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He X, Guo X, Xia Z, Wang L, Jiao Z. Unlocking enhanced photocatalytic power: Donor-acceptor synergy in non-metallic g-C 3N 4 hollow nanospheres. CHEMOSPHERE 2024; 361:142522. [PMID: 38838869 DOI: 10.1016/j.chemosphere.2024.142522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/30/2024] [Accepted: 06/01/2024] [Indexed: 06/07/2024]
Abstract
Selecting safe, non-toxic, and non-metallic semiconductor materials that facilitate the degradation of pollutants in water stands out as an optimal approach to combat environmental pollution. Herein, graphitic carbon nitride (g-C3N4)-based hollow nanospheres nonmetallic photocatalyst modified with covalent organic framework materials named TpMA, based on 1, 3, 5-trimethylchloroglucuronide (Tp) and melamine (MA), was successfully synthesized (abbreviated as CNTP). The ordered electron donor-acceptor structure inherent in TpMA contributed to enhancing the transport efficiency of photogenerated carriers in CNTP. The CNTP photocatalysts exhibited excellent performance in degrading rhodamine B and tetracycline in visible light, with optimal degradation rates reached more than 90% in 60 and 80 min, respectively, which were 5.3 and 3.0 times higher than those of pure CNNS. The increased photocatalytic efficiency observed in CNTP composites could be traced back to the covalently connection between the two molecules, forming a π-conjugated system that facilitated the separative efficiency of photogenerated electron-hole pairs and intensified the utilization of visible light. This study provided a new means to design and fabricate highly efficient and environmentally friendly non-metallic photocatalytic materials.
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Affiliation(s)
- Xinhua He
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China; Institute for Sustainable Energy/College of Science, Shanghai University, Shanghai, 200444, PR China
| | - Xiandi Guo
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Zijie Xia
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China; Institute for Sustainable Energy/College of Science, Shanghai University, Shanghai, 200444, PR China
| | - Linlin Wang
- Institute for Sustainable Energy/College of Science, Shanghai University, Shanghai, 200444, PR China.
| | - Zheng Jiao
- Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800, PR China.
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Zouari M, Hribernik S, Marrot L, Tzolov M, DeVallance DB. Manganese dioxide-coated biocarbon for integrated adsorption-photocatalytic degradation of formaldehyde in indoor conditions. Heliyon 2024; 10:e29993. [PMID: 38694080 PMCID: PMC11061683 DOI: 10.1016/j.heliyon.2024.e29993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/03/2024] [Accepted: 04/18/2024] [Indexed: 05/03/2024] Open
Abstract
Formaldehyde is a common indoor air pollutant with hazardous effects on human health. This study investigated the efficiency of biocarbon (BC) functionalized with variable contents of MnO2 for formaldehyde removal in ambient conditions via integrated adsorption-photocatalytic degradation technology. The sample with the highest formaldehyde removal potential was used to prepare a functional coating made of acrylic binder mixed with 20 wt% of the particles and applied on beech (Fagus sylvatica L) substrate. SEM images showed that MnO2 was deposited around and inside the pores of the BC. EDX spectra indicated the presence of Mn peaks and increased content of oxygen in the doped BC compared to pure BC, which indicated the successful formation of MnO2. Raman spectra revealed that the disorder in the BC's structure increased with increasing MnO2 loadings. FTIR spectra of BC-MnO2 samples displayed additional peaks compared to the BC spectrum, which were attributed to MnO vibrations. Moreover, the deposition of increased MnO2 loadings decreased the porosity of the BC due to pores blockage. The BC sample containing 8 % Mn exhibited the highest formaldehyde removal efficiency in 8 h, which was 91 %. A synergetic effect between BC and MnO2 was observed. The formaldehyde removal efficiency and capacity of the coating reached 43 % and 6.1 mg/m2, respectively, suggesting that the developed coating can be potentially used to improve air quality in the built environment.
