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The role of fuel to oxidizer ratio in solution combustion synthesis of TiO2 and its influence on photocatalysis

Published online by Cambridge University Press:  03 July 2017

Swapna Challagulla  and
Sounak Roy
Swapna Challagulla
Affiliation:
Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad-500078, India
Sounak Roy*
Affiliation:
Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad-500078, India
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Recently, solution combustion synthetic approach has emerged as a potential route to synthesize a wide range of catalytic oxides. Nano TiO2 was synthesized by solution combustion methods using glycine, urea, and oxalyldihydrazide as fuels. X-ray diffraction and field emission scanning electron microscopy analyses revealed the structural and morphological differences of TiO2 synthesized with different fuels. The oxidizer to fuel ratio from lean to rich conditions also played a crucial role in determining the polymorphic percentage concentration in the synthesized TiO2 powders. However, diffuse reflectance spectroscopy and photoluminescence spectroscopy studies did not show any significant differences in the electronic properties of the synthesized TiO2. As the polymorphic composite phases synergistically influence the catalytic performances, photodegradation of methylene blue (MB) and photo hydrogen production were studied with the synthesized catalysts. The synergistic role crucially depended on the specific reaction. The presence of different TiO2 polymorphs due to difference in fuels during combustion controlled the photocatalytic efficiency of the catalysts toward MB degradation and hydrogen production.

Keywords

solution combustion synthesisfuel to oxidizer ratioTiO2photocatalysismethylene blue degradationH2 production
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 14 , 28 July 2017 , pp. 2764 - 2772
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Scott T. Misture

References

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