TiO 2 /Arabic Gum for Degradation of Pollutants in Water

Anderson Lopes, Francisca P. Araújo, Dihego Damasceno, Luzia M. C. Honório, Alan I. S. Morais, Luciano C. Almeida, Ramón Peña Garcia, Edson C. Silva-Filho, Marcelo B. Furtini and Josy A. Osajima ()
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Anderson Lopes: Interdisciplinary Laboratory Advanced Materials (LIMAv), Federal of University of Piauí, Teresina 64049-550, PI, Brazil
Francisca P. Araújo: Interdisciplinary Laboratory Advanced Materials (LIMAv), Federal of University of Piauí, Teresina 64049-550, PI, Brazil
Dihego Damasceno: Interdisciplinary Laboratory Advanced Materials (LIMAv), Federal of University of Piauí, Teresina 64049-550, PI, Brazil
Luzia M. C. Honório: Interdisciplinary Laboratory Advanced Materials (LIMAv), Federal of University of Piauí, Teresina 64049-550, PI, Brazil
Alan I. S. Morais: Interdisciplinary Laboratory Advanced Materials (LIMAv), Federal of University of Piauí, Teresina 64049-550, PI, Brazil
Luciano C. Almeida: Chemical Engineering Department, Federal University of Pernambuco, Recife 52171-900, PE, Brazil
Ramón Peña Garcia: Academic Unit of Cabo de Santo Agostinho, Federal University of Rural Pernambuco, Cabo de Santo Agostinho 50670-901, PE, Brazil
Edson C. Silva-Filho: Interdisciplinary Laboratory Advanced Materials (LIMAv), Federal of University of Piauí, Teresina 64049-550, PI, Brazil
Marcelo B. Furtini: Interdisciplinary Laboratory Advanced Materials (LIMAv), Federal of University of Piauí, Teresina 64049-550, PI, Brazil
Josy A. Osajima: Interdisciplinary Laboratory Advanced Materials (LIMAv), Federal of University of Piauí, Teresina 64049-550, PI, Brazil

Sustainability, 2023, vol. 15, issue 22, 1-17

Abstract: Emerging contaminants and pollution are environmental problems threatening public health. Antibiotic ciprofloxacin and methylene blue dye are pollutants frequently detected in water systems worldwide. Photocatalysis is a process for water treatment. TiO 2 -based catalysts synthesized with natural gums show improved photocatalytic properties. Here, the sol–gel method synthesized TiO 2 /Arabic gum for photocatalytic performance. The innovation of this work was synthesized at 400 °C and investigated their photocatalytic proprieties using methylene blue and ciprofloxacin as model pollutants. XRD showed that the photocatalyst was in the anatase phase. The result showed that TiO 2 with a band gap of 3.29 eV was achieved at a calcination temperature of 400 °C. Corresponding FTIR results suggest only the existence of functional groups related to TiO 2 . The SEM and BET method characterization indicated that TiO 2 /Arabic gum were spherical-shaped nanoparticles arranged in clusters with a mesoporous structure, contributing to photocatalytic performance. In addition, photocatalytic studies showed that the methylene blue dye and ciprofloxacin antibiotic degradation rates reached 99% and 94% under UV light, respectively. The hole (h + ) and O H ⦁ radicals are essential in photodegradation. The synthesized material showed excellent photostability and maintained almost the same degradation percentage in the three consecutive cycles tested on the different pollutants. The TiO 2 /Arabic gum is an excellent candidate for future use in treating contaminants in aqueous media using photocatalysis. Therefore, TiO 2 /Arabic gum nanoparticles are a promising material for wastewater treatment.

Keywords: dye; water treatment; oxide (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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