Photocatalytic Degradation of Rhodamine B Dye through Zinc Oxide Obtained by High Energy Milling

Jeferson Almeida Dias; Vera Lúcia Arantes; Alfeu Saraiva Ramos; Tania Regina Giraldi; Marília Zani Minucci; Sylma Carvalho Maestrelli

doi:10.4028/www.scientific.net/MSF.881.398

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HomeMaterials Science ForumMaterials Science Forum Vol. 881Photocatalytic Degradation of Rhodamine B Dye...

Photocatalytic Degradation of Rhodamine B Dye through Zinc Oxide Obtained by High Energy Milling

Abstract:

The heterogeneous photocatalysis has been developed to treatment of recalcitrant organic effluents such as the dyes. The chemical reactions occur on a semiconductor surface exposed to electromagnetic radiation. The objective of this study was evaluate the high energy milling as a mechanism to obtain fine powders of ZnO to utilization in photocatalysis. Raw ZnO was characterized by X-Ray diffraction, BET, sedigraph and Helium pycnometry and it was milled during four and ten hours in dry and wet media. The milled powders were characterized by X-Ray diffraction and they were evaluated in photocatalytic degradation of Rhodamine B dye. The results showed high purity of the powders before and after milling and the photocatalytic efficiency was function of processing conditions. The average half-life time for the dye varied between of 990.2 and 7.6 min wherein the powder obtained by four hours in dry media milling showed the best results of photodegradation.

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Periodical:

Materials Science Forum (Volume 881)

Pages:

398-403

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.881.398

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Online since:

November 2016

Authors:

Jeferson Almeida Dias, Vera Lúcia Arantes, Alfeu Saraiva Ramos, Tania Regina Giraldi, Marília Zani Minucci, Sylma Carvalho Maestrelli

Keywords:

Advanced Oxidation Processes, Fine Powders, Processing, Semiconductor

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