ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yachao Wang,Lingfang Liu,Yaxiong Wei,Xinsheng Xu,Guofeng Zhao,Rui Zhong,Cong Fu
Photocatalytic H2O2 production stands as a promising sustainable technology for chemical synthesis. However, rapid charge recombination and limited oxygen adsorption by photocatalysts often limit its efficiency. Herein, we demonstrate that the synergy of Ag and interfacial oxygen vacancies on TiO2 could overcome these challenges. The optimized Ag/TiO2-50 photocatalyst achieved an impressive H2O2 production rate of 12.9 mmol h–1 g–1 and maintained a steady-state concentration of 12.8 mM, significantly outperforming most TiO2-based photocatalysts documented in the literature. Detailed mechanistic studies, aided by TAS, in situ X-ray photoelectron spectroscopy (XPS), and in situ electron paramagnetic resonance (EPR) techniques, indicate that the oxygen vacancies at the Ag–TiO2 interface act as an interfacial hole trap, inducing a directional hole transfer. This, coupled with Ag acting as an electron acceptor, synergistically boosts the electron–hole separation. Additionally, the increased amount of oxygen vacancies at the Ag–TiO2 interface of Ag/TiO2-50 leads to enhanced O2 adsorption, thus contributing to its superior catalytic performance. This study provides valuable insights into interfacial traps in the charge transfer process and highlights the potential of interface regulation for achieving efficient photocatalytic conversion.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Lele Yang,Hong Chen,Yuntao Xu,Rong Qian,Qiao Chen,Yuanxing Fang
The efficiency of hydrogen peroxide evolution reaction (H 2 O 2 ER) by photoanodic water oxidation is normally limited by low yield and poor selectivity. In this work, the surfaces of Mo doped BiVO 4 are modified by Co 2+ and PO 4 3- ions (CPMB), which has been used as the photoanode with improved H 2 O 2 yield and selectivity. The optimal evolution rate of the CPMB is ca. 0.23 µmol·min −1 ·cm −2 , corresponding to 2.5 times to the pristine BiVO 4 photoanode, and the faradaic efficiency of CPMB photoanode for H 2 O 2 ER is ca. 26%. In this study, the mechanism for the improved H 2 O 2 evolution performance of CPMB has been investigated, indicating that PO 4 3- ions mainly promote the formation of the •OH by dissociation of H 2 O, while Co 2+ ions accelerate the conversion of the •OH for the subsequent H 2 O 2 evolution. This study offers the strategy for designing an efficient photoelectrochemical system with optimized solar conversion efficiency for H 2 O 2 production.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
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2025
·
IF 5.5
Mingming Du,Anxian Peng,Hongyue Liu,Huimei Chen,Qiyun Li,Zheng Fang,Ganning Zeng,Rongjun Yan
The well-designed internal electric field (IEF) with band bending effects will effectively accelerate the separation and transfer of photogenerated charges to foster a photocatalytic performance. Hence, in this work, the IEF-induced BiOCl/TiO2 p-n heterojunctions are prepared through the hydrothermal method for photocatalytic H2O2 production. The BiOCl/2TiO2 composite performed a superior H2O2 yield of 4.75 mM h–1, which is 4 times higher than that of pristine BiOCl. The p-n heterojunction mechanism was investigated via XPS and photoelectrochemical property tests, in which BiOCl/2TiO2 showed the highest photogenerated charge separation efficiency for boosting photocatalytic activity. This work provided an effective strategy for the design of p-n heterojunction photocatalysts to enhance photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xinyu Liu,Xiaoli Dong,Yu Wang,Jiaxin Gao,Nan Zheng,Xinxin Zhang
