JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 1
·671-682
·
IF 2.993
Chen Yaqi,Yang Minji,Du Jinyan,Ke Gaili,Zhong Xiaohui,Zhou Yong,Dong Faqin,Bian Liang,He Huichao
Poor charge transfer and separation rate are the major bottlenecks for the activity and stability of BiVO 4 photoanode. Here, we introduced oxygen vacancies into MoO 3 /BiVO 4 heterojunction film by post-annealing the film in argon-saturated environment for improving its photoelectrochemical (PEC) water oxidation activity and stability. In comparison with the normal MoO 3 /BiVO 4 film, the MoO 3 /BiVO 4 film with oxygen vacancies is of better PEC water oxidation performance. Specifically, a higher photocurrent density of 4.1 mA/cm 2 in 0.1 M Na 2 SO 4 at 1.1 V versus SCE was achieved on the MoO 3 /BiVO 4 film with oxygen vacancies, which is about 200% improved over the normal MoO 3 /BiVO 4 film (1.83 mA cm −2 , at 1.1 V versus SCE). In addition, the MoO 3 /BiVO 4 film with oxygen vacancies shows more stable activity and faster kinetics for water oxidation, without significant activity loss for 5 h reaction at 1.23 V versus RHE. The enhanced performance on such a MoO 3 /BiVO 4 film photoanode can be attributed to that the oxygen vacancies accelerate the charge transfer and separation rate between film/electrolyte interface, and thus improve the water oxidation activity and restrain the anodic photocorrosion simultaneously.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 35
·1-11
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IF 2.8
Sui Meirong,Gu Xiuquan
In this work, a facile metal organic decomposition route was developed for synthesizing the ZnO quantum dots (QDs), which were then in situ deposited onto a BiVO 4 nanoporous films for enhancing its photoelectrochemical (PEC) water oxidization activity. The results shows that there aren’t significant changes in both the color and surface morphology of the BiVO 4 membrane after QD modification. Nevertheless, the ZnO/BiVO 4 photoanode demonstrates a maximum photocurrent density of 2.56 mA/cm 2 at a bias of 1.23 V RHE with simulated solar irradiation, which is almost 2 times higher than that of the unmodified BiVO 4 one. The enhanced PEC performance is attributed to the formation of type II heterojunction, which promotes charge transfer/separation. This work might shield light on enhancing the PEC performance of BiVO 4 towards water oxidization.
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 COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xin Xiong,Naila Arshad,Junyang Tao,Najah Alwadie,Gang Liu,Liangyou Lin,M.A.K Yousaf Shah,Muhammad Sultan Irshad,Jingwen Qian,Xianbao Wang
Desalination processes frequently require a lot of energy to generate freshwater and energy, which depletes resources. Their reliance on each other creates tension between these two vital resources. Herein, hierarchical MXene nanosheets and bismuth vanadate (Ti 3 C 2 /BiVO 4 )-derived microcapsules were synthesized for a photothermal-induced photoredox reaction for twofold applications, namely, solar-driven water evaporation and hydrogen (H 2 ) production. For this purpose, flexible aerogels were fabricated by introducing Ti 3 C 2 /BiVO 4 microcapsules in the polymeric network of natural rubber latex (NRL-Ti 3 C 2 /BiVO 4 ), and a high evaporation rate of 2.01 kg m −2 h −1 was achieved under 1-kW m −2 solar intensity. The excellent performance is attributed to the presence of Ti 3 C 2 /BiVO 4 microcapsules in the polymeric network, which provides balanced hydrophilicity and broadband sun absorption (96 %) and is aimed at plasmonic heating with microscale thermal confinement tailored by heat transfer simulations. Notably, localized plasmonic heating at the catalyst active sites of the Ti 3 C 2 /BiVO 4 heterostructure promotes enhanced photocatalytic H 2 production evolved after 4 h of reaction is 9.39 μmol, which is highly efficient than pure BiVO 4 and Ti 3 C 2 . This method turns the issue of water–fuel crisis into a collaborative connection, presenting avenues to collectively address the anticipated demand rather than fostering competition.
