Authors: Ju Shen Yali Meng Gang Xin
Publish Date: 2011/11/16
Volume: 30, Issue: 1, Pages: 280-283
Abstract
PtCdSTiO2 nanotubes NTs hybrids were synthesized with various combinations of CdS TiO2NTs and Pt by a platinizing facile ion change and sulfurization process at a moderate temperature The samples were characterized by XRD and TEM The photocatalytic activity of the platinized CdS/TiO2 nanotubes hybrid for hydrogen production was evaluated in the aqueous solution containing sodium sulfide and sodium sulfite as hole scavengers under visible light irradiation λ 420 nm The sample prepared by loading CdS on 01 wt PtTiO2NTs 01 wt PtTiO2NTs/CdS could split water to generate more hydrogen than others 04 wt PtCdS/TiO2NTs was far more efficient than other hybrids It was known that efficient charge transfer was one of the key factors of highefficiency hybrid photocatalysts for hydrogen production The results indicate that the charge transfer is sensitively and greatly affected by how the hybrids are organized Direct particletoparticle contact of CdS and TiO2 is basically required to achieve a potential gradient and the Pt particle loaded on the TiO2 particle surface to have the vectorial electron transfer from CdS to TiO2 and last reach the surface of Pt which benefits the evolution of hydrogen by photocatalytic water splitting
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