光催化
制氢
光电流
材料科学
纳米复合材料
异质结
可见光谱
氢
分解水
化学工程
催化作用
光化学
纳米技术
光电子学
化学
有机化学
工程类
生物化学
作者
Jishu Han,Fangxu Dai,Ying Liu,Ruiyang Zhao,Lei Wang,Shouhua Feng
标识
DOI:10.1016/j.apsusc.2018.10.267
摘要
The photocatalytic hydrogen production has become one of the most promising strategies to solve the energy crisis and environmental pollution. Novel CdSe/SrTiO3 nanocomposites (average diameter ≈ 114.6 nm) with high photocatalytic activity are synthesized and used for visible light photocatalytic water splitting for hydrogen production. Through optimizing the concentration of CdSe QDs, CdSe/SrTiO3 nanocomposites exhibit increased visible light absorption and enhanced photocatalytic hydrogen evolution efficiency compared to SrTiO3 nanoparticles. The maximum H2 evolution amount reaches to 3350.53 μmol in 8 h by using CdSe/SrTiO3-3 as catalyst. Owing to the formation of heterojunction at the interface between CdSe and SrTiO3, the electrochemical impedance spectrum of CdSe/SrTiO3-3 exhibits the smallest arc radius and the photocurrent density of CdSe/SrTiO3-3 reaches to 0.26 μA cm−2. The photogenerated electrons are effectively separated and transferred and the recombination of electron-hole pairs is avoided, thus significantly improving the photocatalytic hydrogen production performance of CdSe/SrTiO3 nanocomposites.
科研通智能强力驱动
Strongly Powered by AbleSci AI