Electroless Ag nanoparticle deposition on TiO 2 nanorod arrays, enhancing photocatalytic and antibacterial properties.

Autor: Korcoban D; School of Science, College of STEM, RMIT University, Melbourne, Victoria 3001, Australia., Huang LZY; School of Science, College of STEM, RMIT University, Melbourne, Victoria 3001, Australia., Elbourne A; School of Science, College of STEM, RMIT University, Melbourne, Victoria 3001, Australia., Li Q; School of Science, College of STEM, RMIT University, Melbourne, Victoria 3001, Australia., Wen X; School of Science, College of STEM, RMIT University, Melbourne, Victoria 3001, Australia., Chen D; School of Science, College of STEM, RMIT University, Melbourne, Victoria 3001, Australia., Caruso RA; School of Science, College of STEM, RMIT University, Melbourne, Victoria 3001, Australia. Electronic address: rachel.caruso@rmit.edu.au.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2025 Feb 15; Vol. 680 (Pt B), pp. 146-156. Date of Electronic Publication: 2024 Nov 13.
DOI: 10.1016/j.jcis.2024.11.079
Abstrakt: Hypothesis: The small size of the nanoparticles used to obtain high surface area photocatalysts makes their removal from solution difficult. Producing photocatalysts on substrates would alleviate this limitation. Adding heterojunctions to photocatalysts, for example, TiO 2 /Ag, could improve photocatalytic performance due to Schottky junction formation and introduce antibacterial properties.
Experiments: TiO 2 nanorod arrays were synthesised on a substrate via a hydrothermal approach, on which Ag nanoparticles were deposited using an electroless plating technique with varied deposition times and metal precursor concentrations. Photocatalytic performance was evaluated by monitoring Rhodamine B (RhB) degradation under ultraviolet light and antibacterial properties of the films tested using Methicillin-resistant Staphylococcus aureus.
Findings: The Ag nanoparticle content was controlled by the Ag deposition process. The TiO 2 /Ag nanorod array containing 6.6 atomic% Ag as nanoparticles of ∼ 25 nm in diameter degraded 88 % of the RhB in 6 h compared to 54 % degradation for bare TiO 2 nanorods under the same reaction conditions. Decreased photoluminescence with heterojunction formation would indicate electron transfer from the TiO 2 into the Ag nanoparticles, thereby reducing charge carrier recombination. The antibacterial test conducted in the dark revealed enhanced performance for the TiO 2 /Ag sample compared to TiO 2 nanorods against Methicillin-resistant Staphylococcus aureus after 16 h exposure with a death rate of 84 %.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Rachel Caruso reports financial support was provided by Australian Research Council. Aaron Elbourne reports financial support was provided by Australian Research Council. Louisa Huang reports financial support was provided by AINSE Ltd. If there are other authors, they 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 © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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