Abstract

A novel hollow meso-TiO₂/ZnO composite microsphere is fabricated by simple sol–gel and hydrothermal method, and could be a binary photocatalytic material. The carbon sphere is used as the hollow template for the composite material, then the meso-TiO₂ used as the inner shell and the nanometer ZnO as the outer shell. The results of photocatalytic degradation for methyl orange show that the photocatalytic performance of the composite is better than that of a single photocatalyst, degradation rate is up to 96.9% after 2.5 h under UV light. Compared with meso-TiO₂, the excitation wavelength of composite microspheres has moved 12 nm in the direction of visible light. The meso-TiO₂/ZnO composite microsphere has higher photocatalytic performance, which is attributed to the hollow structure and the synergy of meso-TiO2 and ZnO. The hollow structure and mesoporous channel are used as the storage warehouse and transport channel of methyl orange molecule respectively.

The hollow structure and mesoporous channel are used as the storage warehouse and reaction channel of methyl orange molecule, respectively. The higher photocatalytic performance of meso-TiO₂/ZnO composite microsphere is also attributed to the synergy of meso-TiO₂ and ZnO.

中文翻译：

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新型中空介孔TiO 2 / ZnO复合微球的合成及高光催化性能

摘要

通过简单的溶胶-凝胶法和水热法制备了新型中空TiO ₂ / ZnO复合微球，它可能是二元光催化材料。将碳球用作复合材料的空心模板，然后将内消旋TiO ₂用作内壳，将纳米ZnO用作外壳。甲基橙的光催化降解结果表明，复合材料的光催化性能优于单一光催化剂，在紫外光下2.5 h后降解率高达96.9％。与中观TiO ₂相比，复合微球的激发波长在可见光方向上移动了12 nm。中观T​​iO ₂/ ZnO复合微球具有较高的光催化性能，这归因于中空结构以及介观TiO2与ZnO的协同作用。中空结构和介孔通道分别用作甲基橙分子的储存库和运输通道。

中空结构和介孔通道分别用作甲基橙分子的储存库和反应通道。内消旋- TiO 2的较高的光催化性能₂ / ZnO复合微球也归因于内消旋-二氧化钛的协同₂和ZnO。