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
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Lianyang Zhang,Yue Meng,Tiantian Dai,Yiyang Yao,Hui Shen,Bo Xie,Zheming Ni,Shengjie Xia
The decahedral morphology of BiVO 4 and ZnCr-layered double hydroxides (LDHs) nanosheets enables the construction of a BiVO 4 @LDHs Z -scheme heterojunction (BiVO 4 as core and LDHs as a shell) for photocatalytic degradation of norfloxacin, typical antibiotic. The effects of initial concentration of norfloxacin, catalyst loading, reaction temperature, and pH value on the performance of photodegradation were studied. It was found that the removal of norfloxacin can reach 90.3% under the optimized conditions. The core-shell structure enhances the specific surface area, improves the energetic alignment of the band structures, and produces enough hydroxyl and superoxide radicals to degrade norfloxacin. Density functional theory (DFT) calculations show that a built-in electric field is formed between ZnCr-LDHs and BiVO 4 , which promotes the transfer of photogenerated electrons from the valence band of ZnCr–LDHs to the conduction band of BiVO 4 . This transfer accelerates the flow of photogenerated electrons and reduces the recombination of electron-hole pairs, so that BiVO 4 @LDHs heterojunction shows excellent photocatalytic activity for norfloxacin.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xing Cao,Huanhui Chen,Ziqian Lu,Yubin Zhao,Shoujing Wei,Ya Liu,Junrong Zeng,Gaowei Zhang,Qing Ma,Liubiao Zhong,Lijuan Song,Yejun Qiu
The industrial development of BiVO 4 photoanode–based photoelectrochemical (PEC) water splitting is constrained by the poor stability of the BiVO 4 photoanode. However, the effect of phosphorus (P) in commonly used electrolytes on BiVO 4 photoanode stability and the associated mechanism are still scarce. Herein, we investigate the effects of different P-containing electrolytes on the PEC performance of BiVO 4 , as well as the changes in the composition, microstructure, light-absorption properties, and carrier transport and separation efficiencies of BiVO 4 between before and after the reaction. Results demonstrate that at 1.23 V versus reversible hydrogen electrode (V RHE ), the photocurrent decay of BiVO 4 in all P-containing electrolytes after 24 h is >95 %. In acidic environments, H + and PO 4 3− convert BiVO 4 into BiPO 4 , with a larger band gap, resulting in decrease in PEC activity and stability. Under alkaline conditions, P deposits as a phosphorus oxide onto the BiVO 4 surface, resulting in severe carrier recombination and slower water oxidation kinetics. The 24-h photocurrent attenuation is alleviated to 33.5 % via a strategy involving low applied potential (0.8 V RHE ), introduction of labile V ions (NaVO 3 ), and deposition of a cocatalyst layer (NiOOH/FeOOH). This study emphasizes the effect of electrolyte composition on the PEC stability of BiVO 4 and provides a reference for the modification of BiVO 4 .
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Lin Yang,Yuli Xiong,Hongmei Dong,Huarong Peng,Yunhuai Zhang,Peng Xiao
Monoclinic bismuth vanadate (BiVO 4 ) is a promising semiconductor for photoelectrochemical water splitting . Here, we developed a facile fabrication of BiVO 4 double layer photoanode on the fluorine-doped tin oxide substrate by electrodeposition . The BiVO 4 double layer photoanode is composed by a dense BiVO 4 film as the inner layer and a nanoporous BiVO 4 film as the outer layer. Compared to the BiVO 4 single layer photoanode, the optimized BiVO 4 double layer photoanode produced a much higher photocurrent of 1.15 mA/cm 2 at 0.6 V vs. Ag/AgCl under AM 1.5G (100 mW/cm 2 ) illumination. The results of the photoelectric conversion kinetics for different samples revealed that the charge separation and oxidation kinetics efficiencies for the BiVO 4 double layer are 47.2% and 51.6% at 0.6 V vs. Ag/AgCl, while the values for BiVO 4 single layer are 32.3% and 35.8%, respectively. The improved photoelectrochemical performance for BiVO 4 double layer is mainly ascribed to the decrease of defect state at the interface after inserting a dense BiVO 4 as an inner layer to prevent the recombination of photogenerated electron-hole pairs.
