Journal of Physical Chemistry C
·
2015
·
IF 4.772
Xianqiang Xiong,Haihang Chen,Yiming Xu
Various methods that aim to improve the photocatalytic activity of TiO2 have been reported in the literature. Herein, we report that addition of CuWO4 into the aqueous suspension of TiO2 can result in significant enhancement in the rate of phenol degradation. As the amount of CuWO4 increased, the rate of phenol degradation increased and then decreased. A maximum rate of phenol degradation observed with 2 wt % CuWO4 was about 2.83 times that in the absence of CuWO4. A similar result was also observed with CuO. However, six consecutive tests showed that CuWO4/TiO2 was much more stable than CuO/TiO2, due to the very high stability of CuWO4 against photocorrosion. The improved activity of TiO2 is not due to CuWO4 and CuO themselves and also does not match their solubility in aqueous solution. Moreover, for the generation of OH radicals, and for the decomposition of H2O2 in aqueous solution, CuWO4/TiO2 was also more active than TiO2. Through a (photo) electrochemical measurement, a possible mechanism is proposed, involving electron transfer from the irradiated TiO2 to CuWO4 that facilitates the charge separation of TiO2 and consequently accelerates reactions at interfaces.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 16
·3863-3870
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IF 6.569
Yuwei Zhang,Lina Wang,Xiaoxiang Xu
CuBi2O4 and CuWO4 films (2 × 2 cm) on an FTO substrate have been fabricated to construct an all-copper-based oxide tandem cell for solar-driven photoelectrochemical (PEC) water splitting. CuBi2O4 and CuWO4 films are of opposite semiconductivity, and exhibit a large difference in the onset potentials and matched light absorption, making them ideal for a tandem configuration for solar energy conversion. Under optimal conditions, the tandem cell (4 cm2) exhibits a water splitting photocurrent of 0.3 mA without an external bias under simulated solar insolation. The low cost, non-toxicity, good stability and easy manufacture of this copper-based oxide tandem cell warrant promising applications in the field of solar energy conversion.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 3
·1-13
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IF 2.8
Zhao Xiaohui,Hao Liang,Zhao Qian,Guan Sujun,Lu Yun
We prepared CuWO 4 films and BiOI-CuWO 4 heterojunction films on the surface of copper wire mesh using a simple and low-cost anodization method and immersion method. The light absorption measurement of these films indicated that, compared to the single CuWO 4 films, the BiOI-CuWO 4 heterojunction films exhibited a significant enhancement in light absorption capacity in both the ultraviolet and visible light regions, and its bandgap width continuously decreased with an increase in the number of immersion cycles. The heterojunction formation also enhanced the separation and transfer of photogenerated charge carriers within the films, leading to an increased photocatalytic activity for the degradation of methylene blue (MB) under simulated sunlight. The activity of the heterojunction films was improved by approximately 57% at most compared to the single CuWO 4 films. Their photocatalytic activity remained at a high level after multiple repeated evaluations, ensuring stable performance during long-term use. Active species trapping experiments demonstrated that superoxide radicals play a crucial role in the photocatalytic degradation process. The photogenerated charge carrier transfer mechanism we propose suggests that the photogenerated electrons generated in BiOI transfer to the conduction band of CuWO 4 , while the photoinduced holes produced in the valence band of CuWO 4 transfer to the valence band of BiOI simultaneously, achieving the spatial separation and transfer of photogenerated electrons and holes.
