CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Shang Xu,Dingfa Fu,Kai Song,Lin Wang,Zuobao Yang,Weiyou Yang,Huilin Hou
In the present work, we reported the exploration of WO 3 /BiVO 4 heterojunction photoanodes, which were consisted of one-dimensional WO 3 nanofiber (1D-WO 3 ) cores and BiVO 4 film shells. The 1D-WO 3 nanofibers were prepared by electrospinning, and the BiVO 4 outlayers were subsequently deposited around the surface of 1D-WO 3 fibers via a solution immersion process, leading to the construction of 1D-WO 3 /BiVO 4 heterojunctions. They had a maximum photocurrent density of 2.8 mA cm −2 at 1.23 V vs. RHE under AM 1.5 simulated solar light illumination, which was ∼20 times to that of pure 1D-WO 3 counterparts ( i.e. , 0.15 mA cm −2 ), and comparable to the best one of photoanodes based on WO 3 /BiVO 4 hybrids ever reported. Furthermore, the onset potential of FTO/1D-WO 3 /BiVO 4 photoanode was subsequently reduced, and the maximum incident photon-to-current efficiency ( IPCE ) was enhanced for ∼4 times in comparison to that of 1D-WO 3 counterparts. The mechanism for the enhanced PEC behaviors of WO 3 /BiVO 4 heterojunction photoanodes was proposed.
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
Catalysts
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2020
·Vol. 10
·期 5
·556
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IF 3.52
Yuncheng Cao,Zheng Xing,Bobo Wang,Wei Tang,Rong Wu,Jiangyu Li,Ming Ma
Single-phase photoanodes often suffer inferior charge transport, which can be mitigated by constructing efficient heterojunctions. Thus, we have fabricated a fluorine-doped tin oxide (FTO)/WO3/BiVO4heterojunction using hydrothermal and spin-coating methods. Surface engineering was exploited to further accelerate the reaction kinetics, which was achieved via post-modification with NaOH solution. This treatment alters the surface chemical state of the BiVO4nanoparticles, leading to enhanced charge transport and surface water oxidation processes. As a result, the optimized sample can produce a photocurrent more than two times that of WO3. The simple post-treatment provides a viable and cost-effective strategy for promoting the photoelectric properties of photoanodes.Keywords:FTO/WO3/BiVO4heterojunction;photoelectrochemical;post-modification;surface engineering;solar water-splitting
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
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Jinwang Li,Jianglin Tu,Zhefei Pan,Xun Zhu,Dingding Ye,Yang Yang,Liang An,Rong Chen,Qiang Liao
BiVO 4 is a promising semiconductor for photoelectrochemical water oxidation, yet its performance is still limited by rapid charge recombination and sluggish reaction kinetics. To address these challenges, a WO 3 /BiVO 4 /Ti 3 C 2 /TiO 2 photoanode is developed via the integration of the WO 3 /BiVO 4 heterojunction with the Ti 3 C 2 /TiO 2 Schottky junction. This architecture establishes an internal electric field and cascaded charge transport pathway, collectively suppressing charge recombination. The carrier lifetime is extended to 3.112 ns compared to the WO 3 /BiVO 4 heterojunction (2.111 ns). The hydrophilic nature of Ti 3 C 2 facilitates charge transfer at the photoanode/electrolyte interface. Moreover, the optical absorption edge of the developed photoanode is extended, improving solar energy utilization. Because of these merits, the WO 3 /BiVO 4 /Ti 3 C 2 /TiO 2 photoanode yields a photocurrent density of 3.70 mA cm −2 at 1.23 V vs. RHE, presenting an increase by 126 % over the WO 3 /BiVO 4 photoanode. This work demonstrates a promising interfacial engineering approach to develop high-performance photoanodes.
研究领域:
材料科学
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电化学
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纳米技术
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能量转换
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半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
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2024
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IF 3.7
Zemin Zhou,Ming Li,Yu Hu,Zhipeng Chen
Employing a photoanode with energy self-storage capability is crucial to provide continuous photocathodic protection (PCP) for metal under intermittent irradiation. In this work, NiO, a hole collector, was coupled with WO 3 /BiVO 4 to improve photoelectrochemical properties and photocathodic protection ability for stainless steel (316 SS). The optimal WO 3 /BiVO 4 /NiO photoanode (WB2N2) exhibited 35.1% and 26.6% increase in energy storage capacity compared with WO 3 and WO 3 /BiVO 4 under illumination, respectively. The open-circuit potential (OCP) of 316SS coupled with irradiated WB2N2 was reduced from −143 mV (uncoupled OCP) to −726 mV, and the electrode potential can maintain at −540 mV after light was turned off. It was calculated that electrons of about 1.286×10 −2 C was transferred from WB2N2 to 316 SS after 50 s illumination, which was 11.7 and 5.1 times of that WO 3 and WB2 passed to 316SS, respectively, confirming the best persistent PCP performance of WB2N2 in the absence of light. The positive role of NiO on the PCP and persistent PCP performance was analyzed. The long-term OCP test and XRD analysis proved the stability of WO 3 /BiVO 4 /NiO in PCP performance and chemical composition .
