CHINESE JOURNAL OF CHEMISTRY
·
2017
·Vol. 35
·期 1
·30-34
·
IF 1.852
Ling Qian,Chongwu Wang,Aiping Chen,Huagui Yang
Bismuth vanadate (BiVO 4 ) has been identified as one of the excellent visible-light-responsive photoanode for use in the photoelectrochemical water splitting. Recently intense research efforts have been devoted to the development of highly efficient BiVO 4 photoanode. Herein, we reported a low-cost and scalable method for preparing nanostructured BiVO 4 film. A much enhanced photocurrent (1.5 mA•cm −2 ) was obtained for such film, which was 6.5 times higher than that of planar film at 1.23 V [vs. RHE (Reversible Hydrogen Electrode)]. The method provides an eco-friendly, reproducible and facile way to scale up on different substrates with attractive potential.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Dan Wang,Jiangli Gu,Hanlin Wang,Mingzhuang Liu,Yichun Liu,Xintong Zhang
The sluggish surface reaction kinetic is the bottleneck limiting the photoelectrochemical (PEC) water oxidation of BiVO 4 photoanode, especially for the porous structured BiVO 4 with high surface area. Here, Co-based metal–organic frameworks (MOFs) were modified on porous BiVO 4 photoanode followed by calcining in the N 2 atmosphere, forming BiVO 4 -MOF-N 2 photoanode. The MOF-derived heterostructural cocatalysts significantly enhanced the photocurrent density of BiVO 4 -MOF-N 2 , reaching 2.32 mA·cm −2 (1.23 V vs RHE), about 1.15 times that of BiVO 4 -MOF and 2.64 times that of pristine BiVO 4 . The comparative study of BiVO 4 -MOF-N 2 , BiVO 4 -MOF, and pristine BiVO 4 photoanodes suggested that the Co-MOF-derived heterostructural cocatalyst had a much stronger effect on promoting the surface reactions than pure MOF. The BiVO 4 -MOF-N 2 photoanode had the highest charge transfer efficiency of 63.1 % at 1.3 V vs RHE and the lowest charge transfer resistivity compared with BiVO 4 and BiVO 4 -MOF. Both Co-active centers and conductive carbon matrix contributed to the enhanced charge transfer of BiVO 4 -MOF-N 2 photoanode. A MOF-loading-time dependent PEC performance of BiVO 4 photoanode also indicated that the intermediate charge transfer process from BiVO 4 to active centers strongly affected the final charge transfer and PEC performances. This work provides new insights into the design of high-performance photoelectrochemical electrodes based on heterostructural cocatalysts.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 25
·1-18
·
IF 2.8
Tang Meng,Zheng Lijia,Ge Ming
BiVO 4 photocatalysts with distinct morphology were solvothermally prepared by regulating the pH of precursor solution. The physicochemical properties of BiVO 4 catalysts were characterized using XRD, SEM, EDS, FT-IR and UV-Vis DRS. With the assistance of peroxydisulfate (PDS), as-obtained BiVO 4 could effectively degrade the cationic dye rhodamine B (RhB) and the anionic dye methyl orange (MO) under visible-LED-light illumination. RhB degradation obeys the first-order kinetic, while MO degradation complies with the second-order kinetic. Short stick-like BiVO 4 (named as BiVO 4 -1) showed the best RhB degradation efficiency, and sheet-like BiVO 4 (named as BiVO 4 -9) had the highest MO degradation rate. The influence of some important operating factors (PDS dose, BiVO 4 dosage, temperature, inorganic anions and humic acid) on the degradation of RhB and MO were discussed. In the BiVO 4 -1/PDS/Vis system, the free radical pathway (O 2 •‒ , SO 4 •‒ , •OH) and the non-radical pathway ( 1 O 2 and h + ) acted together to realize the degradation of RhB; however, in the BiVO 4 -9/PDS/Vis system, MO degradation was mainly dominated by the non-radical oxidation pathway ( 1 O 2 and h + ).
