介孔SiO包覆单斜BiVO₄的吸附与光催化过程
Adsorption and Photocatalytic Processes of Mesoporous SiO-Coated Monoclinic BiVO.
作者信息
Channei Duangdao, Nakaruk Auppatham, Khanitchaidecha Wilawan, Jannoey Panatda, Phanichphant Sukon
机构信息
Department of Chemistry, Faculty of Science, Naresuan University, Phitsanulok, Thailand.
Research Center for Academic Excellence in Petroleum, Petrochemicals and Advanced Materials, Naresuan University, Phitsanulok, Thailand.
出版信息
Front Chem. 2018 Sep 19;6:415. doi: 10.3389/fchem.2018.00415. eCollection 2018.
The silicon dioxide (SiO)-coated bismuth vanadate (BiVO) composites as visible-driven-photocatalysts were successfully synthesized by the co-precipitation method. The effects of SiO coating on the structure, optical property, morphology and surface properties of the composites were investigated by X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM) and Brunauer-Emmette-Teller (BET) measurements. The photocatalytic activity of monoclinic BiVO and BiVO/SiO composites were evaluated according to the degradation of methylene blue (MB) dye aqueous solution under visible light irradiation. The SiOcoated BiVO composites showed the enhancing photocatalytic activity approximately threefold in comparison with the single phase BiVO.
通过共沉淀法成功合成了二氧化硅（SiO）包覆的钒酸铋（BiVO）复合材料作为可见光驱动光催化剂。采用X射线衍射（XRD）、紫外-可见漫反射光谱（DRS）、透射电子显微镜（TEM）和布鲁瑙尔-埃米特-特勒（BET）测量等方法研究了SiO包覆对复合材料结构、光学性质、形貌和表面性质的影响。根据亚甲基蓝（MB）染料水溶液在可见光照射下的降解情况，评估了单斜相BiVO和BiVO/SiO复合材料的光催化活性。与单相BiVO相比，SiO包覆的BiVO复合材料的光催化活性提高了约三倍。
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