Synthesis, characterization, and photocatalytic performance of nanostructured ZnO films under UV light
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2024
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BRAZIL MRS MEETING, 22nd
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The limited natural water resources have been contaminated by effluents originating from
both the industrial and domestic sectors. A large portion of the available water is consumed
in chemical processes in various industrial sectors, including textiles, paper, and leather.
Also, the inappropriate disposal of pharmaceuticals and dyes on a large scale results in
effluent contamination. Methyl orange is one of the most widely used azo dyes on a large
scale. Photocatalysis is a promising green alternative for the removal of organic dyes in
wastewater. This research aimed to synthe and characterize nanostructured zinc oxide films
to obtain a UV-light-activated photocatalyst capable of degrading organic compounds. The
films were obtained using the sol-gel method. Zinc acetate, MEA, and ethanol were kept
under constant stirring for 60 minutes at 70°C. The solution obtained was sprayed onto
cleaned borosilicate glass substrates by using an airbrush. The samples were then heat
treated at temperatures of 450 and 500°C for 45 minutes. The characterization of the films
was performed using X-ray diffraction (XRD), field-emission scanning electron microscopy
(FE-SEM), UV-Vis spectrophotometry and wettability. The efficiency of the films was
determined by the degradation of a 5 mg.L-1 methyl orange dye water solution at neutral pH,
at constant temperature of 20°C, and under two sources of ultraviolet radiation (λ=352 nm)
for 300 minutes. The films exhibited hydrophilic characteristics and superficial morphology
consisting of spherical nanoparticles. The films showed photoactivity when exposed to UVA
radiation, with the best performance in removing methyl orange dye being 48.6% for the
film treated at 500°C. This removal value can be attributed to the improvement in the
homogeneity of the morphology and thickness of the film treated at 500°C.
Como referenciar
COTINHO, SAMUEL P.; BENTO, RODRIGO T.; SANTOS, THIAGO F. dos; OLIVEIRA, LEANDRO da S.; SANTOS, CAMILA M.G.; SANTOS, DAVI R. dos; CORREA, OLANDIR V.; PILLIS, MARINA F. Synthesis, characterization, and photocatalytic performance of nanostructured ZnO films under UV light. In: BRAZIL MRS MEETING, 22nd, September 29 - October 3, 2024, Santos, SP. Abstract... São Carlos, SP: Aptor Software, 2024. p. 1181-1181. Disponível em: https://repositorio.ipen.br/handle/123456789/48938. Acesso em: 12 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.