硼在纳米晶氧化钛中的掺杂状态  

Doping states of boron in nanocrystalline TiO_2 powders

作　　者：赵燕宁[1] 刘岗[1] 孙成华[2] 李峰[1] 逯高清[2] 成会明[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016 [2]昆士兰大学工学院化工系,4072,澳大利亚

出　　处：《材料研究学报》2008年第2期125-129,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金50328204~~

摘　　要：用两步水热合成方法制备硼掺杂纳米晶TiO_2粉体,研究了硼在纳米晶氧化钛中的掺杂状态.结果表明,一定硼源加入和水热过程是在TiO_2粉体中实现有效硼掺杂的必要条件.当硼含量较高时,硼原子在TiO_2表面形成具有可调节TiO_2能带结构的B-Ti-O表面掺杂态,可有效提高TiO_2的可见光吸收性能,而且可见光吸收强度随着硼掺杂量的增大而提高.The B-doped nanocrystalline TiO2 powders were synthesized through a two-step hydrothermal route, and the doping states of boron in nanocrystalline TiO2 powders were investigated. The results show that a certain amount of boron source and hydrothermal route are essential to create effective B-doping. Boron atoms with a higher boron concentration can interact with TiO2 surface and create a B-Ti-O surface doping state to modify the band structure of TiO2. The B-Ti-O structure is essential for good visible light absorption according to UV-visible absorption spectra. Furthermore, the absorption intensity of the doped TiO2 increases with the concentration of B- doping increasing.

关 键 词：无机非金属材料 纳米晶TiO2 两步水热合成 硼掺杂态 可见光吸收 

分 类 号：TB321[一般工业技术—材料科学与工程]