Energy Advances
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2023
·Vol. 2
·期 9
·1366-1374
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IF 0
Zhengzhe Xie,Xiaoyuan Liu,Pengpeng Jia,Yu Zou,Jiang Jiang
Replacing water oxidation by the thermodynamically more favorable glycerol oxidation reaction in a photoelectrochemical (PEC) cell is highly desirable, which can not only improve the energy efficiency of hydrogen evolution, but also produce value-added chemicals, given that glycerol is easily accessible as a major byproduct from the biodiesel industry. Herein, a BiVO4/CoV-LDHs/Ag photoanode has been fabricated via a simple electrodeposition and redox strategy, which exhibits excellent PEC activity toward glycerol oxidation. A high photocurrent density of 7.15 mA cm−2 can be achieved at 1.23 V vs. reversible hydrogen electrode, in 0.5 M Na2SO4 solution with 0.1 M glycerol under AM 1.5G illumination, which is 2.7 times that of the pristine BiVO4 photoanode. The significantly enhanced PEC performance can be attributed to the narrowed optical band gap, and improved charge separation and injection efficiencies after surface deposition of CoV-LDHs/Ag on the BiVO4 photoanode. As a result, greatly improved hydrogen production efficiency has been achieved by coupling the photo-electrochemical glycerol oxidation on the BiVO4/CoV-LDHs/Ag photoanode, with the evolved hydrogen gas (123.5 mmol m−2 h−1) nearly double that when using the pristine BiVO4 photoanode.
研究领域:
材料科学
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电化学
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可再生能源
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DOI
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Qiang Fu,Yue Meng,Yiyang Yao,Hui Shen,Bo Xie,Zheming Ni,Shengjie Xia
A synergistic strategy of Facet engineering and the construction of Z-scheme heterojunctions is expected to improve internal consumption and insufficient carriers in photocatalysis significantly. In this paper, Fe 2 O 3 nanoparticles were selectively grown on the (110) facet of BiVO 4 , and facet orientation-supported Z-scheme heterojunction of BiVO 4 (110)-Fe 2 O 3 was constructed for the photocatalytic degradation of tetracycline . The effects of catalyst dosage, pH, temperature, and other conditions on the degradation performance were systematically investigated and found to have excellent catalytic activity , structural stability, and reusability. The removal of TC (15 mg·L −1 ) under 60 min visible light irradiation were 57.7%, 81.7%, and 91.5% for single-phase catalyst, non-directionally loaded BiVO 4 -Fe 2 O 3 and directionally loaded BiVO 4 (110)-Fe 2 O 3 Z-scheme heterojunction (0.3 g·L −1 ), respectively. Combining photoelectric testing and DFT calculation, it was confirmed that the presence of the built-in electric field from BiVO 4 (110) pointing to Fe 2 O 3 (110) in BiVO 4 (110)-Fe 2 O 3 Z-scheme heterojunction facilitates the separation and transfer of photogenerated carriers and significantly improves the photodegradation performance of the material. In addition, the intermediates and degradation pathways were investigated in detail.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Weiwei Meng,Lei Dai,Yuehua Li,Zhangxing He,Wei Meng,Huizhu Zhou,Ling Wang
Mixed potential NH 3 sensors with La 9.95 K 0.05 Si 5 AlO 26.45 (LKSAO) as the solid electrolyte and Bi 1-x Ag x VO 4- δ as the sensing electrode (SE) were developed. Bi 1-x Ag x VO 4- δ was produced by solid state reaction and then characterized by XRD, XPS, SEM and EDS. As revealed from the results, The BiVO 4 samples exhibit an unchanged crystalline structure after Ag doping molar amount x≤0.2, accompanied by the growth of the particle. The sensor based on Bi 1-x Ag x VO 4 - δ exhibit the noticeably enhanced sensing performance to NH 3 in contrast to the sensor using BiVO 4 , including its larger response potential (Δ V ) and higher sensitivity. For instance, the sensors based on BiVO 4 and Bi 0.8 Ag 0.2 VO 4 - δ at 400 °C exhibit the sensitivities of -28.1 and -77.3 mV/decade, respectively. Nevertheless, by Ag doping, there is no effective improvement of the anti-interference ability of the sensor against NO and NO 2 . To address the mentioned problem, CuO, NiO and La 0.8 Sr 0.2 MnO 3 (LSM) were used as reference electrodes (RE). As suggested from the results, using CuO and NiO as the reference electrodes can obviously reduce the cross-sensitivity of the sensor to NO and NO 2 , whereas the sensitivity slightly decrease.
研究领域:
材料科学
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传感技术
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产品关联
DOI
高影响因子
Materials Today Communications
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2023
·
IF 3.8
Xiao Zhang,Yuxiao Chu,Xianqiang Xiong,Qianmin Fan,Deman Han,Chenglin Wu
Despite the narrow band gap and the suitable band edge position, the BiVO 4 photoanode exhibits low metal anticorrosion performance due to inefficient charge separation and transfer. In this work, we introduce a CoP electrocatalyst with metal character on the BiVO 4 surface by cyclic voltammetry to address this challenge, which greatly enhances the electron injection efficiency into the protected metal. The modified BiVO 4 photoanode exhibits high solar water oxidation activity, resulting in a 123 mV cathodic shift on the self-corrosion potential of 304 stainless steel (304SS), enabling excellent metal protection. Additionally, the coupled composite photoanode shows high photo stability under light illumination, with only 8% decay on the open circuit potential after 51 h of photo-illumination. Our mechanism study shows that the CoP overlayer can act as the hole collector and electrocatalyst for water oxidation, and thus the BiVO 4 valence band holes are effectively transferred to the CoP and subsequently to water. Such an improvement inhibits the charge recombination increasing the electron lifetime, and thus realizing the effective protection of 304SS. The present work offers a rather simple process that allows the effective deposition of CoP electrocatalyst on BiVO 4 surfaces, which effectively protects metals from corrosion.
研究领域:
材料科学
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电化学
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能源与环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Dadao Wang,Jian Li,Zhifeng Xu,Yeran Zhu,Guoxin Chen
To improve the visible light utilization and adsorption capacity for combined pollutants (Tetracycline and Cu 2+ ), novel flower-like BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 composite has been successfully synthesized for the first time via a simple two-step process, surfactant-free hydrothermal route and solvothermal method . The crystal structures, chemical compositions , morphologies, optical and photocatalytic properties of the as-prepared samples were characterized by the techniques of XRD , XPS, SEM, HRTEM , BET, UV–vis DRS, and Photocurrent tests (PT). The synthetic sample with 4:1:20 (S5) mass ratio of BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 possessed the highest adsorption capacity and photocatalytic performance simultaneously in all of the as-prepared composites. Adsorption experiment (model 1 and model 2) suggested that there was not only competitive adsorption but also synergistic adsorption mechanisms between Cu 2+ and TC. Compared to pure BiVO 4 , and BiVO 4 /Bi 2 Ti 2 O 7 , BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 displayed more superior photodegradation efficiency with 97.22% removal of TC (10 mg/L) in 60 min, where the optimal conditions were catalyst dosage 1.00 g/L and initial pH at 6.0. In addition, radical trapping experiments revealed that the photo-induced active species superoxide radical ( O 2 − ) and holes (h + ) were the predominant active species in the photocatalytic system. These features demonstrate that the BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 has great application potential for combined pollutants’ removal from water.