The photocatalytic production of H 2 O 2 using the abundant water and air on earth is promising. Herein, the flower-like polyimide/ZnIn 2 S 4 heterostructures were prepared by a simple two-step solvothermal method, where the tight interface formed between polyimide (PI) and ZnIn 2 S 4 microspheres facilitated the separation and migration of photo-generated charges. Under air condition, the photocatalytic H 2 O 2 production rate without any sacrificial agent is as high as 411.07 μmol g −1 h −1 , which is 15.4 and 3.2 times higher than that of the pristine PI and ZnIn 2 S 4 microspheres, respectively. Meanwhile, the PI/ZnIn 2 S 4 -2 has excellent reusability, and the H 2 O 2 production of PI/ZnIn 2 S 4 -2 maintained 80% of its original value after five cycles. Moreover, the as-prepared samples underwent comprehensive characterization using various techniques, and the photocatalytic mechanism was also studied in detail. Active species capture experiments showed that e − and ·O 2 − played the primary role in this reaction system. This work provides a novel idea for photocatalytic H 2 O 2 production in pure water and air.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Ya-Nan Wang,Yaxin Guo,Jinsong Peng,Jianwei Zhao,Lei Yang,Haiyan Song,Chunxia Chen
s Photocatalytic H 2 O 2 production represents a sustainable and promising avenue for energy and environment. Photoproduction of H 2 O 2 in seawater is potentially an alternative to meet the needs of H 2 O 2 utilization in ocean, while with challenges of competitive ions influence and unsolved photocatalytic mechanism. Herein, we constructed a S-scheme heterojunction with the lamellated WO 3 coated CdS semiconductors for photoproduction of H 2 O 2 in actual seawater. Fragmented WO 3 uniformly spread on surface of dispersed CdS spheres by two steps including calcination and ultrasound. Photocatalyst achieved considerable 1.00 mmol·g cat −1 ·h −1 of H 2 O 2 productivity in seawater without electron-proton donors and pure O 2 , 9.3 % of apparent quantum yield (AQY), as well as good reusability. A co-catalysis concept was proposed to explore specific role of ions in seawater on H 2 O 2 photoproduction. S-scheme heterojunction contributed to migration of electrons and holes on interface between WO 3 and CdS, and further promoted separation of photocarriers, and further opened another channel for H 2 O 2 generation. Accumulated electrons in conduction band (CB) of CdS involved in the main route of two-electron reduction of O 2 for H 2 O 2 production, also promoted generation of •O 2 - for opening the auxiliary route. WO 3 /CdS heterojunction provided fundamentals and opportunities for H 2 O 2 production and applications in abundant seawater as a sustainable way.
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
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2023
·Vol. 48
·期 5
·1998-2007
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IF 3.3
Li Feng,Hanping Fu,Tianxiang Zhang,Qing Zhang,Shufen Ren,Jiayun Cheng,Qingshuang Liang,Xiufeng Xiao
The surface properties of a photocatalyst play a pivotal role in maximizing the H2O2 generation efficiency of the photocatalyst system, especially in spurring the surface catalytic reactions and inhibiting the decomposition of H2O2. Herein, a series of Bi/BiOBr-X (X = 1, 2, and 3) photocatalysts co-modified with metal Bi and oxygen vacancies were obtained by a one-step solvothermal method using mannitol as a solvent and a reducing agent. Both Bi modification and the introduction of OVs have important influence on extending the light absorption range, enhancing charge carrier separation and suppressing the recombination of charge carriers as confirmed by UV-vis DRS, EIS, and PL characterization. Besides, the introduction of OVs can lead to an upward shift of CB minimum, which results in a stronger reduction ability of the photogenerated electrons, facilitating the reaction of the photogenerated electrons with molecular oxygen to produce superoxide ions. Meanwhile, the deposition of Bi nanoparticles on the surface of BiOBr nanosheets can significantly inhibit the decomposition of H2O2. Benefiting from the synergetic effect of Bi modification and the introduction of OVs, the as-prepared photocatalysts showed enhanced H2O2 production activity as high as 100.9 mM h−1 g−1. The present work not only marks a significant advancement in photocatalytic H2O2 production technology, but also provides a feasible idea and strategy for photocatalytic production of clean and renewable energy.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Muhua Chen,Yiping Liu,Ju Liu,Zilin Kan,Chenhui Sun,Yuqing Wang,Bo Fu,Xinbao Zhu
