1
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Sun M, Xie Y, Huang J, Liu C, Dong Y, Li S, Zeng C. Oxygen-deficient AgIO 3 for efficiently photodegrading organic contaminants under natural sunlight. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 363:121393. [PMID: 38850920 DOI: 10.1016/j.jenvman.2024.121393] [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: 01/11/2024] [Revised: 05/31/2024] [Accepted: 06/03/2024] [Indexed: 06/10/2024]
Abstract
Defect engineering is regarded as an effective strategy to boost the photo-activity of photocatalysts for organic contaminants removal. In this work, abundant surface oxygen vacancies (Ov) are created on AgIO3 microsheets (AgIO3-OV) by a facile and controllable hydrogen chemical reduction approach. The introduction of surface Ov on AgIO3 broadens the photo-absorption region from ultraviolet to visible light, accelerates the photoinduced charges separation and migration, and also activates the formation of superoxide radicals (•O2-). The AgIO3-OV possesses an outstanding degradation rate constant of 0.035 min-1, for photocatalytic degrading methyl orange (MO) under illumination of natural sunlight with a light intensity is 50 mW/cm2, which is 7 and 3.5 times that of the pristine AgIO3 and C-AgIO3 (AgIO3 is calcined in air without generating Ov). In addition, the AgIO3-OV also exhibit considerable photoactivity for degrading other diverse organic contaminants, including azo dye (rhodamine B (RhB)), antibiotics (sulflsoxazole (SOX), norfloxacin (NOR), chlortetracycline hydrochloride (CTC), tetracycline hydrochloride (TC) and ofloxacin (OFX)), and even the mixture of organic contaminants (MO-RhB and CTC-OFX). After natural sunlight illumination for 50 min, 41.4% of total organic carbon (TOC) for MO-RhB mixed solution can be decreased over AgIO3-OV. In a broad range of solution pH from 3 to 11 or diverse water bodies of MO solution, AgIO3-OV exhibits attractive activity for decomposing MO. The MO photo-degradation process and mechanism over AgIO3-OV under natural sunlight irradiation has been systemically investigated and proposed. The toxicities of MO and its degradation intermediates over AgIO3-OV are compared using Toxicity Estimation Software (T.E.S.T.). Moreover, the non-toxicity of both AgIO3-OV catalyst and treated antibiotic solution (CTC-OFX mixture) are confirmed by E. coli DH5a cultivation test, supporting the feasibility of AgIO3-OV catalyst to treat organic contaminants in real water under natural sunlight illumination.
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Affiliation(s)
- Miaofei Sun
- Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China
| | - Yunchang Xie
- College of Life Sciences, Jiangxi Normal University, Nanchang, 330022, China
| | - Jiayang Huang
- Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China
| | - Chengyin Liu
- School of Environmental and Material Engineering, Yantai University, Yantai, 264005, China
| | - Yujing Dong
- School of Science and Technology, Xinyang College, Xinyang, 464000, China.
| | - Shijie Li
- National Engineering Research Center for Marine Aquaculture, College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, China.
| | - Chao Zeng
- Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China.
