| Synthesis of superparamagnetic and whole visible light-photocatalytic Ni0.5Zn0.5Fe2O4-core/Ag2O-capped TiO2-shell nanospheres |
| Chockalingam Karunakaran, I. Jeba Singh, Pazhamalai Vinayagamoorthy |
| Department of Chemistry, Annamalai University, Annamalainagar 608002, India |
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Received: June 20, 2022; Revised: October 5, 2022 Accepted: November 14, 2022. Published online: November 24, 2022. |
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| ABSTRACT |
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Cubic Ag2O-deposited anatase TiO2 nanospheres with cubic Ni0.5Zn0.5Fe2O4-core have been obtained by a 2-stage synthesis. They have been characterized by energy-dispersive X-ray spectroscopy, high-resolution scanning and transmission electron microscopies, X-ray and selected area electron diffractometries, vibrating sample magnetometry, nitrogen adsorption and desorption, and UV–visible diffuse reflectance and photoluminescence spectroscopies. The synthesized samples are superparamagnetic and absorb UV-A light and visible light in the entire wavelength range. Structure directing agent polyvinylpyrrolidone provides little influence on the Ag2O-capping process. The synthesized Ni0.5Zn0.5Fe2O4-core/Ag2 O-capped TiO2 -shell nanospheres are whole visible light-active magnetically recoverable photocatalyst; capped Ag2O sensitizes anatase TiO2 under whole visible light and the ferrite core buried in TiO2 lattice enables magnetic recovery of the photocatalytic nanospheres. |
| Key words:
Core/shell · Semiconductor · Superparamagnetism · Photosensitization |
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