Current Graphene Science

Zhen Zhou  
Nankai University
P.R. China

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Graphene/Porous Beta TiO2 Nanocomposites Prepared Through a Simple Hydrothermal Method

Author(s): Yuqin Zhang, Hengcong Tao, Yunnan Gao, Tao Ma, Jingjing Ding, Zhenyu Sun.

Graphical Abstract:


Abstract:

Background: Despite recent advances in the construction of graphene/TiO2 hybrids with tunable structure and morphology, the synthesis of graphene/beta TiO2 nanocomposites with welldefined morphology remains a challenge.

Objective: We report for the first time a novel array structure consisting of porous ultrathin beta TiO2 nanosheets grown on few-layer graphene.

Method: Pristine few-layer graphene (FLG) was first effectively exfoliated and dispersed in ethylene glycol. Then porous beta TiO2 nanosheets were synthesized via one-step thermal hydrolysis of TiCl3, grown vertically on the surface of FLG stabilized by ethylene glycol at 150°C for 3 h.

Results: The morphology and microstructure of these resulting graphene/beta TiO2 nanocomposites were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning and transmission electron microscopy, and N2 adsorption/desorption. High-resolution transmission electron microscopy (HRTEM) and N2 adsorption/desorption measurements illustrated the formation of mesopores with mean diameter of 3.8 nm in these TiO2 (B) nanosheets. XRD revealed that the presence of FLG played a significant role in inhibiting the phase transformation of beta TiO2 to anatase during annealing at 300ºC for 1 h in air which otherwise occurs rapidly without FLG.

Conclusion: In summary, we have presented a simple approach to synthesize graphene/porous beta TiO2 nanocomposites with tunable morphology. It is expected that this novel structure would be an interesting photocatalyst for the conversion of solar energy to chemical fuels.

Keywords: Beta-titania, few-layer graphene, hydrolysis, nanosheet, nanocomposite, porous.

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Article Details

VOLUME: 1
ISSUE: 1
Year: 2017
Page: [64 - 70]
Pages: 7
DOI: 10.2174/2452273201666161026162838