ELECTROCHIMICA ACTA
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2024
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IF 5.5
Shiyu Jia,Ziyang Liu,Yuanpan Gao,Ruoran Zhang,Rui Zhu,Shanshan Gao,Peipei Guan,Xuanran Geng,Ke Tian,Shouli Bai
The design of photoanode materials to achieve efficient water splitting is a current research hotspot in photoelectrochemical (PEC). In this work, we designed and prepared an α-Fe 2 O 3 /BiVO 4 heterostructure modified by carbon quantum dots ((α-Fe 2 O 3 /BiVO 4 /CQDs)) as the photoanode. The modification of CQDs can broaden the sunlight absorption ability and dramatically enhance the water oxidation kinetics of α-Fe 2 O 3 /BiVO 4 /CQDs. The optimized photoanode demonstrated a photocurrent density of 1.32 mA·cm −2 at 1.23 V vs. RHE, which is 2.2 times than pristine α-Fe 2 O 3 (0.6 mA·cm −2 ) photoanode. The IPCE value above 29.4 % at 400 nm, and the onset potential is negatively shifted by 243 mV for α-Fe 2 O 3 /BiVO 4 /CQDs. The improved performance is mainly due to the α-Fe 2 O 3 /BiVO 4 heterojunction to achieve effective separation of photogenerated carriers in the bulk phase and CQDs to improve light utilisation and OER kinetics of the photoanode.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2024
·Vol. 39
·期 4
·869-876
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IF 1.3
Zhang Yanwei,Wang Yanze,Li Junguo,Xie Jingjing,Wang Wenxuan,Fu Zhengyi
We synthesized BiVO 4 mesocrystals with ordered assembly structure, and studied the structural order and the relationship between the photodegradation of Rhodamine B. Au nanoparticles (NPs) were successfully loaded onto Meso-BiVO 4 by light-assisted induction, and Cd nanoparticles were further selected to be deposited on Au nanoparticles to form Z-scheme photocatalyst Meso-BiVO 4 -Au-CdS heterostructures. We try and propose to analyze its ordered assembly structure by XRD for the first time. The results show that Meso-BiVO 4 is a mesocrystal with highly exposed (001) plane and directional assembly structure. The charge separation efficiency of all samples was studied by PL spectroscopy. The results show that the Z-scheme Meso-BiVO 4 -Au-CdS can promote the charge separation and obtain the best carrier separation efficiency. Thus, it has the best photocatalytic activity in the experiment of photocatalytic degradation of rhodamine B. The main active species in the degradation process were confirmed by free radical trapping experiment, and the degradation mechanism was put forward.
研究领域:
材料科学
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环境科学
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光催化
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DOI
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Yaoyi Li,Kexin Chen,Xi Wang,Zijun Xiao,Gaozu Liao,Jing Wang,Xukai Li,Yiming Tang,Chun He,Laisheng Li
In this study, reduced graphene oxide (rGO) was used to fabricate a Z-scheme BiVO 4 -(rGO-Cu 2 O) photocatalyst for the degradation of Tetrabromobisphenol A (TBBPA) under sunlight irradiation. The photocatalyst was synthesized using a three-step method BiVO 4 -(rGO-Cu 2 O) photocatalyst with an rGO loading of 1% and (rGO-Cu 2 O) to BiVO 4 ratio of 50% achieved the best degradation effect for TBBPA removal. Electron paramagnetic resonance spectroscopy (EPR) confirmed that the charge transfer path of BiVO 4 -(rGO-Cu 2 O) follows that of Z-scheme photocatalysts. Moreover, the addition of rGO increases the charge transfer efficiency. High performance liquid chromatography-mass spectrometry (HPLC-MS) was used to detect and analyze intermediate products, allowing the proposal of the main degradation pathway of TBBPA. Photogenerated electrons of BiVO 4 -(rGO-Cu 2 O) were then transferred into the conduction band of Cu 2 O. Cu 2 O is located in the surface layer, which has the most effective contact area with pollutants, and therefore has a good outcome for the photocatalytic reduction of TBBPA. Photogenerated electrons (e − ) and hydroxyl radicals (∙OH) are the main factors affecting TBBPA degradation. The degradation process of TBBPA includes electron reduction debromination , hydroxylation , and β-cleavage. In our work, BiVO 4 -(rGO-Cu 2 O) was successfully synthesized to degrade TBBPA; this study brings forth a novel approach for the degradation of halogenated organic pollutants using a Z-scheme photocatalytic composite.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2025