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Chen X, Yao L, Xu S, He J, Li N, Li J, Liu B, Zhu Y, Chen X, Wang H, Zhu R. Electron transfer mediated photo-Fenton-like synergistic catalysis of Fe,Cu-doped MIL-101 coupled with Ag 3PO 4: Quantitative evaluation and DFT calculations. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 351:124083. [PMID: 38697244 DOI: 10.1016/j.envpol.2024.124083] [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: 03/29/2024] [Revised: 04/28/2024] [Accepted: 04/29/2024] [Indexed: 05/04/2024]
Abstract
Widespread use of tetracycline (TC) results in its persistent residue and bioaccumulation in aquatic environments, posing a high toxicity to non-target organisms. In this study, a bimetal-doped composite material Ag3PO4/MIL-101(Fe,Cu) has been designed for the treatment of TC in aqueous solutions. As the molar ratio of Fe/Cu in composite is 1:1, the obtained material AP/MFe1Cu1 is placed in an aqueous environment under visible light irradiation in the presence of 3 mM peroxydisulfate (PDS), which forms a photo-Fenton-like catalytic system that can completely degrade TC (10 mg/L) within 60 min. Further, the degradation rate constant (0.0668 min-1) is 5.66 and 7.34 times higher than that of AP/MFe and AP/MCu, respectively, demonstrating a significant advantage over single metal-doped catalysts. DFT calculations confirm the strong adsorption capacity and activation advantage of PDS on the composite surface. Therefore, the continuous photogenerated electrons (e-) accelerate the activation of PDS and the production of SO4•-, resulting in the stripping of abundant photogenerated h + for TC oxidation. Meanwhile, the internal circulation of FeⅢ/FeⅡ and CuⅡ/CuⅢ in composite also greatly enhances the photo-Fenton-like catalytic stability. According to the competitive dynamic experiments, SO4•- have the greatest contribution to TC degradation (58.93%), followed by 1O2 (23.80%). The degradation intermediates (products) identified by high-performance liquid chromatography-mass spectrometry (HPLC/MS) technique indicate the involvement of various processes in TC degradation, such as dehydroxylation, deamination, N-demethylation, and ring opening. Furthermore, as the reaction proceeds, the toxicity of the intermediates produced during TC degradation gradually decreases, which can ensure the safety of the aquatic ecosystem. Overall, this work reveals the synergy mechanism of PDS catalysis and photocatalysis, as well as provides technical support for removal of TC-contaminated wastewater.
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Affiliation(s)
- Xiaojuan Chen
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China
| | - Liang Yao
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China; Xinjiang Institute of Technology, Xinjiang, 735400, China
| | - Song Xu
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China
| | - Juhua He
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China
| | - Ning Li
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China
| | - Jiaxin Li
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China
| | - Bin Liu
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China
| | - Yanping Zhu
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Xin Chen
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China
| | - Hailong Wang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528225, China; Guangdong Provincial Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650, China
| | - Runliang Zhu
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
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3
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Abbas M, Ilyas M, Hussain K, Ali T, Afzal M, Batool N, Hussain Shah N, Qasim M, Wang Y, Cui Y. Defect-engineered dual Z-scheme core-shell MoS 2/WO 3-x/AgBiS 2 for antibiotic and dyes degradation in photo and night catalysis: Mechanism and pathways. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 356:124375. [PMID: 38880327 DOI: 10.1016/j.envpol.2024.124375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Revised: 06/01/2024] [Accepted: 06/14/2024] [Indexed: 06/18/2024]
Abstract
Water pollution caused by antibiotics and synthetic dyes and imminent energy crises due to limited fossil fuel resources are issues of contemporary decades. Herein, we address them by enabling the multifunctionality in dual Z-scheme MoS2/WO3-x/AgBiS2 across photolysis, photo Fenton-like, and night catalysis. Defect, basal, and facet-engineered WO3-x is modified with MoS2 and AgBiS2, which extended its photoresponse from the UV-NIR region, inhibited carrier recombination, and reduced carrier transfer resistance. The electric field rearrangement leads to a flow of electrons from MoS2 and AgBiS2 to WO3-x and intensifies the electron population, which is crucial for night catalysis. When MoS2/WO3-x/AgBiS2 was employed against doxycycline hydrochloride (DOXH), it removed 95.65, 81.11, and 77.92 % of DOXH in 100 min during photo-Fenton (PFR), night-Fenton (NFR), and photocatalytic (PCR) reactions, respectively. It also effectively removed 91.91, 98.17, 99.01, and 98.99 % of rhodamine B (RhB), Congo red (CR), methylene blue (MB), and methylene orange (MO) in Fenton reactions, respectively. ESR analysis consolidates the ROS generation feature of MoS2/WO3-x/AgBiS2 using H2O2 with and without irradiation. This work provides a strategy to eliminate the deficiencies of WO3-x and is conducive to the evolution of applications seeking to combat environmental and energy crises.
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Affiliation(s)
- Muhammad Abbas
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
| | - Mubashar Ilyas
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry Beijing Institute of Technology Beijing, 100081, China
| | - Kashif Hussain
- College of Physics and Optoelectronic Engineering, Shenzhen University, THz Technical Research Center of Shenzhen University, Shenzhen, China
| | - Tariq Ali
- Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Muhammad Afzal
- University of Agriculture Faisalabad, Sub-campus Burewala, Pakistan
| | - Nazia Batool
- School of Natural Science Department of Physics, National University of Science and Technology (NUST), Islamabad, Pakistan
| | - Navid Hussain Shah
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
| | - Muhammad Qasim
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
| | - Yaling Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China, Beijing, 100190, China
| | - Yanyan Cui
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China.
