Synthesis and photocatalytic activity of sepiolite supportednano-TiO2 composites prepared by a mild solid-state sintering process

Supported nano-TiO2photocatalysts play an important role in water environment restoration because of their potential application to photocatalytic degradation of organic contaminants in waste water. With sepiolite as the support, the nano-TiO2 sepiolite composite photocatalysts were synthesized by a...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2016-08, Vol.39 (1)
Main Authors: Liao, L M, Wang, Z Q, Liang, H, Feng, J, Zhang, D
Format: Article
Language:English
Subjects:
Catalytic activity
Composite materials
Contaminants
Environmental restoration
Fluorescence
Fluorescence spectroscopy
Nanoparticles
Organic contaminants
Photocatalysis
Photodegradation
Sepiolite
Sintering
Solid state
Spectroscopy
Spectrum analysis
Titanium dioxide
Wastewater
Wastewater pollution
X-ray diffraction
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Summary:Supported nano-TiO2photocatalysts play an important role in water environment restoration because of their potential application to photocatalytic degradation of organic contaminants in waste water. With sepiolite as the support, the nano-TiO2 sepiolite composite photocatalysts were synthesized by an easily operated and mild solid-state sintering process.The microstructureand photocatalytic property of the sepiolite supportednano-TiO2 composites were characterized and analyzed by X-ray diffraction spectroscopy, UV-Visible spectroscopy and fluorescence spectroscopy. In addition, the influences of calcination temperature and load ratios on the photocatalytic activity of sepiolite supported nano-TiO2 composites were studied.The results indicated that appropriate ratios of sepiolite supports to nano-TiO2contributed to uniform dispersion of nanoparticles, and enhanced the absorption ability within the UV-Vis range, and consequently increased the photocatalytic activity of the composites.Under the preparation conditions of 90 wt. % TiO2 loading and calcinated at 400 °C, a maximum in photocatalytic activity ofnano-TiO2 sepiolite composite was obtained.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/39/1/012068