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

AUTOR(ES)

Stropa, Jusinei M., Herrero, Aline S., Oliveira, Silvio C., Cavalheiro, Alberto A., Dantas, Renato F., Oliveira, Samuel L., Machulek Jr., Amilcar, Oliveira, Lincoln C. S.

FONTE

J. Braz. Chem. Soc.

DATA DE PUBLICAÇÃO

2016-03

RESUMO

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.

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