Influence of graphene synthesizing techniques on the photocatalytic performance of Graphene/TiO2 nanocomposites
Artikel i vetenskaplig tidskrift, 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.


Raja Sellappan

Chalmers, Teknisk fysik, Kemisk fysik

Jie Sun

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Augustinas Galeckas

Universitetet i Oslo

Niclas Lindvall

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Avgust Yurgens

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Andrej Yu Kuznetsov

Universitetet i Oslo

Dinko Chakarov

Chalmers, Teknisk fysik, Kemisk fysik

Physical Chemistry Chemical Physics

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

Vol. 15 37 15528-15537


Nanovetenskap och nanoteknik




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