JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
He Xianhong,Tian Wei,Ahmed Jahangeer,Bai Zhengyu,Yang Lin
Bismuth vanadate (BiVO 4 , BVO) is an ideal photoabsorber for the photoelectrocatalytic water splitting, but its performance and photostability limit its commercial application. Therefore, enhancing the catalytic performance and stability becomes an increasingly crucial issue. In this study, we report a composite catalytic material poly (3,4-ethylenedioxythiophene, EDOT) (PEDOT)-modified β-FeOOH nanosheets loading onto the surface of BVO through the hydrolysis of Fe 3+ in BVO semiconductor film and the catalytic polymerization of EDOT form the conductive polymer. The structure facilitates the catalytic process, and when it is used in photoelectrocatalysis oxygen evolution reaction, it exhibits a photocurrent density of 3.3 mA cm −2 at 1.23 V versus standard hydrogen electrodes. Mechanistic studies show that the introduction of PEDOT-modified β-FeOOH optimized the electrode/electrolyte contact interface, adjusted the defect state, and provided catalytically active sites during the catalytic process. This study provides a feasible idea for exploring the catalytic mechanism of BVO-based photoelectrode and designing catalysts.
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高影响因子
Science China-Materials
·
2024
·Vol. 67
·期 5
·1564-1573
·
IF 6.8
Tian Ze,Wang Zhenxia,Ma Zizai,Li Jinping,Wang Xiaoguang
Photoinduced charge separation and transfer are the core factors affecting the photoelectrochemical performance of BiVO 4 -based photoanodes. Herein, a hole extraction layer was inserted between a BiVO 4 photoanode and an oxygen evolution cocatalyst (OEC). The introduction of Cu 2 O as a hole extraction layer between the OEC layer (FeOOH/NiOOH) and BiVO 4 optimized the migration paths and extended the lifetimes of the photogenerated holes, thus enhancing the photoelectrochemical performance of the photoelectrode. The charge separation efficiency of the optimized BiVO 4 /Cu 2 O/FeOOH/NiOOH photoanode was 92.0% significantly higher than the 70.6% efficiency for pure BiVO 4 . As expected, this photoanode also displayed a high photocurrent density of 3.85 mA cm −2 at 1.23 V RHE (under AM 1.5G illumination), which was 2.77 times greater than that of pure BiVO 4 . Our results indicate that electrodepositing a Cu 2 O hole extraction layer is a simple and scalable method for increasing the photoelectrochemical activity of BiVO 4 photoanodes for solar water splitting.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zijun Sun,Zhen Li,Yi Kuang,Chunrong Su,Shuangwei Yu,Yujing Wang,Xiong He,Jinghua Liu
Severe charge recombination and poor surface water oxidation kinetics are key restrictions of BiVO 4 photoanode for efficient photoelectrochemical (PEC) water oxidation. In order to overcome this issue, we introduce Co@β-cyclodextrin (Co@β-CD) supramolecule as oxidation evolution catalyst (OEC) into BiVO 4 photoanode for the first time via a facile two-step immersion method. The optimal Co@β-CD/BiVO 4 photoanode displays a remarkable photocurrent density of 5.3 mA cm −2 at 1.23 V RHE , which is ca. 3.5 times as high as that of pristine BiVO 4 photoanode. Further analyses indicate that photogenerated holes could quickly transfer from BiVO 4 to Co sites through β-CD, thereby suppressing charge recombination. Moreover, due to the spatial confinement effect of β-CD, the dispersed Co sites in Co@β-CD are considered to possess the high catalytic activity in similar with single-atom catalyst, which accelerates the surface water oxidation kinetics. This work not only demonstrates the superiority of supramolecule/semiconductor composite photoanode, but also provides a facile preparation route for the large-scale preparation of high-performance photoanodes.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Yafang Zhang,Guangfang Li,Xiaohui Yang,Hao Yang,Zhong Lu,Rong Chen
Monoclinic bismuth vanadate (m-BiVO 4 ) micro-/nanostructures with different sizes and morphologies were successfully prepared via a facile and rapid microwave and ultrasonic wave combined technique. The obtained BiVO 4 products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and UV–vis diffuse reflection spectroscopy (DRS). It was found that the solvent and pH value had a significant influence on morphology, size and crystalline structure of the product. Nut-like, potato-like and broccoli-like monoclinic BiVO 4 were fabricated in different solvents. The crystal phase could be modulated by varying the pH value of reaction system. The photocatalytic activities of the products were also evaluated by the degradation of Rhodamine B (RhB) under visible light irradiation. The result revealed that the photocatalytic activities of BiVO 4 nanostructures were closely related to the crystalline phase, band gap and particle size. Monoclinic BiVO 4 nanoparticles with small crystal size and large band gap exhibited remarkable photocatalytic performance.
