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Xin J, Kong S, Zhang X, Yang Y, Wang X. Simultaneous removal of methylene blue and Cr(VI) in a dual-chamber photocatalytic microbial fuel cell with WO 3/MoS 2/FTO photocathode. Heliyon 2024; 10:e29204. [PMID: 38644858 PMCID: PMC11033111 DOI: 10.1016/j.heliyon.2024.e29204] [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: 02/07/2024] [Revised: 03/31/2024] [Accepted: 04/02/2024] [Indexed: 04/23/2024] Open
Abstract
Carbon felt was used as the anode and WO3/MoS2/FTO (fluorine-doped tin oxide) was used as the photocathode in a photocatalytic microbial fuel cell (PMFC). The photoelectric performance of the WO3/MoS2/FTO photocathode and the removal efficiency of methylene blue (MB) and Cr(VI) mixed pollutants were systematically investigated in the cathode chamber. The results showed that after 12 h of light irradiation in the PMFC with WO3/MoS2/FTO as the photocathode, the removal rates of MB and Cr(VI) were 84.56 and 68.11 %, respectively, which were much higher than those using WO3/FTO as a photocathode (55.57 % and 45.26 %, respectively). The corresponding maximum output power was 33.14 mW/m2, which was 1.85 times that of the WO3/FTO photocathode PMFC. These results can be attributed to the fact that WO3 is an n-type semiconductor and MoS2 is a p-type semiconductor. Analysis of trapping experiments showed that the composite of WO3 and MoS2 formed a Z-scheme heterojunction, which improved the separation efficiency of the photoelectric carriers and enhanced the pollutant removal efficiency of the photocathode. PMFCs are a new and environment-friendly technology for removing pollutants thereby providing an experimental basis for future engineering applications.
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Affiliation(s)
- Jiye Xin
- School of Ecology and Environment, Inner Mongolia University, 24 Zhaojun Road, Hohhot, Inner Mongolia, 010070, China
| | - Shishi Kong
- School of Ecology and Environment, Inner Mongolia University, 24 Zhaojun Road, Hohhot, Inner Mongolia, 010070, China
| | - Xiaoliang Zhang
- School of Ecology and Environment, Inner Mongolia University, 24 Zhaojun Road, Hohhot, Inner Mongolia, 010070, China
| | - Yujuan Yang
- School of Ecology and Environment, Inner Mongolia University, 24 Zhaojun Road, Hohhot, Inner Mongolia, 010070, China
| | - Xuan Wang
- School of Ecology and Environment, Inner Mongolia University, 24 Zhaojun Road, Hohhot, Inner Mongolia, 010070, China
- Key Laboratory of Environmental Pollution Control and Waste Recycling, Inner Mongolia Autonomous Region, 24 Zhaojun Road, Hohhot, Inner Mongolia, 010070, China
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Qin Y, Zhang L, Yang B, Hou R, Fu G, Huang T, Deng R, Zhang S, Meng X. Molten salt synthesis of 1T/2H mixed phase MoS 2 for boosting photocatalytic H 2 evolution via Schottky junction under EY-sensitized system. J Colloid Interface Sci 2024; 660:617-627. [PMID: 38266343 DOI: 10.1016/j.jcis.2024.01.107] [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: 12/05/2023] [Revised: 01/01/2024] [Accepted: 01/14/2024] [Indexed: 01/26/2024]
Abstract
Clean H2 fuel obtained from the photocatalytic water splitting to hydrogen reaction could efficiently alleviate current energy crisis and the concomitant environmental pollution problems. Therefore, it is desirable to search for a highly efficient photocatalytic system to decrease the energy barrier of water splitting reaction. Herein, the 1T/2H mixed phase MoS2 sample with Schottky junction between contact interfaces is developed through molten salt synthesis for photocatalytic hydrogen production under a dye-sensitized system (Eosin Y-TEOA-MoS2) driven by the visible light. In mixed phase MoS2 sample, the photogenerated electrons of 2H-phase MoS2 migrated to the 1T-phase MoS2 are difficult to jump back because of the existence of Schottky barrier, which greatly suppresses the quenching of EY and therefore results in an enhanced hydrogen evolution performance. Therefore, the optimized MoS2 sample (MoS2-350) has an initial hydrogen evolution rate of 213 μmol h-1 and corresponding apparent quantum yield of 36.1 % at 420 nm, far higher than those of pure Eosin Y. It is strongly confirmed by the steady-state/time-resolved photoluminescence (PL) spectra and transient photocurrent response experiments. With the assistance of Density functional theory (DFT) calculation, the function of Schottky junction in photocatalytic hydrogen evolution reaction is well explained. In addition, a new and universal method (SVM curve) of judging oxidation or reduction quenching for photosensitizers is proposed.
