Uncovering the Role of Surface-Attached Ag Nanoparticles in Photodegradation Improvement of Rhodamine B by ZnO-Ag Nanorods

Svetlana Em; Mussa Yedigenov; Laura Khamkhash; Shanazar Atabaev; Anara Molkenova; Stavros G. Poulopoulos; Timur Sh Atabaev

doi:10.3390/nano12162882

Uncovering the Role of Surface-Attached Ag Nanoparticles in Photodegradation Improvement of Rhodamine B by ZnO-Ag Nanorods

Svetlana Em, Mussa Yedigenov, Laura Khamkhash, Shanazar Atabaev, Anara Molkenova, Stavros G. Poulopoulos, Timur Sh Atabaev

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

ZnO nanorods decorated with metal nanoparticles have sparked considerable interest in recent years thanks to their suitability for a wide range of applications, such as photocatalysis, photovoltaics, antibacterial activity, and sensing devices. In this study, we prepared and investigated the improved solar-light-assisted photocatalytic activity of ZnO nanorods (NRs) decorated with Ag nanoparticles (NPs) using a conventional rhodamine B (RB) dye as a model water pollutant. We showed that the presence of Ag NPs on the surface of ZnO NRs significantly increases the degradation rate of RB dye (~0.2432 min⁻¹) when compared to bare ZnO NRs (~0.0431 min⁻¹). The improved photocatalytic activity of ZnO-Ag was further experimentally tested using radical scavengers. The obtained results reveal that ˙OH and ˙O₂⁻ radicals are main active species involved in the RB dye photodegradation by ZnO-Ag NRs. It was concluded that efficient charge separation plays a major role in photocatalytic activity improvement.

Original language	English
Article number	2882
Journal	Nanomaterials
Volume	12
DOIs	https://doi.org/10.3390/nano12162882
Publication status	Published - Aug 2022

Keywords

Ag nanoparticles
photocatalytic activity
photodegradation
radical scavengers
rhodamine B
ZnO nanorods

ASJC Scopus subject areas

General Chemical Engineering
General Materials Science

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10.3390/nano12162882

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title = "Uncovering the Role of Surface-Attached Ag Nanoparticles in Photodegradation Improvement of Rhodamine B by ZnO-Ag Nanorods",

abstract = "ZnO nanorods decorated with metal nanoparticles have sparked considerable interest in recent years thanks to their suitability for a wide range of applications, such as photocatalysis, photovoltaics, antibacterial activity, and sensing devices. In this study, we prepared and investigated the improved solar-light-assisted photocatalytic activity of ZnO nanorods (NRs) decorated with Ag nanoparticles (NPs) using a conventional rhodamine B (RB) dye as a model water pollutant. We showed that the presence of Ag NPs on the surface of ZnO NRs significantly increases the degradation rate of RB dye (~0.2432 min−1) when compared to bare ZnO NRs (~0.0431 min−1). The improved photocatalytic activity of ZnO-Ag was further experimentally tested using radical scavengers. The obtained results reveal that ˙OH and ˙O2− radicals are main active species involved in the RB dye photodegradation by ZnO-Ag NRs. It was concluded that efficient charge separation plays a major role in photocatalytic activity improvement.",

keywords = "Ag nanoparticles, photocatalytic activity, photodegradation, radical scavengers, rhodamine B, ZnO nanorods",

author = "Svetlana Em and Mussa Yedigenov and Laura Khamkhash and Shanazar Atabaev and Anara Molkenova and Poulopoulos, {Stavros G.} and Atabaev, {Timur Sh}",

note = "Funding Information: Svetlana Em would like to acknowledge the support of NPO Young Researchers Alliance and Nazarbayev University Corporate Fund {\textquoteleft}{\textquoteleft}Social Development Fund{\textquoteright}{\textquoteright}, Republic of Kazakhstan for grant under Fostering Research and Innovation Potential Program. Funding Information: This research was funded by Nazarbayev University FDCRDG, Grant No. 240919FD3929. Publisher Copyright: {\textcopyright} 2022 by the authors.",

year = "2022",

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doi = "10.3390/nano12162882",

language = "English",

volume = "12",

journal = "Nanomaterials",

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AU - Em, Svetlana

AU - Yedigenov, Mussa

AU - Khamkhash, Laura

AU - Atabaev, Shanazar

AU - Molkenova, Anara

AU - Poulopoulos, Stavros G.

AU - Atabaev, Timur Sh

N1 - Funding Information: Svetlana Em would like to acknowledge the support of NPO Young Researchers Alliance and Nazarbayev University Corporate Fund ‘‘Social Development Fund’’, Republic of Kazakhstan for grant under Fostering Research and Innovation Potential Program. Funding Information: This research was funded by Nazarbayev University FDCRDG, Grant No. 240919FD3929. Publisher Copyright: © 2022 by the authors.

PY - 2022/8

Y1 - 2022/8

N2 - ZnO nanorods decorated with metal nanoparticles have sparked considerable interest in recent years thanks to their suitability for a wide range of applications, such as photocatalysis, photovoltaics, antibacterial activity, and sensing devices. In this study, we prepared and investigated the improved solar-light-assisted photocatalytic activity of ZnO nanorods (NRs) decorated with Ag nanoparticles (NPs) using a conventional rhodamine B (RB) dye as a model water pollutant. We showed that the presence of Ag NPs on the surface of ZnO NRs significantly increases the degradation rate of RB dye (~0.2432 min−1) when compared to bare ZnO NRs (~0.0431 min−1). The improved photocatalytic activity of ZnO-Ag was further experimentally tested using radical scavengers. The obtained results reveal that ˙OH and ˙O2− radicals are main active species involved in the RB dye photodegradation by ZnO-Ag NRs. It was concluded that efficient charge separation plays a major role in photocatalytic activity improvement.

AB - ZnO nanorods decorated with metal nanoparticles have sparked considerable interest in recent years thanks to their suitability for a wide range of applications, such as photocatalysis, photovoltaics, antibacterial activity, and sensing devices. In this study, we prepared and investigated the improved solar-light-assisted photocatalytic activity of ZnO nanorods (NRs) decorated with Ag nanoparticles (NPs) using a conventional rhodamine B (RB) dye as a model water pollutant. We showed that the presence of Ag NPs on the surface of ZnO NRs significantly increases the degradation rate of RB dye (~0.2432 min−1) when compared to bare ZnO NRs (~0.0431 min−1). The improved photocatalytic activity of ZnO-Ag was further experimentally tested using radical scavengers. The obtained results reveal that ˙OH and ˙O2− radicals are main active species involved in the RB dye photodegradation by ZnO-Ag NRs. It was concluded that efficient charge separation plays a major role in photocatalytic activity improvement.

KW - Ag nanoparticles

KW - photocatalytic activity

KW - photodegradation

KW - radical scavengers

KW - rhodamine B

KW - ZnO nanorods

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Uncovering the Role of Surface-Attached Ag Nanoparticles in Photodegradation Improvement of Rhodamine B by ZnO-Ag Nanorods

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