Journal of Chemistry
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2015
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IF 0.772
Hao Zhou,Dong-Yao Xu,Hai-Qing Zuo,Wei Liu,Shuang Lin
Urchin-like Cu-W18O49 and flower-like Cu-WO3 structures were successfully synthesized using a hydrothermal process followed by calcination. The synthesized products were characterized using XRD, SEM, and TEM. The results revealed that the as-prepared urchin-like and flower-like samples with monoclinic structures, which were approximately 1 μm and 1-2 μm, respectively, possessed microflower architecture assembled by the nanosheet. In addition, the gas sensing properties of monoclinic-structured Cu-WO3 to acetone were measured using a static state gas sensing test system. The sensor based on the flower-like Cu-WO3 nanostructures, which were calcined at 600°C, exhibited high sensitivity toward 10 ppm acetone at an optimum temperature of 110°C, and the maximum sensitivity reached 40, which was approximately four times higher than that of urchin-like WO3 that was annealed at 300°C. The sensitivity was improved by increasing the acetone concentration. The detection limit was as low as 1 ppm. Using linear fit, the sensor was determined to be sufficiently sensitive to detect acetone in a detection range of 1 to 10 ppm even in the presence of interfering gases, which suggests that this type of sensor has excellent selectivity and has the potential for use in acetone gas sensors in the future.
研究领域:
材料科学
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化学
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DOI
高影响因子
OPTICAL MATERIALS
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2025
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IF 4.2
Yuxi Liu,Wenjing Zhang,Weimeng Chi,Yuxuan Liu,Ying Chen,Yuning Liang
As a potential Fenton catalyst, Fe-based organic frameworks (Fe-MOFs) severely limit their application in practical heavy pollution due to their slow cycling rate. In this work, a novel photocatalyst (NH 2 -MIL101(Fe, Cu)/WO 3 ) was synthesized using a two-step hydrothermal method. Research on photocatalytic activity revealed that NH 2 -MIL101(Fe, Cu)/WO 3 , when combined with H 2 O 2 , exhibits higher degradation efficiency compared than pure NH 2 -MIL101(Fe, Cu) or WO 3 alone, achieving up to 90 % degradation of levofloxacin (LEV) under visible light irradiation. In addition, the effects of hydrogen peroxide dosage, pH and other factors on degradation performance were studied, and the results demonstrated good stability even after multiple cycles. This excellent photocatalytic performance is attributed to the formation of heterogeneous structures as well as the doping of copper ions. This not only inhibits the electron-hole recombination, but also improves the redox capacity of the catalyst accelerating the regeneration of Fe 3+ . This work offers a way to enhance the photo-Fenton activity of Fe-MOF-based catalysts.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
LANGMUIR
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2023
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IF 3.9
Xingrui Qi,Jiamin Gan,Zhidong Zhao,Nian Li,Yufang Chen,Tao Jin
One of the potential treatments for bacterial wound infections is photodynamic therapy. WO3–x semiconductor materials can generate reactive oxygen species when exposed to light, which can inactivate bacteria. In this work, we improved their photocatalytic performance by doping WO3–x with Cu. The wound dressing was prepared by loading Cu–WO3–x into a highly biocompatible chitosan sponge. The composite sponge dressing showed significant inactivation of Escherichia coli and Staphylococcus aureus, and in vitro toxicity assays on L929 cells demonstrated the biosafety of the dressing. Through in vivo wound healing trials, composite sponge dressings have been shown to accelerate wound healing, and this composite chitosan sponge can be possibly used for photodynamic therapy of bacterial wound infections.
研究领域:
材料科学
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生物医学工程
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光催化
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伤口护理
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2024
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IF 6.7
Yanni Luo,Caiying Li,Fanggui Ye,Jianniao Tian,Xuecai Tan,Shengqiang Hu,Shulin Zhao
A disease-targeting nanoplatform that integrates imaging with therapeutic activity would facilitate early diagnosis, treatment, and therapeutic monitoring. To this end, a macrophage membrane-coated Cu–WO3–x-Hydro820 (CWHM) nanoreactor was prepared. This reactor was shown to target inflammatory tissues. The reactive oxygen species (ROS) such as H2O2 and ·OH in inflammatory tissues can react with Hydro820 in the reactor to form the NIR fluorophore IR820. This process allowed photoacoustic/fluorescence dual-mode imaging of H2O2 and ·OH, and it is expected to permit visual diagnosis of inflammatory diseases. The Cu–WO3–x nanoparticles within the nanoreactor shown catalase and superoxide enzyme mimetic activity, allowing the nanoreactor to catalyze the decomposition of H2O2 and ·O2– in inflammatory cells of hepatic tissues in a mouse model of liver injury, thus alleviating the oxidative stress of damaged liver tissue. This nanoreactor illustrates a new strategy for the diagnosis and treatment of hepatitis and inflammatory liver injury.
研究领域:
纳米技术
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生物医学工程
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医学成像
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诊疗一体化
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
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2022
·Vol. 13
·期 2
·468-478
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IF 6.177
Xinyu Lu,Xiaoli Gu
The chemical demand for alkyl phenols (mainly extracted from fossil-derived resources) has been increasingly growing, which has accelerated global energy shortages. Due to the inherent aromaticity of lignin, its effective conversion into alkyl phenols is central to its adoption as a sustainable precursor to produce biochemicals. In this study, catalytic transfer hydrogenation (CTH) of alkali lignin was carried out in a mixed medium (isopropanol/formic acid) at 240 °C for 8 h over a series of bimetallic Ni based catalysts. The acidity and reducibility of the as-prepared catalysts are enhanced via WO3 introduction (to form a WO3–Al2O3 mixed support) and a bimetallic synergistic effect, respectively, leading to improved catalytic activity and selectivity towards alkyl phenols. Different kinds of phenolic compounds (e.g., those with substitutions of methoxyl, alkyl, alkenyl, carbonyl, carboxyl, or hydroxyl groups) were generated over these bimetallic Ni based catalysts with various combinations of Ni + Fe/Zn/Co/Mo/Cu, which was due to their own catalytic promotion of certain reactions (e.g., hydrogenation, deoxygenation, and/or hydrogenolysis). Reaction mechanisms of lignin depolymerization were proposed according to the distribution of phenolic compounds. This work provides a comprehensive investigation on yielding alkyl phenols from lignin CTH over a series of inexpensive bimetallic Ni based catalysts (Ni/(Fe/Zn/Co/Mo/Cu)–WO3/Al2O3), and undertook a catalytic evaluation of the bimetallic synergistic effects on improving the chemical selectivity towards alky phenols, which is beneficial for lignin valorization.
研究领域:
化学工程
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材料科学
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可持续化学
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催化
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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）