Plasmonic effect of metal nanoparticles on the photocatalytic properties of TiO2/rGO composite

Evgeniya Seliverstova; Timur Serikov; Nurxat Nuraje; Niyazbek Ibrayev; Aigul Sadykova; Magzhan Amze

doi:10.1088/1361-6528/ad3e02

Plasmonic effect of metal nanoparticles on the photocatalytic properties of TiO₂/rGO composite

Nanotechnology. 2024 Apr 12. doi: 10.1088/1361-6528/ad3e02. Online ahead of print.

Authors

Evgeniya Seliverstova¹, Timur Serikov², Nurxat Nuraje³, Niyazbek Ibrayev⁴, Aigul Sadykova², Magzhan Amze³

Affiliations

¹ Buketov University, Universitetskaya str. 28, Karaganda 100024, Kazakhstan, Karaganda, Karagandy Province, 100024, KAZAKHSTAN.
² Physics and Technology Faculty, E A Buketov Karaganda State University, Universitetskaya street house 28, Karaganda, 100028, KAZAKHSTAN.
³ Chemical and Materials Engineering, Nazarbayev University School of Engineering and Digital Sciences, 53 kabanbaybatyr avenue, Astana, 010000, KAZAKHSTAN.
⁴ Buketov Karaganda State University, Institute of Molecular Nanophotonics, Karaganda, 100024, KAZAKHSTAN.

PMID: 38608318
DOI: 10.1088/1361-6528/ad3e02

Abstract

In this work, the plasmonic effect of Au and Ag nanoparticles in the heterostructure photocatalyst system (TiO2/rGO) was studied. The laser ablation approach was applied to synthesize Au and Ag nanoparticles to eliminate impurity influence in this plasmonic study. Characterizing tools such as SEM, TEM, XRD, Raman, UV-vis spectral techniques were applied to obtain morphological information and optical properties of the nanocomposites. Photocatalytic properties of ternary nanocomposities such as, TiO2/rGO/Ag and TiO2/rGO/Au, were evaluated against Methylene blue and Congo red dyes with changing concentration of plasmonic nanoparticles (Au and Ag) and it was founded that the nanocomposite with the concentration of 10-11 mol/L Au NPs in TiO2/rGO has the best photocatalytic activity. EIS study indicated that a significant decrease in resistance Rp (109 Ohms) was observed for TiO2/rGO at 10-11 mol/Lconcentration of Au and its lifetimes is 0.0118 s, supporting that TiO2/rGO/Au has the best photocatalytic activity at 10-11 mol/L Au in the TiO2/rGO nanocomposites.

Keywords: Ag nanoparticles; Au nanoparticles; laser ablation; nanoplasmonics; photocatalytic activity; titanium dioxide and reduced graphene oxide nanocomposite.