INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Peicheng Wei,Yan Wen,Kaifeng Lin,Xin Li
Developing novel photoanodes with high efficiency for photoelectrochemical (PEC) water splitting has become the key to solar energy conversion and storage realm. Herein, 3D worm-like bismuth vanadate (BiVO 4 ) is grafted on 2D thin tungsten trioxide (WO 3 ) underlayer by electrodeposition to form mixed–dimensional structured photoanode, resulting in significant improvement of the photocatalytic performance and the charge separation efficiency. Characterization results prove that the mixed–dimensional structured can boost the photocatalytic activity by suppressing back reaction and charge recombination of the bulk BiVO 4 . Simultaneously, the electrical conductivity of photoanode can be increased by W 6+ doping. Furthermore, a robust catalyst NiCo 2 O x is coated onto the surface of WO 3 /BiVO 4 photoanode, exhibiting a desirable photocurrent of 3.85 mA cm −2 at 1.23 V vs . RHE and an excellent stability over 3 h. Both the excellent photocurrent density and great operational stability of this 2D/3D WO 3 /BiVO 4 photoanode make it a promising material for practical applications.
研究领域:
材料科学
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能源转换与存储
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
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2024
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IF 5.5
Dongxiao Wang,Zheng Lan,Yue Li,Ying Huang,Kun Yin,Lixia Yang,Liangjiu Bai,Donglei Wei,Huawei Yang,Hou Chen,Mingchuan Luo
Comprehensive Summary Photocatalytic aerobic oxidative desulfurization (PAODS) is a sustainable alternative technology to traditional, energy-intensive fuel desulfurization methods. Nonetheless, its advancement is hindered by the notable challenge of inadequate electron-hole separation efficiency within the existing catalytic systems. Herein, a Janus 2D/2D heterostructure composed of Co 3 O 4 and CoMoO 4 is reported for the PAODS of thiophenic sulfides. Through a combination of detailed experimental characterizations and density functional theory (DFT) calculations, we elucidate the formation of a type II p-n heterojunction in the catalyst, significantly enhancing electron-hole separation through electric field force and reducing the possibility of electron-hole recombination due to the spatial separation of redox centres. The photocatalyst exhibits exceptional activity and demonstrates an impressive performance of 10.4 mmol·g –1 ·h –1 in the oxidation of dibenzothiophene (DBT). Moreover, the photocatalyst demonstrates profound desulfurization capabilities in real diesel, reinforcing its promising prospects for industrial application. These discoveries provide invaluable insights, both scientifically and practically, towards the development of advanced photocatalysts for PAODS processes.
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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DOI
高影响因子
ChemElectroChem
·
2018
·Vol. 6
·期 3
·714-723
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IF 4.446
Haoyang Tian,Jintao Liang,Xuli Ma,Lele Cao,Xueyan Hu,Mengting Gao,Huimin Yang,Zhenhai Liang
Graphical Photo finish : A catalyst made of MoS 2 nanosheets loaded on Cu-doped CdS nanorods is synthesized through a facile two-step solvothermal approach. The working electrode is formed by loading a certain amount of catalyst on fluorine tin oxide. A significant increase in the photoelectrochemical performance is observed, owing to the synergistic effect between CdS and MoS 2 and fast interfacial charge transfer from the Cu 2+ doping. Transition-metal ion doping and efficient decoration by using a co-catalyst have been proven to effectively inhibit the recombination of photogenerated electron-hole pairs and broaden the visible-light response region. Here, we have constructed MoS 2 nanosheets decorated on a copper-doped CdS nanorod composite as a noble-metal-free photoelectrocatalyst. This kind of composite material was constructed through a simple solvothermal method. The morphology, structure, chemical states, photoelectrochemical properties, and other properties were tested by using a diverse range of analytical techniques. Owing to the Cu 2+ doping and the excellent electron-capturing ability of MoS 2 , 5 % MoS 2 /Cu−CdS (with 7 % Cu 2+ doping in CdS) exhibits excellent hydrogen evolution reaction with a rate of 10.18 mmol h −1 g −1 , which is about 48 times higher than that of pure CdS. A significant increase in the photoelectrochemical performance of the composite catalytic material benefits from the synergistic effect between CdS and MoS 2 and fast interfacial charge transfer, owing to the Cu 2+ doping. These findings provide a new thought for further research of the ion doping in photoelectrocatalytic field.
