An Effective Utilization of Solar Energy: Enhanced Photodegradation Efficiency of TiO 2 /Graphene-Based Composite

Peipei Huo, Peng Zhao, Yin Wang, Bo Liu and Mingdong Dong
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Peipei Huo: Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo 255000, China
Peng Zhao: School of Materials Science and Engineering, Shandong University of Technology, Xincun West Road 266, Zibo 255000, China
Yin Wang: Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark
Bo Liu: Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo 255000, China
Mingdong Dong: Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark

Energies, 2018, vol. 11, issue 3, 1-20

Abstract: The integration of graphene-based material and TiO 2 can greatly enhance the photodegradation efficiency toward contaminants in the environment. As the morphology of TiO 2 varies from a 0D nanoparticle (NP) and a 1D Nanotube (NT)/Nanowire (NW) to a 2D nanosheet, the contact between TiO 2 and graphene-based material would increasingly intensify and the distribution of TiO 2 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 TiO 2 /Graphene composites.

Keywords: TiO 2 /Graphene composite; photocatalysis; electron-hole pair; photodegradation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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