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Wide spectrum responsive CdS/NiTiO3/CoS with superior photocatalytic performance for hydrogen evolution

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Abstract

A wide spectrum responsive CdS/NiTiO3/CoS nanocomposite was successfully prepared via a facile one pot reaction and was fully characterized. The as-obtained CdS/NiTiO3/CoS nanocomposite shows absorption in both visible and NIR regions due to the introduction of NiTiO3. The hydrogen (H2) evolved over the CdS/NiTiO3/CoS nanocomposite under whole visible to NIR irradiation in 5 h was 2381 μmol, which is 22-fold that produced over pure CdS. The superior photocatalytic performance over the CdS/NiTiO3/CoS nanocomposite can be ascribed to its wide spectrum response and the formation of a CdS/NiTiO3 heterojunction as well as the deposition of CoS as a cocatalyst for H2 evolution. The formation of the heterojunction of CdS/NiTiO3 to suppress the recombination of photo-generated charge carriers over the CdS/NiTiO3/CoS nanocomposite was well demonstrated by PL studies. Moreover, the photo-corrosion of CdS in the CdS/NiTiO3/CoS nanocomposite induced by the hole-oxidation of lattice S2− can be inhibited due to the morphology change of CdS from nanoparticles in pure CdS to nanoflakes in the CdS/NiTiO3/CoS nanocomposite. This study can provide some guidance for the development of wide spectrum responsive photocatalysts for H2 evolution.

Graphical abstract: Wide spectrum responsive CdS/NiTiO3/CoS with superior photocatalytic performance for hydrogen evolution

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Publication details

The article was received on 12 Mar 2017, accepted on 30 Apr 2017 and first published on 01 May 2017


Article type: Paper
DOI: 10.1039/C7CY00476A
Citation: Catal. Sci. Technol., 2017, Advance Article
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    Wide spectrum responsive CdS/NiTiO3/CoS with superior photocatalytic performance for hydrogen evolution

    Z. Wang, J. Peng, X. Feng, Z. Ding and Z. Li, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY00476A

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