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Sulfur vacancies rich CdS based composite photocatalyst with g-C3N4 as matrix derived from Cd-S cluster assembled supramolecular network for H2 production and VOCs removal

Abstract

By calcination, sulfur vacancies rich CdS based composite photocatalyst with graphitic carbon nitride (g-C3N4) as matrix has been synthesized successfully from tetranuclear Cd-S cluster assembled supramolecular network. In this photocatalyst (CdS@g-C3N4), CdS nanoparticles with the size about 5 to 8 nm disperse homogenously in g-C3N4 matrix. During calcination, some coordinated nitrogen atoms dope in the lattice of CdS and replace sulfur atoms, which generates a large number of sulfur vacancies. Under visible light irradiation, CdS@g-C3N4 exhibits very excellent H2 production activity with the rate achieving as high as 19.88 mmol•g-1•h-1 without the existence of Pt cocatalyst. Its H2 production ability keeps stable for 30 h, which does not decay. Besides H2 production, CdS@g-C3N4 also shows excellent photocatalytic activity for Volatile Organic Compounds (VOCs) degradation. For a photocatalyst, chemical content plays an important role in its performance. Here, the influence of sulfur vacancies on H2 production and VOCs degradation is discussed in detail. We expect the sulfur vacancies rich CdS@g-C3N4 can act as an efficient material for H2 production and indoor air purification.

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Publication details

The article was received on 28 Dec 2017, accepted on 02 Feb 2018 and first published on 02 Feb 2018


Article type: Paper
DOI: 10.1039/C7DT04912A
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Sulfur vacancies rich CdS based composite photocatalyst with g-C3N4 as matrix derived from Cd-S cluster assembled supramolecular network for H2 production and VOCs removal

    Y. Wang, X. Xu, W. Lu, Y. Huo and L. Bian, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C7DT04912A

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