JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Yundong Zeng,Yunlan Xu,Dengjie Zhong,Haoyang Yao,Nianbing Zhong
The development of traditional photocatalytic fuel cell (PFC) is severely hindered by poor visible-light response and limited reaction space. In this study, a visible-light responsive PFC with g-C 3 N 4 /BiOI/Ti photoanode was proposed and applied to activate peroxymonosulfate (PMS) to degrade rhodamine B. The degradation rate, maximum power density and maximum photocurrent density of the PMS/PFC system were respectively 95.39%, 103.87 μW cm −2 and 0.62 mA cm −2 , which was respectively 1.28, 2.18, and 1.98 times that of PFC. The excellent performance is attributed to the production of more reactive oxygen species and the extension of the reaction space range after the activation of PMS. The activation pathway of PMS and charge transfer pathway of the photoanode were discussed in detail, and it was proposed that PMS was activated by Z-scheme heterojunction g-C 3 N 4 /BiOI/Ti photoanode.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Yundong Zeng,Yunlan Xu,Dengjie Zhong,Jiaxin Mou,Haoyang Yao,Nianbing Zhong
The development of photocatalytic fuel cell (PFC) with visible-light response is usually limited by the low efficiency of electron-hole separation in photoanode . In this work, 20%-PTh/Ag 3 PO 4 /BiOI/Ti photoanode was prepared for the first time to construct a PFC with Cu 2 O/Cu cathode to degrade rhodamine B. With visible-light stimulation, the rhodamine B degradation rate, maximum photocurrent density and maximum power density of the PFC were respectively 96.33% (2 h), 0.39 mA cm −2 and 82.20 μW cm −2 . The main active species in the PFC were proved by quenching experiments to be h + , ∙OH and ∙O − 2 . The satisfactory performance of the PFC was due to that a double Z-scheme heterojunction was formed in the photocatalyst of 20%-PTh/Ag 3 PO 4 /BiOI/Ti photoanode, which made the photogenerated electrons of Ag 3 PO 4 and BiOI directly combine with the photogenerated holes of PTh , so that the photogenerated holes of Ag 3 PO 4 and BiOI and the photogenerated electrons of PTh directly or indirectly participated in the degradation reaction of RhB. In this way, the separation efficiency of electron-hole pairs in the photoanode was improved, and the performance of the PFC was significantly enhanced.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Zhuofan Han,Dengjie Zhong,Yunlan Xu,Haixing Chang,Lin Dong,Yi Liu
In this study, based on Ag@AgCl/tubular g-C 3 N 4 (Ag@AgCl/TCN) composite, Ag nanoparticles were deposited on its surface to form Ag nanofilm enhanced composite through photoreduction of excessive silver nitrate solution to obtain Ag nanofilm Ag@AgCl/TCN photocatalyst . Finally, Ag nanofilm Ag@AgCl/TCN/Ti photoanode was successfully prepared by silica-sol drop-coating method, and assembled with Cu 2 O/Cu cathode to construct a photocatalytic fuel cell (PFC). Ag nanofilm can not only enhance the light absorption and utilization of Ag@AgCl/TCN/Ti, but also extend its light response wavelength to visible light , and be used as an electron transfer medium to reduce internal resistance. The photocurrent density and the photoconversion efficiency of the Ag nanofilm/Ag@AgCl/TCN/Ti are 8.01 mA·cm −2 and 1.24%, respectively, which are 2.49 and 2.54 times those of the Ag@AgCl/TCN/Ti photoanode, respectively. The first-order kinetic constant and the maximum power density of the Ag nanofilm-coated Ag@AgCl/TCN/Ti-Cu 2 O/Cu PFC system are 0.064 min −1 and 46.37 μW·cm −2 , respectively, which are 1.39 and 1.94 times those of the Ag@AgCl/TCN-Cu 2 O/Cu PFC system, respectively. In addition, it degraded more than 95% of rhodamine B, 72.68% of tetracycline and 54.25% of bisphenol A within 60 min. The excellent performance of Ag nanofilm/Ag@AgCl/TCN/Ti-Cu 2 O/Cu is due to the strengthening of Ag nanofilm and the formation of S-type heterojunctions between AgCl and TCN. Free radicals (•Cl, h + , •OH, •O 2 - ) and non-radicals ( 1 O 2 ) are involved in the degradation reaction of RhB degradation. It is worth noting that 6% Ag nanofilm/Ag@AgCl/TCN/Ti-Cu 2 O/Cu has a positive effect on the production of •O 2 - , and its output is approximately 1.89 times that of the Ag@AgCl/TCN/Ti-Cu 2 O/Cu. A series of material characterization experiments have been completed and possible mechanisms of operation have been proposed. This study provides a new scheme for the design and preparation of high-efficiency photoanode of PFC.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 31
·14828-14839
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IF 3.3
Lin Dong,Yunlan Xu,Dengjie Zhong,Nianbing Zhong,Zhuofan Han,Yi Liu,Haixing Chang
