摘要
以钛酸丁酯为前驱体,聚乙二醇为模板剂,通过溶胶-凝胶工艺合成纳米TiO_2光催化材料。利用XRD、SEM、UV-Vis对试样进行表征,以甲基橙模拟污染源,测试不同煅烧温度下纳米TiO_2样品在紫外光照射下的催化活性。研究结果表明:样品在500、600℃煅烧时为单一的锐钛矿相,当温度升高到700℃时,为锐钛矿相与金红石相的混合相。双相组织晶粒细小,分散有序,形成相对有序的孔道结构,大大提高光催化的性能,最大吸收峰出现在波长432 nm处,吸收速度快,效果好。
Nano-TiO2 photocatalysis material was prepared by sol-gel method using Dutyt utanate as pre- cursor and polyethylene glycol as template agent. The samples of nano-TiO2 were characterized by XRD, SEM and UV-Vis. The catalytic activities of the TiO2 samples prepared at different calcination tempera- tures were tested under ultraviolet irradiation with methyl orange as simulative pollutant. The results show that the samples prepared at 500 and 600℃ are composed of single anatase phase and a mixed phase of anatase and rutile is obtained with calcination at 700 ℃ for the nano-TiO/. The crystal size of the nano- TiO2 increases with methyl orange. The increase in the calcination temperature, leading to decrease in the degradation rate of maximum adsorption peak of the nano-TiO2 appears at the wavelength of 432 nm with a favorable adsorption effect and a quick adsorption speed, which can reach the adsorption equilibrium in about 30 min.
出处
《钢铁钒钛》
CAS
北大核心
2016年第4期44-47,共4页
Iron Steel Vanadium Titanium
基金
宿迁学院大学生科技创新项目(编号:2015YSJ011)
江苏省教育厅项目(编号:14KJB450001)
关键词
二氧化钛
光催化
溶胶-凝胶法
甲基橙
降解率
TiO2, photocatalysis, sol-gel method, methyl orange, degradation rate
