A review on graphene–TiO2 and doped graphene–TiO2 nanocomposite photocatalyst for water and wastewater treatment. Issue 1 (1st January 2017) - Bhanvase, B. A.
ABSTRACT: TiO2 is a more effective photocatalyst for the photocatalytic degradation of organic pollutants. However it shows more reactivity under UV light and around 5% of solar spectrum contains UV radiations. A new approach for the degradation of pollutants present in wastewater is suggested by making use of nanocomposite photocatalysts. The technique has potential for the treatment of wastewater because of the use of doped graphene-based nanocomposite photocatalysts. Graphene is a one-atom-thick planar sheet of sp 2 -bonded carbon atoms that are densely packed in a honeycomb crystal lattice. Furthermore, graphene has high electron mobility and therefore it will supress the recombination of the electron-hole pair formed which in turn improves the effectiveness of the graphene-TiO2 photocatalyst. In addition, development of doped graphene-TiO2 photocatalyst will be useful as it can be effective for the degradation of pollutants in the visible sunlight. Recently, there has been an increase in interest in the preparation of high performance graphene-based TiO2 photocatalyst with doping of it using metal and non-metal ions. In this review, the preparation method and application of TiO2, graphene-TiO2 and doped raphene-TiO2 photocatalyst are presented.