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Affiliation(s)
- Mariem Zouari
- InnoRenew CoE, Livade 6a, 6310, Izola, Slovenia
- Faculty of Mathematics, Natural Sciences, and Information Technologies, University of Primorska, Muzejski trg 2, 6000, Koper, Slovenia
| | - Silvo Hribernik
- Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, SI-2000, Maribor, Slovenia
| | - Laetitia Marrot
- FRISSBE, Slovenian National Building and Civil Engineering Institute (ZAG), 1000, Ljubljana, Slovenia
| | - Marian Tzolov
- College of Science and Technology, Commonwealth University of Pennsylvania, 401 North Fairview Street, Lock Haven, PA, 17745, United States
| | - David B. DeVallance
- College of Science and Technology, Commonwealth University of Pennsylvania, 401 North Fairview Street, Lock Haven, PA, 17745, United States
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Rana S, Kumar A, Lai CW, Sharma G, Dhiman P. Recent progress in ZnCr and NiCr layered double hydroxides and based photocatalysts for water treatment and clean energy production. CHEMOSPHERE 2024; 356:141800. [PMID: 38554860 DOI: 10.1016/j.chemosphere.2024.141800] [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: 09/11/2023] [Revised: 02/29/2024] [Accepted: 03/24/2024] [Indexed: 04/02/2024]
Abstract
In pursuit of advancing photocatalysts for superior performance in water treatment and clean energy generation, researchers are increasingly focusing on layered double hydroxides (LDHs) which have garnered significant attention due to their customizable properties, morphologies, distinctive 2D layered structure and flexible options for modifying anions and cations. No review has previously delved specifically into ZnCr and NiCr LDH-based photocatalysts and therefore, this review highlights the recent surge in ZnCr and NiCr-based LDHs as potential photocatalysts for their applications in water purification and renewable energy generation. The structural and fundamental characteristics of layered double hydroxides and especially ZnCr-LDHs and NiCr-LDHs are outlined. Further, the various synthesis techniques for the preparation of ZnCr-LDHs, NiCr-LDHs and their composite and heterostructure materials have been briefly discussed. The applicability of ZnCr-LDH and NiCr-LDH based photocatalysts in tackling significant issues in water treatment and sustainable energy generation is the main emphasis of this review. It focuses on photocatalytic degradation of organic pollutants in wastewater, elucidating the principles and advancements for enhancing the efficiency of these materials. It also explores their role in H2 production through water splitting, conversion of CO2 into valuable fuels and NH3 synthesis from N2, shedding light on their potential for clean energy solutions. The insights presented herein offer valuable guidance for researchers working towards sustainable solutions for environmental remediation and renewable energy generation.
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Affiliation(s)
- Sahil Rana
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229
| | - Amit Kumar
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229.
| | - Chin Wei Lai
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University of Malaya (UM), 50603, Kuala Lumpur, Malaysia
| | - Gaurav Sharma
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229
| | - Pooja Dhiman
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229
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Zhao X, Shang S, Liu H, Peng C, Hu J. Dipole moment regulation for enhancing internal electric field in covalent organic frameworks photocatalysts. CHEMOSPHERE 2024; 356:141947. [PMID: 38599332 DOI: 10.1016/j.chemosphere.2024.141947] [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: 01/24/2024] [Revised: 03/16/2024] [Accepted: 04/06/2024] [Indexed: 04/12/2024]
Abstract
Covalent organic frameworks (COFs) have recently emerged as a kind of promising photocatalytic platform in addressing the growing threat of trace pollutants in aquatic environments. Along this, we propose a strategy of constructing internal electric field (IEF) in COFs through the dipole moment regulation, which intrinsically facilitates the separation and transfer of photogenerated excitons. Two COFs of BTT-TZ-COF and BTT-TB-COF are developed by linking the electron-donor of benzotrithiophene (BTT) block and the electron-acceptor of triazine (TZ) or tribenzene (TB) block, respectively. DFT calculations demonstrate TZ block with larger dipole moment can achieve more efficient IEF due to the stronger electron-attractive force and hence narrower bandgap. Moreover, featuring the highly-order crystalline structure for accelerating photo-excitons transfer and rich porosity for facilitating the adsorption, BTT-TZ-COF exhibited an excellent universal performance of photocatalytic degradations of various dyes. Specifically, a superior photodegradation efficiency of 99% Rhodamine B (RhB) is achieved within 20 min under the simulated sunlight. Therefore, this convenient construction approach of enhanced IEF in COFs through rational regulation of the dipole moment can be a promising way to realize high photocatalytic activity.