研究领域:
材料科学
·
环境科学
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DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Huihu Wang,Shenghao Jiang,Liu Ouyang,Yu Xiong,Qianyu Wang,Yun Zhao,Xing Xiang,Chenhuinan Wei
g-C 3 N 5 /BiVO 4 - x heterojunctions with tunable BiVO 4 facet ratios were fabricated. • g-C 3 N 5 /BiVO 4 -F shows best activity via suitable (121)/(040) and (040)/(011) ratios. • H 2 O 2 addition boosts photocatalytic degradation efficiency of ceftriaxone sodium. • In-situ XPS confirms the S-scheme charge transfer in g-C 3 N 5 /BiVO 4 -F heterojunction. S-scheme heterojunctions have garnered significant attention in the photocatalytic degradation of antibiotics due to the efficient charge separation and strong redox capability preservation. However, photocatalytic activity is highly dependent on the exposed crystal facet ratios of the catalyst. A series of g-C 3 N 5 /BiVO 4 (N-CN/BiVO 4 -x) S-scheme heterojunctions were fabricated by tuning the morphology of BiVO 4 into peanut-like (BiVO 4 -P), flake-like (BiVO 4 -F), and decahedral structures (BiVO 4 -B), thereby controlling the ratios of exposed crystal facets. Degradation performance tests revealed the optimal performance of N-CN/BiVO 4 -F. This heterojunction achieved a degradation rate of 71.1% for ceftriaxone sodium (CS). With the introduction of H 2 O 2 , the degradation rate further increased to 85.1%. The results confirmed that the superior performance of N-CN/BiVO 4 -F is closely related to the specific exposure ratios of its (121)/(040) and (040)/(011) crystal facets. Furthermore, in-situ XPS confirmed that the charge transfer follows S-scheme charge transfer mechanism. Photoelectrochemical measurements and radical trapping experiments revealed a possible CS degradation mechanism. This work elucidates how the exposed facets of BiVO 4 regulate the photocatalytic performance of S-scheme heterojunctions. The findings provide a theoretical and practical basis for designing efficient photocatalysis systems. Download: Download high-res image (92KB) Download: Download full-size image
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FIBERS AND POLYMERS
·
2026
·
IF 3.1
Liu Xing,Li Wanying,Li Guoxing,Li Ting-Ting,Lou Ching-Wen,Lin Yan-Yu
Dopamine (DA) abnormality is closely linked to Parkinson’s and other neurodegenerative diseases. Establishing a sensitive and highly selective DA detection platform holds significant importance for clinical diagnosis and disease prevention. This study successfully prepared Fe–BiVO 4 /BiOCl-CF/FeOOH flexible composite electrode based on carbon fiber fabric (CF) substrates via electrospinning, hydrothermal synthesis and impregnation-in situ growth methods. Corresponding photoelectrochemical (PEC) sensors were constructed for quantitative DA detection. The Fe–BiVO 4 /BiOCl heterojunction significantly suppressed photogenerated carrier recombination. FeOOH, functioning as the hole transport layer, further optimized charge separation efficiency, while the three-dimensional porous structure of CF shortened the electron transport path and reduced electrical resistance. The constructed PEC sensor exhibits favorable sensing performance for DA in 0.1 M phosphate buffer (pH = 7.0). Within the concentration range of 1–40 μM, the photocurrent response shows an excellent linear correlation with DA concentration (R 2 = 0.99446), and the detection limit is determined to be 0.038 μM (3σ/S). Moreover, the sensor exhibits negligible interference from common coexisting substances and retains over 80% of its initial photocurrent efficiency after 11 days of continuous operation, demonstrating satisfactory selectivity and stability. This work provides a feasible strategy for constructing highly sensitive, portable PEC sensors for DA detection. Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhonghui Han,Jingxue Sun,Hejun Ren
