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Zheng J, Gao Y, Wang B, Guan Z, Yin G, Zheng H, Li Y, Cao X, Zheng S. Constructing hollow core-shell Z-scheme heterojunction CdS@CoTiO 3 nanorods for enhancing the photocatalytic degradation of 2,4-DCP and TC. Phys Chem Chem Phys 2024; 26:14194-14204. [PMID: 38713135 DOI: 10.1039/d4cp01266f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Constructing Z-scheme heterojunctions incorporating an exquisite hollow structure is an effective performance regulation strategy for the realization of high quantum efficiency and a strong redox ability over photocatalysts. Herein, we report the delicate design and preparation of a core-shell hollow CdS@CoTiO3 Z-scheme heterojunction with a CdS nanoparticle (NP)-constructed outer shell supported on a CoTiO3 nanorod (NR) inner shell. The in situ growth synthetic method led to a tightly connected interface for the heterojunction between CdS and CoTiO3, which shortened the transport distance of photoinduced charges from the interface to the surface. The promoted charge carrier separation efficiency and the retained strong redox capacity caused by the Z-scheme photoinduced charge-transfer mechanism were mainly responsible for the boosted photocatalytic performance. Additionally, the well-designed core-shell structure afforded a larger interfacial area by the multiple direction contact between CdS and CoTiO3, ensuring sufficient channels for efficient charge transfer, and thus further boosting the photocatalytic activity. As an efficient photocatalyst, the optimized CdS@CoTiO3 nanohybrids displayed excellent 2,4-dichlorophenol (2,4-DCP) and tetracycline (TC) degradation efficiencies of 91.3% and 91.8%, respectively. This study presents a Z-scheme heterojunction based on ecofriendly CoTiO3, which could be valuable for the development of metal perovskite photocatalysts for application in environmental remediation, and also demonstrated the tremendous potential of integrating a Z-scheme heterojunction with the morphology design of photocatalyts.
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Affiliation(s)
- Jianhua Zheng
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China
- College of Light Industry and Textiles, Qiqihar University, Qiqihar, Heilongjiang 161006, China
- Engineering Research Center of Flax Processing Technology (Qiqihar University), Ministry of Education, Qiqihar, Heilongjiang 161006, P. R. China
| | - Yiming Gao
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China
| | - Bingbing Wang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China
| | - Zhenping Guan
- College of Mechanical and Electrical Engineering, Qiqihar University, Qiqihar 161000, China
| | - Guangming Yin
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China
| | - Heshan Zheng
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China
| | - Yong Li
- College of Light Industry and Textiles, Qiqihar University, Qiqihar, Heilongjiang 161006, China
| | - Xiangyu Cao
- College of Light Industry and Textiles, Qiqihar University, Qiqihar, Heilongjiang 161006, China
| | - Shunji Zheng
- College of Light Industry and Textiles, Qiqihar University, Qiqihar, Heilongjiang 161006, China
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Cai C, Fan G, Cao X, Luo J, He Z, Wang S, Xu KQ. Novel Ag 3PO 4/ZnWO 4-modified graphite felt electrode for photoelectrocatalytic removal of harmful algae: Performance and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134198. [PMID: 38608582 DOI: 10.1016/j.jhazmat.2024.134198] [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: 01/03/2024] [Revised: 03/24/2024] [Accepted: 03/31/2024] [Indexed: 04/14/2024]
Abstract
A novel Ag3PO4/ZnWO4-modified graphite felt electrode (AZW@GF) was prepared by drop coating method and applied to photoelectrocatalytic removal of harmful algae. Results showed that approximately 99.21% of chlorophyll a and 91.57% of Microcystin-LR (MCLR) were degraded by the AZW@GF-Pt photoelectrocatalytic system under the optimal operating conditions with a rate constant of 0.02617 min-1 and 0.01416 min-1, respectively. The calculated synergistic coefficient of photoelectrocatalytic algal removal and MC-LR degradation by the AZW@GF-Pt system was both larger than 1.9. In addition, the experiments of quenching experiments and electron spin resonance (ESR) revealed that the photoelectrocatalytic reaction mainly generated •OH and •O2- for algal removal and MC-LR degradation. Furthermore, the potential pathway for photoelectrocatalytic degradation of MC-LR was proposed. Finally, the photoelectrocatalytic cycle algae removal experiments were carried out on AZW@GF electrode, which was found to maintain the algae removal efficiency at about 91% after three cycles of use, indicating that the photoelectrocatalysis of AZW@GF electrode is an effective emergency algae removal technology.
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Affiliation(s)
- Chenjian Cai
- College of Civil Engineering, Fuzhou University, 350116 Fujian, China
| | - Gongduan Fan
- College of Civil Engineering, Fuzhou University, 350116 Fujian, China; Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, 350002, Fujian, China.