·Vol. 51
·期 4
·2071-2088
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IF 3.5
Wu Yilin,Li Yiping,Zhang Kai,Hu Jinhai,Yan Hong
Photocatalytic CO 2 reduction technology can use sunlight to convert CO 2 into fuel or chemical raw materials, slowdown the greenhouse effect and achieve sustainable development. Therefore, we have developed a series of high-quality carbon quantum dots using alkaline lignin (AL) as the core raw material and using high efficiency hydrothermal method. Ag-BiVO 4 composite was prepared by hydrothermal method. Then, the Ag-BiVO 4 -CQDs photocatalytic composite was prepared by constant temperature water bath method. The structure and morphology of the composites were characterized by X-ray diffraction, transmission electron microscope and X-ray photoelectron spectroscopy. Through optical and electrochemical tests, it can be seen that the composite has better interfacial charge transfer and electron transport ability. In the visible light catalytic CO 2 reduction reaction, Ag-BiVO 4 can selectively reduce CO 2 to CH 4 , and the CH 4 yield is greatly improved after Ag-BiVO 4 combines with CQDs. The 3 h CH 4 yield increased from 17.64 μmol/g to 97.82 μmol/g after reduction by adding 40 mL CQDs to Ag-BiVO 4 composite, which is 5.54 times that of Ag-BiVO 4 . The results showed that the introduced CQDs were uniformly attached to Ag-BiVO 4 . As an electron transport medium, CQDs can efficiently facilitate the transfer of photogenerated carriers, suppress the recombination of electron–hole pairs, and enhance the photocatalytic performance of Ag-BiVO 4 -CQDs for CO 2 reduction.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2023
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IF 7.3
Guangmin Ren,Zehui Zhao,Zizhen Li,Zisheng Zhang,Xiangchao Meng
Herein, we applied a rapid Joule heating method to form oxygen vacancies and further induced the deposition of Ru clusters onto BiVO 4 . The rapid Joule heating method fabricated oxygen vacancy on BiVO 4 , resulting in the formation of electron-rich active Ru sites and unsaturated V sites. The pristine BiVO 4 was almost no activity in photocatalytic ammonia synthesis. The photocatalytic production rate of ammonia was increased to 3.88 μmol g - 1 h -1 after the formation of oxygen vacancies, and further increased to 16.57 μmol g -1 h -1 with Ru clusters loaded on BiVO 4 . It was indicated that unsaturated V sites near the oxygen vacancy and Ru clusters might act as the reactive sites for N 2 adsorption and activation. And the strong metal-support interactions between Ru and BiVO 4 resulted in charge redistribution between Ru clusters and BiVO 4 supports, thus reducing energy barrier of the rate-determining step for the N 2 hydrogenation. Furthermore, DFT confirmed that associative alternating pathway was suitable for this process.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
ELECTROANALYSIS
·
2016
·Vol. 29
·期 1
·305-311
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IF 2.471
Min Liu,Yu-Xiang Yu,Wei-De Zhang
In this study, a non-enzymatic hydrogen peroxide photoelectrochemical (PEC) sensor based on nanoporous BiVO 4 film electrode is fabricated by electrodeposit of nanoporous BiOI film on fluorine-doped tin oxide glass (FTO) and subsequent conversion to BiVO 4 by annealing at elevated temperature. The electrode exhibits excellent visible light photoelectrochemical activity, and H 2 O 2 works as a hole scavenger to react with light-induced electron holes on the valence band of BiVO 4 . Upon illumination and at applied bias potential of +0.2 V, the photocurrent density is linearly correlated to the concentration of H 2 O 2 . The linear determination range of H 2 O 2 is 9.54–764.76 μM with a corresponding correlation coefficient of 0.9997, a detection limit of 1.59 μM (S/N=3), and sensitivity of 182.6 μA mM −1 cm −2 . The optimum bias potential, most suitable film thickness, anti-interference performance, and impedance are also explored. The sensor shows good response towards H 2 O 2 and displays a promising prospect for non-enzyme PEC H 2 O 2 sensor.
