Interstitial P-Doped CdS with Long-Lived Photogenerated Electrons for Photocatalytic Water Splitting without Sacrificial Agents
Interstitial P-Doped CdS with Long-Lived Photogenerated Electrons for Photocatalytic Water Splitting without Sacrificial Agents
复制标题
具有长寿命光生电子的间隙 P 掺杂 CdS，用于无需牺牲剂的光催化水分解
DOI：
10.1002/adma.201705941
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发表时间：
2018-02-08
影响因子：
29.4
通讯作者：
Chen, Yong
中科院分区：
文献类型：
--
作者：
Shi, Rui;Ye, Hui-Fang;Chen, Yong
在没有任何电子牺牲剂的情况下，利用富含S空位的间隙P掺杂CdS（CdS-P）作为光催化剂，成功实现了纯水光催化析氢。通过间隙P掺杂，S空位的杂质能级位于费米能级附近，成为CdS-P中有效的电子陷阱能级，可以改变光生电子的动态特性，从而延长其寿命。长寿命的光生电子能够到达表面活性位点，引发有效的光催化氧化还原反应。此外，通过负载CoP作为助催化剂，可以进一步提高CdS-P的光催化活性。
Photocatalytic hydrogen evolution from pure water is successfully realized by using interstitial P-doped CdS with rich S vacancies (CdS-P) as the photocatalyst in the absence of any electron sacrificial agents. Through interstitial P doping, the impurity level of S vacancies is located near the Fermi level and becomes an effective electron trap level in CdS-P, which can change dynamic properties of photogenerated electrons and thus prolong their lifetimes. The long-lived photogenerated electrons are able to reach the surface active sites to initiate an efficient photocatalytic redox reaction. Moreover, the photocatalytic activity of CdS-P can be further improved through the loading of CoP as a cocatalyst.