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
PubMed
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Jingyuan Huang,Yueyong Ma,Qianqian Chen,Jinyan Zhu,Hongyi Jiang,Hanliang Li,Lian Yi,Haiyan Li,Mei Hong
Nowadays, nano-photocatalysts (NPs) have become the research focus in the field of photocatalysis due to their excellent photocatalytic activity, and microemulsion is an effective method to prepare high-efficiency nano-photocatalysts. Here, BiVO 4 NPs with high efficiency under visible light were prepared by a combination of reverse microemulsion method and calcination method. XRD, SEM, TEM , XPS, DRS, PL , BET and other characterization tests were used to comprehensively explore the influence of water-oil ratio on the physicochemical properties of the catalysts. The results show that BiVO 4 NPs of monoclinic scheelite with high crystallization degree can be obtained by this method. The microscopic morphology, specific surface area and total pore volume of BiVO 4 NPs are significantly affected by the water-oil ratio. It is difficult to obtain BiVO 4 NPs with small particle size and uniform dispersion under the condition of too low or too high water-oil ratio. Meanwhile, the photogenerated carrier recombination efficiency of the catalyst is significantly improved, thus reducing the photocatalytic activity of the catalyst. Strikingly, the BiVO 4 NPs obtained under the condition of water-oil ratio is 20 exhibited well-dispersed nanospheres with diameters ranging from 80 to 100 nm. It has the highest photocatalytic activity due to its high crystallinity , large specific surface area and total pore volume and relatively low photogenerated carrier recombination efficiency. Under visible light irradiation, the degradation efficiency of RhB can reach 97.69% in 100 min, and the rate constant is 0.03253 min −1 .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2020
·
IF 6.215
Yaping Zhang,Yuyu Bu,Fengqiu Jiang,Huan Li,Xi Chen,Jin-Ping Ao
In this work, a typical BiVO 4 photoanode is employed to explore the performance improving mechanism by surface electrochemical reduction. Corresponding results demonstrate some new information that nanoparticle-like amorphous layer is formed on the surface of BiVO 4 and its thickness is positive correlation with the SER force. Furthermore, Scanning Kelvin probe results indicate that the Fermi level of the amorphous layer is shifted positively, inducing a homojunction built-in electric field between the amorphous layer and the bulk BiVO 4 . The transfer ability of photogenerated holes from the bulk to the surface of photoanode can enhance obviously. In addition, due to the quasi-oxygen vacancy defects in the amorphous layer, the enhanced hydrophilicity improves the PEC performance synergistically. However, as the thickness of amorphous layer increasing, it raises the migration time and secondary recombination rate of the photogenerated carriers. Therefore, a controllable amorphous surface and PEC performance of BiVO 4 photoanode can realize by adjusting the SER force.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2016
·
IF 2.758
Jiang Cheng,Xuelian Yan,Qionghua Mo,Bitao Liu,Jun Wang,Xin Yang,Lu Li
A g-C 3 N 4 /BiVO 4 composite photocatalyst with enhanced photocatalytic activity and photoelectrochemical (PEC) performance was fabricated via a simple synthesis method with BiVO 4 nanofibers as starting material. The materials were characterized with different techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectroscopy (FT-IR), N 2 absorption–desorption isotherm (BET) and photoluminescence spectroscopy (PL). The results showed that this synthesis method is effective to make a composite. The photocatalytic evaluation indicates that the photocatalytic activity of the g-C 3 N 4 /BiVO 4 photocatalyst for methylene blue (MB) was about 8 and 7 times higher than that of pure BiVO 4 and g-C 3 N 4 , respectively. This should be due to the enhanced light harvesting ability and to the effective electron transfer during the photocatalytic reaction.
