不同晶体结构TiO_(2)的光催化性能  

Photocatalytic properties of TiO_(2)with different crystal structures

作　　者：王军[1] 罗玉红 谢亚楠 WANG Jun;LUO Yu-hong;XIE Ya-lan(Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013,China;Hanchuan Public Test Center, Hanchuan 431600, China)

机构地区：[1]江西科技师范大学江西省材料表面工程重点实验室,江西南昌330013 [2]汉川市公共检验检测中心,湖北汉川431600

出　　处：《湖北师范大学学报（自然科学版）》2021年第2期29-33,共5页Journal of Hubei Normal University：Natural Science

基　　金：江西省教育厅科学技术研究项目(GJJ190608);江西科技师范大学博士启动基金项目(2018BSQD019);江西科技师范大学2020年“大学生创新训练计划项目”(S202011318048)。

摘　　要：为了研究晶体结构对TiO_(2)光催化性质的影响,以钛酸四丁酯为原料,采用溶胶-凝胶法制备了TiO_(2)干凝胶粉末,并在400℃、500℃、600℃和700℃进行退火处理。通过XRD、Raman光谱仪表征不同退火温度TiO_(2)的晶体结构,以亚甲基蓝溶液为降解对象,测试不同晶体结构二氧化钛的光催化性能。结果表明:400℃退火已有部分锐钛矿相TiO_(2)生成,为非晶相和锐钛矿相的混合结构;500℃退火后,TiO_(2)晶化为完整的锐钛矿结构;600℃退火后,TiO_(2)为锐钛矿和金红石的混合相结构;700℃退火后,TiO_(2)为完整的金红石相。光催化性能测试结果表明,不同晶体结构TiO_(2)的光催化效率与亚甲基蓝溶液浓度有关,500℃退火TiO_(2)的综合光催化性能最佳。To study the effect of crystal structure on photocatalytic properties of TiO_(2),the TiO_(2)dyr gel powders were prepared by sol-gel method.The powders was annealed at 400℃、500℃、600℃and 700℃respectively.The crystal structure of TiO_(2)annealed at different temperature was analyzed by XRD and Raman spectra.The methylene blue solution was used as the target degratation object to evaluate photocatalytic properties of TiO_(2).The results showed that TiO_(2)annealed at 400℃was a mixed structure of amorphous structure and anatase phase.TiO_(2)annealed at 500℃was anatase phase structure.TiO_(2)annealed at 600℃was a mixed structure of anatase and rutile structure.And TiO_(2)annealed at 700℃was rutile phase structure.The photocatalytic activity of TiO_(2)with different crystal structure was related to methylene blue solution concentration.The comprehensive photocatalytic performance of TiO_(2)annealed at 500℃was the best.

关 键 词：TiO_(2) 晶体结构 溶胶-凝胶 光催化 

分 类 号：O643[理学—物理化学] O482[理学—化学]