研究领域:
分析化学
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生物医学工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
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IF 2.986
Jun Feng,Ling Cheng,Jingdong Zhang,Otieno Kevin Okoth,Fang Chen
In this work, a BiVO 4 /ZnO composite film was fabricated via a combination of the liquid phase deposition technique and the successive ionic layer adsorption and reaction (SILAR) process. Scanning electron microscopy and X-ray diffraction observations revealed that wurtzite ZnO and monoclinic BiVO 4 were successfully formed in the composite film. UV–visible spectra indicated that the formation of the BiVO 4 /ZnO film resulted in improved absorption and an obvious redshift. Photoluminescence analysis revealed that the BiVO 4 /ZnO film exhibited superior charge-transfer properties to pure ZnO and BiVO 4 films. The fabricated BiVO 4 /ZnO film was applied to the photoelectrocatalytic (PEC) degradation of tetracycline. The BiVO 4 /ZnO film showed higher visible-light PEC activity than did pure ZnO and BiVO 4 films. Moreover, the tetracycline degradation efficiency achieved by the PEC process over the BiVO 4 /ZnO film was higher than those achieved using the photolysis, electrochemical oxidation , and photocatalysis processes. The BiVO 4 /ZnO film was able to effectively remove more than 90% tetracycline when the initial concentration of tetracycline was lower than 10 mg/L.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 15
·20891-20902
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IF 2.478
Peng Long-Gui,Ni Fu-Rong,Liu Jun,Sun Meng,Chang Meng-Jie,Xi Tong,Li Hui-Lu,Du Hui-Ling,Yang Jie,Li Ying
Bismuth vanadate (BiVO 4 ) is a promising photocatalyst material for photocatalytic degradation of organic pollutions. However, the fast recombination of photo-induced charge and insufficient light absorption often lead to poor photocatalytic performance. Herein, novel fibrous BiVO 4 /CdS (BVO/CdS) heterostructures are constructed by uniformly modifying caterpillar shaped electrospun BiVO 4 nanofibers with controllable quantity of CdS nanoparticles through hydrothermal reaction. The absorption of visible light and separation efficiency of photo-generated charge of BiVO 4 are significantly promoted after the decoration of CdS nanoparticles. As a result, the photocatalytic efficiency of the optimized BVO/CdS sample (BVO/CdS-2 stands for the sample synthesized with 0.05 mmol Cd(CH 3 COO) 2 and CH 4 N 2 S) is 90.43%, which is 3.3 times as high as that of pure BiVO 4 after 180 min irradiation under visible light, respectively. Moreover, the .O 2 − and .OH are the predominant active species for the degradation process indicated by scavengers added photocatalytic experiments. Due to the simple, low-cost and controllable synthetic process, the BVO/CdS heterojunctions are suitable for practical usage.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 6
·2402-2407
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IF 3.288
Shouli Bai,Jingyi Han,Xiangxiang Fan,Jian Guo,Ruixian Luo,Dianqing Li,Aifan Chen
One-dimensional α-MoO3 nanorods were synthesized by a hydrothermal method and BiVO4 nanoparticles were grown directly onto the α-MoO3 nanorods using a simple metal organic decomposition process in order to construct an α-MoO3/BiVO4 composite with a heterojunction, for the fabrication of a rapid response triethylamine (TEA) sensor. The morphology and structure of the composite were characterized via various spectral techniques and the sensing properties of the sensor for TEA were investigated via resistance measurements. The results showed that the response of the 16Mo/Bi composite to 20 ppm TEA was 1.86 times and 15 times higher than those of α-MoO3 and BiVO4, respectively, at an optimum operating temperature of 125 °C. The enhancement can be ascribed to the existence of a heterojunction between α-MoO3 and BiVO4, creating an additional barrier at the interface of the heterojunction, and this increases the resistance of the composite in air and decreases the resistance in TEA, thus enhancing the response of the composite to TEA.
