Enhancement of photocatalytic degradation of furfural and acetophenone in water media using nano-TiO₂-SiO₂deposited on cementitious materials

Soltan, Sahar, Jafari, Hoda, Afshar, Shahrara and Zabihi, Omid 2016, Enhancement of photocatalytic degradation of furfural and acetophenone in water media using nano-TiO₂-SiO₂deposited on cementitious materials, Water science and technology, vol. 74, no. 7, pp. 1689-1697, doi: 10.2166/wst.2016.343.

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Title Enhancement of photocatalytic degradation of furfural and acetophenone in water media using nano-TiO₂-SiO₂deposited on cementitious materials
Author(s) Soltan, Sahar
Jafari, Hoda
Afshar, Shahrara
Zabihi, OmidORCID iD for Zabihi, Omid orcid.org/0000-0001-8065-2671
Journal name Water science and technology
Volume number 74
Issue number 7
Start page 1689
End page 1697
Total pages 9
Publisher IWA Publishing
Place of publication London, Eng.
Publication date 2016-10
ISSN 0273-1223
1996-9732
Keyword(s) Science & Technology
Technology
Life Sciences & Biomedicine
Physical Sciences
Engineering, Environmental
Environmental Sciences
Water Resources
Engineering
Environmental Sciences & Ecology
concrete
nano-TiO2-SiO2
organic pollutant
photocatalysts
TITANIUM-DIOXIDE
THIN-FILMS
TIO2
TIO2/SIO2
PHOTODEGRADATION
SIZE
Summary In the present study, silicon dioxide (SiO2) nanoparticles were loaded to titanium dioxide (TiO2) nano-particles by sol-gel method to make a high porosity photocatalyst nano-hybrid. These photocatalysts were synthesized using titanium tetrachloride and tetraethyl orthosilicate as titanium and silicon sources, respectively, and characterized by X-ray powder diffraction (XRD) and scanning electron microscope methods. Subsequently, the optimizations of the component and operation conditions were investigated. Then, nano-sized TiO2 and TiO2-SiO2 were supported on concrete bricks by the dip coating process. The photocatalytic activity of nano photocatalysts under UV irradiation was examined by studying the decomposition of aqueous solutions of furfural and acetophenone (10 mg/L) as model of organic pollutants to CO2 and H2O at room temperature. A decrease in the concentration of these pollutants was assayed by using UV-visible absorption, gas chromatography technique, and chemical oxygen demand. The removal of these pollutants from water using the concrete-supported photocatalysts under UV irradiation was performed with a greater efficiency, which does not require an additional separation stage to recover the catalyst. Therefore, it would be applicable to use in industrial wastewater treatment at room temperature and atmospheric pressure within the optimized pH range.
Language eng
DOI 10.2166/wst.2016.343
Indigenous content off
HERDC Research category C1.1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30137956

Document type: Journal Article
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