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
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Yi Zhou,Jiaxin Li,Jin Zhang,Yongbo Chen,Tiantian Yao,Anna Chen,Minghui Xiang,Zhiyue Chen,Zhibin Wu
Dye sensitization is a pivotal method for the improvement of light utilization and electron transfer. Herein, a rhodamine B (RhB)-sensitized type Ⅱ DUT-5/BiVO 4 heterojunction was successfully synthesized. The results showed that the RhB sensitization process of DUT-5/BiVO 4 heterojunction merely affected the DUT-5 instead of BiVO 4 . SEM results showed that the regular DUT-5 nanoparticles were homogeneously dispersed on the surface of leaf-shaped BiVO 4 nanosheets. The as-fabricated samples were employed to degrade RhB and tetracycline (TC) under 300 W Xe lamp (λ ≧ 420 nm) irradiation. The RhB sensitized heterojunction showed considerably strengthened photocatalytic performance. The photodegradation efficiency of RhB sensitized BD-15% can achieve 82% for RhB after 60 min visible-light irradiation, and 71% for TC after 30 min visible-light irradiation. The dye-sensitized composites exhibit excellent photocatalytic activity ascribed to its boosted photoinduced electron transport, broadened visible-light response range and larger specific surface area. Moreover, a possible mechanism for pollutants photodegradation over RhB sensitized DUT-5/BiVO 4 was proposed.
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
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Jinyan Du,Xiaohui Zhong,Huichao He,Ji Huang,Minji Yang,Gaili Ke,Jun Wang,Yong Zhou,Faqin Dong,Qin Ren,Liang Bian
Manipulation of interfacial charge separation and transfer is one of the primary breakthroughs to improve the water oxidation activity and stability of BiVO4 photoanode. In the present work, a CoMoO4-coupled BiVO4 (BiVO4/CoMoO4) film was designed and prepared as the photoanode for photoelectrochemical (PEC) water oxidation. Compared with the bare BiVO4 film, obviously improved PEC water oxidation performance was observed on the BiVO4/CoMoO4 film. Specifically, a higher water oxidation photocurrent density of 3.04 mA/cm2 at 1.23 V versus RHE was achieved on the BiVO4/CoMoO4 photoanode, which is of about 220% improvement over bare BiVO4 photoanode (1.34 mA/cm2 at 1.23 V vs RHE). In addition, the BiVO4/CoMoO4 film photoanode was of better stability and faster hole-to-oxygen kinetics for water oxidation, without significant activity attenuation for 6 h of reaction at 0.65 V versus RHE. The enhanced water oxidation performance on the BiVO4/CoMoO4 film photoanode can be ascribed to the synergistic effect of the following factors: (i) thermodynamically, the photogenerated holes of BiVO4 are directionally transferred to CoMoO4 through their physical coupling interface and valance band potential matching; and (ii) kinetically, the transferred holes induce the formation of Co3+-active sites on CoMoO4 that could synergistically oxidize H2O to molecular O2 with stable activity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ChemCatChem
·
2020
·Vol. 12
·期 20
·5269-5275
·
IF 4.853
Lu Wang,Jinzhan Su,Liejin Guo
Graphical Water Splitting : The synergistic effect of organic dehydration in esterification and inorganic precipitation of semiconductor with surfactant was proposed as a hybrid strategy to synthesize highly uniform monodisperse BiVO 4 nanosphere. The generated water in esterification provides the reverse micelle nanoreactor to precipitate BiVO 4 cluster, which then self-assembly aggregated to be BiVO 4 nanosphere. Furthermore, different nanoporous BiVO 4 photoanodes composing of BiVO 4 nanospheres were obtained by a simple drop-casting method for photoelectrochemical water splitting. Monodisperse semiconductor sphere holds great potential for a wide variety of application as a basic building block. Herein a binary oxide, BiVO 4 , with highly uniform monodisperse nanosphere of 125 nm diameter was primarily synthesized via a hybrid method with PVP assisted in organic solvent. After investigating the function of PVP and the emergence of esterification in solvent, we proposed a formation mechanism of amorphous BiVO 4 nanosphere, including the precipitation of BiVO 4 clusters in reverse micelles and the self-assembly aggregation of BiVO 4 clusters to be BiVO 4 nanospheres. The generated water in esterification provides a nanoreactor to precipitate BiVO 4 cluster, in return, the precipitation by using water catalyzes the process of esterification in ethanol with acetic acid. This hybrid reaction of inorganic BiVO 4 precipitate and organic esterification opens a novel avenue to couple nano inorganic chemistry with organic dehydration synthesis, achieving green chemistry for sustainable development. Furthermore, highly efficient nanoporous BiVO 4 photoanodes composed of BiVO 4 nanospheres for water splitting were obtained using a simple drop-casting method and optimized for their photocurrent density by calcination temperatures. This hybrid reaction strategy could be applied to synthesize other semiconductors with nanosphere toward novel low-cost structures and devices.
