TiO2微球的合成+文献综述
毕业论文关键词：氧化石墨烯；TiO2微球；纳米Cu；制备；核/壳结构
Synthesis of TiO2 microspheres
Abstract:Nano-TiO2 photocatalysis is an energy-saved, high efficiency, low cost and non-toxicity environmental technology.TiO2 photocatalyst has broad application perspect ive in wastewater treatment,air purification and Degradation of pollutants. This article describes the TiO2 powder was prepared by sol-gel method with tetra-n-butyl titanate（TBOT）as raw material. The encapsulated process of this study is mainly relies on the direct dehydration condensation reaction between the oxygen-containing functional groups (–COOH, -OH) on the surface of graphene oxides and the hydroxyl groups (–OH) on TiO2 microspheres surface. Then, we explored the synthesized graphene oxide and nano-Cu encapsulated TiO2 core/shell structures composite microspheres. The morphology and activity of the as-prepared samples were well characterized by field-emission scanning electron microscope(SEM), X-ray diffraction technique(XRD), optical diffuse-reflection spectra(DRS) and Fluorescence Spectrophotometer(FL). SEM measurements reveal that the diameter of the as-prepared TiO2 microsphere is about 800-1500 nm. DRS results indicate that comparison with that of the pure TiO2 microspheres, the absorption intensity in the visible region was much enhanced after GO and nano-Cu encapsulated on the surface of the TiO2 microspheres.
Keywords:Graphene oxide; TiO2; nano-Cu; prepared;core/shell structure
目录
中文摘要 1
英文摘要 2
1 前言 5
1.1 纳米TiO2的简介 5
1.2 二氧化钛半导体光催化材料研究的目的和意义 6
1.3 TiO2的光催化原理 7
1.4 制备纳米二氧化钛的不同方法 8
1.4.1 模板法 8
1.4.2 溶胶-凝胶法 8
1.4.3 水热法 8
1.4.4 自组装法 8
1.5 溶胶-凝胶法制备TiO2的特点 9
2 实验部分 10
2.1 化学试剂 10
2.2 化学仪器 10
2.3 TiO2微球的制备 11
2.4 氧化石墨烯包覆的TiO2微球的制备 12
2.5 纳米铜负载的氧化石墨烯包覆的TiO2微球的制备。 13
2.6 掺C的TiO2微球的制备 13
2.7 物理表征 13
3 结果与讨论 14
3.1 TiO2微球结构和形貌分析 14
3.1.1 TiO2微球的XRD图谱分析 14
3.1.2 TiO2形貌分析 15
3.2 氧化石墨烯、纳米铜包覆的TiO2核壳结构微球的制备和表征 15
3.2.1 氧化石墨烯、纳米铜包覆的TiO2核壳结构微球的XRD图谱分析 16