Phosphate doping as a promising approach to improve reactivity of Nb 2 O 5 in catalytic activation of hydrogen peroxide and removal of methylene blue via adsorption and oxidative degradation.

Autor: Wolski L; Faculty of Chemistry, Adam Mickiewicz University, Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland. Electronic address: wolski.lukasz@amu.edu.pl., Sobańska K; Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland., Nowaczyk G; NanoBioMedical Centre, Adam Mickiewicz University, Poznań, ul. Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland., Frankowski M; Faculty of Chemistry, Adam Mickiewicz University, Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland., Pietrowski M; Faculty of Chemistry, Adam Mickiewicz University, Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland., Jarek M; NanoBioMedical Centre, Adam Mickiewicz University, Poznań, ul. Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland., Rozmyślak M; Faculty of Chemistry, Adam Mickiewicz University, Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland., Pietrzyk P; Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland. Electronic address: piotr.pietrzyk@uj.edu.pl.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2022 Oct 15; Vol. 440, pp. 129783. Date of Electronic Publication: 2022 Aug 17.
DOI: 10.1016/j.jhazmat.2022.129783
Abstrakt: This study is devoted to the evaluation of the influence of phosphate dopants on the reactivity of Nb 2 O 5 -based nanomaterials in the combined catalytic activation of H 2 O 2 and the elimination of methylene blue (MB) from an aqueous solution via adsorption and chemical degradation. For this purpose, several niobia-based catalysts doped with various amounts of phosphate were prepared by a facile hydrothermal method and subsequent calcination. Phosphate doping was shown to strongly enhance the ability of Nb 2 O 5 to activate H 2 O 2 , as well as to adsorb and degrade MB. The most pronounced differences in the reactivity of the parent Nb 2 O 5 and phosphate-doped samples were observed under strongly acidic conditions (pH ~ 2.4), at which the most active modified catalysts (Nb/P molar ratio = 5/1) was approximately 6 times more efficient in the removal of MB. The observed enhancement of reactivity was attributed to the increased generation of singlet oxygen 1 O 2 , which was identified as the main oxidizing agent responsible for efficient degradation of MB. To our knowledge, it is the first report revealing that phosphate doping of Nb 2 O 5 resulted in an improved activity of niobia in the adsorption and degradation of organic pollutants.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: