SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Shuhe Hu,Yanwei Xiao,Ao Zhang,Zhen Lin,Feng Li,Bingxue Zhang,Guibin Wang,Fengdong Qu,Dong Yao,Hao Zhang
Two-dimensional (2D) BiVO 4 nanosheets (NSs), featuring distinctive chemical properties and dangling-bond-rich surfaces, are promising for developing high-performance gas sensors. However, the previously reported 2D BiVO 4 NSs-based devices suffer from a low responsivity and poor selectivity. In this work, we introduce RuO 2 nanoparticles to boost the gas sensing properties of 2D BiVO 4 NSs-based sensor. Intriguingly, the RuO 2 -decoration changes the selectivity of the corresponding gas sensor from acetone to xylene. Compared to the pristine BiVO 4 sensor, the RuO 2 -BiVO 4 sensor displays a reduced optimal operating temperature of 260℃ and exhibits a response of 19.0–5 ppm xylene, reaching a five-fold enhancement. Simultaneously, the RuO 2 -BiVO 4 sensor also exhibits a rapid response and recovery time of 10 and 25 s respectively, as well as robust long-term stability with less than 5 % variation in response after a storage of 60 days. The improvement in sensing performance can be attributed to the RuO 2 -decoration from three aspects: heterojunction construction, surface state modulation and gas oxidation catalysis on the surface. This work not only provides a high-performance xylene sensing material but also provides insightful comprehension regarding the modification effects of RuO 2 .
研究领域:
材料科学
·
化学工程
·
传感器技术
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产品关联
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Lei Shi,Ze Li,Wenyue Zhao,Zhao Wang,Yazhou Peng,Chang Gao,Wenjing Hua,Jie Wang,Xiaoxia Yang,Weidong Fei,Yu Zhao
Photovoltaic effects of single-layer films, with simple structure and low cost, are generally found in ferroelectric films , but their applications in solar cell are restricted by the large band gap of ferroelectrics . Here, we demonstrate a large photovoltaic effect can be obtained in paraelectric single-layer BiVO 4 (BVO) film based on the gradient distribution of charges. The circuit current density ( J SC ) and open circuit voltage ( V OC ) of the BVO film with best performance are 1.63 mA/cm 2 and 0.38 V, respectively. The J SC of BVO film kept 86% of the maximum value after continuous operation for 16 h. The high thermal stability of BVO is proved by long time operation and stable photovoltaic performance at high temperature. This work not only proposes a novel built-in electric field mechanism, but also indicates that the single-layer paraelectrics can be used as the next generation photovoltaic materials.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Fuhao Liu,Zhiguo Yuan,Sen Zhao,Quande Che,Qian Ma,Junpeng Wang
Tetragonal BiVO 4 nanorod array exhibits excellent carrier transport properties, but due to its p-type conductivity, it can only be used as a photocathode. In this study, an n-type tetragonal BiVO 4 nanorod array doped with molybdenum was successfully fabricated on fluorine-doped tin oxide (FTO) glass substrates via the hydrothermal method. The doping of Mo and its corresponding concentration were accurately ascertained through X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma (ICP) techniques. Computational simulations revealed that Mo doping induces a shallow donor level beneath the conduction band of BiVO 4 . Notably, the structure and morphology of BiVO 4 did not undergo significant changes after Mo doping, but the conductivity type and conductivity of the surface samples were greatly improved as evidenced by Mott-Schottky and conductive atomic force microscopy (C-AFM) measurements. Impressively, the onset potential for oxygen production when utilized as a photoanode was merely 0.2 V vs RHE. More importantly, although its conduction band position is slightly lower than the hydrogen production potential, the doped sample still demonstrated outstanding activity in water splitting for hydrogen generation.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
Micromachines
·
2025
·Vol. 16
·期 8
·866
·
IF 3
Siqiang Cheng,Yun Cheng,Taoyun Zhou,Shilin Li,Dong Xie,Xinyu Li
Despite significant progress in photoelectrochemical (PEC) water splitting, high fabrication costs and limited efficiency of photoanodes hinder practical applications. Bismuth vanadate (BiVO4), with its low cost, non-toxicity, and suitable band structure, is a promising photoanode material but suffers from poor charge transport, sluggish surface kinetics, and photocorrosion. In this study, porous monoclinic BiVO4films are fabricated via a simplified successive ionic layer adsorption and reaction (SILAR) method, followed by borate treatment and PEC deposition of NiFeOx. The resulting B/BiVO4/NiFeOxphotoanode exhibits a significantly enhanced photocurrent density of 2.45 mA cm−2at 1.23 V vs. RHE—5.3 times higher than pristine BiVO4. It also achieves an ABPE of 0.77% and a charge transfer efficiency of 79.5%. These results demonstrate that dual surface modification via borate and NiFeOxis a cost-effective strategy to improve BiVO4-based PEC water splitting performance. This work provides a promising pathway for the scalable development of efficient and economically viable photoanodes for solar hydrogen production.