The efficient construction of semiconductor heterostructures with high crystallinity, small dimensions, and effective electron-hole pair separation is crucial for developing high-performance photocatalysts. In this study, we successfully fabricate a novel heterostructure composed of highly crystalline BiOCl ultrathin nanosheets (∼5 nm) and BiVO₄ nanodots (5–8 nm) via a facile one-step molten salt synthesis (MSS) strategy. Based on Eyring’s significant structure model, we propose a spatially limited growth process and a corresponding structural model in molten salt. Nanosheet-like vacancies formed in the molten salt act as barriers for spatially confined growth and serve as chemically reactive sites. We identify a band alignment with a valence band offset of ∼0.7 eV between BiVO₄ and BiOCl. Combined with theoretical calculations, we demonstrate that charge separation and injection efficiency are significantly enhanced due to improved charge transfer. As a result, the photocatalytic nitrogen fixation activity under visible-light irradiation is markedly improved (187.5 μmol·L⁻¹·h⁻¹·g⁻¹), which is approximately 7.5 times higher than that of pure BiVO₄. Moreover, this novel method can be extended to grow other two-dimensional materials.
研究领域:
材料科学
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光催化
·
纳米材料
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环境化学
·
能源材料
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Chunchun Li,Guobin Zhu,Deqin Chen,Jibran Khaliq
The growing demand for faster and more reliable wireless communication has increased the need for microwave dielectric ceramics with high performance and thermal stability. In this paper, we synthesized Bi1–4x(LaxNdxSmxEux)VO4 ceramics (0.025 ≤ x ≤ 0.1) via a conventional solid-state method at a low firing temperature range of 740–860 °C. Structural analysis was conducted using X-ray diffraction, high-resolution transmission eleectron microscopy, and Raman spectroscopy and showed a composition-driven phase transition from monoclinic scheelite (space group: I2/a) to tetragonal zircon (space group: I41/amd) near x ≈ 0.075, with a mixed-phase region observed at relatively lower substitution levels. This structural change had a direct influence on the dielectric properties: the permittivity (εr) decreased from 66.98 at x = 0.025 to 19.85 at x = 0.1, while the quality factor (Qf) increased from 7904 to 16240 GHz. A nearly temperature-stable point was identified at x = 0.055, where τf reached +8.42 ppm/°C, which is attributed to a compensation effect arising from A-site cation rattling. Far-infrared analysis confirmed that phonon absorptions dominate the dielectric response in the microwave region. To validate practical applicability, a microstrip patch antenna fabricated from the x = 0.055 ceramic achieved a return loss of −22.5 dB at 2.46 GHz, along with 98.8% radiation efficiency and a peak gain of 5.22 dB. These results highlight that controlling the multi-ion substitution and their ratios provides an effective strategy for tuning the phase composition and dielectric performance in BiVO4-based ceramics, which has a strong potential for ISM-band communication devices and emerging wireless technologies.
