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Preparation and photocatalytic performance of transparent titania film from monolayer titania quantum dots

Paper ID Volume ID Publish Year Pages File Format Full-Text
45259 46407 2016 8 PDF Available
Title
Preparation and photocatalytic performance of transparent titania film from monolayer titania quantum dots
Abstract

•Novel titania quantum dots (MTQDs)are used to prepare titania film.•MTQDs is monolayer and the thickness is only ∼0.4 nm.•Self-assembly behavior and coffee-ring effect suppression of MTQDs are discussed.•Transparent titania film is obtained at room temperature.•Film photocatalytic performance is highly promoted by graphene loading.

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 sphere-shaped nanoTiO2/graphene composite indicated that, the face-to-face contact mode between MTQDs and graphene may contribute to the high activity of MTQDs/graphene composite.

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Keywords
Titania quantum dots; Ultrathin film; Graphene; Photocatalytic performance; Coffee-ring effect
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Preparation and photocatalytic performance of transparent titania film from monolayer titania quantum dots
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 180, January 2016, Pages 416–423
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us