研究领域:
材料科学
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电化学
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腐蚀科学
✓ 已验证
DOI
高影响因子
DESALINATION
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2023
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IF 9.9
Jiancong Zhang,Yang Zi,Wei Shan,Prayoon Songsiriritthigul,Min Luo,Than Zaw Oo,Mono Zaw,Nyein Wint Lwin,Su Htike Aung,Guangguo Ying,Fuming Chen
Nowadays, stable photoelectrochemical seawater desalination is a challenge. In this work, an environmentally friendly WO 3 /BiVO 4 photoanode is reported to achieve stable solar-driven redox desalination . The WO 3 /BiVO 4 photoanode was prepared by the hydrothermal method and drop-casting and the cathode is the activated carbon coated on graphite paper. Within the desalination system , the I − /I 3 − redox species are recycled between anode/cathode chambers. In the short-circuit state, with illumination as the driving force, the salt removal rate of 65.03 μg/(cm 2 ·min) is obtained without the electric consumption. During the desalination process, the energy output process can be implemented with a salt removal rate of 29.8 μg/(cm 2 ·min) with constant current discharge. Importantly, the solar desalination system based on WO 3 /BiVO 4 photoanode is quite stable. Within the five cycles, the variation of the salt removal rate is within 3.32 μg/(cm 2 ·min). As the practical application, the seawater is desalted to the freshwater standard using the current system, in which the conductivity decreases to 0.96 mS/cm from 53 mS/cm. This work provides a feasible approach to developing stable and efficient solar-driven seawater desalination for long-term usage.
研究领域:
环境科学
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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
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Zexu Chi,Jingyun Zhao,Yi Zhang,Han Yu,Hongbing Yu
Morphology and facet engineering have been proved efficient strategies to prepare high-performance photoelectrochemical (PEC) materials. WO 3 /BiVO 4 heterojunction photoanodes with different morphologies were prepared by simply controlling the amount of electrodeposited charge. The coral-like WO 3 /BiVO 4 photoanode with the orientation growth of {110} and {011} active facets of BiVO 4 exhibited the optimal PEC performance due to significantly enhanced separation and transfer of photogenerated charge carriers, while the exposure of {−121} facets showed negative effects. 4.71 mA·cm −2 and 2.9 mA·cm −2 of photocurrent densities were obtained for sulfite and water oxidation , respectively, superior to most reported results. Subsequently, a photoelectrochemical-chlorine (PEC-Cl) system was constructed for antibiotic wastewater detoxification with hydrogen recovery. The analysis results indicated that the system can quickly and effectively remove sulfamethoxazole and reduce its toxicity concurrent with high hydrogen yield. The reactive chlorine species (RCS), especially Cl 2 · − and ClO·, dominated the sulfamethoxazole removal. Possible degradation pathways of sulfamethoxazole were also elucidated.
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
高影响因子
Journal of Materials Chemistry B
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2022
·Vol. 10
·期 21
·4031-4039
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IF 7.571
Xu Li,Kang Cui,Mingzhen Xiu,Chenxi Zhou,Li Li,Jing Zhang,Shiji Hao,Lina Zhang,Shenguang Ge,Yizhong Huang,Jinghua Yu
In this work, novel dual-mode lab-on-paper devices based on in situ grown WO3/BiVO4 heterojunctions onto cellulose fibers, as signal amplification probes, were successfully fabricated by the integration of photoelectrochemical (PEC)/colorimetric analysis technologies into a paper sensing platform for the ultrasensitive detection of alpha-fetoprotein (AFP). Specifically, to achieve an impressive PEC performance of the lab-on-paper device, the WO3/BiVO4 heterojunction was in situ grown onto the surface of cellulose fibers assisted with Au nanoparticle (Au NP) functionalization for enhancing the conductivity of the working zone of the device. With the target concentration increased, more immune conjugates could be captured by the proposed paper photoelectrode, which could lead to a quantitative decrease in the photocurrent intensity, eventually realizing the accurate PEC signal readout. To meet the requirement of end-user application, a colorimetric signal readout system was designed for the lab-on-paper device based on the color reaction of 3,3′5,5′-tetramethylbenzidine (TMB) oxidized by WO3/BiVO4 nanoflowers in the presence of H2O2. Noticeably, it is the first time that the WO3/BiVO4 heterojunction is in situ grown onto cellulose fibers, which enhances the sensitivity in view of both their PEC activity and catalytic ability. By controlling the conversion process of hydrophobicity and hydrophilicity on the lab-on-paper device combined with diverse origami methods, the dual-mode PEC/colorimetric signal output for the ultrasensitive AFP detection was realized. Under optimal conditions, the proposed dual-mode lab-on-paper device could enable the sensitive PEC/colorimetric diagnosis of AFP in the linear range of 0.09–100 ng mL−1 and 5–100 ng mL−1 with the limit of detection of 0.03 and 1.47 ng mL−1, respectively.
