Abstract
Heterostructured CdS-pillared tetratitanate nanohybrid was fabricated by electrostatically driven self-assembly of the exfoliated tetratitanate nanosheets and CdS nanosol particles. It was revealed that the present nanohybrid is porous with a specific surface area of 65m2g−1 and that the tetratitanate nanosheets were restacked in a well-ordered arrangement with a gallery height of 2.3nm. The formation of an electronic coupling between the titanate nanosheets and the encapsulated CdS pillars was supported by XPS and photocurrent measurements. The nanohybrid exhibits a highly photocatalytic activity of 895μmolh−1g−1 in H2 evolution from water splitting under 300W Xe lamp irradiation, which is about 11 and 7 times higher than its parents H2Ti4O9·H2O and CdS, respectively. Loading 3wt% Pt resulted in that its activity was further improved to 1897μmolh−1g−1. It was showed that the as-prepared nanohybrid has an excellent stability and recurrence performance in hydrogen generation.
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