Synthesizing tertiary silver/silica/kaolinite nanocomposite using photo-reduction method: Characterization of morphology and electromagnetic properties |
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| Affiliation: | 1. Rare Earths Development Section, Materials Group, Bhabha Atomic Research Centre, Mumbai 400085, India;2. Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;1. Chemistry & Environment Science College, Inner Mongolia Normal University, 81 Zhaowudalu, Huhhot, Inner Mongolia 010022, China;2. Inner Mongolia Key Laboratory of Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, 81 Zhaowudalu, Huhhot 010022, China;1. Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, School of Resources and Environmental Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, PR China;2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China |
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| Abstract: | Silver was loaded on silica/kaolinite by photo-reduction technique. The present study investigated the effects of the UV irradiation on different characteristics of the particles employing X-ray diffraction (XRD), Fourier-transform infrared spectra (FTIR), UV–vis spectrophotometer (UVS), Brunauer–Emmett–Teller specific surface area method (BETM), zeta potential measurement (ZPM), thermal gravimetric analysis (TGA), scanning electron microscope (SEM), electron dispersive X-ray spectrometer (EDX) and electromagnetic transition instrument (ETI). XRD, FTIR as well as UV absorption methods evidenced that synthesizing procedure was successful under UV irradiation. TGA results demonstrated that the Ag nanoparticles (AgNPs) generated on the silica/kaolinite surface can decrease thermal stability of particles due to proton delocalization of hydroxyl groups and Hofmann–Klemen effect. EDX results showed the presence of chemical elements namely Fe, Al, Si, Mg, K, Ti, Ag, Ca and Fe on the surface of tertiary nanocomposite. The synthesized silver/silica/kaolinite particles were found to have a higher electromagnetic absorption activity compared with silica/kaolinite. As a result, they can be used in polymer-based composites for preparing high performance electromagnetic interference shielding materials. |
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