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Affiliation(s)
- Yibo Qin
- School of Chemistry & Chemical Engineering, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Leilei Zhang
- Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan 450006, China
| | - Baocheng Yang
- Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan 450006, China
| | - Ruipeng Hou
- Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan 450006, China
| | - Gaoliang Fu
- Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan 450006, China
| | - Tengfei Huang
- Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan 450006, China
| | - Ruixue Deng
- School of Chemistry & Chemical Engineering, Henan University of Science and Technology, Luoyang, Henan 471023, China.
| | - Shouren Zhang
- Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan 450006, China.
| | - Xiangyu Meng
- Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan 450006, China.
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Das S, Acharya L, Biswal L, Parida K. Augmented photocatalysis induced by 1T-MoS 2 bridged 2D/2D MgIn 2S 4@1T/2H-MoS 2 Z-scheme heterojunction: mechanistic insights into H 2O 2 and H 2 evolution. NANOSCALE ADVANCES 2024; 6:934-946. [PMID: 38298579 PMCID: PMC10825931 DOI: 10.1039/d3na00912b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 12/24/2023] [Indexed: 02/02/2024]
Abstract
In the realm of composite photocatalysts, the fusion of the co-catalyst effect with interfacial engineering is recognized as a potent strategy for facilitating the segregation and migration of photo-induced charge carriers. Herein, an innovative mediator-based Z-scheme hybrid, i.e. MIS@1T/2H-MoS2, has been well designed by pairing MIS with 1T/2H-MoS2via a facile hydrothermal strategy as a competent photocatalyst for H2O2 and H2 generation. The co-catalyst, i.e. metallic 1T-phase bridging between semiconducting 2H-MoS2 and MIS, serves as a solid state electron mediator in the heterostructure. Morphological findings revealed the growth of 1T/2H-MoS2 nanoflowers over MIS microflowers, verifying the close interaction between MIS and 1T/2H-MoS2. By virtue of accelerated e-/h+ pair separation and migration efficiency along with a proliferated density of active sites, the MMoS2-30 photocatalyst yields an optimum H2O2 of 35 μmol h-1 and H2 of 370 μmol h-1 (ACE of 5.9%), which is 3 and 2.7 fold higher than pristine MIS. This obvious enhancement can be attributed to photoluminescence and electrochemical aspects that substantiate the diminished charge transfer resistance along with improved charge carrier separation, representing a good example of a noble metal-free photocatalyst. The proposed Z-scheme charge transfer mechanism is aided by time-resolved photoluminescence (TRPL), XPS, radical trapping experiments, and EPR analysis. Overall, this endeavour provides advanced insights into the architecture of noble metal-free Z-scheme heterostructures, offering promising prospects in photocatalytic applications.
