N,S共掺杂纳米TiO2：水解-溶剂热法合成及可见光催化活性  

N,S-Codoped TiO_2: Synthesis via Hydrolysis-Solvothermal Process and Visible Photocatalytic Activity

作　　者：谢明政[1,3] 冯玉杰[1,3] 栾鹏[2] 边辑 井立强[2] 

机构地区：[1]哈尔滨工业大学,城市水资源与水环境国家重点实验室,哈尔滨150090 [2]黑龙江大学,功能无机材料化学教育部重点实验室,哈尔滨150080 [3]哈尔滨工业大学,城市水资源开放利用(北方)国家工程研究中心,哈尔滨150090

出　　处：《无机化学学报》2014年第9期2081-2086,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家杰出青年科学基金(No.51125033);国家创新研究群体基金(No.51121062);国家自然科学基金(No.21071048)资助项目

摘　　要：采用简单的两相分离的水解-溶剂热法,以硫脲为非金属原料,可控地制备了N,S共掺杂的纳米TiO2。所获得的纳米TiO2平均粒径为10 nm、粒径分布集中,且分散性好。N,S共掺杂拓展了纳米TiO2对可见光的响应范围。气氛可控的表面光电压谱(SPS)的测试结果表明,N,S共掺杂引起的表面态能够捕获光生空穴,进而有利于光生电荷分离。在可见光催化氧化水产氧及降解污染物乙醛的过程中,共掺杂的纳米TiO2表现出了高的活性,甚至优越于N掺杂的。这主要归因于N,S共掺杂的纳米TiO2分散性好、可见光吸收强和光生电荷分离高。N,S-codoped TiO2 was prepared controllably by a simple phase-separated hydrolysis-solvothermal process with sulfourea as nonmetal source. The as-prepared sample has a narrowly distributed size of 10 nm and good dispersability. N,S-codoping expands the spectral response range of TiO2. The results of atmospherecontrolled surface photovoltage spectroscopy（SPS） indicate that the codoping-induced surface states could trap the holes, favoring the photogenerated charge carrier separation. The as-prepared N,S-codoped samples show higher visible photocatalytic activity for oxidizing water to O2 and acetaldehyde degradation, even higher than that of N-doped TiO2. This is mainly attributed to the good dispersability, strong absorption for visible light and high charge carrier separation rate.

关 键 词：TiO2 N S共掺杂 水解-溶剂热法 光生电荷分离 可见光催化 

分 类 号：O611[理学—无机化学]