Use of Natural Rubber Membranes as Support for Powder TiO2and Ag/TiO2 Photocatalysts

Journal of the Brazilian Chemical Society

Universidade Federal de Mato Grosso do Sul, Campo Grande, Brazil¹  Oliveira, Lincoln C. S.¹  Oliveira, Samuel L.¹  Universidade Estadual de Mato Grosso do Sul, Naviraí, Brazil¹  Stropa, Jusinei M.¹  Dantas, Renato F.¹  Herrero, Aline S.¹  Cavalheiro, Alberto A.¹  Oliveira, Silvio C.¹  Machulek Jr., Amilcar¹  Universidade de Campinas, Limeira, Brazil¹ 

关键词:  titanium dioxide;    silver;    membrane;    natural rubber;    heterogeneous photocatalysis;   

DOI  :  10.5935/0103-5053.20150293

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The purpose of this study was to synthesize TiO2-polymer composites able to act as photocatalyst membranes. TiO2 catalysts were prepared using the sol-gel method to contain 0.0, 0.5, 1.0, and 2.0 wt.% of embedded Ag particles, subsequently incorporated into natural rubber latex at a weight fraction of 15%. Samples of these ceramic powders were suspended in a latex emulsion (natural rubber), cast in Petri dishes and slowly dried in an oven. The resulting materials were evaluated by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray, diffuse reflectance spectroscopy, differential scanning calorimetry, thermogravimetry, and photocatalytic assaying using methylene blue as an organic pollutant reference. All composite membranes exhibited good photoactivity conferred by TiO2 powder, with 98% dye fading after 300 min of ultraviolet irradiation.

【 授权许可】

Unknown