A nanohybrid of CdTe@CdS nanocrystals and titania nanosheets with p-n nanojunctions for improved visible light-driven hydrogen production

Xing, Zheng and Zong, Xu and Zhu, Yian and Chen, Zhi Gang and Bai, Yang and Wang, Lianzhou (2016) A nanohybrid of CdTe@CdS nanocrystals and titania nanosheets with p-n nanojunctions for improved visible light-driven hydrogen production. Catalysis Today, 264. pp. 229-235. ISSN 0920-5861

Abstract

A nanohybrid photocatalyst composed of CdTe@CdS nanocrystals and single-layered exfoliated titania nanosheets was synthesized through a well-defined restacking approach. The nanohybrid possessed an expanded layered structure, with ultrathin titania nanosheets randomly restacked upon each other and CdTe@CdS nanocrystals sandwiched between the nanosheets. The introduction of CdTe@CdS nanocrystals not only extended the light absorption of the photocatalyst to the visible range, but also formed p-n nanojunctions in the nanohybrid. The resultant materials containing same amount of CdTe@CdS nanocrystals exhibited over 43 times higher activity than pure CdTe@CdS nanocrystals for hydrogen production under visible light irradiation (λ > 420 nm) while titania nanosheets alone were not capable of producing any hydrogen under the same conditions. The superior photocatalytic efficiency of the nanohybrid can be attributed to the effective charge separation, which is achieved by the synergetic effect of proper energy bands alignment and p-n nanojunctions.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 21 Jun 2017 04:44
Last Modified: 21 Jun 2017 04:44
Uncontrolled Keywords: CdTe@CdS nanocrystals; Hydrogen production; Nanohybrid; Photocatalysis; Titania nanosheets; CdS nanocrystals; Layered Structures; Nano hybrids; Photocatalytic efficiency; Synergetic effect; Titania nanosheet; Visible-light irradiation; Visible-light-driven; Catalysts/Zeolites; Chemicals-Processing Catalysts; Petroleum Refining and Petrochemicals;
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030399 Macromolecular and Materials Chemistry not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1016/j.cattod.2015.08.007
URI: http://eprints.usq.edu.au/id/eprint/31670

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