Key Laboratory of Photochemical Conversion and Optoelectronic Materials and HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Adv Mater. 2018 Feb;30(6). doi: 10.1002/adma.201705941. Epub 2017 Dec 27.
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.
通过使用富含 S 空位的间隙 P 掺杂 CdS（CdS-P）作为光催化剂，在没有任何电子牺牲剂的情况下，成功地实现了纯水的光催化析氢。通过间隙 P 掺杂，S 空位的杂质能级靠近费米能级，并在 CdS-P 中成为有效的电子陷阱能级，这可以改变光生电子的动力学特性，从而延长它们的寿命。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 作为共催化剂，CdS-P 的光催化活性可以进一步提高。