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
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Yang Zhang,Dan Wang,Xintong Zhang,Ying Chen,Lina Kong,Peng Chen,Yinglin Wang,Changhua Wang,Lingling Wang,Yichun Liu
Improving charge transportation and interfacial charge transfer in semiconductor photoelectrodes are two critical issues for achieving high-efficiency photoelectrochemical (PEC) water splitting. Herein, a combined hydrogenation treatment and cobalt-phosphate (Co-Pi) deposition is reported to dramatically enhance the PEC performance of nanoporous BiVO 4 photoanode. Linear sweep voltammograms show that after the combined treatment, photocurrent density of nanoporous BiVO 4 photoanode is increased for ca. 3 times at 1.23 V versus reversible hydrogen electrode (RHE), and the onset potential is negatively shifted from 0.53 V to 0.23 V versus RHE. Combined photoluminescence, Mott-Schottky, open circuit potential, as well as electrochemical impedance spectroscopy analyses reveal the synergistic effect of hydrogenation treatment and Co-Pi deposition on enhancing the PEC performance of nanoporous BiVO 4 photoanode, facilitating both charge transportation and interfacial charge transfer without aggravating charge recombination.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Weiwei Guo,Yuting Shuai,Xuecheng Liu,Jie Zhang,Jiang Wang,Khaled H. Mahmoud,Zeinhom M. El-Bahy,N.M. Mubarak
N-butanol, a poisonous and flammable liquid, has great threat to human life and property security, which is of importance to monitor n-butanol in the environment. In this paper, the pure and Co-doped BiVO 4 polyhedrons are successfully synthesized by hydrothermal method . A series of characterizations, such as XRD , XPS, SEM, UV, and EIS, etc., are used to analyze the crystal structure, morphology, element compositions , optical and electrochemical properties of the as-prepared samples. The optimal sample (3Co-BiVO 4 ) exhibits high gas response (51.65) toward 100 ppm n-butanol, which is around four times higher than that of pure BiVO 4 at 300 °C. In addition, the 3Co-BiVO 4 also has fast response-recovery time, good humidity resistance, favorable selectivity to n-butanol, etc. Based on the above characterizations and gas sensing test results, the enhanced gas sensing mechanism for 3Co-BiVO 4 is proposed. This work provides a feasible strategy to fabricate BiVO 4 polyhedron by doping Co to greatly enhance the gas sensing properties for n-butanol.
研究领域:
材料科学
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环境监测
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
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2021
·
IF 6.024
Yangqin Gao,Zhijie Tian,Hongying Zhu,Huaqing Xue,Lianzheng Ma,Yanjie Dai,Wenyue Zhao,Xuli Li,Ning Li,Lei Ge
Amorphous NiFeMo oxides (a-NiFeMo) synthesized via a simple supersaturated coprecipitation method are explored as a cocatalyst to improve the photoelectrochemical water splitting performance of BiVO4. The performance of the composite photoelectrode is found to be further enhanced through a cyclic-voltammetry-related in situ activation process, and a photocurrent of 5.0 mA/cm2 is achieved at 1.23 VRHE with improved photoelectrochemical stability. X-ray photoelectron spectroscopy (XPS), Raman, and electron spin resonance (ESR) characterization results indicate that the surface-loaded a-NiFeMo cocatalyst undergoes a rapid surface reconstruction during the in situ activation process, which results in an incorporation of phosphate ions in the surface-loaded a-NiFeMo, along with an increased oxidation state of Ni ions and enriched oxygen vacancies. These combined effects lead to an improved oxygen evolution reaction performance and finally result in a reduced charge-transfer resistance at the solid/liquid interface, causing the interfacial charge-injection efficiency to be enormously enhanced from the original 25.1% in pure BiVO4 to 83.3% in BiVO4/a-NiFeMo after being in situ activated. Our result indicates that the rapid surface-reconstruction phenomenon shown in the amorphous materials may provide a promising strategy for designing a highly efficient cocatalyst for photoelectrodes.
研究领域:
材料科学
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电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2021
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IF 3.08
Xin Li Wang,Jin Li,Wei Meng Liu
The disadvantage of bismuth vanadate (BiVO 4 ), a metal oxide semiconductor photocatalytic material, can be overcome by constructing nitrogen-doped graphene-based nanocomposites. Here we state to synthesis pyridinic-N doped graphene/BiVO 4 nanocomposite (N-rGO/BiVO 4 ). Because of many defects were existed pyridinic N-rGO, more tiny particle size and interaction from abundant interfacial, between BiVO 4 and N-rGO sheets, can produce synergistic effects and enhance photocatalytic performance. N-rGO/BiVO 4 composite has a large light absorption range and high photocatalytic activity compared with BiVO 4 and rGO/BiVO 4 . XPS, PXRD , HRTEM , FESEM, UV–vis, PL . etc analytical methods are used to characterize samples and the change of bandgap of samples is verified through theoretical analysis and simulation. After photocatalytic testing, the decomposition of methylene blue dye just required only 80 min under visible light and photocatalytic degradation efficiency of 99.3%. N-rGO/BiVO 4 has great potential for the removal of refractory pollutants from wastewater.
研究领域:
材料科学
·
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）