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Biomolecule-mediated hydrothermal synthesis of polyoxoniobate–CdS nanohybrids with enhanced photocatalytic performance for hydrogen production and RhB degradation

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Abstract

Using a biomolecule of L-cystine as the sulfur source and coordinating agent, polyoxoniobate–CdS nanohybrids were successfully synthesized under mild hydrothermal conditions. The adsorption of ammonium group (–NH2) in L-cystine molecular structure on the surface of CdS renders the amine-anchored CdS positively charged, which readily combines with the negatively charged polyoxoniobate clusters in terms of the electrostatic interaction. The as-obtained polyoxoniobate–CdS nanohybrids exhibit much superior activity for H2 evolution and RhB degradation under visible light as compared to the unhybridized CdS and polyoxoniobate. After co-loading Nb6 and NiS as cocatalyst, the H2-evolution activity of the nanohybrids is further increased up to 39 times as high as that of naked CdS, which can be attributed to an enhanced electron-transfer by adopting polyoxoniobate as electron-acceptor to retard the electron–hole recombination. The work may open an avenue for the green synthesis of cost-effective POMs-CdS nanohybrid photocatalysts for solar energy applications.

Graphical abstract: Biomolecule-mediated hydrothermal synthesis of polyoxoniobate–CdS nanohybrids with enhanced photocatalytic performance for hydrogen production and RhB degradation

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Publication details

The article was received on 11 May 2017, accepted on 03 Jul 2017 and first published on 03 Jul 2017


Article type: Paper
DOI: 10.1039/C7DT01729D
Citation: Dalton Trans., 2017, Advance Article
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    Biomolecule-mediated hydrothermal synthesis of polyoxoniobate–CdS nanohybrids with enhanced photocatalytic performance for hydrogen production and RhB degradation

    M. Liu, H. Chen, H. Zhao, Y. He, Y. Li, R. Wang, L. Zhang and W. You, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT01729D

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