金红石相TiO2-石墨烯复合材料的制备及其光催化性能

doi:10.3866/PKU.WHXB201211022

Abstract

Abstract:

In this work, graphene oxide (GO) was prepared from natural flake graphite by the modified Hummers method. A series of composites consisting of rutile TiO₂ and graphene (rGO-TiO₂) were synthesized via a one-step hydrothermal reaction of graphene oxide and titanium isopropylate. The influence of the amount of graphene oxide on the photocatalytic activity of the rGO-TiO₂ composites was studied. The photocatalysts were characterized by Brunauer-Emmett-Teller sorption (BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, UV-Vis absorbance spectroscopy, and photoluminescence (PL) spectroscopy. The as-formed TiO₂ was formed in the rutile phase with a needle-cluster structure, and dispersed uniformly on the surface of graphene sheets. The composites possess higher specific areas than pure rutile TiO₂. The photo-degradation performance of Rhodamine B and methyl orange by the rGO-TiO₂ composites under ultraviolet and visible light was studied. The results indicated that rGO-TiO₂ composites prepared with 0.5 mg·mL^-1 of graphene oxide had the greatest photocatalytic activity.

Key words: Rutile TiO₂, Graphene, Hydrothermal method, Photocatalysis, Organic pollutants

MSC2000:

O643

GAN Yong-Ping, QIN Huai-Peng, HUANG Hui, TAO Xin-Yong, FANG Jun-Wu, ZHANG Wen-Kui. Preparation and Photocatalytic Activity of Rutile TiO₂-Graphene Composites[J].Acta Phys. -Chim. Sin., 2013, 29(02): 403-410.

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Preparation and Photocatalytic Activity of Rutile TiO₂-Graphene Composites

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