JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yuntao Xu,Yanfei Cao,Li Tan,Qiao Chen,Yuanxing Fang
Photoanodic hydrogen peroxide (H 2 O 2 ) production via water oxidation is limited by low yields and poor selectivity. Herein, four variations of cobalt phosphides, including pristine CoP and Co 2 P crystals, and two mixed-phase cobalt phosphides (CoP/Co 2 P) with different ratios, were applied as co-catalysts on the BiVO 4 (BVO) photoanode to improve H 2 O 2 production. The optimal yield and selectivity were approximately 9.6 µmol‧h −1 ‧cm −2 and 25.2 % at a voltage bias of 1.7 V vs reversible hydrogen electrode (V RHE ) under sunlight illumination, respectively. This performance is approximately 1.8 times that of pristine BVO photoanode. The roles of the Co and P sites were investigated. In particular, the Co site promotes the breaking of one H O bond in water to form OH • radicals, which is the rate-determining step in H 2 O 2 production. The P site plays an important role in the desorption of H 2 O 2 formed from the catalyst, which is responsible for the recovery of fresh catalytic sites. Among the four samples, Co 2 P exhibited the best performance for H 2 O 2 production because it had the highest rate of OH • formation owing to its improved accumulation property. This study offers a rational design strategy for co-catalysts for photoanodic H 2 O 2 production.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
Materials Advances
·
2024
·
IF 5.2
Catherine Afriyie,Xingwang Zhang
Photocatalytic methane conversion is a sustainable approach to transform methane under mild conditions into its value-added derivatives for the petrochemical industry. However, obtaining high productivity and selectivity of desired products still remains a great challenge. In this work, high-efficiency Fe-doped two-dimensional BiVO4 nanosheets have been synthesized and evaluated for photocatalytic methane conversion with H2O, O2 or H2O2 as the oxidizer. The Fe-doped and undoped samples were obtained by hydrothermal synthesis using 3-dodecylbenzenesulfonate (SDBS) as the morphology-directing agent, and examined by XRD, SEM, EDS, TEM, XPS, UV-DRS and BET characterization techniques. The replacement of some Bi3+ with Fe3+ was a successful approach to enhance the photoexcitation process and the adsorption properties of BiVO4, resulting in an improvement in the yield of methyl oxygenates. Complete selectivity of methyl oxygenates (CH3OH and CH3OOH) was achieved, and the yield reached 217.6 μmol gcat−1 h−1 in 2 h under visible light irradiation under mild conditions over 1.0 wt% Fe-doped BiVO4 nanosheets in the presence of H2O2, outperforming most reported studies on this reaction. This work provides new insight into the choice of a suitable oxidizer for methane conversion in the BiVO4 photocatalyst system by projecting H2O2 as the relevant oxidant.
研究领域:
材料科学
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催化化学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Zhixing Guan,Ying Zhang,Fangfang Feng,Zhaohui Li,Yanli Liu,Zifeng Wu,Xingxing Zheng,Xionghui Fu,Yuanming Zhang,Wenbin Liao,Jialu Chen,Hongguang Liu,Yi Zhu,Yongge Wei
The slow-proton-fast-electron process severely limits the catalytic efficiency of oxygen evolution reaction. A method is proposed to accelerate proton transfer by building up local electric fields. Modifying acetic, ethanedioic and propanetricarboxylic (C 6 H 8 O 6 ) ligands on BiVO 4 surface results in a potential difference between BiVO 4 and ligands that generates a local electric field which serves as a driving force for proton transfer. Among the ligands, carrying the strongest electron-withdrawing ability, the modification of C 6 H 8 O 6 forms the strongest local electric field and leads to the fastest proton transfer and the smallest thermodynamic overpotential. C 6 H 8 O 6 -BiVO 4 exhibits 3.5 times photocurrent density as high as that of pure BiVO 4 , which is 3.50 mA cm –2 at 1.23 V RHE . The onset potential of C 6 H 8 O 6 -BiVO 4 shifts negatively from 0.70 to 0.38 V RHE . The mechanism for OER transitions from thermodynamically high energy proton-coupled electron transfer to thermodynamically low energy electron transfer as proton transfer is accelerated.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yajie Bai,Jianmin Lu,Hongye Bai,Zhenyuan Fang,Fagen Wang,Ying Liu,Dongtian Sun,Bifu Luo,Weiqiang Fan,Weidong Shi
The photoelectrochemical N 2 reduction reaction (PEC NRR) is extremely charming to the synthetic ammonia (NH 3 ), for its mild operating conditions and low carbon footprint. Taking account of the strong chemical inertness of N 2 and competitive hydrogen evolution reaction, it is necessary to explore a robust and stable photoelectrocatalyst. Herein, a robust p-type BiVO 4 (p-BiVO 4 ) photocathode is firstly reported for NRR under ambient conditions. Interestingly, V sites are proved as the mainly ideal active center for N 2 adsorption/activation based on the density functional theory (DFT) calculations. The ammonia evolution rate ( V NH3 : 11.6 × 10 −8 mol h −1 cm −2 ) and Faradaic efficiency (16.2%) were obtained at −0.1 V vs. RHE in 0.1 M Li 2 SO 4 solution, outperforming most of the photoelectrocatalysts reported thus far. Moreover, the 1 H nuclear magnetic resonance result confirmed that the source of N was completely from the feeding N 2 gas. This work provided a new opportunity to tap the V-based photocathode in the field of PEC NRR.
