TiO2晶面调控改性研究  

Study on Modification of TiO2 Crystal Surface

作　　者：潘鹏 段继海[1] PAN Peng;DUAN Ji-hai(Qingdao University of Science&Technology,Shandong Qingdao 266000,China)

机构地区：[1]青岛科技大学,山东青岛266000

出　　处：《当代化工》2020年第2期369-372,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金,项目号:No.21276132。

摘　　要：TiO2用于光催化技术受到两方面的限制:一方面较宽的禁带宽度限制了其对较大波长光的吸收;另一方面,光生载流子易复合导致光量子效率较低。TiO2的诸多改性方法也都是针对这两方面来进行的。通过构造异质结实现光生载流子的分离,可以有效提高光生载流子的利用率,从而提高催化剂的光催化性能。TiO2不同晶面具有不同的表面能及静态介电常数,因此不同表面接触时可以形成异质结。通过控制不同晶面的形成可以构造表面异质结,提高TiO2催化剂的光催化性能。The application of TiO2 in photocatalytic technology is limited in two aspects:The wider band gap limits its absorption of larger wavelength light;The photogenerated carriers are easy to recombine,resulting in lower photoquantum efficiency.Many modification methods of TiO2 are also carried out for these two aspects.The separation of photogenerated carriers can be realized by constructing a heterojunction,which can effectively improve the utilization rate of photogenerated carriers to increase the photocatalytic performance of the catalyst.Different crystal faces of TiO2 have different surface energies and static dielectric constants,so heterojunctions can be formed when different surfaces are in contact.The surface heterojunction can be constructed by controlling the formation of different crystal faces to improve the photocatalytic performance of TiO2 catalyst.

关 键 词：TIO2 光催化 改性 晶面调控 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]