Preparation of Graphene and γ-Fe2O3 Doped Titanium Dioxide and its Photocatalytic Properties

De Qiang Chen; Yang Li; Yi Qun Chen

doi:10.4028/www.scientific.net/AMM.295-298.447

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 295-298Preparation of Graphene and γ-Fe2O3 Doped Titanium...

Preparation of Graphene and γ-Fe₂O₃ Doped Titanium Dioxide and its Photocatalytic Properties

Abstract:

In this paper graphene is used to improve absorption rate of nano-titanium dioxide under visible light, meanwhile titanium dioxide is doped with superparamagnetism nano-powder of γ-Fe2O3 to modify the recovery of the photocatalyst. Gradually the increasing content of grapheme promotes the removal efficiency and correspondingly. Excitation condition is reduced and the photocatalysis property under visible light is improved and recycle rate of the titanium dioxide is effective promoted after the dispose. The effect of photocatalytic degradation of methylene blue is used to evaluate the photocatalytic activity. The methylene blue degradation rate raised from 53.4% to 85.9% with the increasing graphene load from 5% to 20% under visible light. The degradation efficiency of methylene blue decreased to 15% without the graphene load. The recovery rate of the photocatalyst can achieve 95% above. Graphene oxide works as the electron acceptor and photosensitizer to efficiently enhance the dye photodecomposition.

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Applied Mechanics and Materials (Volumes 295-298)

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447-451

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https://doi.org/10.4028/www.scientific.net/AMM.295-298.447

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Online since:

February 2013

Authors:

De Qiang Chen, Yang Li, Yi Qun Chen

Keywords:

Catalyst Reactivation, Graphen, Methylene Blue, Titanium Dioxide (TiO₂), γ-Fe₂O₃

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