Journal
SCIENCE BULLETIN
Volume 65, Issue 2, Pages 113-122Publisher
ELSEVIER
DOI: 10.1016/j.scib.2019.10.015
Keywords
CdS nanoparticles; Covalent organic frameworks; Charge transfer dynamics; Hydrogen generation; Photo-deposition
Categories
Funding
- National Natural Science Foundation of China [51938007, 51878325, 51868050, 51622806, 51868052]
- Natural Science Foundation of Jiangxi Province [20162BCB22017, 20165BCB18008, 20171ACB20017, 20171BAB206049]
- Ph.D. research startup foundation of Nanchang Hangkong University [EA201802367]
- foundation of Jiangxi Scientific Committee [DA201902167]
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A facile and effective impregnation combined with photo-deposition approach was adopted to deposit cadmium sulfide (CdS) nanoparticles on CTF-1, a covalent triazine-based frameworks (CTFs). In this system, CTF-1 not only acted as supporter but also served as photocatalyst and electron donor. The performance of the obtained CdS deposited CTF-1 (CdS-CTF-1) nanocomposite was evaluated by H-2 evolution reaction under visible light irradiation. As a result, CdS-CTF-1 exhibited high H-2 production from water, far surpassing the CdS/CTF-1 nanocomposite, in which CdS was deposited via solvothermal method. The high activity of CdS-CTF-1 was attributed to the confined CdS nanoparticles with small size, leading to expose more active sites. In addition, time-resolved spectroscopy indicated that the superior performance of CdS-CTF-1 also can be ascribed to the fast electron transfer rate and injection efficiency (K-ET = 0.18 x 10(9) s(-1), eta(inj) = 39.38%) between CdS and CTF-1 layers, which are 3.83 times faster and 4.84 times higher than that of CdS/CTF-1 nanocomposite. This work represents the first example on using covalent organic frameworks (COFs) as a support and electron-donor for fabricating novel CdS-COF nanocomposite system and its potential application in solar energy transformations. (C) 2019 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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