| | - Xingfeng Cao
- College of Civil Engineering, Fuzhou University, 350116 Fujian, China
| | - Jing Luo
- Fujian Jinhuang Environmental Sci-Tech Co., Ltd., 350002 Fujian, China
| | - Zhimin He
- College of Civil Engineering, Fuzhou University, 350116 Fujian, China
| | - Shichang Wang
- Fujian Provincial lnvestigation, Design & Research Institute of Water Conservancy & Hydropower Co. Ltd, 350001, Fujian, China
| | - Kai-Qin Xu
- College of Civil Engineering, Fuzhou University, 350116 Fujian, China
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Sun X, Liu G, Li R, Li L, Dai J, Yang H. Experimental and theoretical revealing of piezo-photocatalyst Bi 2O 2CO 3 for degradation of ciprofloxacin in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:7194-7213. [PMID: 38158523 DOI: 10.1007/s11356-023-31727-7] [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: 07/20/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024]
Abstract
In this report, we have attempted to experimentally and theoretically reveal a new piezo-photocatalyst Bi2O2CO3 for efficient removal of ciprofloxacin (CIP) from water. Bi2O2CO3 nanoplates were synthesized to evaluate their photocatalytic (irradiation source: simulated-sunlight), piezocatalytic (irradiation source: ultrasonic) and piezo-photocatalytic (irradiation source: simulated-sunlight and ultrasonic) performances for CIP elimination. Under the condition CCIP = 10 mg/L and Ccatalyst = 1 g/L, the piezo-photodegradation rate constant is obtained as kapp = 0.07811 min-1, which surpasses that of photocatalysis (kapp = 0.04686 min-1) and piezocatalysis (kapp = 0.01233 min-1); this phenomenon manifests an obvious piezo-enhanced photocatalytic behavior in terms of the "1 + 1 > 2" principle. The ultrasonic-induced piezoelectric behavior in Bi2O2CO3 nanoplates and involved piezo-photocatalytic mechanism were theoretically elucidated by density functional theory (DFT) and finite-element method (FEM) studies. Additionally, the effects of various factors on the CIP degradation, decomposition mechanism of CIP and toxicity of the decomposition intermediates were also analyzed.
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Affiliation(s)
- Xiaofeng Sun
- State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Guorong Liu
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Ruishan Li
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Liexiao Li
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Jianfeng Dai
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Hua Yang
- State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, China.
- School of Science, Lanzhou University of Technology, Lanzhou, 730050, China.
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Chen W, Zhang WJ, Wang K, Chang L, Yan RQ, Xiong X, Huang GB, Han DM. Oxygen Vacancy-Mediated CuWO 4/CuBi 2O 4 Samples with Efficient Charge Transfer for Enhanced Catalytic Activity toward Photodegradation of Pharmacologically Active Compounds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38018894 DOI: 10.1021/acs.langmuir.3c02408] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Photocatalytic degradation is a promising method for controlling the increasing contamination of the water environment due to pharmacologically active compounds (PHACs). Herein, oxygen vacancy (OV)-modulated Z-scheme CuWO4/CuBi2O4 hybrid systems were fabricated via thermal treatment by loading of CuWO4 nanoparticles with OVs on CuBi2O4 surfaces. The synthesized CuWO4/CuBi2O4 hybrid samples exhibited an enhanced photodegradation ability to remove PHACs under visible-light irradiation. More importantly, an optimized sample (10 wt % CuWO4/CuBi2O4) exhibited superior catalytic activity and excellent recycling stability for PHAC photodegradation. In addition, possible degradation paths for PHAC removal over the CuWO4/CuBi2O4 hybrid systems were proposed. The enhanced photocatalytic performance could be attributed to the efficient separation and transfer of photoformed charge pairs via the Z-scheme mechanism. This Z-scheme mechanism was systematically analyzed using trapping experiments of active species, ultraviolet photoelectron spectroscopy, electron spin resonance, and the photodepositions of noble metals. The findings of this study can pave the way for developing highly efficient Z-scheme photocatalytic systems for PHAC photodegradation.
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Affiliation(s)
- Wei Chen
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Wen-Jie Zhang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Kai Wang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Ling Chang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Rui-Qiang Yan
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Xianqiang Xiong
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Guo-Bo Huang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - De-Man Han
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
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Sahoo D, Tyagi S, Agarwal S, Shakya J, Ali N, Yoo WJ, Kaviraj B. Cost-Effective and Highly Efficient Manganese-Doped MoS 2 Nanosheets as Visible-Light-Driven Photocatalysts for Wastewater Treatment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:7109-7121. [PMID: 37156095 DOI: 10.1021/acs.langmuir.3c00390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
One of the main objectives in wastewater treatment and sustainable energy production is to find photocatalysts that are favorably efficient and cost-effective. Transition-metal dichalcogenides (TMDs) are promising photocatalytic materials; out of all, MoS2 is extensively studied as a cocatalyst in the TMD library due to its exceptional photocatalytic activity for the degradation of organic dyes due to its distinctive morphology, adequate optical absorption, and rich active sites. However, sulfur ions on the active edges facilitate the catalytic activity of MoS2. On the basal planes, sulfur ions are catalytically inactive. Injecting metal atoms into the MoS2 lattice is a handy approach for triggering the surface of the basal planes and enriching catalytically active sites. Effective band gap engineering, sulfur edges, and improved optical absorption of Mn-doped MoS2 nanostructures are promising for improving their charge separation and photostimulated dye degradation activity. The percentage of dye degradation of MB under visible-light irradiations was found to be 89.87 and 100% for pristine and 20% Mn-doped MoS2 in 150 and 90 min, respectively. However, the degradation of MB dye was increased when the doping concentration in MoS2 increased from 5 to 20%. The kinetic study showed that the first-order kinetic model described the photodegradation mechanism well. After four cycles, the 20% Mn-doped MoS2 catalysts maintained comparable catalytic efficacy, indicating its excellent stability. The results demonstrated that the Mn-doped MoS2 nanostructures exhibit exceptional visible-light-driven photocatalytic activity and could perform well as a catalyst for industrial wastewater treatment.
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Affiliation(s)
- Dhirendra Sahoo
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Shivam Tyagi
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Srishti Agarwal
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Jyoti Shakya
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, 10044 Stockholm, Sweden
| | - Nasir Ali
- SKKU Advanced Institute of Nano-Technology (SAINT), Sungkyunkwan University 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea
| | - Won Jong Yoo
- SKKU Advanced Institute of Nano-Technology (SAINT), Sungkyunkwan University 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea
| | - Bhaskar Kaviraj
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
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