研究领域:
材料科学
·
可再生能源
·
电化学
·
纳米技术
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太阳能转化
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Xiao Zheng,Xiaodong Zhang,Yanpeng Cai,Shan Zhao,Shuguang Wang
Photocatalyst activated peroxymonosulfate (PMS) under visible-light irradiation to construct a photo-Fenton system has shown great application prospect for environmental remediation. In this study, MoS 2 /BiVO 4 heterojunction nanoflowers were successfully synthesized by hydrothermal method and used to activate PMS under visible-light to achieve highly efficient degradation of bisphenol A (BPA). The constructed heterojunction showed excellent catalytic activity , which was attributed to the synergistic effect of effective separation of charge carriers and PMS activation . In the MoS 2 /BiVO 4 /PMS/vis system, 2-MoS 2 /BiVO 4 (2-MB) exhibited the highest degradation rate constant for BPA (0.1747 min −1 ), which was 91.9 times of pure MoS 2 and 38.0 times of pure BiVO 4 , respectively. The electron paramagnetic resonance (EPR) and radical quenching experiments demonstrated that the oxidative degradation of BPA was mainly participated by SO 4 − , OH, 1 O 2 and h + active species. Through the analysis of energy band structure and element valence state of photocatalyst and the identification of reaction intermediates, the degradation mechanism and degradation pathways were proposed. In addition, MoS 2 /BiVO 4 heterojunction showed high catalytic ability for various organic pollutants (herbicides, pesticide intermediates, antibiotics and dyes), and common anions (Cl − , SO 4 2− and NO 3 − ) and humic acid (HA) had little effect on its degradation efficiency. This study has provided a new solution for the use of heterojunction photocatalysts for visible-light assisted PMS activation to achieve highly efficient degradation of organic pollutants.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
ANALYTICAL LETTERS
·
2025
·
IF 1.8
Dan Wang,Hua Wei,Xiangzhi Gan
Norfloxacin (NFX), an antimicrobial agent effective against a variety of infections including those of the gastrointestinal and urinary tracts, respiratory system, eyes, and skin, was quantified using a photoelectrochemical (PEC) sensor based on a molybdenum disulfide/bismuth vanadate (MoS2/BiVO4) heterojunction, which was synthesized through a straightforward two-step hydrothermal method. The resulting PEC sensor demonstrated linear response ranges of 0.01–1 and 1–40 µM, with a remarkably low detection limit of 0.0019 µM Signal-to-Noise ratio = 3 (S/N = 3), and showed excellent stability for NFX detection. The MoS2/BiVO4 photoelectrode is thus highlighted as a highly promising tool for PEC analysis.
