Synthesis and characterization of nano TiO2-SiO2: PVA composite - a novel route

被引:0
作者
Venckatesh, Rajendran [1 ]
Balachandaran, Kartha [2 ]
Sivaraj, Rajeshwari [3 ]
机构
[1] Govt Arts Coll, Fac Chem, Udumalpet 642126, Tamil Nadu, India
[2] Bharathiar Univ, Res & Dev Ctr, Coimbatore 641046, Tamil Nadu, India
[3] Karpagam Univ, Dept Biotechnol, Coimbatore 641021, Tamil Nadu, India
关键词
polymer nanocomposite; scanning electron microscope; sol-gel; thermogravimetric/differential thermal analysis; X-ray diffraction;
D O I
10.1186/2228-5326-2-15
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A novel, simple, less time consuming and cost-effective sol-gel method has been developed to synthesize nano titania-silica with polyvinyl alcohol (PVA) composite relatively at low temperature in acidic pH. Titania sol is prepared by hydrolysis of titanium tetrachloride and was mixed with silicic acid and tetrahydrofuran mixture. The reaction was carried out under vigorous stirring for 6 h and dried at room temperature with the addition of PVA solution. The resulting powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared (FT-IR), UV-visible spectroscopy and thermal techniques. The grain size of the particles was calculated by X-ray diffraction; surface morphology and chemical composition were determined from scanning electron microscopy-energy dispersive spectroscopy; metal oxide stretching was confirmed from FT-IR spectroscopy; bandgap was calculated using UV-visible spectroscopy, and thermal stability of the prepared composite was determined by thermogravimetric/differential thermal analysis. Since TiO2 got agglomerated on the surface of SiO2, effective absorptive sites increase which in turn increase the photocatalytic efficiency of the resulting composite.
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页数:5
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