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Affiliation(s)
- Sarmistha Das
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University Bhubaneswar-751030 India +91-674-2350642 +91-674-2351777
| | - Lopamudra Acharya
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University Bhubaneswar-751030 India +91-674-2350642 +91-674-2351777
| | - Lijarani Biswal
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University Bhubaneswar-751030 India +91-674-2350642 +91-674-2351777
| | - Kulamani Parida
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University Bhubaneswar-751030 India +91-674-2350642 +91-674-2351777
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Liu D, Zhao C, Li C, Jia J, Chen M, Pan L, Bai Y, Wu W, Ni T. Facile fabrication of 3D hollow porous aminopyridine rings decorated polymeric carbon nitride for enhanced photocatalytic hydrogen evolution and dye elimination. J Colloid Interface Sci 2023; 649:334-343. [PMID: 37352564 DOI: 10.1016/j.jcis.2023.06.128] [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: 02/01/2023] [Revised: 06/13/2023] [Accepted: 06/18/2023] [Indexed: 06/25/2023]
Abstract
In consideration of energy shortages and environmental pollution, there is a critical need to develop a photocatalyst with high catalytic performance for rapid hydrogen production and efficient pollutant degradation. We synthesized a photocatalytic composite catalyst with three-dimensional (3D) porous aminopyridine rings grafted on the edge of g-C3N4 (APCN) using melamine, cyanuric acid and 4-aminopyridine as raw materials. The composite catalyst exhibited excellent photocatalytic performance for H2 production (2.44 mmol g-1h-1) and RhB degradation (97.08%) under visible light. Subsequently, a possible enhanced mechanism of the catalyst was proposed on the basis of a series of characterization and photocatalytic experiments. The 3D porous structure not only enhanced the structural stability but also increased the surface area of the APCN catalysts, which generated more exposed active sites. Moreover, the aminopyridine ring embellishment was beneficial for achieving a narrowed bandgap and charge migration and separation, which decreased the occurrence of photogenerated carrier recombination. In summary, these two structural features showed a synergistic effect to enhance the photocatalytic performance of the APCN catalyst. Finally, an integrated feasible enhanced mechanism of photocatalytic activity was elucidated according to the results of active substance capture tests, showing that O2•- played an important role during RhB degradation.
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Affiliation(s)
- Dong Liu
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China.
| | - Congyue Zhao
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Chunling Li
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Jiaojiao Jia
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Minghui Chen
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Likun Pan
- Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
| | - Yichun Bai
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Weidong Wu
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Tianjun Ni
- School of Basic Medical Science, Xinxiang Medical University, Xinxiang 453003, China.
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Zhang Y, Li H, Zhang X, Zhang H, Zhang W, Huang H, Ou H, Zhang Y. Enhanced adsorption and photocatalytic Cr(VI) reduction and sterilization of defective MoS2/PVP. J Colloid Interface Sci 2023; 630:742-753. [DOI: 10.1016/j.jcis.2022.10.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 10/06/2022] [Accepted: 10/16/2022] [Indexed: 11/06/2022]
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Design strategy for MXene and metal chalcogenides/oxides hybrids for supercapacitors, secondary batteries and electro/photocatalysis. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214544] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Ding L, Wang LJ, Liu RY, Li YF, Sun HZ. Carbon nitride based Schottky junction with a Ni–Mo synergistic interaction for highly efficient photocatalytic hydrogen production. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00792d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A CN/3NiMoP2 Schottky junction with a Ni–Mo synergistic interaction demonstrates a comparable photocatalytic HER performance to CN/3 wt% Pt and satisfactory stability.
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Affiliation(s)
- Lei Ding
- National and Local United Engineering Laboratory for Power Batteries, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Li-Jing Wang
- Henan Engineering Center of New Energy Battery Materials, Henan D&A Engineering Center of Advanced Battery Materials, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, China
| | - Ru-Yi Liu
- National and Local United Engineering Laboratory for Power Batteries, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yan-Fei Li
- National and Local United Engineering Laboratory for Power Batteries, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Hai-Zhu Sun
- National and Local United Engineering Laboratory for Power Batteries, College of Chemistry, Northeast Normal University, Changchun 130024, China
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Xu F, Yan J, Chai B, Fan G, Song G. Iron-doped g-C 3N 4 catalysts fabricated by forming Fe–N moieties with outstanding photo-Fenton activity toward tetracycline degradation. NEW J CHEM 2022. [DOI: 10.1039/d2nj03175b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Porous Fe-doped g-C3N4 photo-Fenton catalysts are successfully prepared by a convenient one-step pyrolysis strategy and applied in the degradation of tetracycline hydrochloride.
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Affiliation(s)
- Fang Xu
- School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China
| | - Juntao Yan
- School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China
| | - Bo Chai
- School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China
| | - Guozhi Fan
- School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China
| | - Guangsen Song
- School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China
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