Selective Solar Photocatalysis by High Temperature Stable Anatase TiO2

[Display omitted] •Selective solar photocatalysis of high temperature stable anatase TiO2 is reported for first time.•TiO2 samples prepared selectively degraded cationic methylene blue (MB) over anionic methyl orange (MO) from an aqueous mixture of MB and MO dye. High temperature stable nanocrystall...

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Bibliographic Details
Published in:Solar energy 2018-01, Vol.160, p.10-17
Main Authors: Shahnas Beegam, M., Ullattil, Sanjay Gopal, Periyat, Pradeepan
Format: Article
Language:English
Subjects:
Ammonium
Anatase
Diffuse reflectance spectroscopy
Dyes
Fourier transforms
High temperature
Methylene blue
Photocatalysis
Roasting
Sol-gel processes
Solar energy
Temperature effects
Titanium dioxide
X ray photoelectron spectroscopy
Zeta potential
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Summary:[Display omitted] •Selective solar photocatalysis of high temperature stable anatase TiO2 is reported for first time.•TiO2 samples prepared selectively degraded cationic methylene blue (MB) over anionic methyl orange (MO) from an aqueous mixture of MB and MO dye. High temperature stable nanocrystalline anatase TiO2 is well known for its aqueous mediated non-selective photocatalysis. Here we first report the selective solar photocatalysis of high temperature stable anatase TiO2, prepared through a modified sol–gel technique using titanium isopropoxide and ammonium fluoride. As synthesised samples calcined at 500 and 700 °C were characterized by various techniques such as XRD, FTIR, TEM, diffuse reflectance spectroscopy, BET surface area analyser and XPS. TiO2 samples calcined at 500 and 700 °C (TNF500 & TNF700) selectively degraded cationic methylene blue (MB) over anionic methyl orange (MO) from an aqueous mixture of MB and MO dye. The selective photocatalysis was well accounted by zeta potential measurements.
ISSN:0038-092X
1471-1257
DOI:10.1016/j.solener.2017.11.065