Abstract
The integration of graphene-based material and TiO2 can greatly enhance the photodegradation efficiency toward contaminants in the environment. As the morphology of TiO2 varies from a 0D nanoparticle (NP) and a 1D Nanotube (NT)/Nanowire (NW) to a 2D nanosheet, the contact between TiO2 and graphene-based material would increasingly intensify and the distribution of TiO2 on the graphene sheets becomes more uniform. Both factors lead to better photocatalytic performance. The graphene commonly possesses the intrinsic properties of higher surface area, more efficient charge transfer, inhibited electron-hole pairs (EHPs)’ recombination and extended light absorption range. With the assistance of some functional surfactants, the photodegradation performance can be further improved according to more specific requirements such as the photodegradation selectivity. This paper provides an overview of recent progress regarding the method and mechanism of graphene in various TiO2/Graphene composites.
Highlights
In the modern scenario of research interests, solutions to climate change and the greenhouse effect appear to be the most investigated field in the scientific community, which can be attributed to the burning of fossil fuels
Except the three common traits of Reduced graphene oxide (rGO) in the process of graphene-based semiconductor photocatalysis, which are trapping and transferring of photogenerated charges, increasing adsorption of contaminants and extending light absorption, Wu et al proposed that the strong photothermal effect (PTE) of rGO is another essential factor influencing the photocatalytic performance
When the TiO2 /Graphene oxide” (GO) hybrid was used to decolorize methyl orange (MO), it was excited strong photothermal effect (PTE) of rGO is another essential factor influencing the photocatalytic by visible light irradiation (>400 nm), that is, both TiO2 and semiconductor formed by GO could be performance
Summary
In the modern scenario of research interests, solutions to climate change and the greenhouse effect appear to be the most investigated field in the scientific community, which can be attributed to the burning of fossil fuels. Except the three common traits of rGO in the process of graphene-based semiconductor photocatalysis, which are trapping and transferring of photogenerated charges, increasing adsorption of contaminants and extending light absorption, Wu et al proposed that the strong photothermal effect (PTE) of rGO is another essential factor influencing the photocatalytic performance. Cai semiconductor photocatalysis, which are trapping and transferring of photogenerated charges, et al studied the influence of the concentration of GO on the photocatalytic activity of TiO2 /GO increasing adsorption of contaminants and extending light absorption, Wu et al proposed that the composite. When the TiO2 /GO hybrid was used to decolorize methyl orange (MO), it was excited strong photothermal effect (PTE) of rGO is another essential factor influencing the photocatalytic by visible light irradiation (>400 nm), that is, both TiO2 and semiconductor formed by GO could be performance.
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