A Review on the Progress and Future of TiO 2 /Graphene Photocatalysts

Amara Nasir, Sadia Khalid, Tariq Yasin and Anca Mazare ()
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Amara Nasir: Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), PO Nilore, Islamabad 45650, Pakistan
Sadia Khalid: Nanoscience & Technology Department, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad 45320, Pakistan
Tariq Yasin: Department of Chemistry, Pakistan Institute of Engineering and Applied Sciences (PIEAS), PO Nilore, Islamabad 45650, Pakistan
Anca Mazare: Department of Materials Science WW4-LKO, Friedrich Alexander University of Erlangen Nürnberg, Martensstrasse 7, 91058 Erlangen, Germany

Energies, 2022, vol. 15, issue 17, 1-33

Abstract: TiO 2 is seen as a low cost, well-known photocatalyst; nevertheless, its sluggish charge kinetics does limit its applications. To overcome this aspect, one of the recent approaches is the use of its composites with graphene to enhance its photoactivity. Graphene-based materials (nanosheets, quantum dots, etc.) allow for attachment with TiO 2 nanostructures, resulting in synergistic properties and thus increasing the functionality of the resulting composite. The current review aims to present the marked progress recently achieved in the use of TiO 2 /graphene composites in the field of photocatalysis. In this respect, we highlight the progress and insights in TiO 2 and graphene composites in photocatalysis, including the basic mechanism of photocatalysis, the possible design strategies of the composites and an overview of how to characterize the graphene in the mixed composites. The use of composites in photocatalysis has also been reviewed, in which the recent literature has opened up more questions related to the reliability, potential, repeatability and connection of photocatalytic mechanisms with the resulting composites. TiO 2 /graphene-based composites can be a green light in the future of photocatalysis, targeting pollution remediation, energy generation, etc.

Keywords: titanium dioxide; graphene; nanomaterials; photocatalysis (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: 2022
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