TiO_(2)/Bi_(2)S_(3)光阳极的制备及其光电性能  

Preparation and photoelectric properties of TiO_(2)/Bi_(2)S_(3) photoanode

作　　者：毛志平[1,2] 李芳 王莎[1] 王坤杰 吴卓朋 于仁红 李新利[1] MAO Zhi-ping;LI Fang;WANG Sha;WANG Kun-jie;WU Zhuo-peng;YU Ren-hong;LI Xin-li(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471023

出　　处：《材料热处理学报》2022年第9期41-48,共8页Transactions of Materials and Heat Treatment

基　　金：中国博士后基金(2018M0632771)。

摘　　要：TiO_(2)光学带隙较宽,对可见光的响应较弱。为拓宽TiO_(2)光吸收范围和降低载流子复合概率,采用窄带隙的Bi_(2)S_(3)与TiO_(2)复合,构建异质结光阳极复合材料。首先对复合材料的物相和微观形貌进行表征,其次分析了复合材料的光电性能,结合复合材料的光电特性优化了制备工艺。改变水热生长Bi_(2)S_(3)的沉积次数,重点分析Bi_(2)S_(3)对异质结光电性能的影响。结果表明:当Bi_(2)S_(3)水热沉积次数为2时,复合材料的光电性能最佳,光电流密度达到0.22 mA/cm^(2),电子寿命为61 ms。与纯TiO_(2)相比,复合材料可显著提升对光吸收范围和强度,并提高了载流子的分离效率。TiO_(2) has wide optical band gap and weak response to visible light.In order to broaden the light absorption range and reduce the carrier recombination probability of TiO_(2),Bi_(2)S_(3) with narrow band gap was used to combine TiO_(2) to construct heterojunction photoanode composites.Firstly,the phase and micro morphology of the composites were characterized.Secondly,the photoelectric properties of the composites were analyzed.In terms of the photoelectric properties of the composites,the preparation process was optimized by changing the deposition times of hydrothermal growth Bi_(2)S_(3) and analyzing the influence of Bi_(2)S_(3) on the photoelectric properties of the composites.The results show that when the number of hydrothermal deposition of Bi_(2)S_(3) is 2,the photoelectric properties of the composites are the best,the photocurrent density reaches 0.22 mA/cm^(2),and the electron life is 61 ms.Compared with pure TiO_(2),the composites can significantly improve the light absorption range and intensity,and boost the carrier separation efficiency.

关 键 词：二氧化钛 异质结 光阳极 光电性能 

分 类 号：TB332[一般工业技术—材料科学与工程]