Effects in Band Gap for Photocatalysis in TiO2 Support by Adding Gold and Ruthenium

One of the key features of a nano catalyst for photocatalysis is the band gap, because, through its analysis, the potential of the catalyst can be determined. In this investigation, the impact on the band gap of different catalysts made by the sol–gel method, compared with TiO2 P25 Sigma-Aldrich, sh...

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Bibliographic Details
Published inProcesses Vol. 8; no. 9; p. 1032
Main Authors Fonseca-Cervantes, Omar Ricardo, Pérez-Larios, Alejandro, Romero Arellano, Víctor Hugo, Sulbaran-Rangel, Belkis, Guzmán González, Carlos Alberto
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2020
Subjects
Catalysts
Energy gap
Ethanol
Gold
Metals
Nanoparticles
Oxidation
Photocatalysis
Pollutants
Reagents
Ruthenium
Sol-gel processes
Titanium
Titanium dioxide
Valence
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Summary:One of the key features of a nano catalyst for photocatalysis is the band gap, because, through its analysis, the potential of the catalyst can be determined. In this investigation, the impact on the band gap of different catalysts made by the sol–gel method, compared with TiO2 P25 Sigma-Aldrich, showing the effect of using gold or ruthenium as a metal supported on TiO2, with two different dosage percentages of 1 and 3 percent, was analysed. Additionally, two oxidation states of the catalyst, the reduced form and the oxidized form of the metal, were used to see the effect on the band gap. The experiments show that the gold addition has a higher beneficial effect on the band gap for the UV region (ultra violet region), and the ruthenium addition has a higher beneficial effect for the UV/visible region. The preferred oxidation state for the band gap was the oxidized state. The characterisation of the catalyst provided an insight into the relation between the band gap and the catalyst itself.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr8091032