研究领域:
材料科学
·
催化化学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Di Zhang,Juanyuan Hao,Peng Wan,Dan Zhang,Quan Sun,Zongjun Liu,Fei Li,Haitao Fang,You Wang
The rapid recombination and poor redox capability of photoinduced charge carriers seriously impede the photocatalytic activity . Herein, a direct Z-scheme photocatalyst was fabricated by selectively depositing Ag 6 Si 2 O 7 nanoparticles (NPs) on the {0 4 0} facets of BiVO 4 . Owing to the facet-dependent band structure of BiVO 4 , the photoinduced electrons and holes can be pre-separated upon photoillumination and transfer to {0 4 0} and {1 1 0} facets of BiVO 4 , respectively. A rapid combination of the separated electrons at the {0 4 0} facets of BiVO 4 with holes of the Ag 6 Si 2 O 7 NPs then takes place triggering a direct Z-scheme photocatalysis. Such a charge pre-separation triggered by the faceted BiVO 4 , together with Z-scheme at the interface warrants not only effective photoinduced charge separation but also excellent redox capability owing to the increased redox potential. The photocatalytic rate constant of the optimum BiVO 4 {0 4 0}/Ag 6 Si 2 O 7 heterostructure is 28.2 and 17.2 times higher than those of pristine BiVO 4 and Ag 6 Si 2 O 7 , respectively. This study offers a new insight for constructing direct Z-scheme photocatalysts with high degradation efficiency based on facet-controlled crystals.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
·
IF 3.014
Weibing Li,Yaping Zhang,Yuyu Bu,Zhuoyuan Chen
In this work, the BiVO 4 /BiOBr heterojunction composite was successfully prepared by a simple one-pot hydrothermal process. The formation of BiVO 4 and BiOBr and the photocatalytic performance of the prepared BiVO 4 /BiOBr composite were significantly influenced by the addition of cetyltrimethyl ammonium bromide (CTAB) and the concentration of HNO 3 used during the process of preparing BiVO 4 . Rhodamine B (RhB) can be completely degraded in 15 min by the BiVO 4 /BiOBr composite under the illumination of visible light (λ＞420 nm). The degradation efficiency of the BiVO 4 /BiOBr composite is dramatically promoted compared with that of pure BiVO 4 . The significant promotion of the photocatalytic degradation performance can be attributed to the existence of the heterojunction electric field formed on the interface between BiVO 4 and BiOBr, which significantly enhances the separation efficiency of the photogenerated electrons and holes.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xilong Yang,Yadan Luo,Jiayue Xue,Zelin Yang,Tianxu Feng,Wei Shan,Hongwen Zhang,Hua Tang
Developing high-efficiency, long-term stable photoanodes to harness solar energy for photoelectrocatalytic (PEC) glycerol oxidation into value-added chemicals is pivotal for advancing green chemistry. However, controlling selectivity while achieving high efficiency and stability poses a significant challenge in photoelectrode design. Here, a BiVO 4 /CuWO 4 (abbreviated as BVO/CWO) heterojunction photoanode was synthesized via an electrodeposition method followed by spin-coating. Under AM 1.5G illumination, the BVO/CWO photoanode achieves a glycerol oxidation current density of 1.55 mA ∙ cm −2 at 1.23 V RHE , maintaining approximately 99 % stability after a 10-hour stability test. The production rate of 1,3-dihydroxyacetone (DHA) for BVO/CWO photoanode reaches 140.3 mmol m −2 h −1 at 1.4 V RHE , representing a nearly 12-fold increase compared to CuWO 4 (12.1 mmol m −2 h −1 ), while the DHA selectivity improves to 50.1 % from 12.5 %. This enhanced performance is attributed to the heterojunction with strong interface interaction within BVO/CWO, which generates a greater photovoltage driving force and improves bulk charge transport efficiency. Introducing the BiVO 4 layer on the CuWO 4 accelerates interfacial reaction rates and inhibits the photo-corrosion of CuWO 4 in strongly acidic conditions. Furthermore, a self-powered system, PEC coupled with a photovoltaic cell (PV-PEC), is developed using a dual-electrode configuration. A PV-PEC device with the BVO/CWO photoanode achieves a DHA productivity of 186.9 mmol m −2 and an H 2 productivity of 416.4 mmol m −2 at an operating voltage of 1.5 V over 2.5 h, indicating the application potential of the BVO/CWO photoanode under more realistic conditions.