Recently, photocatalytic production of H 2 O 2 by semiconductors emerges as a green and potential method for green and sustainable H 2 O 2 synthesis. In this work, a g-C 3 N 4 /CAU-17 composite with heterojunction structure was fabricated. There is a tight interface contact between g-C 3 N 4 and CAU-17. And the g-C 3 N 4 nanosheets was uniformly wrapped on CAU-17 surface. In the hybrid catalyst, CAU-17 provides a high surface area for g-C 3 N 4 dispersion and the integration of g-C 3 N 4 boosts the visible light response. Results showed that the H 2 O 2 yield is 419.0 μmol . L −1. h −1 over g-C 3 N 4 /CAU-17 sample, which is 1.59 and 7.83 fold enhancements to bare g-C 3 N 4 and CAU-17 counterparts. This work sheds light on the design of CAU-17-based composite photocatalysts and provides insights into H 2 O 2 synthesis.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Haopeng Jiang,Xiaohui Yu,Jinhe Li,Lele Wang,Weikang Wang,Chunxia Wu,Liyong Tang,Qinqin Liu
Herein, a NH 2 -MIL-125(Ti)@Ag@AgCl (NM@Ag@AgCl) stacked core–shell heterojunction with Z-scheme carrier transfer mechanism was developed to fulfil the goal of synchronous reactions of CO 2 reduction and H 2 O oxidation. In detail, the NM@Ag@AgCl was obtained by in-situ loading the AgCl as the shell-inorganic semiconductor on the octahedral NM as the core-organic semiconductor, followed by in-situ transforming part of the AgCl shell into the plasmonic Ag nanoparticles using a photo-reduction method. As a result, the interface effects of core–shell architecture majorized by the Ag electronic mediator can favor the transmission of photogenerated carriers and reduce electron transport resistance; while the plasmonic Ag mediated Z-scheme mode with a giant internal electronic field provided a strong driving force to recombine the carriers with weak redox ability, reserving the carrier with strong redox ability on the NH 2 -MIL-125-core and AgCl-shell for the simultaneous reactions. The CO and H 2 O 2 yields of the optimal NM@Ag@AgCl were 6.02 and 5.43 μmol⋅g −1 ⋅h −1 , which were 3.31 and 4.02 times that of the NM, respectively. This study furnishes a novel thread for the design of core–shell organic–inorganic heterojunction with high interfacial charge transfer for realizing the simultaneous reactions.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Xiaoying Bo,Caijie Yang,Bolun Li,Yikang Fan,Jiaoyan Li,Hengming Huang,Jiahui Kou,Chunhua Lu
The photocatalytic O2 reduction to produce H2O2 offers significant environmental benefits. However, its efficiency is hindered by rapid charge recombination and sluggish catalytic kinetics in the catalyst. Traditional elemental doping has been employed to mitigate these issues, but its efficacy is limited as heteroatoms within the bulk often trap charge carriers. To address these challenges, we propose a gradient doping strategy. Unlike uniform doping, gradient doping introduces additional active sites on the catalyst surface. Our engineered gradient Mn-doped CdS photocatalyst demonstrated a remarkable H2O2 generation rate of 1874 μmol g−1 h−1, with an apparent quantum efficiency of 65.2% at 475 nm. The gradient distribution of Mn creates reverse quantum wells within the CdS matrix, which significantly enhances charge extraction from the bulk to the surface. The surface enrichment of Mn not only facilitates the adsorption and activation of O2 but also promotes the formation of the crucial *OOH intermediate, thereby accelerating H2O2 production.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guanglu Xia,Jianhao Qiu,Shengwang Gong,Dingliang Dai,Biyao Fang,Yixin Li,Jianfeng Yao