研究领域:
分析化学
·
材料科学
·
环境科学
·
电化学
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Tingting Pan,Yiming Tang,Yuxin Liao,Jiacheng Chen,Yaping Li,Jing Wang,Laisheng Li,Xin Li
Tetracycline antibiotics pose a significant threat to environmental sustainability and human health due to their high concentration in water and soil beyond safety limits. In this study, we developed a BiVO 4 photoelectrode modified with cobalt-phosphate cocatalyst hybrid nanocomposites to degrade tetracycline efficiently. The crystal structures of the composites and the chemical valence of the ions were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The photocurrent generated from BiVO 4 /Co-Pi under visible light irradiation (λ ≥ 420 nm) was 1.99 mA/cm 2 , which was 10.5 times higher than that from pristine BiVO 4 film. The carriers’ dynamics were investigated by surface photovoltage spectroscopy (SPV) and transient photovoltage spectroscopy (TPV). BiVO 4 /Co-Pi demonstrated a 62.6% degradation rate of tetracycline within 60 min, which increased to 95.3% after adding peroxomonosulfate (PMS). Co-Pi cocatalyst facilitated charge separation and acted as the hole acceptor, thereby improving the degradation activity. Based on electron spin resonance (ESR) analysis, holes were identified as the dominant oxidizing species in the system. The activated Cobalt-phosphate cocatalyst along with the photogenerated-electrons facilitated the cobalt cycle process and generated sulfate radicals (•SO 4 − ) via PMS activation, leading to efficient tetracycline degradation.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Kejian Li,Yang Yang,Aziz-Ur-Rahim Bacha,Yiqing Feng,Saira Ajmal,Iqra Nabi,Liwu Zhang
Halogenated organic compounds (HOCs) like chlorophenols (CPs) are one of persistent organic pollutants in environment, and it is an urgent issue to remove HOCs efficiently because they are detrimental to aquatic organisms and human beings. Electrocatalytic hydrodechlorination (ECH) technique has been widely studied to deal with chlorophenols. However, litter attention has been paid to the further treatment of the dechlorination product phenol. Meanwhile, photoelectrocatalysis is regarded as a promising method for contaminants elimination and water splitting using inexhaustible solar energy. Therefore, this study proposed a photoelectrochemical reductive hydrodechlorination and sequential oxidation method for thorough degradation of 2,4-dichlorophenol (2,4-DCP) using WO 3 /Mo-doped BiVO 4 as photoanode and Pd/Ni foam as cathode. Several factors such as Pd-loading amount, initial pH, overpotential, and Cl − that would influence the efficiency of 2,4-DCP hydrodechlorination and phenol oxidation have been investigated in detail. The 2,4-DCP could be completely hydrodechlorinated to phenol, and removal efficiency of the obtained phenol reached ~45% for 4 h reaction under optimized conditions. Additionally, there was no secondary chlorinated pollutant generated during the oxidation process even though the existence of Cl − . Lastly, the possible mechanism and degradation pathway were also explored based on LC-MS. This study proposed an efficient and environmental-friendly technique for complete degradation of chlorophenols, which might be also suitable for other HOCs and would be industrialized with the help of further studies.
研究领域:
环境科学
·
电化学工程
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Junlong Zhang,Yan Lu,Lei Ge,Changcun Han,Yujing Li,Yangqin Gao,Songsong Li,Hao Xu
Novel AuPd bimetallic alloy nanoparticles (NPs) decorated two-dimensional (2D) BiVO 4 nanosheet photocatalysts were successfully synthesized via mild wet-chemical process and facile deposition procedure. The composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electronic microscope (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflection spectroscopy (DRS), electron spin resonance (ESR) and surface photovoltage spectroscopy (SPV). The 1.0 wt% AuPd/BiVO 4 nanosheets showed highest photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light (300 W Xe lamp coupled with a UV-cutoff filter (λ ≥ 400 nm)), and the photocatalytic efficiency was improved for about 21.9 and 6.1 times as compared to that of pure BiVO 4 and 1.0 wt% Au/BiVO 4 , respectively. The novel AuPd/BiVO 4 composites may make a way to synthesize 2D semiconductor composites with potential applications for solar energy conversion and environmental purifications.