研究领域:
分析化学
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生物传感器
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纳米技术
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材料科学
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Peicheng Wei,Yan Wen,Kaifeng Lin,Xin Li
Developing novel photoanodes with high efficiency for photoelectrochemical (PEC) water splitting has become the key to solar energy conversion and storage realm. Herein, 3D worm-like bismuth vanadate (BiVO 4 ) is grafted on 2D thin tungsten trioxide (WO 3 ) underlayer by electrodeposition to form mixed–dimensional structured photoanode, resulting in significant improvement of the photocatalytic performance and the charge separation efficiency. Characterization results prove that the mixed–dimensional structured can boost the photocatalytic activity by suppressing back reaction and charge recombination of the bulk BiVO 4 . Simultaneously, the electrical conductivity of photoanode can be increased by W 6+ doping. Furthermore, a robust catalyst NiCo 2 O x is coated onto the surface of WO 3 /BiVO 4 photoanode, exhibiting a desirable photocurrent of 3.85 mA cm −2 at 1.23 V vs . RHE and an excellent stability over 3 h. Both the excellent photocurrent density and great operational stability of this 2D/3D WO 3 /BiVO 4 photoanode make it a promising material for practical applications.
研究领域:
材料科学
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能源转换与存储
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Yongji Wei,Yanan Xu,Qi Zheng,Qingfeng Li,Yuchen Huang,Yuyan Cao,Nengqin Jia,Chaomin Zhang,Yang Chen
The rational construction of semiconductor heterojunctions with abundant active specific area and matched energy band alignment is vital to boosting photocurrent response in highly sensitive photoelectrochemical (PEC) sensors. Here, a molecularly imprinted PEC sensor is proposed based on a WO 3 /BiVO 4 heterojunction using CAU-17, a Bi-based metal-organic framework (MOF), as a structural control agent. Unlike the conventional embedding structure, in which WO 3 is covered by BiVO 4 or vice versa, this MOF-derived WO 3 /BiVO 4 hybrid comprises WO 3 nanoleaves and uniformly distributed BiVO 4 nanoparticles. This structure offers a comparatively large surface area, enhancing light adsorption and enhancing solid-solid and solid-liquid interfacial contact, thereby promoting photogenerated electron-hole separation, rapid charge transfer, and interfacial reaction. With the aid of molecular imprinting technology, the WO 3 /BiVO 4 -based PEC sensor is capable of quantitatively detecting amoxicillin, a frequently prescribed antibiotic in both human and veterinary medicine. This sensor exhibits broad linear range of 10 −3 –10 3 μmol L −1 , low detection limit of 2.4 × 10 −4 μmol L −1 , high specificity, reproducibility, and stability. Furthermore, it has significant practical potential for environmental pollution monitoring.
研究领域:
材料科学
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分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Dong Li,Siyu Tian,Qiuhua Qian,Caiyun Gao,Hongfang Shen,Fei Han
A nitrogen-doped tungsten oxide/BiVO4 (N-WO3/BiVO4) heterojunction structure was obtained utilizing ammonium paratungstate as the nitrogen source and Bi(NO3)3·5H2O as the bismuth source, exhibiting promising photoelectrochemical (PEC) performances and effectively obtaining a long photoresponse range into the visible light region. Notably, the UV–vis diffuse reflectance spectra of N-WO3/BiVO4 (566 nm, 2.19 eV) exhibited a notable red shift of the absorption edge compared to that of WO3/BiVO4 (516 nm, 2.47 eV). The N-WO3/BiVO4 photoanode demonstrated an excellent photocurrent density of 0.78 mA cm–2 at 0.68 V vs Ag/AgCl, which surpassed those of the WO3/BiVO4 (0.20 mA cm–2), pure WO3 (0.25 mA cm–2), and pure BiVO4 (0.03 mA cm–2) photoelectrodes. The improvement of the PEC performances was primarily due to the synergy of N doping and the involved heterojunction structure, suggesting that N doping increased the Vis-light response and the heterojunction structure promoted charge separation to improve the lifetime of photoinduced carriers.
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
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