| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 45259 | Applied Catalysis B: Environmental | 2016 | 8 Pages |
•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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