In2O3/ZrO2-TiO2空心球复合材料的制备与光解水制氢性能

摘要

以聚苯乙烯(PS)胶球为模板,通过一步法结合煅烧后处理制备了空心球复合材料In2 O3/ZrO2-TiO2.采用X射线衍射(XRD)、X射线光电子能谱(XPS)、 扫描电子显微镜(SEM)、 紫外-可见漫反射吸收光谱(UV-Vis DRS)和氮气吸附-脱附等测试手段对复合材料的结构、 组成和形貌进行了表征.结果表明,In2 O3/ZrO2-TiO2复合材料的晶型结构以锐钛矿型TiO2为主,同时存在少量含有Ti—O—Zr键的混合氧化物.该复合材料经聚苯乙烯模板处理后呈现空心球状结构,球壁由纳米粒子堆积而成.In2 O3/ZrO2-TiO2空心球复合材料的比表面积较大(66.92 m2/g),且In2O3与ZrO2-TiO2复合后光吸收发生了红移.对该复合材料光解水制氢性能的研究结果表明,空心球状In2 O3/ZrO2-TiO2具有较好的产氢效果(56.7μmol/g,8 h),明显高于P25、ZrO2、空心球状ZrO2-TiO2及粉末状In2 O3/ZrO2-TiO2.%Using polystyrene spheres(PS) latex as the template, In2O3/ZrO2-TiO2 hollow spheres were prepared by one-step method combined with calcination treatment. The structure, composition and morphology of the composite were characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), ultraviolet-visible diffuse reflectance spectroscopy ( UV-Vis DRS ) , scanning electron microscopy ( SEM ) and N2 absorption-desorption measurements. The results showed that In2 O3/ZrO2-TiO2 hollow sphere was mainly anatase TiO2 and its optical absorption red-shifted slightly. In2 O3/ZrO2-TiO2 hollow spheres also showed higher activity for hydrogen production, its hydrogen production was higher than that of P25, ZrO2, hollow sphere ZrO2-TiO2 and powder In2 O3/ZrO2-TiO2 .