Influence of graphene synthesizing techniques on the photocatalytic performance of Graphene/TiO2 nanocomposites
Journal article, 2013

Model photocatalysts composed of TiO2/graphene nanocomposites are prepared to address the role of graphene quality on their photocatalytic performance. Graphene is synthesized by catalyst-assisted chemical vapor deposition (CVD), catalyst-free CVD and solution processing methods. TiO2 is prepared by reactive magnetron sputtering and subsequent annealing. Fabricated model photocatalysts are with different morphology and physical properties, as revealed by spectrophotometry, atomic force microscopy, x-ray photoelectron spectroscopy, Raman spectroscopy, photoluminescence, and four-probe electrical measurements. All graphene–containing composites are with significantly higher photocatalytic activity compared to bare TiO2 films in the gas phase methanol photooxidation tests. The activity is proportional to the electrical conductivity and surface roughness of the respective carbon structure, which in turn depends on the preparation methods. The mechanisms of enhancement are further assessed by comparison with the performance of reference TiO2/graphitic-carbon and TiO2/Au thin films.

Author

Raja Sellappan

Chalmers, Applied Physics, Chemical Physics

Jie Sun

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Augustinas Galeckas

University of Oslo

Niclas Lindvall

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Avgust Yurgens

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Andrej Yu Kuznetsov

University of Oslo

Dinko Chakarov

Chalmers, Applied Physics, Chemical Physics

Physical Chemistry Chemical Physics

1463-9076 (ISSN) 1463-9084 (eISSN)

Vol. 15 37 15528-15537

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Energy

Materials Science

Subject Categories

Physical Chemistry

Nano Technology

Condensed Matter Physics

DOI

10.1039/C3CP52457D

More information

Latest update

5/8/2018 6