghua University, No. 2999 North Renmin Road, Shanghai, 201620, China
- Department of Textile & Garment Engineering, Changshu Institute of Technology, 215500, Suzhou, China
| | - Baojiang Liu
- Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering, Innovation Center for Textile Science and Technology, Donghua University, No. 2999 North Renmin Road, Shanghai, 201620, China.
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41
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Influence of flake size and electrolyte conditions on graphene oxide adsorption of ionic dyes. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2023.118387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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42
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Pyrite Cinder as an Effective Fenton-like Catalyst for the Degradation of Reactive Azo Dye: Effects of Process Parameters and Complete Effluent Characterization. Catalysts 2023. [DOI: 10.3390/catal13020424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
This research investigates the potential use of pyrite cinder (PC) as an efficient Fenton-like catalyst for the removal of the reactive azo dye Reactive Red 120 (RR120) from aqueous solutions. The characterization of its PC structure and composition confirmed its great potential to act as catalytic iron source in a heterogeneous Fenton system. Dye removal optimization was performed in terms of PC dosage (0.4–8 g/L), H2O2 concentration (2–25 mM), pH value (2–4.6), initial dye concentration (50–200 mg/L), and mixing time. The highest decolorization efficiency (92%) was achieved after a reaction time of 480 min under following conditions: RR120 = 50 mg/L, PC = 4 g/L, H2O2 = 10 mM, and pH = 3. After decolorization, an extensive analysis of the generated effluent was performed regarding metal leaching, mineralization, toxicity, and degradation product formation. The metal leaching indicated the necessity for a pH increase in order to remove the settled metal hydroxides. The mineralization efficiency was satisfactory, reaching 85% and 62% of the COD and TOC removal, respectively. The respirometry measurements and bioluminescence tests indicated the detoxification of the treated solution. The absorption spectra and GC/MS analysis confirmed the changes in the molecular structure in the form of the destruction of the azo bond, with a simpler aromatic and aliphatic intermediates formation. This study provides an effective method for removing azo dye in polluted water by employing waste tailings as alternative Fenton-like catalysts, while also using waste tailings as the secondary resource.
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Qin Y, Yuan J, Hu H, Shen Q, Hu S, Liu J, Luo X, Xu D. Construction of PANI‐ZnFe
2
O
4
/FAC materials with fly ash cenospheres beads as a carrier to enhance the degradation of Methylene Blue. ChemistrySelect 2023. [DOI: 10.1002/slct.202204488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- Yu Qin
- School of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing No. 20 East University Town Road, Shapingba District Chongqing 401331 P.R. China
| | - Jinhai Yuan
- School of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing No. 20 East University Town Road, Shapingba District Chongqing 401331 P.R. China
| | - Haikun Hu
- School of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing No. 20 East University Town Road, Shapingba District Chongqing 401331 P.R. China
| | - Qiqi Shen
- School of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing No. 20 East University Town Road, Shapingba District Chongqing 401331 P.R. China
| | - Shiyue Hu
- School of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing No. 20 East University Town Road, Shapingba District Chongqing 401331 P.R. China
| | - Junhong Liu
- School of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing No. 20 East University Town Road, Shapingba District Chongqing 401331 P.R. China
| | - Xuanlan Luo
- School of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing No. 20 East University Town Road, Shapingba District Chongqing 401331 P.R. China
| | - Di Xu
- School of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing No. 20 East University Town Road, Shapingba District Chongqing 401331 P.R. China
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Lawrence RT, Croxall MP, Lu C, Goh MC. TiO 2-NGQD composite photocatalysts with switchable photocurrent response. NANOSCALE 2023; 15:2788-2797. [PMID: 36661891 DOI: 10.1039/d2nr06587h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
A series of titanium dioxide-nitrogen doped graphene quantum dot (TiO2-NGQD) composite photocatalysts were synthesized through a simple hydrothermal reaction with varied NGQD content. Through a proposed Z-Scheme heterojunction, the composites were able to achieve increased photocurrent generation and photocatalytic degradation of phenol under both full spectrum and visible only illumination. The prepared composites were able to switch from anodic to cathodic photocurrent by changing the light source from full spectrum to visible wavelengths. The photocatalytic capabilities of the composites were tested by degrading phenol and this was monitored via nuclear magnetic resonance. All composites outperformed the commercial standard P25 TiO2 under both full spectrum and visible irradiation, with the 8 wt% NGQD composite showing a visible improvement of over 600% compared to P25. With the ability to manipulate the generation of majority charge carriers, TiO2-NGQDs have significant potential not only in photocatalysis, but in far reaching applications such as energy harvesting and water splitting.
