Polyacrylamide gel synthesis and photocatalytic properties of TiO2 nanoparticles

In this study, a polyacrylamide gel route was introduced to synthesize TiO 2 nanoparticles. The influence of synthesis conditions on the properties of products was investigated. It is found that the samples prepared at the calcination temperature of 400 °C crystallize majorly in the anatase phase wi...

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Bibliographic Details
Published in:	Journal of sol-gel science and technology 2013-05, Vol.66 (2), p.324-329
Main Authors:	Xian, T., Yang, H., Di, L. J., Chen, X. F., Dai, J. F.
Format:	Article
Language:	eng
Subjects:	Acetic acid Acrylamide Anatase Catalysis Catalytic activity Ceramics Chelating Chelating agents Chelation Chemistry Chemistry and Materials Science Colloidal gels. Colloidal sols Colloidal state and disperse state Composites Degradation Dependence Dyes Ethanol Ethyl alcohol Exact sciences and technology General and physical chemistry Glass Inorganic Chemistry Materials Science Morphology Nanoparticles Nanotechnology Natural Materials Optical and Electronic Materials Orange II Original Paper Photocatalysis Photochemistry Physical and chemical studies. Granulometry. Electrokinetic phenomena Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Polyacrylamides Rutile Synthesis Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Titanium dioxide Ultraviolet radiation
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Summary:	In this study, a polyacrylamide gel route was introduced to synthesize TiO 2 nanoparticles. The influence of synthesis conditions on the properties of products was investigated. It is found that the samples prepared at the calcination temperature of 400 °C crystallize majorly in the anatase phase with a minor rutile phase. The second rutile phase has a dependence on the chelating agent, which is formed more readily when using acetic acid as the chelating agent. The introduction of acrylamide and glucose to the precursor solution shows the capability of improving the particle morphology, and the resulted particles are uniformly shaped like spheres. The photocatalytic activity of the prepared TiO 2 samples was evaluated by the degradation of acid orange 7 under 254 nm ultraviolet irradiation, revealing that they exhibit a good photocatalytic activity. Ethanol was used as a · OH scavenger to investigate its effect on the photocatalytic efficiency as well as the · OH radical yields. Based on the experimental results, · OH radical is suggested to be the dominant active species responsible for the dye degradation.
ISSN:	0928-0707 1573-4846