Preparation of Photocatalyst of Nano-TiO2 Coating on SiO2 Carrier and its Photocatalytic Activity

You Liang Liu; Chang Chun Cao; Jie Chen

doi:10.4028/www.scientific.net/AMR.777.77

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 777Preparation of Photocatalyst of Nano-TiO2 Coating...

Preparation of Photocatalyst of Nano-TiO₂ Coating on SiO₂ Carrier and its Photocatalytic Activity

Abstract:

The photocatalytic efficiency of TiO₂ can be significantly improved by loading TiO₂ on adsorption carriersSiO₂gel beads. The novel photocatalytic reagents can adsorb organic matters around the semiconductor particles, enhance the local concentration, prevent the intermediates from volatilizing and drifting away, and accelerate the reaction. The supporters depended on the micro-cystic cavity made of surfactant, sodium dodecyl sulfate and sodium silicate, aggregation spherical SiO₂ colloidal particles taking sodium silicate as matrix, prepares TiO₂/SiO₂ catalyst by absorbing anatase TiO₂ on the surface of hydroxide silicon. Characterization of the catalyst by SEM and XRD, and the photocatalytic activity through the degradation rate of humic acid are investigated. The experiments demonstrated that: the molar ratio of sodium silicate to sodium dodecyl sulfate (SDS) is 3/5 and the molar ratio of TiO₂ to SiO₂ is 1/8, the particle size of prepared catalyst is 0.5-30μm, and the TiO₂/SiO₂ catalyst showed ideal performance of adsorption and photocatalytic activity.

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Environmental Biotechnology and Materials Engineering (2013)

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Advanced Materials Research (Volume 777)

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77-81

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.777.77

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Online since:

September 2013

Authors:

You Liang Liu, Chang Chun Cao, Jie Chen

Keywords:

Humic Acid (HA), Photocatalyst, SiO₂Collodal Particles, TiO₂/SiO₂

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