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首页> 外文期刊>Catalysis science & technology >Photocatalytic oxidation of glucose in water to value-added chemicals by zinc oxide-supported cobalt thioporphyrazine
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Photocatalytic oxidation of glucose in water to value-added chemicals by zinc oxide-supported cobalt thioporphyrazine

机译：光催化氧化葡萄糖水增值由锌oxide-supported化学品

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A new composite photocatalyst, ZnO/CoPzS(8), was obtained by immobilizing cobalt tetra(2,3-bis(butylthio)maleonitrile)porphyrazine (CoPzS(8)) onto the surface of home-prepared ZnO. The ZnO/CoPzS(8) composite was well characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. It turned out that CoPzS(8) was successfully loaded onto the ZnO surface and there existed an interaction between ZnO and CoPzS(8). By using the ZnO/CoPzS(8) composite photocatalyst, the photocatalytic oxidation of glucose to value-added chemicals in pure water was conducted under simulated sunlight irradiation without adding any acid or base. The ZnO/CoPzS(8) composite exhibited a higher photocatalytic activity in comparison to pure ZnO and pure CoPzS(8) owing to the synergistic effect between ZnO and CoPzS(8). Gluconic acid, arabinose, glycerol and formic acid were all observed as oxidation products when pure ZnO or ZnO/CoPzS(8) composite was used. More importantly, glucaric acid was also obtained in the ZnO/CoPzS(8) photocatalytic system, indicating that the presence of CoPzS(8) changed the glucose reaction pathway. In addition, the active species generated in the photocatalytic process were further identified by electron spin resonance (ESR) technology and scavenger experiments. A possible photocatalytic conversion pathway of glucose has been proposed according to the experimental results.
机译：一个新的复合光催化剂,氧化锌/ CoPzS (8)通过固定钴(CoPzS(8))到home-prepared氧化锌的表面。氧化锌/ CoPzS(8)复合特征通过x射线衍射(XRD)、紫外可见漫反射反射光谱(DRS), x射线光电子能谱(XPS)和拉曼光谱学。成功加载到氧化锌表面存在一个氧化锌和之间的相互作用CoPzS(8)。光催化剂,光催化氧化葡萄糖在纯水增值的化学物质模拟阳光下进行没有添加任何酸或碱辐照。氧化锌/ CoPzS(8)复合材料表现出更高的纯氧化锌光催化活性相比和纯CoPzS(8)由于协同效应氧化锌和CoPzS之间(8)。阿拉伯糖、甘油和甲酸当纯氧化锌或观察氧化产品氧化锌/ CoPzS(8)复合使用。重要的是,glucaric酸也获得氧化锌/ CoPzS(8)光催化系统,表明存在CoPzS(8)改变葡萄糖反应通路。光催化活性物种生成的过程被电子自旋进一步确认共振(ESR)技术和食腐动物实验。葡萄糖的途径提出了根据实验结果。

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