Geng Yanling, Ma Jiyan, Hou Zhenfei, Li Na, Wang Lei
State Key Laboratory Base of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
J Nanosci Nanotechnol. 2019 Dec 1;19(12):7771-7776. doi: 10.1166/jnn.2019.16771.
In this work, ZnWO₄/BiOI composite photocatalysts were synthesized via a facile water bath method. The photocatalysts were characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffusion reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy. Furthermore, the photocatalytic degradation of methylene blue (MB) using ZnWO₄/BiOI was studied under the irradiation of visible-light. The results showed that ZnWO₄/BiOI composites displayed much higher photocatalytic activity than pure ZnWO₄ and BiOI. Among all the samples, ZnWO₄/BiOI with the molar ratio of 5:5 (ZB-5) displayed the highest photocatalytic activity. The Enhancement of the photocatalytic activity primarily resulted from the effective separation of photogenerated electron-hole pairs. According to the radical scavengers experiments, O₂ and played an important role during the degradation process.
在本工作中，通过简便的水浴法合成了ZnWO₄/BiOI复合光催化剂。使用X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、紫外-可见漫反射光谱（DRS）和光致发光（PL）光谱对光催化剂进行了表征。此外，研究了在可见光照射下ZnWO₄/BiOI对亚甲基蓝（MB）的光催化降解。结果表明，ZnWO₄/BiOI复合材料表现出比纯ZnWO₄和BiOI更高的光催化活性。在所有样品中，摩尔比为5:5的ZnWO₄/BiOI（ZB-5）表现出最高的光催化活性。光催化活性的增强主要源于光生电子-空穴对的有效分离。根据自由基清除剂实验，O₂和 在降解过程中起重要作用。