研究领域:
材料科学
·
微波介质材料
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陶瓷工程
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无线通信
·
电子材料
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yonglei Xing,Huimin Ma,Jian Yi,Xiaoyong Jin,Yage Peng,Gang Ni
Antibiotic pollutants such as levofloxacin (LVF) pose serious threats to ecosystems and human health due to their persistence in aquatic environments, making their efficient removal a great challenge. In this study, a BiFeO 3 /BiVO 4 heterojunction photoanode was rationally designed for the photoelectrocatalytic (PEC) degradation of levofloxacin (LVF) in the presence of peroxymonosulfate (PMS). Under visible light irradiation and a 0.6 V bias, the BiFeO 3 /BiVO 4 photoanode coupled with PMS achieved 78 % LVF degradation, markedly surpassing bare BiVO 4 (≈44 %), with excellent mineralization and stability, retaining > 72 % efficiency after four cycles. Radical quenching experiments revealed the synergistic roles of SO 4 •− , ‧O 2 − , ‧ OH , and h + . To clarify the PMS activation pathway, a dual-chamber H-type reactor with a proton exchange membrane was employed, confirming that PMS activation originated from photogenerated electrons at the photoanode, while the cathode contribution was negligible. Photoelectrochemical analyses (OCP, DPV, EIS, i–t) further demonstrated the adsorption–activation–electron capture behavior of PMS. These findings highlight BiFeO 3 /BiVO 4 as a promising photoanode for PMS-assisted PEC degradation of antibiotics, offering an effective strategy for water purification.
研究领域:
环境科学
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材料化学
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光催化
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水处理技术
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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
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环境净化
·
能源化学
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Analytical Methods
·
2023
·Vol. 15
·期 7
·969-978
·
IF 3.1
Zuxing Zhang,Mingqing Li,Liying Zhai,Jiahui Wu,Li Li
A ternary nanocomposite photoelectrode composed of cadmium sulfide (CdS), polyaniline (PANI), and bismuth vanadate (BiVO4) was successfully designed by combining cyclic voltammetry (CV) with electrochemical deposition and high-temperature calcination. The first synthesized CdS/PANI/BiVO4 composite was used as a photoelectrochemical (PEC) monitoring platform for glutathione (GSH). The ternary CdS/PANI/BiVO4 nanocomposites exhibited higher PEC activity, which was attributed to the accelerated electron transfer by the loading of CdS and PANI, which enables the material surface to better adsorb the electrons separated by GSH, thereby oxidizing it into GSSH. The photoanodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectroscopy, and photoelectrochemical experiments. Under the optimal experimental conditions, the BiVO4 electrode modified with CdS and PANI exhibited a linear response in the concentration range of 0.1–20 μM with a sensitivity of 0.669 μA mM−1 cm−2 and a detection limit of 40 nM. Moreover, the PEC sensor exhibits good reproducibility and long-term stability. In summary, the designed materials have excellent electrochemical properties, which make them ideal candidates for PEC detection of GSH.
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Inorganics
·
2022
·Vol. 10
·期 12
·264
·
IF 3.149
Yangqin Gao,Guoqing Yang,Zhijie Tian,Hongying Zhu,Lianzheng Ma,Xuli Li,Ning Li,Lei Ge
The bare surface of BiVO4photoanode usually suffers from extremely low interfacial charge transfer efficiency which leads to a significantly suppressed photoelectrochemical water splitting performance. Various strategies, including surface modification and the loading of co-catalysts, facilitate the interface charge transfer process in BiVO4. In this study, we demonstrate that CoS2synthesized from the hydrothermal method can be used as a high-efficient co-catalyst to sufficiently improve the interface charge transfer efficiency in BiVO4. The photoelectrochemical water splitting performance of BiVO4was significantly improved after CoS2surface modification. The BiVO4/CoS2photoanode achieved an excellent photocurrent density of 5.2 mA/cm2at 1.23 V versus RHE under AM 1.5 G illumination, corresponding to a 3.7 times enhancement in photocurrent compared with bare BiVO4. The onset potential of the BiVO4/CoS2photoanode was also negatively shifted by 210 mV. The followed systematic combined optical and electrochemical characterization results reveal that the interfacial charge transfer efficiency of BiVO4was largely improved from less than 20% to more than 70% due tor CoS2surface modification. The further surface carrier dynamics study performed using an intensity modulated photocurrent spectroscopy displayed a 6–10 times suppression in surface recombination rate constants for CoS2modified BiVO4, which suggests that the key reason for the improved interfacial charge transfer efficiency possibly originates from the passivated surface states due to the coating of CoS2.Keywords:BiVO4;CoS2;photoelectrochemical water splitting;intensity modulated photocurrent spectroscopy;surface recombination
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