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Affiliation(s)
- Reece T Lawrence
- Dept of Material Science and Engineering, University of Toronto, 184 College St, Toronto, Ontario, Canada.
| | - Mark P Croxall
- Department of Chemistry, University of Toronto, 80 St. George St, Toronto, Ontario, Canada
| | - Cheng Lu
- Department of Chemistry, University of Toronto, 80 St. George St, Toronto, Ontario, Canada
| | - M Cynthia Goh
- Dept of Material Science and Engineering, University of Toronto, 184 College St, Toronto, Ontario, Canada.
- Department of Chemistry, University of Toronto, 80 St. George St, Toronto, Ontario, Canada
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45
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Wen H, Pan Z, Wang X, Li K, Wang Q, Luo J, Fu H, Zhang L, Wang Z. Dissolution behaviors of a visible-light-responsive photocatalyst BiVO 4: Measurements and chemical equilibrium modeling. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130187. [PMID: 36327834 DOI: 10.1016/j.jhazmat.2022.130187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/28/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Despite of the extensive research in semiconductor photocatalysis with respect to material and device innovations, much of the fundamental aquatic chemistry of those new materials that governs their environmental hazard and implications remains poorly understood. BiVO4 has long been recognized as a promising visible-light-responsive photocatalyst. However, the solubility product (Ksp) of BiVO4 and the mechanistic understanding of the non-stoichiometric dissolution of BiVO4 remain unclear. Here, we investigated the solubility of BiVO4 via the observation on its non-stoichiometric dissolution in the pH range of 4-9. Combining dissolution experiments, adsorption behavior and thermodynamic equilibrium calculations, the Ksp of BiVO4 was determined to be 10-35.81±0.51. The solubility and stability of BiVO4 were strongly pH-dependent, with the lowest solubility and highest stability near pH 5. Furthermore, we tested the effect of illumination on the dissolution of BiVO4, which was significantly enhanced by light. Under both dark and illumination conditions, adsorption of dissolved bismuth by BiVO4 solids was the main reason for the non-stoichiometric dissolution of BiVO4, and could be modeled by including an additional surface complexation reaction. Thus, the results highlighted the importance of considering the dissolution of photocatalysts, and presented a feasible method to evaluate environmental stability and risks of other semiconductor materials.
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Affiliation(s)
- Hongbiao Wen
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Zezhen Pan
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China.
| | - Xingxing Wang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Kejian Li
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Qihuang Wang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Jinming Luo
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hongbo Fu
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Liwu Zhang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Zimeng Wang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China.
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46
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Thongam DD, Chaturvedi H. Induced defect and ZnO nano-flower formation by N, N, dimethylformamide solvent for natural sunlight responsive floating photocatalytic advanced oxidation process. CHEMOSPHERE 2023; 313:137600. [PMID: 36549513 DOI: 10.1016/j.chemosphere.2022.137600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/01/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
The increasing disposal of dyes and face-mask propel to hunt for a solution to fight water pollution while assisting sustainability. This research overcomes the key challenges associated with implementing photocatalytic water treatment by using natural sunlight active photocatalyst, changing slurry system, eliminating the use of external triggering sources, and reusing face-mask fabric coated with ZnO to act as a floating photocatalyst. Unique morphological structures-cauliflower, hydrangea, and petals-likes are obtained with the variation in synthesis medium (Diethylene glycol (DEG), N, N-dimethyl formamide (DMF), H2O) and methods (precipitation, solvothermal) which are found to be dependent on the solvent properties. With the use of DMF having a higher dielectric constant and formation of dimethyl amine via hydrolysis, it influences in forming petals and flower-like morphologies, unlike DEG solvent. The ZnO-coated face-mask fabric is used as the floating photocatalyst under natural sunlight observing comparable 91% degradation efficiency in 100 min with that of 99% efficiency in the UV light-illuminated slurry system. The formation of petals-like structures, defects from the liberation of DMF molecules from the ZnO surface by calcination, larger pore sizes and pore volumes provided a synergistic effect on enhancing the degradation efficiency in these cases.
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Affiliation(s)
- Debika Devi Thongam
- School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Assam, 781039, India.
| | - Harsh Chaturvedi
- School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Assam, 781039, India.
