Uncovering the Role of Surface-Attached Ag Nanoparticles in Photodegradation Improvement of Rhodamine B by ZnO-Ag Nanorods
Em S. Yedigenov M. Khamkhash L. Atabaev S. Molkenova A. Poulopoulos S.G. Atabaev T.S.
August 2022MDPI
Nanomaterials
2022#12Issue 16
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.
Ag nanoparticles , photocatalytic activity , photodegradation , radical scavengers , rhodamine B , ZnO nanorods
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Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Professional Disciplines, Academy of the Ministry of Emergency Situations, Tashkent, 100102, Uzbekistan
Institute of Advanced Organic Materials, Pusan National University, Busan, 46241, South Korea
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Chemistry
Department of Professional Disciplines
Institute of Advanced Organic Materials
Department of Chemical and Materials Engineering
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