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
ACS Omega
·
2020
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IF 2.87
Caiying Chen,Wanying Bi,Zilong Xia,Wenhui Yuan,Li Li
Photocatalytic technology aiming to eliminate organic pollutants in water has been rapidly developed. In this work, we successfully synthesized CuWO4/ZnO photocatalysts with different weight ratios of CuWO4 through facile hydrothermal treatment. Crystal structures, forms, and optical properties of these as-prepared materials were investigated and analyzed. 3% CuWO4/ZnO showed the optimum photodegradation efficiency toward methylene blue under the irradiation of simulated sunlight for 120 min, the degradation rate of which was 98.9%. The pseudo-first-order rate constant of 3% CuWO4/ZnO was ∼11.3 and ∼3.5 times bigger than that of pristine CuWO4 and ZnO, respectively. Furthermore, the material exhibited high stability and reusability after five consecutive photocatalytic tests. In addition, free radical capture experiments were conducted and the possible mechanism proposed explained that the synergistic effect between CuWO4 and ZnO accelerates the photodegradation reaction. This work provides a feasible technical background for the efficient and sustainable utilization of photocatalysts in wastewater control.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Ruyao Chen,Xincheng Dou,Jiazeng Xia,Yigang Chen,Haifeng Shi
In peroxymonosulfate (PMS) activation processes, sluggish kinetics of Cu 2+ /Cu + redox rate has been the weakness of photocatalytic conversion efficiency. In this work, Bi 2 MoO 6 /CuWO 4 photocatalysts were synthesized via a facile hydrothermal method, which significantly boosted the Cu 2+ /Cu + cycle and promoted PMS activation for the removal of tetracycline (TC) under visible light irradiation. Bi 2 MoO 6 /CuWO 4 with the mass ratio of 4:1 displayed significantly enhanced photocatalytic activity toward TC degradation with the assistance of a low concentration of PMS, which was 1.95 and 2.24 times as those of CuWO 4 and Bi 2 MoO 6 , respectively. The influence of initial pH values, PMS dosage and different inorganic anions during the photodegradation process was systematically investigated and demonstrated that Bi 2 MoO 6 /CuWO 4 could perform photocatalytic reactions in the wide pH range of 2.0–10.0. Also, Bi 2 MoO 6 /CuWO 4 showed excellent reusability and stability in the cycling experiments. Additionally, the possible degradation pathways in the PMS system were proposed according to the determination of generated intermediates during the degradation process. According to the band structures together with active species trapping experiments, a possible type-Ⅱ photocatalytic charge transfer mechanism of Bi 2 MoO 6 /CuWO 4 was reasonably proposed. XPS analysis of the fresh and used samples indicated that constructing type-Ⅱ heterojunction significantly boosted the Cu 2+ /Cu + cycle and promoted PMS activation, thereby accelerating the TC degradation. In conclusion, this work could shed more light on promoting PMS activation for the practical removal of organic pollutants in wastewater.
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
高影响因子
Chinese Physics B
·
2020
·Vol. 29
·期 12
·127801
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IF 1.223
Yue Sun,Fenqi Du,Donghang Xie,Dongmei Yang,Yang Jiao,Lichao Jia,Haibo Fan
Iron (Fe) was successfully doped in CuWO4 photoanode films with a combined liquid-phase spin-coating method via the dopant sources of Fe(NO3)3, FeSO4 and FeCl3. The microstructure of the prepared films was characterized by x-ray diffraction, scanning electron microscopy, and atomic force microscopy. The light absorption and photoelectric conversion properties were evaluated by the UV-visible absorption spectra and monochromatic incident photon-to-electron conversion efficiency. The chemical composition and element combination of the samples were examined by x-ray photoelectron spectroscopy. A linear sweep voltammetric and stability test (I–t) were performed with an electrochemical workstation. The results show that the samples are uniform with a thickness of approximately 800 nm and that the photoelectrochemical performance of the doped films is heavily dependent on the Fe source and dopant concentration. Upon optimizing the doping conditions of Fe(NO3)3 and the optimal source, the photocurrent density in the Fe-doped CuWO4 photoanode film is improved by 78% from 0.267 mA/cm2 to 0.476 mA/cm2 at 1.23 V vs reversible hydrogen electrode. The underlying causes are discussed.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2024
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IF 4.3
Xiaoyu Chen,Xiaodong Li,Zhilin Chen,Binqian Wu,Zhuoran Jia,Feilong Gong
Constructing electrocatalysts with heterogeneous interfaces is of great significance for improving the performance of electrocatalytic hydrogen production . In this work, CuWO 4 ·2H 2 O–CuO (P-CWOC) was synthesized by hydrothermal method , and spherical porous CuWO 4 –CuO (CWOC) was obtained through annealing treatment. The size of CuWO 4 –CuO can be controlled from 72 to 221 nm by regulating the supersaturation of the solution. Among them, CuWO 4 –CuO with a particle size of 72 nm (CWOC-72) possesses the most oxygen vacancies and the largest specific surface area . The W atom in the heterostructure of CuWO 4 and CuO can affect the electronic structure of Cu atoms, and the presence of oxygen vacancies is beneficial for increasing the surface oxygen affinity of the composite material. Benefitting from the largest number of oxygen vacancies and the largest specific surface area, the CWOC-72 own the best catalytic performance compared to the other four catalysts. The overpotential at a current density of 10 mA cm −2 is 121 mV, and the Tafel slope is 70 mV·dec −1 . Its excellent stability was confirmed by chronoamperometry , in-situ XRD , and in-situ Raman spectroscopy , and its alkaline HER performance is superior to most CuO-based catalysts.
