Green and reusable Ag/AgCl-TiO2 nanocomposites for visible light-triggered dye degradation

[Display omitted] •Ag/AgCl-TiO2 nanocomposites are synthesized in a green, single-step process.•Satureja khuzistanica extract acts as a reducing agent and nanocomposite stabilizer.•More than 99% methyl orange is degraded under visible light irradiation.•High-efficiency TiO2-based photocatalysts deve...

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Bibliographic Details
Published in:	Advanced powder technology : the international journal of the Society of Powder Technology, Japan Vol. 33; no. 11; p. 103808
Main Authors:	Maneshi, Mohammadreza, Cerruti, Pierfrancesco, Moeini, Arash, Davoodi, Mansooreh
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-11-2022
Subjects:	Ag/AgCl-TiO2 nanocomposites Green synthesis Photocatalysis Surface plasmonic vibration Water purification Ag/AgCl-TiO2 nanocomposites Green synthesis Water purification Surface plasmonic vibration Photocatalysis
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Summary:	[Display omitted] •Ag/AgCl-TiO2 nanocomposites are synthesized in a green, single-step process.•Satureja khuzistanica extract acts as a reducing agent and nanocomposite stabilizer.•More than 99% methyl orange is degraded under visible light irradiation.•High-efficiency TiO2-based photocatalysts developed for engineering and environmental applications. Ag/AgCl-TiO2 plasmonic nanocomposites (NCs) are endowed with excellent visible-light photocatalytic activity. However, only a few studies investigated environmentally friendly approaches to their synthesis. In this work, Ag/AgCl-TiO2 NCs at five different compositions were prepared in a single-step process by a green and cost-effective route, using Satureja khuzistanica Jamzad aqueous extract. The role of the aqueous plant extract as a reducing and stabilizing agent, and the formation of the NCs were evidenced by several techniques, including FT-IR, EDS, SEM, HRTEM, elemental mapping, and XRD. The morphological analysis demonstrated that the NCs formed nanoaggregates with an average size of 30 nm. The synthesized Ag/AgCl-TiO2 NCs displayed a remarkable photoactivity in the visible light region, as confirmed by the significantly higher degradation rates of methyl orange (MO) compared to TiO2. In particular, the 15% Ag/TiO2 molar ratio sample revealed a MO degradation efficiency higher than 99% under visible light, and retained high photocatalytic activity even after several degradations runs. Overall, the green, cost-effective, and scalable synthesis of Ag/AgCl-TiO2 NCs herein reported provides a novel, more sustainable strategy for the high-efficiency modification of TiO2 photocatalyst in engineering and other environmental applications.
ISSN:	0921-8831 1568-5527
DOI:	10.1016/j.apt.2022.103808