TiO2 decorated sand grains for photodegradation of pollutants: Methylene blue and ciprofloxacin study
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Data
2020-01-01
Autores
Lacerda, Jorge A.S.
Macedo, Allan M.
Teixeira, Rodolfo I.
Simões, Grazieli
Ribeiro, Emerson S. [UNESP]
Forero, Josué S.B.
Corrêa, Rodrigo J. [UNESP]
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Resumo
This study shows a preparation and evaluation of a new non-expensive TiO2 based photocatalyst built over sand grains surfaces as an alternative green technology for water treatment. The semiconductor covalently bonded to the silica sand grains (sand@TiO2) prepared by hydrolysis of isopropoxide orthotitane over sand grains, showed a high surface area 296 m2 g-1 and a high reaction rate for methylene blue (MB) photodegradation (0.064 min-1), on steady state condition by using 3 g of sand@TiO2 and an MB solution (20 mL, 3 × 10-5 mol L-1) or ciprofloxacin hydrochloride (CIP) solution (20 mL, 1.9 × 10-3 mol L-1). Under UV irradiation with a medium pressure Hg lamp, the total MB removal reached 70% after 7 min and 45% for CIP in 60 min. Further, the photocatalyst showed to be a promising reusable material for removal of ciprofloxacin hydrochloride antibiotic (CIP) on wastewater. This new material appears as a new promising low cost and low impact reusable catalyst for water treatment.
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Ciprofloxacin, Methylene blue, Photodegradation, Reusable catalyst, TiO2
Como citar
Journal of the Brazilian Chemical Society, v. 31, n. 1, p. 201-210, 2020.