石墨烯是一种新型的碳纳米材料,具有超大的比表面积和优良的导电性能,将石墨烯与TiO2复合可显著提高复合材料的光催化性能,在光催化领域具有广泛的应用前景.主要介绍了石墨烯/TiO2复合纳米材料的制备方法以及在光催化降解有机污染物方面的应用,并分析了石墨烯/TiO2复合材料促进光催化机理,最后对石墨烯/TiO2复合光催化剂未来的发展趋势提出了展望.%Graphene is a new kind of carbon nano-materials with a large specific surface area and excellent electrical conductivity. When it is incorporated into TiO2 semiconductor to form a composite materials, TiO2 photocatalytic performance could be greatly enhanced and the composite has extensive application prospect in the field of photocatalysis. Graphene in titanium dioxide/graphene nanocomposites can promote effectively separation of electron and hole, and enhance the absorption efficiency of TiO2 surface for organic pollutions in certain extent. In this review, the preparation methods of graphene /TiO2 composite nanomaterials and their application in photocatalytic degradation of organic pollutants are reviewed. And the mechanism of photocatalytic enhancement by graphene/TiO2 composites is also analyzed. Finally, the future prospect on the trends of graphene/TiO2 composite photocatalyst is also given.
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