期刊
MOLECULAR CATALYSIS
卷 485, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mcat.2020.110832
关键词
ZIF-67; ZnCdS; Metal-organic framework; Photocatalyst hydrogen evolution
资金
- Chinese National Natural Science Foundation [21862002, 41663012]
- Ningxia lowgrade resource high value utilization and environmental chemical integration technology innovation team project, North Minzu University
The exposure of rich active sites and the rapid transfer of photo-induced electron-hole pairs are important prerequisites for a photocatalyst with good performance. In this work, a low cost and high active composite Zn0.5Cd0.5S/ZIF-67 was successfully prepared by a hybrid growth method. The dodecahedron ZIF-67 with a very regular surface provides sufficient area for the dispersion of Zn0.5Cd0.5S(ZCS) nanoparticles, which greatly decreases the serious aggregation effect of ZCS particles, and is conductive to further exposing more active sites in the photocatalysis hydrogen evolution process. Moreover, compared with pure Zn0.5Cd0.5S/ZIF-67 composite shows more significant ability of capture visible light in the range of 515-600 nm. The highest hydrogen production rate can reached 23264.6 mu mol g(-1) h(-1) under visible light irradiation and the apparent quantum efficiency can reached 6.95 % at 420 nm visible light irradiation. Because of the matched valence band position for ZIF-67 and ZCS, photo-generated carrier recombination rate is greatly inhibited and photo-excited electron-hole pair separation and transfer is accelerated. By analyzing a series of characterization results (SEM, TEM, XPS, PL, UV and DFT), the possible mechanism of photocatalytic water-spitting of the composite to produce hydrogen is proposed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据