Novel thermal decomposition approach for the synthesis of TiO2@Ag core-shell nanocomposites and their application for catalytic reduction of 4-nitrophenol
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Metal-semiconductor core-shell nanocomposites with TiO2 as core and Ag nanoparticles as shell (TiO2@Ag) have been synthesized by a novel thermal decomposition approach. The size of Ag nanoparticles in TiO2@Ag can be controlled by varying the amount of silver acetate used during the synthesis. The synthesized TiO2@Ag core-shell nanocomposites were characterized using various state-of-art analytical techniques. XRD analysis confirms the formation of anatase and metallic silver in the core-shell nanocomposites and FT-IR studies prove purity of the TiO2@Ag core-shell nanocomposites. XPS studies confirm the presence of Ti4+ and metallic silver in the nanocomposites, and FESEM and TEM studies prove the coating of Ag nanoparticles on the surface of TiO2 spheres. The TiO2@Ag core-shell nanocomposites were explored as catalyst for the reduction of 4-nitrophenol in an aqueous solution at room temperature. In terms of catalytic performance, the TiO2@Ag core-shell nanocomposites are better compared to pure TiO2 as well as Ag nanoparticles.
KeywordsCore-shell nanocomposites Thermal decomposition 4-Nitrophenol reduction Nanostructured catalysts
Jatin Mahajan thanks the University Grants Commission, Government of India, for the fellowship (JRF/SRF). The authors are thankful to Institute Instrumentation Centre, IIT Roorkee for providing various facilities.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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