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Sasirajan Littleflower SR, Ramakrishnan S, Hanamantrao DP, Subair L, Kumar K, Kasiviswanathan K, Vediappan K. Scalable Metal Free Zinc Ion Capattery Enabled by Interstitial Defect Engineering of Nanoscale n-Type Zinc Vanadate. J Phys Chem Lett 2024; 15:4753-4760. [PMID: 38661574 DOI: 10.1021/acs.jpclett.4c00729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
This Letter explores the energy storage properties of nano zinc vanadate in zinc metal batteries and a Zn metal free capattery. The synthesis is a simple scalable solution state mechanochemical route with uniform nanosized one-dimensional zinc vanadate. The synthesized vanadate is engineered using NMP at the electrode fabrication stage to position the Zn2+ ions at an easily extractable site. This in turn tunes the bandgap from 2.38 to 2.16 eV, creating oxygen defective vacancies in the crystal lattice. In addition, electrochemical analysis of the engineered cathode is studied in a half-cell device that is further developed into a zinc metal free zinc ion capattery (ZiC). The developed metal free capattery delivered a capacity of 120 mAh g-1 at a current density of 100 mA g-1, and a pouch cell is fabricated to power light-emitting diodes.
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Affiliation(s)
- Sajan Raj Sasirajan Littleflower
- Electrochemical Energy Storage and Conversion Laboratory (EESCL), Department of Chemistry, Faculty of Engineering and Technology SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India
| | - Saraswathi Ramakrishnan
- Electrochemical Energy Storage and Conversion Laboratory (EESCL), Department of Chemistry, Faculty of Engineering and Technology SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India
| | - Desai Prashant Hanamantrao
- Electrochemical Energy Storage and Conversion Laboratory (EESCL), Department of Chemistry, Faculty of Engineering and Technology SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India
| | - Lena Subair
- Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry 605014, India
| | - Karthick Kumar
- Electrochemical Energy Storage and Conversion Laboratory (EESCL), Department of Chemistry, Faculty of Engineering and Technology SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India
| | - Kavibharathy Kasiviswanathan
- Electrochemical Energy Storage and Conversion Laboratory (EESCL), Department of Chemistry, Faculty of Engineering and Technology SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India
| | - Kumaran Vediappan
- Electrochemical Energy Storage and Conversion Laboratory (EESCL), Department of Chemistry, Faculty of Engineering and Technology SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India
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5
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Li X, Yang Q, Yuan Y, Shama Y, Yan H. Inhibiting Photo-Oxidation and Enhancing Visible-Light-Driven Photocatalytic Water Oxidation over Covalent Organic Frameworks Through the Coordination of Cobalt with Bipyridine. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401168. [PMID: 38616769 DOI: 10.1002/smll.202401168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/20/2024] [Indexed: 04/16/2024]
Abstract
Photocatalytic water splitting using covalent organic frameworks (COFs) is a promising approach for harnessing solar energy. However, challenges such as slow kinetic dynamics in the photocatalytic oxygen evolution reaction (OER) and COFs' self-oxidation hinder its progress. In this study, an enamine-based COF coordinated is introduced with cobalt dichloride, CoCl2 (CoCl2-TpBPy). The coordination of cobalt ions with bipyridines in CoCl2-TpBPy enhances charge-carrier separation and migration, leading to effective photocatalytic OER. Under visible light irradiation, CoCl2-TpBPy achieves a notable OER rate of up to 1 mmol·g-1·h-1, surpassing the reported organic semiconductor analogs. Additionally, CoCl2-TpBPy shows minimal nitrogen evolution compared to TpBPy and ethanol-treated TpBPy (E-TpBPy), indicating cobalt plays a pivotal role in improving charge utilization and minimizing photo-oxidation. In situ X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses revealed that Co(IV) species are key to the high OER efficiency. This work highlights Co(IV) species in the efficient OER and inhibiting photo-oxidation of CoCl2-TpBPy.