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2020
·
IF 4.966
Xin Chen,Jiabin Zhou,Yi Chen,Ying Zhou,Lidan Ding,Hong Liang,Xi Li
In this study, we synthesized CuO modified BiVO 4 composite (CuO-BiVO 4 ) and used it to construct a novel coupling system, in which two processes of photocatalysis and peroxymonosulfate (PMS) oxidation processes were integrated together to synergistic remove tetracycline hydrochloride (TC−HCl). XRD , XPS , FESEM , EDS, PL and UV–vis DRS techniques were applied for characterization of the catalyst features. CASTEP procedure of MS software was employed to calculate the electronic structure of the catalyst. The catalytic performance of CuO-BiVO 4 + Vis + PMS system was investigated under impact of different variables such as CuO loading amount, pH, PMS dosage, catalyst dosage, temperature and co-existing ions. Compared with the individual photocatalysis or peroxymonosulfate oxidation process, the catalytic performance of the coupling system was significantly improved. Under visible light irradiation, 100 mL of 80 mg/L TC−HCl solution was completely degraded using 2 mM PMS activated by a CuO-BiVO 4 composite in 50 min without adjust pH, and the system synergistic index reached 3.04. The improved catalytic activity is due to the effective separation of photogenerated electrons-holes and the availability of more activation PMS sites. After five cycling experiments, the degradation rates of TC−HCl were reduced slightly to 94 %, which indicated the catalysts exhibited excellent reusability and stability for its practical applications. Active species trapping experiments and ESR tests confirmed that SO 4 ·− ,·OH, h VB + , O 2 ·− and 1 O 2 worked together for the TC−HCl degradation. Furthermore, the possible reaction mechanism of the coupling system was proposed, and the degradation intermediates of TC−HCl were identified by LC MS. In conclusion, integration of CuO-BiVO 4 , Vis and PMS exhibited an excellent performance for TC−HCl degradation within 50 min reaction, which could be introduced as an effective and promising method for the wastewater treatment .
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hewei Yuan,Yaozhong Zhang,Yanjie Su,Nantao Hu,Jianhua Yang,Min Zeng,Zhi Yang,Yafei Zhang
Photoelectrochemical (PEC) water splitting is a promising technology to produce renewable hydrogen, which still faces problems of low photoelectric efficiency and instability. This work introduces a novel Type II heterojunction consisting of BiVO 4 thin film and diamond-like carbon (DLC) to the PEC system as a photoanode and achieves an increased PEC water-splitting activity. Compared to the pure BiVO 4 , the BiVO 4 /DLC heterojunction has an increased photocurrent density from 0.79 mA cm −2 to 2.39 mA cm −2 at 1.23 V vs RHE, and the IPCE from 4.8 % to 23.4 %. After 120 min (180 cycles) of PEC water splitting, the BiVO 4 /DLC heterojunction retains up to 82.3 % of the initial photocurrent density value, while the pure BiVO 4 has only 33.99 % remaining under the same conditions. Furthermore, the PEC system of BiVO 4 /DLC reaches the evolution rate of hydrogen of over 0.32 mmol h −1 cm −2 , which is much higher than that of its counterparts. We ascribe the enhancement in PEC performance to the Type II heterojunction photoanodes that greatly promote carrier mobility and reduce the recombination rate of electron-hole pairs. We also identify that the band bending and depletion layer are the main reasons for the decrease in charge transfer and interface resistance. It is demonstrated that the sp 2 carbon phase in DLC acts as a conductive channel to improve the separation and migration efficiency of free carriers, while the sp 3 carbon phase provides stable support and passivation effect to the photoanode, thereby leading to an enhancement for both PEC water splitting performance and the long-time stability. This work provides an effective way to improve the BiVO 4 photoanode-based PEC water-splitting systems.
研究领域:
材料科学
·
可再生能源
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 30
·期 7
·075601
·
IF 3.404
Liang Shi,Chonglei Xu,Daixun Jiang,Xun Sun,Xiaopeng Wang,Qicong Wang,Yelong Zhang,Xiaofei Qu,Fanglin Du
Heterostructured photocatalysts play a significant role in the removal of contaminants by decreasing the recombination of the photo-induced charges. Herein, we presented novel TiO2/C/BiVO4 ternary hybrids employing a 2D layered Ti3C2 MXene precursor, overcoming the lattice mismatching of TiO2/BiVO4 binary heterostructures simultaneously. Raman and XPS analyses proved the strong coupling effects of TiO2, carbon and BiVO4 components, and the heterostructures were identified from high-resolution transmission electron microscopy results. Moreover, the ternary TiO2/C/BiVO4 composites exhibit excellent photocatalytic performance of Rhodamine B degradation, which is about four times higher than pure BiVO4 and twice that of binary TiO2/BiVO4 heterostructures, reaching a reaction constant of 13.7 × 10−3 min−1 under visible-light irradiation (λ > 420 nm). In addition, for the possible mechanism for dye elimination it was proposed that RhB molecule be directly oxidized by photo-induced holes (h+) on the BiVO4 components and superoxide radical ({{{\rm{O}}}_{2}}^{\cdot -}) generated from conduction band electrons of the heterostructures. This work will provide possibilities for developing visible-light responsive nanomaterials for efficient solar utilization.
