Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5146063 | International Journal of Hydrogen Energy | 2017 | 11 Pages |
Abstract
A novel visible-light-active CdS@g-C3N4 photocatalyst was synthesized via a chemisorption method. This core@shell structure catalyst exhibited enhanced photocatalytic H2 production activity under visible-light (λ â¥Â 420 nm) irradiation. The nano-sheet g-C3N4 was successfully coated on CdS nanoparticles with intimate contact. When the content of g-C3N4 in the hybridized composite is 3 wt. %, the hydrogen-production rate of the CdS@g-C3N4 is 2.5 and 2.2 times faster than pure CdS and bulk g-C3N4, respectively. Superior stability was also observed in the cyclic runs. The improvement in stability and activity result from the ability of the Ï-conjugated g-C3N4 material in transporting photo-induced holes. The core@shell structure promoted separation of the photo-generated electron-hole pair and accelerated the emigration speed of the hole from the valence band of CdS. This effect also results in a greatly improved amount of hydrogen production. The possible mechanism for the photocatalytic activity and stability of CdS@g-C3N4 are tentatively proposed.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Li Liu, Panru Hu, Wenquan Cui, Xingang Li, Zisheng Zhang,