研究领域:
绿色化学
·
材料科学
·
能源转换
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 7
·4062-4072
·
IF 11.301
Chunjiang Xu,Wanjun Sun,Yinjuan Dong,Congzhao Dong,Qiyu Hu,Baochun Ma,Yong Ding
Monoclinic bismuth vanadate (BiVO4), as a rising star in light-catching materials, has been researched in many fields, such as photoelectrochemical water splitting. To date, it is still noteworthy that the photogenerated electron–hole fast recombination and the slow kinetic rate impede the photoelectrochemical performance of BiVO4. Herein, a composite material of graphene oxide (GO) and molecular Cu porphyrin (CuTCPP)-modified BiVO4-based photoanode was prepared and characterized by various relevant physical tests. The photoelectrochemical performance measurements show that the assembled CuTCPP/GO/BiVO4 photoanode has an admirable photocurrent density value, which is far better than that of pristine BiVO4. Under AM 1.5G, 100 mW cm−2 Xe lamp, the photocurrent density of the CuTCPP/GO/BiVO4 photoanode reached 5.0 mA cm−2, which was 4-fold enhancement than that of pristine BiVO4. In addition, the optimized CuTCPP/GO/BiVO4 photoanode displays an evident negative shift of the onset potential of around 400 mV, and it presents a fascinating charge injection efficiency of 92%. The fine photoelectrochemical performance is due to more active sites provided by the molecular catalyst CuTCPP and excellent electrical conductivity and fast charge separation rate offered by GO. Furthermore, GO and CuTCPP form strong conjugate systems, which effectively inhibit the photogenerated electron–hole recombination. These results offer a new concept of assembling a composite photoanode for efficient energy devices.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Hemeiling Cai,Jing Sun,Zhichang Ma,Junwei Di
An enhanced charge transfer between BiVO 4 and Au nanoparticles (AuNPs) was utilized to design a “turn-on” photoelectrochemical (PEC) biosensor for sensitive detection of target DNA. The calcination of BiVO 4 on indium tin oxide (ITO) substrate was integrated with Au nanoparticles (NPs) labelled probe DNA (pDNA-AuNPs) as photoelectrode (ITO/BiVO 4 /pDNA-AuNPs). The cathodic photocurrent increased due to the coupling BiVO 4 with AuNPs, which acted as the blank signal of this PEC platform. The probe specifically recognized and captured the target DNA (tDNA) to form double strain DNA (dsDNA) after hybridization. The photocurrent intensity of the ITO/BiVO 4 /dsDNA-AuNPs photoelectrode further increased due to the enhancement of the charge transfer between BiVO 4 and AuNPs through dsDNA chain. This photocurrent enhancement was linear proportional to the logarithm of tDNA concentration. Based on this strategy, the PEC assay displayed a linear range from 1 aM to 10 pM and the detection limit was as low as 0.2 aM (S/N = 3). It provides a promising platform for ultrasensitive target DNA detection, and thus shows a great potential in genetic disease or cancer diagnostics and infectious pathogen detection.
研究领域:
生物传感
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Xinyang Fu,Yixin Qi,Yanan Zhao,Weibing Li,Yaping Zhang
The significant carrier recombination occurring in the bulk of BiVO4 is a primary factor limiting the enhancement of its photoelectrochemical performance. To address this issue, we have incorporated two-dimensional (2D) nanosheet morphology Bi:ZnIn2S4 and Co sites onto the surface of BiVO4 to create an effective composite photoanode. According to the ultraviolet-visible diffuse reflectance spectroscopy and ultraviolet photoelectron spectroscopy results, it was inferred that a Z-scheme transfer path of charges was formed between BiVO4 and Bi:ZnIn2S4, which promoted the separation of bulk phase carriers. Additionally, the 2D topography of Bi:ZnIn2S4 also shortens the transmission distance of the carriers. Furthermore, the presence of Co sites provides more active sites for the surface hydrolysis reaction to proceed. Ultimately, under AM1.5G illumination, the photocurrent density of the BiVO4/Bi:ZnIn2S4-Co photoanode reaches 3.6 mA cm–2 at 1.23 V vs reversible hydrogen electrodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Long-Gui Peng,Hui Wang,Jun Liu,Meng Sun,Fu-Rong Ni,Meng-Jie Chang,Hui-Ling Du,Jie Yang
A novel fibrous BiVO 4 /Bi 2 S 3 /MoS 2 heterojunction is facilely constructed by simple electrospinning and hydrothermal processes. Bi 2 S 3 was formed concurrently along with the hydrothermal synthesis of MoS 2 on to the porous structure of BiVO 4 fibers. The BiVO 4 /Bi 2 S 3 /MoS 2 (BBM) heterojunction is organized with MoS 2 nanosheets of several layers in thickness encapsulating both on the Bi 2 S 3 nanorod around 40 nm in diameter and fibrous BiVO 4 template. The BiVO 4 /Bi 2 S 3 /MoS 2 heterojunction shows significant enhancement of visible light absorption in the region of 500–800 nm and photocurrent of 3 times higher than that of pure BiVO 4 . By adjusting the precursor concentration of MoS 2 , the optimized BBM-2 sample presents 4.9 and 9.5 times higher of the photodegradation efficiency and apparent reaction rate constant respectively, than that of pure BiVO 4 fibers after 120 min under visible light irradiation . The present work will provide a new strategy to the design of Bi-contained nanofibrous heterojunctions with high photocatalytic activity for the applications in energy storage and conversion.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
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
·
能源科学
✓ 已验证
DOI
高影响因子
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