研究领域:
材料科学
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环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xuanran Geng,RenFu Zhang,Peiyun Zhang,Xiaoying Yuan,Can Yang,Yidong Hou,Jinshui Zhang,Meirong Huang
The integration of photoelectrochemical (PEC) technology with persulfate-based advanced oxidation processes has emerged as a promising approach for efficient pollutant removal in environmental remediation. Herein, we developed a novel PEC system combining a Co 3 O 4 /BiVO 4 (CO/BVO) photoanode with a CoFe 2 O 4 /carbon paper (CFO/CP) cathode for activating peroxymonosulfate (PMS) toward bisphenol A (BPA) removal. The enhanced photogenerated charge separation in CO/BVO and the PMS activation by CFO/CP in the PEC system enabled complete BPA degradation within 60 minutes under optimized conditions (1.0 V bias, 1.0 mM PMS). The influence of PMS concentration, applied bias, pH, and coexisting anions on BPA degradation was thoroughly investigated. Radical scavenging experiments combined with electron paramagnetic resonance analysis identified •SO 4 - , •OH, and photogenerated holes as dominant reactive species. The system also exhibited good stability over five consecutive cycles, with minimal metal ion leaching. This work demonstrates the potential of an efficient PEC system integrated with sulfate radical-based AOPs, offering an innovative approach for organic pollutant remediation in wastewater treatment.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 32
·1902101
·
IF 15.621
Yaping Zhang,Yang Li,Diqing Ni,Zhiwei Chen,Xiao Wang,Yuyu Bu,Jin-Ping Ao
In this work, a water splitting photoanode composed of a BiVO 4 thin film surface modified by the deposition of a rhodium (Rh)-doped SrTiO 3 perovskite is fabricated, and the Rh-doped SrTiO 3 outer layer exhibits special photoelectrochemical (PEC) oxygen evolution co-catalytic activity. Controlled intensity modulated photo-current spectroscopy, electrochemical impedance spectroscopy, and other electrochemical results indicate that the Rh on the perovskite provide an oxidation active site during the PEC water oxidation process by reducing the reaction energy barrier for water oxidation. Theoretical calculations indicate that the water oxidation reaction is more likely to occur on the (110) crystal plane of Rh-SrTiO 3 because the oxygen evolution reaction overpotential on the (110) crystal plane is reduced significantly. Therefore, the obtained BiVO 4 /Rh5%-SrTiO 3 photoanode exhibits an optimized PEC performance. In particular, it facilitates the saturation of the photocurrent density. Thus, the presence of doped Rh in SrTiO 3 can reduce the amount of noble metals required while achieving excellent and stable oxygen evolution properties.
研究领域:
材料科学
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电化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 40
·18659-18670
·
IF 3.3
Zhentao Wang,Waheed Iqbal,Jingjing Wang,Ninghui Chang,Chuanguang Qin
Degrading dye waste using inexpensive synthetic photocatalysts is intriguing since it provides the dual advantage of treating water and managing waste simultaneously. There is considerable interest in the construction of heterojunctions for their efficiency in using solar energy for the degradation of wastewater contaminants and enhancing the solar conversion efficiency. Herein, BiVO4 microspheres and 2D g-C3N4 nanosheets were used to synthesize a direct Z-scheme BiVO4/g-C3N4 heterojunction through a hydrothermal calcination approach. The distinct 0D/2D intimate contact heterostructure displayed a high interfacial area and broader visible-light absorption range together with high photoexcited charge pair mobility. Optimizing the content of the BiVO4 microspheres in the heterostructure led to the maximum efficiency for the visible-light photodegradation of rhodamine B (RhB), which was about 12.5 and 2.4 times higher than that for pure BiVO4 and g-C3N4, respectively. Moreover, the quenching effects of various scavengers demonstrated that ˙O2− and ˙OH radicals were the principal active species responsible for ameliorating the photocatalytic performance for RhB degradation. The demonstrated strategy for boosting the photocatalytic performance with Z-scheme systems may help the advancement of high-performance photocatalysts for sustainable and efficient pollutant degradation and energy applications.