研究领域:
材料科学
·
光催化
·
纳米材料
·
环境净化
·
能源化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Di Cheng,Huimin Wu,Chuanqi Feng,Yu Ding,He Mei
In this study, a bifunctional photoelectrochemical (PEC) sensor based on Bi/Bi 2 S 3 /BiVO 4 (Bi-BSV) is prepared by one-step hydrothermal method . Firstly, the results from experiments show that the PEC performances of Bi 2 S 3 /BiVO 4 -X (BSV-X, X = m(Bi 2 S 3 )/m(Bi 2 S 3 + BiVO 4 )) are higher than those of Bi 2 S 3 and BiVO 4 , and BSV-15% has the highest PEC performance. To further improve the PEC properties of BSV-15%, metal-Bi was introduced to the synthesis of Y-Bi-BSV-15% (Y represents the amount of glucose added). Moreover, UV–visible diffuse reflectance spectrum (UV–vis DRS) and photoluminescence (PL) demonstrate that 0.3-Bi-BSV-15% has the widest visible light absorption range and strongest photogenerated carriers separation capability among all composites. Based on the above results, the PEC sensor based on the 0.3-Bi-BSV-15% for detecting hexavalent chromium (Cr (VI)) and hydrogen peroxide (H 2 O 2 ) is built. The results exhibit that 0.3-Bi-BSV-15% has a wider detection range of 2–230 µM and a lower detection limit of 0.094 µM for Cr (VI) detection. While for H 2 O 2 detection, the detection range and detection limit are 1–130,000 µM and 0.089 µM, respectively. Therefore, 0.3-Bi-BSV-15% has potential application in Cr (VI) and H 2 O 2 detection.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2019
·Vol. 27
·期 12
·3053-3059
·
IF 1.911
Nianjun Kang,Dongbo Xu,Weidong Shi
In recent years, the excessive use of antibiotics has become a serious problem for human health. BiVO 4 regarded as one of the most promising visible-light-driven photocatalysts was used to degrade the antibiotics. In this paper, we fabricated Bi/BiVO 4 plasmonic photocatalysts which enhanced the photocatalytic activity of BiVO 4 for degradation of tetracycline (TC) antibiotic. The Bi/BiVO 4 photocatalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy and high-resolution transmission electron microscopy . In addition, the photocatalytic experiment results show that the 0.04-Bi/BiVO 4 sample has the best photocatalytic activity for 2 times than the pure BiVO 4 photocatalyst. The cycle experiments, after four repetitions of the experiments, showed the sample still maintained a high photocatalytic activity. Finally, the photocatalytic reaction mechanism was also studied by free radical capture experiments and electron paramagnetic resonance spectroscopy .
研究领域:
环境化学
·
材料科学
·
光催化
·
纳米材料
·
环境污染治理
·
药物降解
✓ 已验证
DOI
高影响因子
Results in Surfaces and Interfaces
·
2025
·
IF 4.4
Xi Chen,Jian'an Chen,Yi Li,Miao Wang,Hanna Potapenko
Using solar energy for photoelectrochemical (PEC) water splitting is a popular way to store sustainable energy and reduce dependence on fossil fuels. Bismuth vanadate (BiVO 4 ) is a promising photoanode material for solar water splitting. In previous studies, it was found that different light directions of the BiVO 4 photoanode produced different photocurrents. It was generally accepted that the carrier transport of BiVO 4 was the reason that causes different photocurrents under different light directions. However, in addition to carrier transport, surface hole transfer may also be an important factor leading to different photocurrents under different light directions, but it has been ignored. In this work, the surface hole transfer efficiency of the BiVO 4 photoanode under front- and back-side illumination was calculated, and the fractional occupancy of surface states was analyzed by photoelectrochemical impedance spectroscopy. The results show that the hole transfer efficiency under front irradiation is about 1.56 times that under back irradiation at 0.1 sun illumination and about 1.2 times that under back irradiation at 1 sun illumination. Under front illumination, the surface of the BiVO 4 photoanode can directly absorb light, which leads to a decrease in the fractional occupancy of surface states, thereby reducing the probability of electron-hole recombination and improving the efficiency of hole transfer. These findings provide a new explanation for the different photocurrents of the BiVO 4 photoanode under different light directions and demonstrate the effectiveness of photoelectrochemical impedance spectroscopy under different light directions for analyzing the surface states of photoelectrodes.
研究领域:
材料科学
·
物理化学
·
能源科学
·
光电催化
·
半导体电极
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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）