Porous ZnO/BiOI microspheres composed of ultrathin nanosheets were successfully fabricated by an ethylene glycol-assisted solvothermal method,The morphology and size of the as-prepared samples were characterized by X-ray powder diffraction (XRD),field emission scanning electron microscopy (FESEM),high resolution transmission electron microscopy (HRTEM),UV-Vis diffuse reflectance spectra (DRS),X-ray photoelectron spectroscopy (XPS) and N2 adsorpion-desorption measurements.The photocatalytic degradation of RhB aqueous solution shows that the porous ZnO/BiOI microspheres have the highest photodegradation performance with visible light and acetaldehyde (CH3CHO) gas degradation.This finding indicates that the heterojunction effect created between two different semiconductors is of importance in determining the dynamic properties of photogenerated charge transfer and the related photocatalytic properties.%通过一步溶剂热法合成ZnO/BiOI纳米复合材料,在Bi(NO3)3·6H2O、KI、ZnO和乙二醇(EG)溶剂中,制备出的样品尺寸和形貌采用X射线粉末衍射(XRD)、场发射扫描电镜(FESEM)、高分辨透射电镜(HRTEM)、紫外-可见漫反射光谱(DRS)、X射线光电子能谱(XPS)、N2吸附-脱附等,对实验所得产物的组成、结构及光学性质等进行表征.以染料罗丹明B(RhB)水溶液和气态乙醛作为降解对象,采用BiOI、ZnO/BiOI和ZnO微纳材料作为光催化剂,通过对BiOI、ZnO/BiOI和ZnO微纳材料在可见光下光催化降解染料罗丹明B(RhB)水溶液和气态乙醛,结果表明多孔微纳材料的ZnO/BiOI具有更高的降解效率,实验表明多孔微纳材料的ZnO/BiOI具有更高的氧空位浓度,因此使其催化活性增强,讨论了其可能的催化活性机理.
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