期刊
MATERIA-RIO DE JANEIRO
卷 27, 期 1, 页码 -出版社
UNIV FED RIO DE JANEIRO, LAB HIDROGENIO
DOI: 10.1590/S1517-707620220001.1360
关键词
Magnesium doped titania; Sol-gel method; photocatalytic activity
Magnesium doped titania (MDT) composites with varying magnesium weight percentages were synthesized using a simple and economical sol-gel method. The composites exhibited excellent photocatalytic activity for dye degradation.
Magnesium doped titania (MDT) composites with varying magnesium weight percentages (1-5 wt. %) were synthesized through a very simple and economical route of sol-gel method. The reactants used for making alkoxide precursor were titanium tetrachloride whereas magnesium nitrate was used for doping magnesium into titania in a mixture of solvents i.e. ethyl alcohol and water. The optimum conditions maintained for preparing sol were pH 3 and 60 degrees C temperature with constant stirring for 2 hours. The gel obtained after drying the sol for each sample was calcined at 500 degrees C for two hours. The powdered composite samples thus prepared were characterized by X-ray diffraction analysis (XRD), differential scanning calorimetry - thermogravimetric analysis (DSC-TGA), infrared spectroscopy (IR), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The samples were evaluated for their photocatalytic activity against methyl red dye under UV light irradiation and the dye degradation was examined by UV-Vis spectrophotometer. The results confirmed the excellent photocatalytic activity of synthesized magnesium doped TiO2 for the degradation of methyl red dye where MDT-3 having 3% magnesium doping exhibited the maximum degradation i.e. 96.8%.
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