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Comparison Study of Photocatalytic Properties of SrTiO3 and TiO2 Powders in Decomposition of Methyl Orange
He, H. Y.
Abstract
Nano-SrTiO3 and TiO2 powders were synthesized using sol-gel method. TheSrTiO3 and TiO2 powders were characterized using XRD, SEM, and spectrophotometry. XRD analysis indicated that theTiO2powderwas uniform anatasecrystals of9.9 nm and TheSrTiO3powders was cubic nano-crystal of 16.2nm. Photocatalytic experiments revealed that methyl orange in water can be decomposed on the two powders under sunlight irradiation. Benzyl groups in methyl orange can befast decomposed on TheSrTiO3powders than on TiO2 powders although color peak was decreased in the reverse order. After irradiation of 4h, the decrease of the color peak and character peak of benzylwere respectivelyabout 72% and53% on theTiO2 powder; however,thedecrease ofthecolor peak and character peak of benzyl wererespectively about 93% and 88% on TheSrTiO3.
Keywords
SrTiO3, TiO2, Powder, Photocatalysis, Benzyl degradation, Wastewater treatment
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