双功能
光催化
制氢
分解水
非阻塞I/O
材料科学
光催化分解水
肖特基势垒
氧化还原
氢
氧气
催化作用
纳米颗粒
析氧
无机化学
光化学
化学工程
纳米技术
化学
光电子学
电化学
物理化学
有机化学
工程类
二极管
电极
作者
Shushan Qiao,Chao Feng,Yuan Guo,Tingxiang Chen,Naeem Akram,Yi Zhang,Wei Wang,Fan Yue,Jide Wang
标识
DOI:10.1016/j.cej.2020.125068
摘要
The exploration of bifunctional catalysts to produce both hydrogen and oxygen will accelerate the progress of overall water-splitting. This paper introduces a facile method to fabricate bifunctional photocatalysts toward the water splitting by doping nano CdS with S vacancies on [email protected] nano-spheres. A serious of photocatalytic catalysts were developed and subsequently characterized, the two half-reactions of photocatalytic water splitting were studied in detail by using sacrificial agents, the hydrogen output at 41699 μmol g−1 h−1 (AQE 28.5%, λ = 420 nm) while the evolution of O2 is as high as 55120 μmol g−1 h−1 (AQE 35.7%, λ = 450 nm). It is a strategy that the presence of [email protected] can trigger the S vacancy in CdS to act as an effective electron trap, the p-n junction of NiO-CdS, as well as the Schottky barrier between NiO and Ni, can change the dynamic characteristics of photogenerated electrons and prolong their life. These prolonged photogenerated electrons can initiate stable and effective photocatalytic redox reactions.
科研通智能强力驱动
Strongly Powered by AbleSci AI