综合性实验-二氧化钛纳米片的制备及其光催化氧活性物种分析

A Comprehensive Experiment-Preparation of Titanium Dioxide Nanosheets and Analysis of Photocatalytic Oxygen Active Species

介绍了一个化学综合性实验:二氧化钛纳米片的制备及其光催化氧活性物种分析。该实验以氢氟酸为表面控制剂,合成二氧化钛纳米片。采用分子探针的方法,分别通过紫外可见光谱和荧光光谱分析光催化过程中的超氧自由基和羟基自由基。本设计实验贯穿纳米材料的合成、应用、机理分析,十分有利于促进学生对纳米技术和催化技术的系统认识以及无机化学、材料化学、物理化学知识的综合运用,激发学生的创新能力。

A comprehensive chemical experiment,preparation of titanium dioxide（TiO2） nanosheets and analysis of photocatalytic oxygen active species,was demonstrated. TiO2 nanosheets photocatalytic material can be prepared through hydrothermal synthesis with HF as surface control agent. It was characterized by X-ray powder diffraction（XRD） and transmission electron microscope（TEM）. Finally,the photocatalytic activities of oxygen active species（superoxide radical and hydroxy radical） generation over TiO2 were tested under the full spectrum irradiation with UV-vis spectrometer and fluorescence spectrometer. This experiment connected material preparation,application and mechanism study of nanomaterials. It is beneficial to improve student＇s practice ability and comprehensive ability for inorganic chemistry,materials chemistry and physical chemistry,and cultivate their innovative ability.