空心球形In2O3/ZrO2-TiO2纳米复合材料多模式光催化

摘要

In this paper,using polystyrene (PS) spheres as the template,In2O3/ZrO2-TiO2 hollow spheres (In2O3/ZrO2-TiO2-H) with different proportions were prepared by one-step method combined with calcination treatment.The structures,compositions and morphologies of as-prepared composites were characterized by XRD,XPS,UV-Vis/DRS,SEM and N2 absorption-desorption measurements.The results showed that In2O3/ZrO2-TiO2 composites had a hollow spherical structure after being treated by PS template,and the spherical wall was formed by the nanoparticles.After compounding In2O3 with ZrO2-TiO2,its optical absorption had red-shifted slightly,moreover,the specific surface area of In2O3/ZrO2-TiO2-H (1∶ 4) hollow sphere was larger (66.92 m2 ·g-1).In2O3/ZrO2-TiO2-H (1∶4) showed higher photocatalytic activity in the degradation of methyl orange (MO) under multimodes photocatalysis,compared with P25,ZrO2,In2O3/ZrO2-TiO2,and other ratio In2O3/ZrO2-TiO2-H.%本文以聚苯乙烯(PS)胶球为模板,通过一步水浴法结合煅烧后处理制备了不同比例的In2O3/ZrO2-TiO2空心球状复合材料(简写为In2O3/ZrO2-TiO2-H).通过X-射线衍射、扫描电镜、X-射线光电子能谱、紫外-可见漫反射吸收光谱和氮气吸附-脱附等测试手段对该系列复合材料的结构、组成和形貌进行了表征.结果表明,In2O3/ZrO2-TiO2复合材料经PS模板处理后呈现空心球状结构,球壁由纳米粒子堆积而成.将In2O3与ZrO2-TiO2复合后其光吸收性能呈现了一定的红移现象,且In2O3/ZrO2-TiO2-H(1∶4)的比表面积较大(66.92m2·g-1).同时,为了考察该复合材料的光催化性能,在多模式光催化条件下对甲基橙的降解情况进行了研究.结果表明,In2O3/ZrO2-TiO2-H(1∶4)表现出较好的光催化性能,其光催化活性高于P25、ZrO2、In2O3/ZrO2-TiO2及其他体积比的In2O3/ZrO2-TiO2-H.