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Lin C, Liu Z, Zhao Y, Song C, Meng F, Song B, Zuo G, Qi Q, Wang Y, Yu L, Song M. Oxygen-mediated dielectric barrier discharge plasma for enhanced degradation of chlorinated aromatic compounds. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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48
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Construction of Z-scheme Ti/Ga co-doped ZnO heterostructure photocatalyst with graphitic carbon nitride for efficient visible-light-driven dye degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:43702-43713. [PMID: 36662425 DOI: 10.1007/s11356-023-25276-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 01/08/2023] [Indexed: 01/21/2023]
Abstract
Innovative solar-driven heterostructure photocatalysts are promising for removing the organic contaminants in the water environment. In this work, a sequence of well-defined Z-scheme Ti-Ga co-doped ZnO/g-C3N4 (TGZ/CN) heterostructure photocatalysts were developed via a simple sol-gel method and the single-phase dispersion method in order to realize the cooperative improvement from the Ti/Ga co-doping and construction of heterostructure. The synthesized samples were analyzed by a variety of characterization techniques, and the photocatalytic activity was assessed by photodegradation of methylene blue (MB) under visible light irradiation. Compared to the ZnO and g-C3N4, the TGZ/CN composite demonstrated higher photocatalytic performance for the degradation of MB indicating an efficient photocatalytic degradation rate of 95.4% in 105 min under visible light. Moreover, the TGZ/CN photocatalyst exhibited excellent stability after five cycles of MB photodegradation. Furthermore, the as-prepared composites' possible photocatalytic mechanism was discussed in detail. The improved photocatalytic performance primarily resulted from the effectively reduced band gap of ZnO after Ti/Ga co-doping and the facilitated separation of photoexcited e-/h+ pairs caused by the construction of Z-scheme heterojunction. This work offers novel insights in developing hybrids with highly efficient photocatalytic activity towards future environmental applications.
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Linkage-Affected Donor–Acceptor Covalent Organic Frameworks for Photocatalytic Hydrogen Production. Processes (Basel) 2023. [DOI: 10.3390/pr11020347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The depletion of traditional fossil energy and the resulting environmental pollution forces people to explore new energy sources. Direct use of solar energy is now a viable solution for solving these problems. Covalent organic frameworks (COFs) are a porous crystalline material; their well-defined two-dimensional or three-dimensional frameworks can ensure the orderly arrangement of photoelectric active units, giving them potential photoelectric conversion applications. The tunable structural features endow COFs many advantages in photocatalytic hydrogen production under visible light. This review comprehensively summarizes the research progress on photoelectronic donor–acceptor (D-A) COFs with tunable structure for photocatalytic hydrogen evolution and will provide a feasible guiding strategy for applying this type of COFs in photocatalytic hydrogen production.
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Huo Z, Kim YJ, Chen Y, Song T, Yang Y, Yuan Q, Kim SW. Hybrid energy harvesting systems for self-powered sustainable water purification by harnessing ambient energy. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 2023; 17:118. [PMID: 37096021 PMCID: PMC10115484 DOI: 10.1007/s11783-023-1718-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 03/01/2023] [Accepted: 03/03/2023] [Indexed: 05/03/2023]
Abstract
The development of self-powered water purification technologies for decentralized applications is crucial for ensuring the provision of drinking water in resource-limited regions. The elimination of the dependence on external energy inputs and the attainment of self-powered status significantly expands the applicability of the treatment system in real-world scenarios. Hybrid energy harvesters, which convert multiple ambient energies simultaneously, show the potential to drive self-powered water purification facilities under fluctuating actual conditions. Here, we propose recent advancements in hybrid energy systems that simultaneously harvest various ambient energies (e.g., photo irradiation, flow kinetic, thermal, and vibration) to drive water purification processes. The mechanisms of various energy harvesters and point-of-use water purification treatments are first outlined. Then we summarize the hybrid energy harvesters that can drive water purification treatment. These hybrid energy harvesters are based on the mechanisms of mechanical and photovoltaic, mechanical and thermal, and thermal and photovoltaic effects. This review provides a comprehensive understanding of the potential for advancing beyond the current state-of-the-art of hybrid energy harvester-driven water treatment processes. Future endeavors should focus on improving catalyst efficiency and developing sustainable hybrid energy harvesters to drive self-powered treatments under unstable conditions (e.g., fluctuating temperatures and humidity).
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Affiliation(s)
- Zhengyang Huo
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100872 China
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419 Republic of Korea
| | - Young Jun Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419 Republic of Korea
| | - Yuying Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023 China
| | - Tianyang Song
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100872 China
| | - Yang Yang
- Institute of Scientific and Technical Information of China, Beijing, 100038 China
| | - Qingbin Yuan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023 China
| | - Sang Woo Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419 Republic of Korea
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