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Affiliation(s)
- Xiaoying Zhao
- Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Shuaishuai Shang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Honglai Liu
- Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; State Key Laboratory of Chemical Engineering and Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, China
| | - Changjun Peng
- Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
| | - Jun Hu
- Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
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Habibi-Yangjeh A, Pournemati K, Ahmadi Z, Khataee A. Decoration of Carbon Dots on Oxygen-Vacancy-Enriched S-Scheme TiO 2 Quantum Dots/TiO 2 Oxygen Vacancies Photocatalysts: Impressive Quantum-Dot-Sized Photocatalysts for Remediation of Antibiotics, Bacteria, and Dyes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:8503-8519. [PMID: 38608275 DOI: 10.1021/acs.langmuir.4c00060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2024]
Abstract
Today, cleaning the environment using photocatalytic technology is one of the main research activities. In this study, carbon dots (C-dots) were anchored on oxygen-vacancy-enriched TiO2 quantum dots (QDs)/TiO2 oxygen vacancies (OVs) using a facile procedure. The resultant ternary TiO2 QDs/TiO2 OVs/C-dots photocatalysts with a quantum dot size of almost 4.55 nm were used for detoxification of aqueous solutions containing four antibiotics and three organic dyes as well as inactivation of two pathogenic bacteria, including Escherichia coli and Staphylococcus aureus, upon visible light. The degradation constant of tetracycline over the optimized TiO2 QDs/TiO2 OVs/C-dots nanocomposite reached 714 × 10-4 min-1, which was 17.3, 12.1, and 2.92 times higher than TiO2 QDs, TiO2 OVs, and TQDs/TOVs (1:1) materials, respectively. Effective separation of electron-hole pairs between TiO2 QDs and TiO2 OVs counterparts through decorated C-dots by an established S-scheme system was the main reason for boosted photocatalytic activity. With regard to the facile growth of wheat and lentil seeds in the treated solutions, it is hoped that the TiO2 QDs/TiO2 OVs/C-dots nanocomposite with significant stability could be used to clean up wastewaters.
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Affiliation(s)
- Aziz Habibi-Yangjeh
- Department of Chemistry, Faculty of Science, University of Mohaghegh Ardabili, 56199-13131 Ardabil, Iran
| | - Khadijeh Pournemati
- Department of Chemistry, Faculty of Science, University of Mohaghegh Ardabili, 56199-13131 Ardabil, Iran
| | - Ziba Ahmadi
- Department of Biology, Faculty of Science, University of Mohaghegh Ardabili, 56199-13131 Ardabil, Iran
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran
- Department of Chemical Engineering, Istanbul Technical University, 34469 Istanbul, Turkey
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K C A, Rao CS, Nair V. Combination of ensemble machine learning models in photocatalytic studies using nano TiO 2 - Lignin based biochar. CHEMOSPHERE 2024; 352:141326. [PMID: 38301840 DOI: 10.1016/j.chemosphere.2024.141326] [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: 06/25/2023] [Revised: 12/08/2023] [Accepted: 01/27/2024] [Indexed: 02/03/2024]
Abstract
Synergizing photocatalytic reactions with machine learning methods can effectively optimize and automate the remediation of pollutants. In this work, commercial Degussa TiO2 nanoparticles and lignin based biochar (LB) where used to prepare TiO2: lignin based biochar (TLB) composites using ultrasound-assisted co-precipitation method. The photocatalytic property of the TLB composites where studied by conducting the photocatalytic degradation of a Basic blue 41 (BB41) dye. The influence of calcination temperature, T:LB compositions, catalyst dosage, initial dye pH, initial dye concentration, and illumination time on photocatalytic dye degradation were experimentally studied. The degradation efficiency of 96.72 % was obtained under optimized conditions for the photocatalyst calcined at 500 °C containing a 1:1 wt percentage of TiO2 and LB. The experimental data was further used to predict the photocatalytic degradation efficiency using Gradient Tree Boosting (GTB) and Extra Trees (ET) models. The GTB model gave the highest prediction accuracy of 94 %. The permutation variable importance revealed catalyst dosage and dye concentration as the most influential parameters in the prediction of the photocatalytic dye degradation efficiency.
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Affiliation(s)
- Abhayasimha K C
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore, Karnataka, 575025, India
| | - Chinta Sankar Rao
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore, Karnataka, 575025, India
| | - Vaishakh Nair
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore, Karnataka, 575025, India.
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