研究领域:
材料科学
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电催化
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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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
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材料科学
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能源转换
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Ruikai Wang,Zhichao Hao,Haiyan Li,Chenghui Xia,Bohua Dong,Lixin Cao
Optimizing the interfacial action of photoanode for photoelectrochemical (PEC) behavior to facilitate charge transport is essential for enhancing solar-to-fuel efficiency. Herein, a typical CuWO 4 /NiFe-LDH/Ag photoanode was reported and an alternative pathway for charge transfer in the PEC process through surface states mechanism was elucidated. In particular, the layer double hydroxides (NiFe-LDH) acted as charge-transfer agents to facilitate the transfer of photogenerated carriers; while the surface plasmon resonance (SPR) effect of the Ag provided hot electrons, which increased the carrier concentration and promoted the charge separation. The influence of presence of surface states on the PEC process was systematically illustrated. Experimental results indicated that the optimized CuWO 4 /NiFe-LDH/Ag photoanode displayed a photocurrent that was more than an order of magnitude larger than that of the pure CuWO 4 (increasing from 0.30 mA cm −2 to 1.45 mA cm −2 at 1.23 V vs. RHE), accompanied by favorable electrochemical impedance and stability (maintaining 92.4%). Importantly, increasing the available filled surface states could be beneficial in enhancing the PEC behavior. This work provided additional insights into photoanode charge transport in PEC processes.
研究领域:
材料科学
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能源科学
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光催化
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hongdan Su,Jiyu Yuan,Jianbo Sun
Heterostructures are known for their enhanced electron mobility and adjustable activity, providing effective strategies to modulate selectivity and sensing property in gas sensing applications. In this study, CuWO 4 /WO 3 nanoflowers are synthesized by a hydrothermal method, incorporating CuWO 4 nanoparticles. The recognition capability of WO 3 nanoflowers is tailored from NO 2 to H 2 S by precisely adjusting the loading amount of CuWO 4 nanoparticles. This transformation is attributed to the heterojunction formation by CuWO 4 /WO 3 composite, regulating the gas adsorption types and chemical reactions occurring on the materials’ surface. Potential mechanisms governing gas sensing via electron transport are elucidated by a comprehensive characterization of materials using SEM, HRTEM, XPS, and UPS.
研究领域:
材料科学
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化学工程
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纳米技术
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传感器
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jia Wu,Huimei Liang,Shulan Zeng,Shulin Zhao,Fanggui Ye
Pesticide residues pose significant risks to consumer health. Therefore, it is essential to develop convenient and practical detection methods. Nanozyme colorimetric sensing is widely used for pesticide detection. However, improving its sensitivity and selectivity remains a major challenge. In this study, a smartphone-assisted portable test swab fabricated using CuWO 4 as the extractant, combined with solid-phase extraction (SPE), was designed for the colorimetric detection of thiram (THR). Based on the specific binding between the Cu sites in CuWO 4 and THR, interference was eliminated after the SPE to improve selectivity. Moreover, the sensitivity improved after SPE enrichment. Additionally, THR enhanced the peroxidase-like activity of CuWO 4 , whereas tungsten as a co-catalyst further boosted the nanozyme activity, thereby improving the detection sensitivity (limit of detection: 19 nM). The experimental results demonstrate that this method exhibits high stability and good selectivity, with recoveries in real samples ranging from 90.8 % to 112.4 %.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 13
·9985-9996
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IF 4.6
Simin Yuan,Lianyuan Ge,Yi Li,Xiaohong Wang,Zhongyuan Liu,Yang Cao,Linglin Yang
With the growing issue of antibiotic resistance, it has become increasingly crucial to develop highly efficient antimicrobial materials. While the single-component nanozyme systems exhibited some catalytic activity, their efficiency remains suboptimal. This study presents a Ti3C2/CuWO4/Pt hybrid nanozyme composed of photothermal agents and nanozymes, which leverages the photothermal effect to enhance nanozyme activity and achieve efficient antimicrobial effects. The composite material exhibited peroxidase (POD)-like catalytic activity, effectively converting hydrogen peroxide (H2O2) into hydroxyl radicals (·OH). Meanwhile, the Ti3C2/CuWO4/Pt material demonstrated high photothermal conversion ability, which not only promoted the generation of ·OH under near-infrared (NIR) light irradiation, but also facilitated copper (Cu2+) ions release from the CuWO4 nanozyme, thereby further augmenting its catalytic activity. After 4 to 5 min of light irradiation, the Ti3C2/CuWO4/Pt nanozyme exhibited significant antimicrobial performance against both Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). In summary, this work presents a Ti3C2/CuWO4/Pt nanoplatform that utilizes the photothermal effect to enhance the chemodynamic antimicrobial activity, showcasing its potential applications in antibiotic-free antimicrobial fields.
研究领域:
生物医学工程
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材料科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）