Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 180, Issue -, Pages 416-423Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2015.06.049
Keywords
Titania quantum dots; Ultrathin film; Graphene; Photocatalytic performance; Coffee-ring effect
Funding
- National Key Basic Research and Development Program [2009CB220000]
- National Natural Science Foundation of China [20973110]
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By using monolayer titania quantum dots (MTQDs) colloid, a continuous and transparent ultrathin titania film was prepared simply by drop-cast or spray coating method at room temperature. The formation of this even and ultrathin film was not only because of the very thin thickness of two-dimensional MTQDs, but also because of the suppression of coffee-ring effect. The self-assembly behaviors of MTQDs were examined by AFM and the reason for the suppression of coffee-ring effect was discussed in detail. Furthermore, the photocatalytic performance of this MTQDs film was evaluated and an improvement was achieved by loading graphene. Comparison between MTQDs/graphene composite and sphereshaped nanoTiO(2)/graphene composite indicated that, the face-to-face contact mode between MTQDs and graphene may contribute to the high activity of MTQDs/graphene composite. (C) 2015 Elsevier B.V. All rights reserved.
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