SrTiO_(3)-CaCr_(0.5)Nb_(0.5)O_(3) solid solutions as p-type photocatalysts for Z-scheme water splitting under visible light illumination  

作　　者：Zeming Gu Qi Wang Xiaoqin Sun Lingwei Lu Yuwei Zhang Ran Wang Shu Jin Yinlin Shao Jun Qian Xiaoxiang Xu 

机构地区：[1]Clinical and Central Lab,Putuo People’s Hospital,Department of Neurosurgery,Tongji Hospital,Tongji University School of Medicine,Shanghai Key Lab of Chemical Assessment and Sustainability,School of Chemical Science and Engineering,Tongji University,Shanghai,China [2]State Key Laboratory of Fluid Power and Mechatronic Systems,School of Mechanical Engineering,Zhejiang University,Hangzhou,310027,China

出　　处：《Journal of Materials Science & Technology》2021年第28期46-53,共8页材料科学技术（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.51972233);Natural Science Foundation of Shanghai(Grant No.19ZR1459200);Shanghai Science and Technology Commission(14DZ2261100);the Fundamental Research Funds for the Central Universities for funding。

摘　　要：P-type semiconductivity has been observed in solid solution series(SrTiO_(3))_(1-x)(CaCr_(0.5)Nb_(0.5)O_(3))x(0.0≤x≤0.15),which all adopt cubic symmetry and own intense absorption in the visible light region.These solid solutions are superior H2 evolution photocatalysts under visible light illumination(λ≥400 nm).An AQE as high as 1.02%at 420±20 nm has been achieved at optimal composition(SrTiO_(3))_(0.85)(CaCr_(0.5)Nb_(0.5)O_(3))0.15 which significantly surpasses the parent compounds.Stoichiometric H_(2)/O_(2) production under visible light illumination has been successfully realized using Z-scheme system containing(SrTiO_(3))_(0.85)(CaCr_(0.5) Nb_(0.5) O_(3))_(0.15),WO_(3) and I^(-)/IO_(3)^(-)redox couple.

关 键 词：p-Type semiconductor PHOTOCATALYST Z-scheme Water splitting Solid solution 

分 类 号：TQ116.2[化学工程—无机化工] O643.36[理学—物理化学] O644.1[理学—化学]