研究领域:
材料科学
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能源化学
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纳米技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Xianping Ye,Jian Wu,Fenghua Chen
Fabrication of low-cost, stable and highly efficient catalysts for clean energy and environmental control applications is an urgent task. In this work, we have successfully synthesized a multifunctional two-dimensional rare earth-based LaOCl@hcp-Ni heterostructure via a simple one-pot method. Here, the semiconductor LaOCl nanoparticles were well deposited on the metastable metal hcp-Ni, and the hexagonal close-packed structure of hcp-Ni matched the layered-structure LaOCl to form a highly active LaOCl@hcp-Ni Schottky catalyst. Furthermore, LaOCl@hcp-Ni were tested for Photoelectrochemical (PEC) oxygen evolution reaction (OER) in alkaline media and the photocatalytic (PC) degradation of Rhodamine B (RhB) in aqueous solution. LaOCl@hcp-Ni shows excellent PEC-OER catalytic activity and RhB degradation performance under artificial simulated sunlight. This enhancement of PEC and PC performance is due to the Schottky interface constructed by the coupling of hcp-Ni and LaOCl, which generates an interface electric field to effectively promote the transfer of photogenerated electrons from the semiconductor LaOCl to the metal hcp-Ni through the interface. Thus, energy band gap of LaOCl with oxygen defects is adjusted to the visible light region and their valence state of La is lowered, realizing high-efficiency visible light catalytic activity. Thus, it would be a potential rare earth-based Schottky catalyst, which can be used for the PEC oxygen evolution and the PC degradation of organic pollutants.
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
Solar RRL
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2024
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IF 6
Xiya Zhao,Zhiyu Li,Xiaochao Zhang,Xiushuai Guan,Changming Zhang,Puqian Tian,Huiqiang Yue,Liyuan Wang,Yadong Bai,Yawen Wang,Song Yang,Caimei Fan
Photo-anode-driven photoelectrocatalytic reduction of CO 2 is an ideal way for solving problems such as the greenhouse effect and environmental crisis. In this study, a one-step hydrothermal method was successfully used for the preparation of BiVO 4 films doped with different mass fractions of Mo. The results show that when Mo was doped at 1.5 wt%, photocurrent densities of up to 4.11 mA·cm -2 were obtained, 3.36 times greater than those of undoped BiVO 4 , and there was a marked cathodic shifting of water oxidation reaction initiation potential. Subsequently, coupling it with the BiOBr nanosheet cathode, the generated CH 3 OH rate reached 45.67 μmol·L -1 ·h -1 ·cm -2 at a low applied voltage of 1.2 V RHE , with a Faraday efficiency of 60.68% for photoelectrocatalytic CO 2 reduction. This work is important for Bi-based thin film self-assembly coupled with photoelectrocatalytic CO 2 systems. This article is protected by copyright. All rights reserved.
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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DOI
高影响因子
RSC Advances
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2017
·Vol. 7
·期 43
·26943-26951
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IF 3.108
Huajun Zheng,Ping Niu,Zhefei Zhao
Carbon quantum dot sensitized Pt@Bi2WO6/FTO electrodes (simplified as CQDs-Pt@Bi2WO6/FTO) were successfully prepared by loading platinum particles onto Bi2WO6 nanoplates via a photo-deposition method and sensitized carbon quantum dots (CQDs) via a dip-coating method. The photoelectro-catalytic properties of the Pt@Bi2WO6/FTO and CQDs-Pt@Bi2WO6/FTO electrodes for methanol oxidation were investigated. The results indicated that the CQDs-Pt@Bi2WO6/FTO electrode shows higher photoelectro-catalytic activity and better stability than that of the Pt@Bi2WO6/FTO electrode. The higher photoelectro-catalytic performance for methanol oxidation was attributed due to the special synergetic effects between the photocatalytic and electrocatalytic process under solar light irradiation. More importantly, the introduction of CQDs broaden the photoresponse range of the Bi2WO6 material and improves the mobility of the photocarriers. Meanwhile, the doped CQDs act as preferential adsorption sites for the intermediate carbonaceous species during methanol oxidation. This not only alleviates CO poisoning towards the Pt particles, but also improves the efficiency of methanol oxidation by constructing a new type of CQDs-Pt electrocatalyst. The composite material, which combines the dual function of photocatalysis and electrocatalysis will be a promising candidate for new photoelectro-catalytic fuel cells.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