Specific intermolecular interactions are the keys to constructing benign interfacial compatibility, which determines the activities of hybrid photocatalysts. In this study, CdS/TpPa-Cl 2 /MXene hybrids were compactly developed through the mediation of chlorine groups in TpPa-Cl 2 with MXenes and CdS. Owing to the formation of the Schottky junction between TpPa-Cl 2 and MXene and the heterojunction between TpPa-Cl 2 and CdS, as well as the close interfacial contacts among them, the photogenerated electron–hole pairs are effectively separated, which ultimately results in efficient photocatalytic activities. For visible-light-driven H 2 O 2 production in ambient air and pure water, CdS/TpPa-Cl 2 /MXene hybrids could achieve a high H 2 O 2 yield of 1005 μmol·L –1 , which is 2.5, 9.7 and 6.5 times greater than those of pure TpPa-Cl 2 , MXene and CdS, respectively. The mechanism investigation revealed that an indirect O 2 reduction pathway with ·O 2 – as an intermediate occurred for H 2 O 2 production over the CdS/TpPa-Cl 2 /MXene composites, and this two-electron O 2 reduction process was manifested as the primary way. This study provides insight into the construction of multi-component composite photocatalysts with high efficiency on the basis of covalent organic frameworks.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhenzhen Wang,Yajie Zhao,Yunjie Zhou,Xiao Wang,Hui Huang,Yang Liu,Mingwang Shao,Zhenhui Kang
Achieving multi-functions integrating reaction, separation and concentration into one-step catalysis process is a great challenge. Photocatalytic H 2 O 2 generation is the cleanest and cheapest way for its production. Herein, an all-in-one photocatalytic device for H 2 O 2 generation was designed by catalysis layer with ZIF-8/C 3 N 4 composite and carbon dots-based evaporation layer (CDE). With this device, H 2 O 2 solution with high concentration is obtained, and no need for extra separation and concentration processes. Under 2 sun illumination (3 h), H 2 O 2 evolution reaches 17.13 μmol and H 2 O 2 solution concentration gets to 10.15 mmol L −1 . Mole fraction of H 2 O 2 solution obtained by all-in-one device is 1.86 times more concentrated than that of not concentrated H 2 O 2 solution. Besides, multiples devices can work concurrently to realize large-scale production and gain large amounts of H 2 O 2 solution with high concentration. Moreover, all-in-one devices can be reused at least ten cycles. The relation between the structure and performance of the photocatalysis device is further studied by COMSOL Multiphysics software and mathematical analysis. All-in-one photocatalytic device promotes H 2 O 2 photoproduction closer to the practical application due to realizing continuous production of amounts of aqueous solution of H 2 O 2 with high concentration in one-step.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 6
·1490-1500
·
IF 5.934
Yuanguo Xu,Jie Liu,Meng Xie,Wei Wei,Ting Zhou,Jia Yan,Hui Xu,Haiyan Ji,Huaming Li,Jimin Xie
In this study, NixFeyO4–BiOBr (NFB) composites with different etching degrees were successfully synthesized via a simple hydrothermal method. The etching degree was regulated by adjusting the pH during the synthesis process. The superiorities of the obtained materials can be outlined as follows: (i) BiOBr has the property of generating H2O2in situ; and (ii) NixFeyO4 nanoparticles in the composite could effectively promote the decomposition of H2O2, which proceeded via the two-electron reduction of O2 on the surface of BiOBr. The excellent properties of the prepared materials were confirmed through the photocatalytic degradation of bisphenol A under visible light irradiation, which is denoted as a solid–liquid-interfacial Fenton system. This work may pave the way for in situ H2O2 generation and decomposition; thus, the defects of traditional Fenton reaction systems, such as strict reaction conditions, high costs and secondary contamination after reactions, can be intelligently overcome.
研究领域:
环境科学
·
材料科学
✓ 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）