Synthesis of SiO2@TiO2nanocomposite used to treat organic dye in wastewater
Abstract
Semiconductor materials have been shown to have good photocatalytic activity and can be utilized for the photodegradation of organic pollutants. In the present study, SiO2 nanoparticles were synthesized from rice husks, approximately 23 nm in size, with SEM images showing that the material surface is relatively homogeneous. The photocatalyst of SiO2@TiO2 nanocomposite has beensuccessfully synthesized by coating of TiO2 nanoparticles onto the surface of SiO2. The SiO2@TiO2 nanoparticles with diameters of 40 nm were formed to investigate organic pollutant decomposition. The decomposition of methylene blue from waste water with H2O2 as oxidizing agent under UV light conditions demonstrates strong catalytic activity for the oxidation of organic compounds into more biodegradable compounds.
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