Synthesizing tertiary silver/silica/kaolinite nanocomposite using photo-reduction method: Characterization of morphology and electromagnetic properties |
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| Authors: | Mazeyar Parvinzadeh Gashti Arash Almasian |
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| Affiliation: | 1. Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;2. Department of Chemistry, University of Duisburg-Essen, Essen 45117, Germany;1. Instituto de Ciências da Terra (Pólo da Faculdade de Ciências U.P.), Departamento de Geociências, Ambiente e Ordenamento do Território, Faculdade de Ciências, Universidade do Porto, Portugal;2. Indian School of Mines, Department of Environmental Science and Engineering, Dhanbad 826004, Jharkhand, India;3. Departamento de Ciências da Terra, Centro de Geofísica da Universidade de Coimbra, Faculdade de Ciências e Tecnologia da Universidade de Coimbra, Portugal;4. Faculdade de Engenharia, Universidade do Porto, Portugal;5. Instituto Nacional del Carbón (INCAR-CSIC), Francisco Pintado Fe 26, 33011 Oviedo, Spain;6. School of Biological, Earth and Environmental Sciences, University of New South Wales, Australia;1. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi''an 710119, Shaanxi, China;2. Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, 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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