Enhanced photocatalytic properties of TiO2/rGO nanocomposites Doped with CdS
Seliverstova E. Serikov T. Sadykova A. Ibrayev N. Nuraje N.
15 January 2025Elsevier B.V.
Materials Letters
2025#379
To increase the photocatalytic activity of nanocomposite based on TiO2 and rGO (NC) and improve its photosensitivity in the visible region of the spectrum, the influence of CdS concentration (1 to 10 wt% with respect to NC) on its physicochemical and photocatalytic properties was studied. The addition of CdS to NC leads to a significant increase in the photocatalytic activity. An almost fivefold increase in photocurrent compared to pure NC was registered for NC/CdS_5%. Data on Methylene blue photodegradation showed that after 210 min of irradiation, only 5 % of dye molecules remained in solution. This value is 14.4 and 11.6 times higher than that of pure NC or CdS, respectively. Enhanced photocatalytic activity is related both to the improvement of NC absorption in the region of 400–800 nm and the decrease of the band gap width of NC upon addition of CdS, as well as the significant change in the electrophysical characteristics of the nanocomposite.
CdS , Concentrations , Graphene oxide , Nanocomposite , Photocatalysis , Structure , TiO2
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Buketov Karaganda University, Karaganda, 100024, Kazakhstan
Department of Chemical & Materials Engineering, School of Engineering & Digital Science, Nazarbayev University, Astana, 010000, Kazakhstan
Renewable Energy Laboratory, National Laboratory Astana, Nazarbayev University, Astana, 010000, Kazakhstan
Buketov Karaganda University
Department of Chemical & Materials Engineering
Renewable Energy Laboratory
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