研究领域:
材料科学
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环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 20
·8721-8735
·
IF 3.5
Wang Yifan,Wang Lele,Li Qi,Wu Jianning,Meng Guihua,Yang Shengchao,Liu Zhiyong,Tai Yanlong,Liu Jichang
Photocatalytic overall water splitting (POWS) is a promising route for converting solar energy into green and sustainable energy. Herein, we report a facile hydrothermal approach to fabricate polyhedron BiVO 4 by Mo and Yco-doping (MYB) photocatalysts with suitable band gap for POWS. The MYB exhibited enhanced visible light-driven POWS activities in comparison with that of as-prepared BiVO 4 , Y-BiVO 4 and M-BiVO 4 , with the maximum H 2 and O 2 evolution rate of 34.7 and 17.4 μmol·h −1 ·g −1 , respectively. The optimum activity of the catalyst was controlled by adjusting Mo content of MYB. The photodeposition of Pt shows that there are special separation reduction and oxidation centers on the surface of MYB. Electrochemical experiments further confirmed the enhanced charge separation of MYB. MYB photocatalyst has small particle size, unique polyhedral structure, large specific surface area and high (103) and (200) surface exposure, thus improving POWS performance, high electron transfer efficiency and effective separation of photogenerated electron–hole pairs. Because of the doping of Mo and Y elements, the electronic structure of the catalyst is altered, enhancing light absorption and reducing the recombination of photogenerated electron–hole pair. The current study revealed that the MYB products could serve as cost-effective and stable photocatalysts for POWS. Graphical Abstract
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Gongduan Fan,Shangwu Yang,Banghao Du,Jing Luo,Xin Lin,Xia Li
A novel FeVO 4 /BiVO 4 heterojunction photocatalyst was synthesized by hydrothermal method. The FeVO 4 /BiVO 4 nanostructures were characterized by XRD, SEM, XPS, UV–vis, and photoluminescence spectroscopy. The effects of catalyst dosage, contaminant concentration, initial hydrogen peroxide (H 2 O 2 ) concentration, and pH value on the degradation of levofloxacin were investigated and several repeated experiments were conducted to evaluate the stability and reproducibility. The optimized process parameters were used for mineralization experiments. Reactive oxygen species , degradation intermediates, and possible catalytic mechanisms were also investigated. The results showed that the sonophotocatalytic performance of the FeVO 4 /BiVO 4 heterojunction catalyst was better than that of sonocatalysis and photocatalysis . In addition, the Type II heterojunction formed by the material still had good stability in the degradation of levofloxacin after 5 cycles. The possible degradation pathway and mechanism of levofloxacin by sonophotocatalysis were put forward. This work develops new sono-photo hybrid process for potential application in the field of wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yuhuan Wang,Dengchao Wang,Shuqing Dong,Jianyu Qiao,Zhixing Zeng,Shijun Shao
Photoelectrochemical (PEC) analysis technique provides a unique route for sensitive biomolecular detection. In this paper, a novel visible-light-driven PEC sensor for detection of dopamine (DA) was fabricated based on ultrathin FeOOH cocatalyst modified nanoporous BiVO 4 photoanode. Scanning electrochemical microscopy (SECM) technique was employed to characterize the photocatalytic activities of the as-prepared photoanodes surfaces, and the first-order heterogenous electron transfer rate constants ( K eff ) were evaluated, which further revealed the photocatalytic performance of the modified photoanodes in water oxidation and the PEC sensing mechanism. A remarkable water oxidation photocurrent on the ITO/BiVO 4 /FeOOH photoanode could be achieved and served as anodic photocurrent of blank sample for PEC sensing dopamine (DA), which showed linearly range of 0.2–40 μM and 40–1400 μM with a detection limit of 0.09 μM. This method showed simplicity, high sensitivity and selectivity, high stability and wide linearity range, which provided a promising platform for the development of PEC sensor and offered an insight into the exploitation of BiVO 4 -based photolysis water materials for PEC bioanalytical purposes.
研究领域:
生物医学工程
·
材料科学与工程
✓ 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）