Publikationsdatum:
2019
Beschreibung:
〈p〉Publication date: 15 November 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Journal of Alloys and Compounds, Volume 809〈/p〉
〈p〉Author(s): Yunxiang Tang, Dafeng Zhang, Xiaoxue Qiu, Lei Zeng, Baoxu Huang, Hong Li, Xipeng Pu, Yanling Geng〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉Photocatalytic hydrogen (H〈sub〉2〈/sub〉) evolution is a greatly promising strategy for solar to H〈sub〉2〈/sub〉 conversion. However, photocatalytic activity of single photocatalyst is limited due to the fast recombination of photogenerated charge carriers. Recently, various heterojunction photocatalysts have been constructed to improve photocatalytic activity. Herein, a novel NiCo〈sub〉2〈/sub〉O〈sub〉4〈/sub〉/Zn〈sub〉0.1〈/sub〉Cd〈sub〉0.9〈/sub〉S (NCO/ZCS) p-n heterojunction photocatalyst was fabricated via a simple calcination method. The optimized NiCo〈sub〉2〈/sub〉O〈sub〉4〈/sub〉 content is 3 wt%, and corresponding NCO/ZCS shows the maximum H〈sub〉2〈/sub〉 evolution rate of 34.4 mmol g〈sup〉−1〈/sup〉 h〈sup〉−1〈/sup〉 under visible light irradiation, which is over 4.9 times higher than that of pure ZCS, and has the apparent quantum efficiency of 58.8% at 420 nm. The improved photoactivity of NCO/ZCS can be attributed to the construction of NCO/ZCS p-n heterojunction. In addition, a possible mechanism for photocatalytic H〈sub〉2〈/sub〉 evolution of NCO/ZCS p-n heterojunction was proposed.〈/p〉〈/div〉
〈/div〉
Print ISSN:
0925-8388
Digitale ISSN:
1873-4669
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