He Xianhong,Tian Wei,Ahmed Jahangeer,Bai Zhengyu,Yang Lin
Bismuth vanadate (BiVO 4 , BVO) is an ideal photoabsorber for the photoelectrocatalytic water splitting, but its performance and photostability limit its commercial application. Therefore, enhancing the catalytic performance and stability becomes an increasingly crucial issue. In this study, we report a composite catalytic material poly (3,4-ethylenedioxythiophene, EDOT) (PEDOT)-modified β-FeOOH nanosheets loading onto the surface of BVO through the hydrolysis of Fe 3+ in BVO semiconductor film and the catalytic polymerization of EDOT form the conductive polymer. The structure facilitates the catalytic process, and when it is used in photoelectrocatalysis oxygen evolution reaction, it exhibits a photocurrent density of 3.3 mA cm −2 at 1.23 V versus standard hydrogen electrodes. Mechanistic studies show that the introduction of PEDOT-modified β-FeOOH optimized the electrode/electrolyte contact interface, adjusted the defect state, and provided catalytically active sites during the catalytic process. This study provides a feasible idea for exploring the catalytic mechanism of BVO-based photoelectrode and designing catalysts.
研究领域:
材料科学
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电化学
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能源转换
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产品关联
DOI
高影响因子
ACS Nano
·
2024
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IF 15.8
Chen Liao,Zhizhong He,Feng Wang,Ya Liu,Liejin Guo
Photocatalytic CO2 conversion is a promising approach to simultaneously mitigate climate change and alleviate the energy crisis. However, infrared light, which constitutes nearly half of the solar energy, has not been effectively utilized yet. In this work, we discover a photogenerated charge transition mechanism in CuInS2 with intrinsic InCu antisite defects for synergistic utilization of full-spectrum photons. Femtosecond transient absorption spectroscopy and DFT calculation unveil an intermediate band induced by the intrinsic antisite defects, where cascaded sub-band transition could be realized by high-energy photons (UV–vis) and low-energy (IR), thus improving the absorption range of infrared light as well as the utilization efficiency of photogenerated carriers. In situ Kelvin probe force microscopy demonstrates that the generation of photoexcited electrons could be greatly enhanced through this synergistic utilization of full spectrum light. Moreover, in situ X-ray photoelectron spectroscopy and in situ diffuse reflectance infrared Fourier transform spectroscopy reveal that infrared photons could also enhance the adsorption and activation of CO2 and H2O on the catalyst surface. As a result, the CO production rate under full spectrum light reaches 19.9 μmol g–1 h–1, which is more than a 7-fold increase over that under UV–vis irradiation.
研究领域:
材料科学
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环境科学
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物理化学
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产品关联
DOI
PubMed
高影响因子
ACS ES&T Engineering
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2022
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IF 0
Jiazhen Cao,Yao Chen,Hengjun Shang,Xiang Chen,Qianyu Qiao,Hexing Li,Zhenfeng Bian
Gold and palladium are the most widely used precious metal materials in the field of electronic devices and industrial catalysis. How to realize the green recycling of gold and palladium is important and challenging. In this work, we found that gold and palladium in wastes, such as electronic devices and industrial catalysts, can be completely dissolved and recycled by photocatalysis. Gold and palladium are oxidized to the ionic state in water, which does not involve strong acids, strong alkalis, toxic cyanides, or an organic medium. More interestingly, the dissolution of gold and palladium in different halogen aqueous solutions has special selectivity, which depends on the coordination stability constants between gold and palladium with halide ions. Therefore, gold and palladium can be selectively dissolved in iodine ion solution and bromine ion solution, respectively, then gold and palladium can be obtained by a one-step reduction. This work opens up a new direction for optimizing the photocatalytic dissolution technology and promoting the green recycling of precious metals.
