具有{110}面的锐钛矿TiO_(2)单晶的可控合成与光催化性能  

Controllable Synthesis and Photocatalytic Activity of Anatase TiO_(2)Single Crystals with Exposed{110}Facets

作　　者：吴谦[1,2] 吴志娇[1] 李永良[2] 高洪涛[3] 朴玲钰[1] 张天慧[1] 杜利霞[1] WU Qian;WU Zhijiao;LI Yongliang;GAO Hongtao;PIAO Lingyu;ZHANG Tianhui;DU Lixia(National Center for Nanoscience and Technology,Beijing 100190,China;Analytical and testing center,Beijing Normal University,Beijing 100875,China;College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China)

机构地区：[1]国家纳米科学中心,北京100190 [2]北京师范大学分析测试中心,北京100875 [3]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《催化学报》2012年第11期1743-1753,共11页

基　　金：国家重点基础研究发展计划(973计划;2011CB932802);国家科技支撑计划(2011BAK15B05)

摘　　要：采用水热法合成了同时具有最高表面能{110}和{001}晶面的锐钛矿TiO2单晶,通过X射线衍射、扫描电镜和激光拉曼光谱等手段对样品的形貌和结构进行了表征,并系统考察了过氧化氢、氢氟酸和反应温度等关键因素对所得样品中{110}面比例的影响,实现了持续提高{110}面比例的过程.在光催化降解亚甲基蓝反应中,具有{110}面的锐钛矿TiO_(2)单晶的光催化活性显著高于无{110}面的单晶.Anatase TiO_(2) single crystals with a high percentage of the high surface energy{110}facets have been successfully synthesized in a simple and economical way using a modified hydrothermal technique in the presence of hydrogen peroxide and hydrofluoric acid.The morphology and structure of the TiO_(2) single crystals were characterized by X-ray diffraction,scanning electron microscopy,and Raman spectroscopy.The photocatalytic activity of the TiO_(2) crystals for the degradation of methylene blue dye was investigated by ultraviolet light irradiation.The effects of the amounts of HF and H2O2 on the morphology of TiO_(2) have been studied.The reaction time and temperature have also been investigated.In the TiO_(2) single crystals,the{001}and{110}facets are present at the same time.The results indicated that a high yield of single crystals with exposed{110}and{110}facets could be obtained by adjusting the reaction time,reaction temperature,and amounts of HF and H_(2)O_(2).The anatase TiO2 single crystals with exposed{110}facets showed higher photocatalytic activities than those without.

关 键 词：二氧化钛 高表面能晶面 {110}面 水热法 光催化 

分 类 号：O614.411[理学—无机化学]