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Affiliation(s)
- Xinyu Li
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
| | - Qing Yang
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
| | - Yiqi Yuan
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
| | - Yongguo Shama
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
| | - Hongjian Yan
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
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6
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Chen X, Tang Y, Xie Z, Zheng W, Lin X, Tie Y, Liang Q, Zhang Z, Liu Z, Zhao K. The engineering of defect-modified boron nitride ribbons: an effective adsorbent to rapid capture for tetracycline. RSC Adv 2024; 14:11932-11938. [PMID: 38623287 PMCID: PMC11017265 DOI: 10.1039/d4ra01941e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 04/09/2024] [Indexed: 04/17/2024] Open
Abstract
Antibiotics, the persistent organic pollutants, have brought serious pollution to the aquatic environment. Therefore, it is necessary to select rapid adsorbents to remove them from their long-term threat. Herein, the introduction of defects in BN was employed to enhance its surface chemical activity for rapid capture of tetracycline via hydrothermal and calcination methods. The defect content in BN can be controlled by adjusting the volume ratio of ethanol to water. Among them, when the volume ratio of H2O/ethanol is 4/1 (BN-3), BN-3 has the most N defects at 33%, which increases the adsorption rate of h-BN for TC and promotes the adsorption capacity to 302.15 mg g-1, which is due to the introduction of nitrogen defects significantly regulates the electronic structure of BN. The corresponding theoretical calculations confirm that BN with N defects decreases the absorption energy of BN for TC. Additionally, the adsorption removal rate of tetracycline still reached 95.5% after 5 cycles of TC adsorption by BN-3, indicating that the defect-modified BN has good reusability and is beneficial for its use in pollutant adsorption.
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Affiliation(s)
- Xi Chen
- Department of Materials Science and Engineering, Xi'an University of Technology China
- School of Material Science and Engineering, Xi'an University of Technology China
| | - Yufei Tang
- Department of Materials Science and Engineering, Xi'an University of Technology China
| | - Zhangwen Xie
- Department of Materials Science and Engineering, Xi'an University of Technology China
| | - Wanxing Zheng
- Department of Materials Science and Engineering, Xi'an University of Technology China
| | - Xiuying Lin
- Department of Materials Science and Engineering, Xi'an University of Technology China
| | - Yang Tie
- Department of Materials Science and Engineering, Xi'an University of Technology China
| | - Qian Liang
- Department of Materials Science and Engineering, Xi'an University of Technology China
| | - Zhuangzhuang Zhang
- Department of Materials Science and Engineering, Xi'an University of Technology China
| | - Zhaowei Liu
- Department of Materials Science and Engineering, Xi'an University of Technology China
| | - Kang Zhao
- Department of Materials Science and Engineering, Xi'an University of Technology China
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7
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Bai S, Lv T, Chen M, Li C, Wang Z, Yang X, Xia T. Carbon quantum dots assisted BiFeO 3@BiOBr S-scheme heterojunction enhanced peroxymonosulfate activation for the photocatalytic degradation of imidacloprid under visible light: Performance, mechanism and biotoxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 915:170029. [PMID: 38244629 DOI: 10.1016/j.scitotenv.2024.170029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/02/2024] [Accepted: 01/07/2024] [Indexed: 01/22/2024]
Abstract
A novel S-scheme heterojunction photocatalyst carbon quantum dots (CQDs)/BiFeO3/BiOBr (CBB) was synthesized via a facile hydrothermal method, which was highly effective in activating peroxymonosulfate (PMS) to photodegrade imidacloprid (IMD) (one of the typical neonicotinoid insecticides (NEOs)) under visible light irradiation. Based on the physicochemical and photoelectrochemical analysis, the super photocatalytic performance of the CBB photocatalyst was contributed to the enhanced separation and transfer of photogenerated electrons (e-) and holes (h+), the activation of PMS by reactive species, and the wider light absorption range induced by CQDs. Moreover, the intermediate products and possible photodegradation pathways of IMD were confirmed through high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS) detection and density functional theory (DFT) calculations. Although the photodegradation of IMD in the CBB/PMS/Vis system can be affected by the water quality parameters (i.e., acid group anions, pH, and the presence of humic acid (HA)), the synthesized CBB photocatalyst showed excellent photocatalytic performance in multiple natural water samples. This study provides a new idea to construct an effective and efficient heterojunction photocatalyst, which may have great advantages in photocatalytic degradation of NEOs and possibly other emerging contaminants in the aquatic environment.