研究领域:
环境科学
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材料科学
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DOI
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
P. Velusamy,M. Sathiya,Yunpeng Liu,Shanhu Liu,R. Ramesh Babu,Mohamed Aly Saad Aly,E. Elangovan,Haibo Chang,Liqun Mao,Ruimin Xing
A two-step thermal poly-condensation and hydrothermal method is used to prepare noble metal-free nano-heterostructure of neodymium (Nd)-doped graphitic carbon nitride (g-C 3 N 4 ) and bismuth oxyiodide (BiOI). The synthesised Nd- doped g-C 3 N 4 /BiOI heterostructure shows high electron-hole separation. Moreover, a fast charge transport at the heterojunction is noted and further leads to low charge recombination rate. Consequently, the synthesised heterostructure overcomes the high charge recombination rate of g-C 3 N 4 . This work reports the effect of Nd- doping and the formed heterojunction on the structural, optical, electrical conductivity and photoelectrochemical (PEC) properties of the heterostructure. Moreover, introducing Nd dopant into g-C 3 N 4 enhances visible light absorption of g-C 3 N 4 . The optimal hetero-nanostructure (5.0 wt% Nd doped g-C 3 N 4 /BiOI) shows high photocurrent density (15.50 mA/cm 2 ) and hydrogen evolution rate (288 μmol h −1 cm −2 ) under visible light (λ ≥ 420 nm) illumination when compared to other wt.% of Nd doped g-C 3 N 4 and heterostructure. Additionally, the low emission features obtained from the photoluminescence studies and the heterojunction visually observed by HRTEM strongly emphasise that the formation of heterostructure leads to low recombination of charge carriers. Doping and forming heterostructure is shown to be an effective, controllable and an optimal approach to improve the PEC water splitting performance of g-C 3 N 4 .
研究领域:
材料科学
·
光催化
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Dong Li,Renyi Li,Yizhou Zhao,Kaixuan Wang,Ke Fan,Wei Guo,Qi Chen,Yujing Li
Perovskite CsPbBr 3 quantum dot shows great potential in artificial photosynthesis, attributed to its outstanding optoelectronic properties. Nevertheless, its photocatalytic activity is hindered by insufficient catalytic active sites and severe charge recombination. In this work, a CsPbBr 3 @Ag-C 3 N 4 ternary heterojunction photocatalyst is designed and synthesized for high-efficiency CO 2 reduction. The CsPbBr 3 quantum dots and Ag nanoparticles are chemically anchored on the surface of g-C 3 N 4 sheets, forming an electron transfer tunnel from CsPbBr 3 quantum dots to Ag nanoparticles via g-C 3 N 4 sheets. The resulting CsPbBr 3 @Ag-C 3 N 4 ternary photocatalyst, with spatial separation of photogenerated carriers, achieves a remarkable conversion rate of 19.49 μmol·g −1 ·h −1 with almost 100 % CO selectivity, a 3.13-fold enhancement in photocatalytic activity as compared to CsPbBr 3 quantum dots. Density functional theory calculations reveal the rapid CO 2 adsorption/activation and the decreased free energy (0.66 eV) of *COOH formation at the interface of Ag nanoparticles and g-C 3 N 4 in contrast to the g-C 3 N 4 , leading to the excellent photocatalytic activity, while the thermodynamically favored CO desorption contributes to the high CO selectivity. This work presents an innovative strategy of constructing perovskite-based photocatalyst by modulating catalyst structure and offers profound insights for efficient CO 2 conversion.
研究领域:
材料科学
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催化化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Fei Wang,Guangcai Ma,Guofeng Cheng,Wenqing Hu,Zengtao Lv,Bin Chen,Wenbin Li,Yumeng Zang,Pengshan Liu,Zhuo Zhang
In this work, an efficient and stable photo-assisted electrocatalyst of N-doped CoNiOOH for overall seawater splitting are proposed. The doped N atoms triggered local contractions of lattice, thereby, promoted the morphologies of products to evolve from nanoflowers to nanowires (NWs), and the obvious electrocatalytic enhancements. Especially under the illumination of AM 1.5 G, the U30-NWs exhibited a photo-assisted cathodic current density from −2.0 to −4.0 mA cm −2 at −0.05 V vs RHE, and also an anodic stability for more than 48 hours in seawater . Our studies reveal that the doped N atom could accumulate more electrons than O atom, leading to the degradation of Co and Ni 3d and O 2p states on either side of Fermi level , thus a p-type feature with the widened band gap and improved UV–visible light absorption. Meanwhile, the corrosion resistance was thus improved due to the chemical stable N-Co(Ni)-N bonds. This work provides a practical strategy towards the H 2 production via photo-assisted electrocatalytic seawater splitting.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）