Enhancement of photocatalytic H2 evolution over TiO2 nano-sheet films by surface loading NiS nanoparticles
- Authors: Liu Y.1, Tang C.1
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Affiliations:
- Department of Chemical Engineering
- Issue: Vol 90, No 5 (2016)
- Pages: 1042-1048
- Section: Physical Chemistry of Nanoclusters and Nanomaterials
- URL: https://journals.rcsi.science/0036-0244/article/view/168230
- DOI: https://doi.org/10.1134/S003602441605037X
- ID: 168230
Cite item
Abstract
NiS/TiO2 nano-sheet films (NiS/TiO2 NSFs) photocatalysts were prepared by loading NiS nanoparticles as noble metal-free cocatalysts on the surface of TiO2 films through a solvothermal method. The prepared samples were characterized by XRD, SEM, EDS, UV–Vis absorption spectra and XPS analysis. The photocatalytic H2 evolution and photoluminescence spectroscopy (PL) experiments indicated that the NiS cocatalysts could efficiently promote the separation of photogenerated charge carriers in TiO2 and consequently enhance the H2 evolution activity. The hydrogen yield obtained from the optimal sample reached 4.31 μmol cm–2 at 3.0 h and the corresponding energy efficiency was about 0.26%, which was 21 times higher than that of pure TiO2 NSF. A possible photocatalytic mechanism of NiS cocatalyst on the improvement of the photocatalytic performance of TiO2 NSF was also proposed.
About the authors
Yaopeng Liu
Department of Chemical Engineering
Email: tcn2007@126.com
China, Xi’an, 710300
Chunni Tang
Department of Chemical Engineering
Author for correspondence.
Email: tcn2007@126.com
China, Xi’an, 710300