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Affiliation(s)
- Sai Bai
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ting Lv
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Miaomiao Chen
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chang Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zichen Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xinyao Yang
- Key Lab of Eco-restoration of Regional Contaminated Environment (Shenyang University), Shenyang, Liaoning 110003, China
| | - Tianjiao Xia
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Lab of Eco-restoration of Regional Contaminated Environment (Shenyang University), Shenyang, Liaoning 110003, China; Key Lab of Low-carbon Green Agriculture in Northwestern China, Ministry of Agriculture and Rural Affairs, Yangling, Shaanxi 712100, China.
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8
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Li Y, Han D, Wang Z, Gu F. Double-Solvent-Induced Derivatization of Bi-MOF to Vacancy-Rich Bi 4O 5Br 2: Toward Efficient Photocatalytic Degradation of Ciprofloxacin in Water and HCHO Gas. ACS APPLIED MATERIALS & INTERFACES 2024; 16:7080-7096. [PMID: 38293772 DOI: 10.1021/acsami.3c15898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
MOF-derived photocatalytic materials have potential in degrading ciprofloxacin (CIP) in water and HCHO gas pollutants. Novel derivatization means and defect regulation are effective techniques for improving the performance of MOF-derived photocatalysis. Vacancy-rich Bi4O5Br2 (MBO-x) were derived in one step from Bi-MOF (CAU-17) by a modified double-solvent method. MBO-50 produced more oxygen vacancies due to the combined effect of the CAU-17 precursor and double solvents. The photocatalytic performance of MBO was evaluated by degrading CIP and HCHO. Thanks to the favorable morphology and vacancy structure, MBO-50 demonstrated the best photocatalytic efficiency, with 97.0% removal of CIP (20 mg L-1) and 90.1% removal of HCHO (6.5 ppm) at 60 min of light irradiation. The EIS Nyquist measurement, transient photocurrent response, photoluminescence spectra, and the calculation of energy band information indicated that the vacancy sites can effectively capture photoexcited electrons during the charge transfer process, thus limiting the recombination of electrons and holes, improving the energy band structure, and making it easier to produce superoxide anion radical (·O2-) and to degrade CIP and HCHO. The improvement of photocatalytic performance of MBO-50 in HCHO degradation due to the bromine vacancy generation and filling mechanism was discussed in detail. This work provides a promising new idea for the modulation of MOF-derived photocatalytic materials.
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Affiliation(s)
- Yansheng Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Dongmei Han
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhihua Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Fubo Gu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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9
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Parida VK, Srivastava SK, Chowdhury S, Gupta AK. Visible Light-Assisted Degradation of Sulfamethoxazole on 2D/0D Sulfur-Doped Bi 2O 3/MnO 2 Z-Scheme Heterojunction Immobilized Photocatalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:18846-18865. [PMID: 38095629 DOI: 10.1021/acs.langmuir.3c02733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
Retrieving the spent photocatalysts from the reaction system is always a challenging task. Therefore, the present work is focused on immobilizing sulfur-doped-Bi2O3/MnO2 (S-BOMO) heterojunction photocatalysts over different support matrices and evaluating their performance for the removal of sulfamethoxazole (SMX) in water under visible light. Our findings revealed S-BOMO coated clay beads (S-BOMO CCB) achieving more than 86% (240 min) SMX degradation ∼3, ∼1.3, and ∼2 times higher compared to S-BOMO coated on the different substrates, including glass beads, floating stones, and polymer material substrates, respectively. Mott-Schottky measurements confirmed the construction of the Z-scheme heterojunction involving MnO2 and 2S-Bi2O3. This Z-scheme mechanism, along with its narrow band gap of 1.58 eV, resulted in a rapid spatial transfer of the photogenerated charge carriers between the semiconductors and is believed to enhance the overall photocatalytic activity of the nanocomposite. Radical trapping and electron paramagnetic resonance results clearly established the active role of hydroxyl radicals and hydrogen peroxide in the degradation of SMX. Further, the 2S-BOMO CCB demonstrated excellent stability and photocatalytic activity over multiple runs. According to the sensitivity analysis and the results of anion effect experiments, phosphate and sulfate ions exhibit a significant impact on sulfamethoxazole degradation. Toxicity analysis revealed that 2S-BOMO CCB and sulfamethoxazole degradation byproducts were apparently innocuous. Additionally, the practical applicability of 2S-BOMO CCB was examined in various real water matrices, with the degradation efficiency followed the order: tap water < groundwater < surface water < hospital wastewater < municipal wastewater < pharmaceutical industry wastewater. The economic assessment revealed the reduction in the overall cost of the immobilized 2S-BOMO following the recovery process. Overall, the findings of this work provided critical insights into the synthesis and performance of incredibly effective and stable immobilized photocatalysts for the degradation of pharmaceutical pollutants.