The low electron–hole separation in the photoanode generally restricts the visible light response of photocatalytic fuel cell (PFCs). In this study, 5% NH2-MIL-125/g-C3N4/Bi2O3/Ti photoanode was synthesized and assembled with a PFC with Cu cathode to degrade rhodamine B and generate electricity. With visible light irritation, the maximum photocurrent density, maximum power density, and degradation rate of the PFC were 0.59 mA cm−2, 29.88 μW cm−2, and 97.48% (1 h), respectively. The major active species in the PFC were h+, ˙O2−, and ˙OH. The good performance of the PFC was ascribed to the formation of a double Z-type heterojunction in the 5% NH2-MIL-125/g-C3N4/Bi2O3/Ti photoanode so that the photoelectrons of NH2-MIL-125 and Bi2O3 directly combine with the photoholes of g-C3N4, making the photoholes of NH2-MIL-125 and Bi2O3 and the photoelectrons of g-C3N4 directly or indirectly involved in the RhB degradation process and generating electricity. Thus, the separation rate of the e−–h+ pairs in the photoanode and the capability of the PFC are greatly improved.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Yongqin Liu,Yunlan Xu,Dengjie Zhong,Haoyang Yao,Yundong Zeng,Nianbing Zhong,Han Luo
In order to enhance the electron transmission rate of photocatalytic fuel cell (PFC), BiVO 4 @PDA-wt% composite was successfully prepared by hydrothermal synthesis and chemical polymerization method, and used to modify TiO 2 /Ti to obtain BiVO 4 @PDA/TiO 2 /Ti photoanode with high efficient visible light-response. The structure, morphology, optical and photoelectrochemical properties of BiVO 4 @PDA/TiO 2 /Ti photoanode were characterized and explored. BiVO 4 @PDA-10 %/TiO 2 /Ti obtained the maximum photocurrent density of 10.68 mA cm −2 at 1.0 V ( vs . SCE) under visible light illumination, which was 4.7 times that of BiVO 4 /TiO 2 /Ti. This is because of its extended π-conjugated electron system, PDA can significantly promote the charge transfer between BiVO 4 and TiO 2. Therefore, the separation of photogenerated electrons and holes in space can be realized, thereby the recombination of photogenerated electron-hole pairs can be reduced and ultimately the photocatalytic performance can be enhanced. With BiVO 4 @PDA-10 %/TiO 2 /Ti photoanode and Cu 2 O/Cu cathode, the visible-light responsive PFC exhibited high organics degradation and electricity conversion performance. Its photocurrent density, maximum power density and Rhodamine B degradation efficiency were 0.42 mA cm −2 , 58.55μW cm −2 and 97.28 %, respectively.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2023
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IF 3.9
Zhuofan Han,Dengjie Zhong,Yunlan Xu,Haixing Chang,Yi Liu,Lin Dong,Nianbing Zhong
In this research, MIL-53(Fe)@BiOBr/TCN/Ti photoanode was created using the secondary silica sol drop coating method, and assembled with Cu cathode to form photocatalytic fuel cell (PFC) to degrade rhodamine B and generate electricity. The resulting PFC has high visible light response and photocatalytic activity . It has a rhodamine B degradation efficiency of 92.19%, a maximum power density of 6.2 μW cm −2 , and a maximum photocurrent density of 0.11 mA cm −2 . Its strong photocatalysis capabilities benefits from the wider light absorption range and lower charge carrier recombination rate of the photoanode. The double Z-scheme heterojunction formed among BiOBr, MIL-53(Fe) and TCN in the composite catalyst of the photoanode provide more transfer channels for photogenerated e − and encourage the separation of e − -h + pairs. ∙OH and ∙O - 2 are the main active substances for rhodamine B degradation. This study offers a novel approach to the development of high-efficiency photoanodes for PFC.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 9
·4277-4287
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IF 3.3
Jiaxin Mou,Yunlan Xu,Dengjie Zhong,Haixing Chang,Jun Li,Chunzi Xu,Hui Wang,Hongyu Shen
To expand the optical absorption range and charge transfer efficiency of photoanode, the ZnIn2S4/PANI/TiO2/Ti photoanode was developed using a coating method and applied in a photocatalytic fuel cell (PFC) system for the removal of organic pollutants and chemical energy recovery. The prepared photoanode obtained a maximum photocurrent density of 4.19 mA cm−2 (1.2 V vs. SCE). The rhodamine B (RhB) removal efficiency, maximum power density (Pmax) and short-circuit current density (Jsc) of PFC constructed with the ZnIn2S4/PANI/TiO2/Ti composite photoanode and Cu cathode were 93.80% (1 h), 18.83 μW cm−2 and 0.26 mA cm−2, respectively. The improved photocatalytic activity of PFC was due to the outstanding photoelectric properties of the ZnIn2S4/PANI hybrid material, in which PANI, as a photosensitizer, promoted the absorption of visible light by the photoanode. The photoexcited electrons of ZnIn2S4 and PANI tend to be directly transferred to the CB of TiO2, while holes accumulate in the VB of PANI to participate in the oxidation reaction. The synergistic effect accelerates the separation of photogenerated electron–hole pairs and improves the photoelectric conversion efficiency of PFC.
研究领域:
环境科学
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材料科学
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化学工程
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电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）