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Novel Zn0.8Cd0.2S@g-C3N4 core-shell heterojunctions with twin structure for enhanced visible-light-driven photocatalytic hydrogen generation

Abstract

A series of novel core-shell nanocomposites composed of twin nanocrystal Zn0.8Cd0.2S solid solution and porous g-C3N4 nanosheets were fabricated by a combined ultrasonication and solvothermal method. The photocatalytic hydrogen production activities of these samples were evaluated with co-catalyst-free in water under visible light irradiation (λ ≥ 420 nm). It is found that the H2 production rates of Zn0.8Cd0.2S@g-C3N4-10wt% sample was 2351.18 µmol•h-1•g-1, which is 146.0 and 5.7 times higher than that of pristine porous g-C3N4 nanosheets and Zn0.8Cd0.2S solid solution. Further detailed characterization reveals that the drastically enhanced and stable light-to-hydrogen energy conversion can be attributed to not only efficient spatial separation of the photo-induced electrons and holes resulted from the synergetic effects of twined homojunctions and core-shell heterojunctions, but also the intimate contact at molecular scale between porous g-C3N4 shell andZn0.8Cd0.2S core. Therefore, this work puts forward a promising way to obtain unique core-shell heterojunctions with the excellent stability and activity during the photoreaction process.

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Publication details

The article was received on 21 Jun 2018, accepted on 04 Aug 2018 and first published on 09 Aug 2018


Article type: Paper
DOI: 10.1039/C8TA05927F
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Novel Zn0.8Cd0.2S@g-C3N4 core-shell heterojunctions with twin structure for enhanced visible-light-driven photocatalytic hydrogen generation

    F. Tian, D. Hou, F. Tang, M. Deng, X. Qaio, Q. zhang, T. Wu and D. Li, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05927F

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