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Affiliation(s)
- Vishal Kumar Parida
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | | | - Shamik Chowdhury
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Ashok Kumar Gupta
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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10
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Shi H, Wang H, Zhang E, Qu X, Li J, Zhao S, Gao H, Chen Z. Boosted Photocatalytic Performance for Antibiotics Removal with Ag/PW 12/TiO 2 Composite: Degradation Pathways and Toxicity Assessment. Molecules 2023; 28:6831. [PMID: 37836674 PMCID: PMC10574183 DOI: 10.3390/molecules28196831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/15/2023] Open
Abstract
Photocatalyst is the core of photocatalysis and directly determines photocatalytic performance. However, low quantum efficiency and low utilization of solar energy are important technical problems in the application of photocatalysis. In this work, a series of polyoxometalates (POMs) [H3PW12O40] (PW12)-doped titanium dioxide (TiO2) nanofibers modified with various amount of silver (Ag) nanoparticles (NPs) were prepared by utilizing electrospinning/photoreduction strategy, and were labelled as x wt% Ag/PW12/TiO2 (abbr. x% Ag/PT, x = 5, 10, and 15, respectively). The as-prepared materials were characterized with a series of techniques and exhibited remarkable catalytic activities for visible-light degradation tetracycline (TC), enrofloxacin (ENR), and methyl orange (MO). Particularly, the 10% Ag/PT catalyst with a specific surface area of 155.09 m2/g and an average aperture of 4.61 nm possessed the optimal photodegradation performance, with efficiencies reaching 78.19% for TC, 93.65% for ENR, and 99.29% for MO, which were significantly higher than those of PW12-free Ag/TiO2 and PT nanofibers. Additionally, various parameters (the pH of the solution, catalyst usage, and TC concentration) influencing the degradation process were investigated in detail. The optimal conditions are as follows: catalyst usage: 20 mg; TC: 20 mL of 20 ppm; pH = 7. Furthermore, the photodegradation intermediates and pathways were demonstrated by HPLC-MS measurement. We also investigated the toxicity of products generated during TC removal by employing quantitative structure-activity relationship (QSAR) prediction through a toxicity estimation software tool (T.E.S.T. Version 5.1.2.). The mechanism study showed that the doping of PW12 and the modification of Ag NPs on TiO2 broadened the visible-light absorption, accelerating the effective separation of photogenerated carriers, therefore resulting in an enhanced photocatalytic performance. The research provided some new thoughts for exploiting efficient and durable photocatalysts for environmental remediation.
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Affiliation(s)
- Hongfei Shi
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin City 132022, China; (H.W.); (E.Z.); (X.Q.); (H.G.); (Z.C.)
| | - Haoshen Wang
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin City 132022, China; (H.W.); (E.Z.); (X.Q.); (H.G.); (Z.C.)
| | - Enji Zhang
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin City 132022, China; (H.W.); (E.Z.); (X.Q.); (H.G.); (Z.C.)
| | - Xiaoshu Qu
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin City 132022, China; (H.W.); (E.Z.); (X.Q.); (H.G.); (Z.C.)
| | - Jianping Li
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin City 132022, China; (H.W.); (E.Z.); (X.Q.); (H.G.); (Z.C.)
| | - Sisi Zhao
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering, Shenyang Normal University, Shenyang 110034, China;
| | - Huajing Gao
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin City 132022, China; (H.W.); (E.Z.); (X.Q.); (H.G.); (Z.C.)
| | - Zhe Chen
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin City 132022, China; (H.W.); (E.Z.); (X.Q.); (H.G.); (Z.C.)
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