研究领域:
材料科学
·
化学
·
能源科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 2
·798-807
·
IF 3.591
Jumeng Wei,Hao Wang,Chengyuan Kang,Xiangju Ye,Yuchen Wu,Bitao Liu,Changchun Song
Bismuth vanadate (BiVO4) is a promising photocatalytic material for use in environmental protection and water splitting. However, its short photogenerated carrier lifetime and narrow visible-light response restrict its extensive application. Herein, a novel electrospinning method was developed to prepare bismuth (Bi)-modified BiVO4 (Bi/BiVO4) porous nanofibers. The morphologies, structures, and chemical states of the obtained samples were characterized using a series of analytical techniques. The photocatalytic performance of the Bi/BiVO4 porous nanofibers was evaluated via the photocatalytic degradation of methylene blue (MB) under visible-light irradiation. The enhanced visible-light photocatalytic activity of Bi/BiVO4 can be attributed to the Bi nanoparticles, which exhibit a surface plasmon resonance (SPR) effect and have semiconductor character, extending the optical absorption of BiVO4 and restraining the recombination of electron–hole pairs during the photocatalytic degradation process, respectively. In this work, new insight is provided into the fabrication of a Bi/BiVO4 composite, which can act as an outstanding visible-light responsive photocatalyst, facilitating its application in the field of environmental protection.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Chade Lv,Gang Chen,Jingxue Sun,Yansong Zhou,Shuo Fan,Congmin Zhang
Heterojunction with nanosized interfacial contact stands out in promoting the transfer photoinduced interfacial carriers. Herein, a heterojunction with nanosized interfacial contact was designed by constructing BiVO 4 /Bi 4 V 2 O 11 element-copied heterojunction nanofibres. The heterojunction was formed by combining BiVO 4 nanofibres and embedded Bi 4 V 2 O 11 nanocrystals. They offered favourable interfacial contact on nanosized level. The photocatalytic performance of heterojunction nanofibres with nanosized interfacial contact were indicated to be markedly enhanced compared with that of pure BiVO 4 nanofibres. Furthermore, we also observed a 10-fold enhancement in the photocurrent intensity for the heterojunction nanofibres with nanosized interfacial contact, indicating the enhancement of photocatalytic properties was attributed to the nanosized interfacial contact with wonderful interfacial photoinduced carriers transfer behavior.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 26
·2314973
·
IF 18.5
Qian Zhang,Yifan Wang,Wenran Zhang,Xiangdong Yao,Qijie Liang
Photoelectrochemical solar to hydrogen conversion is a promising approach to solve energy and environmental problems. One of the paramount challenges to overcome is to achieve high solar to hydrogen efficiency while retaining stable service behavior without photocorrosion of the photoanode. In this study, a hydrogel-enabled dual-shielding (FeCoO x /PAAM) strategy is reported to improve efficiency and suppress photocorrosion of photoanode during solar water splitting especially in a high-intensity illumination. Anodic photocorrosion of BiVO 4 photoanodes involves the chemical and physical construction changes under the conditions of light field, electric field, and electrolyte. The utilization of FeCoO x /PAAM on BiVO 4 inhibits the improvement of oxygen evolution reaction kinetics, bubble dynamics, and blocking ion dissolution diffusion, which effectively suppresses anodic photocorrosion and simultaneously improves efficiency of BiVO 4 photoanode. The improved BiVO 4 /FeCoO x /PAAM photoanode shows a superior photocurrent density of 19.88 mA cm −2 at 1.23 V versus RHE, and a high charge separation efficiency of 98% with enhanced stability over 60 h (300 mW cm −2 ). This study contributes to developing a universal method of photoanode protection to anti-photocorrosion, facilitating the development of high-efficiency, high-stability, and pollution-free hydrogen production.
研究领域:
材料科学
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能源科学
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环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）