不同晶型TiO_(2)的可控合成与光催化性能研究  

Study on Controllable Synthesis and Photocatalytic Performances of Different Crystalline TiO_(2)

作　　者：黄剑锋 刘军民 Huang Jianfeng;Liu Junmin(School of Materials Science and Engineering,Sun Yat-sen University,Guangdong,510275)

机构地区：[1]中山大学材料科学与工程学院,广东510275

出　　处：《当代化工研究》2021年第20期1-3,共3页Modern Chemical Research

摘　　要：利用简单易行的方法合成高效的TiO_(2)材料用于光催化降解污染物,是具有较高使用价值和广阔应用前景的技术。本综合实验通过简单的溶胶-凝胶法制备TiO_(2)凝胶,通过控制不同的煅烧温度得到不同晶型的TiO_(2)粉体,然后通过粉晶X-射线衍射(XRD)手段对TiO_(2)粉体的结构进行表征,最后以氙灯为光源,亚甲基蓝为污染物进行光催化性能测试,研究TiO_(2)的催化特性。本综合实验的步骤及相关测试较为简易,在本科阶段开展具有良好的可行性。本实验设计纳入了半导体光催化剂的制备、表征以及光催化性能研究与评价,使学生能通过实验系统地了解和掌握纳米材料的设计、合成、改性和性能评价等方面的思路、方法与技能。It is a promising technique with high application value and broad application prospect to synthesize effective TiO_(2)materials by facile methods for photocatalytic degradation of pollutants.In this comprehensive experiment,TiO_(2)are prepared by a simple sol-gel method,and different crystalline TiO_(2)powders are obtained by controlling different calcination temperatures.Then,the structures of TiO_(2)are characterized by X-ray diffraction(XRD)technique.Finally,the photocatalytic performances of TiO_(2)samples are tested with xenon lamp as the light source and methylene blue as the pollutant to study the catalytic activity of TiO_(2).The involved operation steps and tests are facile,which are feasible to be performed at the undergraduate stage.Meanwhile,this comprehensive experiment includes the preparation,characterization and photocatalytic performance evaluation of semiconductor photocatalysts,which enables students to learn the knowledge and master the skills about the design,synthesis,modification and performances of nano-materials.

关 键 词：TiO_(2)粉体 锐钛矿型 金红石型 混晶效应 光催化性能 

分 类 号：TQ[化学工程]