Aurivillius compound Bi_(5)Ti_(3)CrO_(15) as a visible-light-active photocatalyst for hydrogen production from water  

作　　者：Zeming Gu Jun Qian Ran Wang Meilin Lv Xiaoxiang Xu Chun Luo 

机构地区：[1]Clinical and Central Lab,Shanghai Putuo District People’s Hospital,Tongji University,Shanghai 200060,China [2]Department of Neurosurgery,Tongji Hospital,Tongji University School of Medicine,Shanghai 200065,China [3]Shanghai Key Lab of Chemical Assessment and Sustainability,School of Chemical Science and Engineering,Tongji University,Shanghai 200092,China [4]State Key Laboratory of Fluid Power and Mechatronic Systems,School of Mechanical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2021年第11期572-580,I0013,共10页能源化学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(No.51972233);the Natural Science Foundation of Shanghai(No.19ZR1459200);the Shanghai Science and Technology Commission(No.14DZ2261100);the Fundamental Research Funds for the Central Universities.We also thank Prof.Hongying Zhao for EPR analysis.

摘　　要：Layered Aurivillius compound Bi_(5)Ti_(3)CrO_(15) has been synthesized by a hydrothermal method for the application as a photocatalyst to liberate hydrogen from water. Bi_(5)Ti_(3)CrO_(15) owns a narrow band gap (Eg ~2.46 eV) and shows stable photocatalytic activity under both full range (λ ≥250 nm) and visible light illumination (λ ≥420 nm). A short hydrothermal reaction time is critical to achieve high photocatalytic activity as defects such as Cr^(6+) and Bi^(5+) can be avoided. An AQE as high as 3.66% at 420 nm ± 20 nm has been recorded, warranting promising application in the field of solar energy conversions. DFT calculation reveals the important role of Cr^(3+) cations for visible light sensitivity of Bi_(5)Ti_(3)CrO_(15).

关 键 词：Bi_(5)Ti_(3)CrO_(15) Aurivillius phase PHOTOCATALYST Water splitting Visible light DFT 

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]