研究领域:
材料科学
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化学传感器
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纳米材料
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DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 7
·1554
·
IF 4.2
Haorui Gong,Sai An,Weilong Qin,Yongbo Kuang,Deyu Liu
In order to expand the application of bismuth vanadate (BiVO4) to the field of photoelectrochemistry, researchers have explored the potential of BiVO4in catalyzing or degrading organic substances, potentially presenting a green and eco-friendly solution. A study was conducted to investigate the impact of electrolytes on the photocatalysis of benzyl alcohol by BiVO4. The research discovered that, in an acetonitrile electrolyte (pH 9) with sodium bicarbonate, BiVO4catalyzed benzyl alcohol by introducing saturated V5+. This innovation addressed the issue of benzyl alcohol being susceptible to catalysis in an alkaline setting, as V5+was prone to dissolution in pH 9 on BiVO4. The concern of the photocorrosion of BiVO4was mitigated through two approaches. Firstly, the incorporation of a non-aqueous medium inhibited the formation of active material intermediates, reducing the susceptibility of the electrode surface to photocorrosion. Secondly, the presence of saturated V5+further deterred the leaching of V5+. Concurrently, the production of carbonate radicals by bicarbonate played a vital role in catalyzing benzyl alcohol. The results show that, in this system, BiVO4has the potential to oxidize benzyl alcohol by photocatalysis.
研究领域:
光电化学
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催化
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2020
·
IF 16.602
Meirong Huang,Zhiwei Huang,Hongwei Zhu
Solar-driven photoelectrochemical water splitting is a promising solution to energy problem. However, not-yet-available long-term stability of photoelectrodes inhibits their practical application. Introducing structure tunable, highly active and easily prepared molecular catalysts is an efficient approach to improve their stability and has recently attracted great attention. Nonetheless, the long-term stability is still challenged due to regeneration of molecular catalyst during stability test. Herein, tannic acid coordinated with Ni and Fe ions (TANF) molecular catalyst is immobilized on BiVO 4 photoanode for oxygen evolution reaction (OER). Taking advantage of the regeneration of molecular catalyst, effects of buffer species on activity, stability and regeneration of TANF/BiVO 4 photoanodes are investigated. In an optimal borate electrolyte, the TANF/BiVO 4 photoanode shows nearly no-decay after operating at harsh conditions (at 1.2 V RHE with continuous light illumination) for 62 h. The long-term stability profits from the regenerated catalyst, which is composed of a carbon conductive network with metal oxides/hydroxides as OER-active sites. This excellent stability of the integrated photoanode surpasses most of existing OEC/BiVO 4 photoanodes, and the stabilized catalyst is comparable with the state-of-the-art FeOOH/NiOOH dual-cocatalyst and ferrihydrite catalyst.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
NANO
·
2014
·
IF 1.26
SHAOFANG SUN,YAFAN WU,XIAN ZHANG,ZHONGJIE ZHANG,YAN YAN,WEISHENG GUAN
The removal of CIP from the environment has become a mandatory issue. In our paper, we have realized the visible-light-driven degradation of CIP on the BiVO 4 – Bi 2 WO 6 nano-heterojunction photocatalysts. The synthesized photocatalysts were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), ultraviolet-visible (UV-Vis) absorption spectra and photoluminescence (PL) spectra. Compared with the single-phase BiVO 4 and Bi 2 WO 6 counterparts, BiVO 4 – Bi 2 WO 6 nano-heterojunction photocatalysts show enhanced photocatalytic degradation activities in visible-light-driven CIP degradation. Particularly, when R ( Bi 2 WO 6 ∕ BiVO 4 ) = 10 wt .%, the products exhibit the highest CIP degradation ratio in 60 min of 76.8% under visible light illumination. The tentative mechanism of the interface charge transfer (IFCT) effect in the BiVO 4 – Bi 2 WO 6 heterojunction structure is also discussed by using the band position calculation.
研究领域:
环境科学
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材料科学
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光催化技术
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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）