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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 785-786Assembling of Composite of Ag/TiO2/Eu-MCM with...

Assembling of Composite of Ag/TiO₂/Eu-MCM with Enhanced Photocatalytic Activity

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Abstract:

Ag/TiO₂/Eu-MCM composite was prepared by a nanofilm of silver coating on a nanofilm of anatase TiO₂assembled onto the internal and external pore surface of a hierarchical micro/meso/macroporous molecular sieve Eu-MCM. The composites Ag/TiO₂/Eu-MCM exhibited significant photocatalytic characteristics with more than four times higher UV-Vis-induced catalytic degradation for phenol than that of pure TiO₂. The result is attributed to the composites possess vast specific surface areas, big pore width in favor of mass transfer, strong absorbance of nanofilm silver to UV-Vis light, rapid photoelectron transfer from excited nanofilm of TiO₂ to silver nanofilm, and reduction of the recombination probability of hole and photoelectron. There exists an excellent linear correlation with a correlation coefficient 0.979 between photocatalysis and fluorescence of the composite. A photocatalytic intermediate benzoquinone was measured using HPLC techniques during the process of photocatalytic degradation phenol under a weak UV-Vis radiation condition that indicated organic phenol was first oxidized into benzoquinone and finally degraded into inorganic species of carbon dioxide and water.

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Periodical:

Advanced Materials Research (Volumes 785-786)

Pages:

593-606

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.785-786.593

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Online since:

September 2013

Authors:

Wei Yin*

Keywords:

Assembling, Composite, Eu-MCM, Photocatalysis, Silver, Titanium Dioxide (TiO₂)

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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