In-Situ Formation of AgCl Nanocrystallites in Films Prepared by the Sol-Gel and Silver Nanoparticles in Silica Glass Films |
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Authors: | Zayat M Einot D Reisfeld R |
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Institution: | (1) Department of Inorganic and Analytical Chemistry, Hebrew University of Jerusalem, Jerusalem, 91904, Israel |
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Abstract: | We are reporting on a novel preparation of silver chloride in sol-gel silica films as a precursor for nanoparticles of silver. The precipitation of silver chloride particles in-situ was achieved by the reaction of silver nitrate with trichloroacetic acid. The reaction leads to a slow release of chloride leading to a controlled precipitation of AgCl. The existence of an isotropic crystalline AgCl phase in the glass films was demonstrated by X-rays Diffraction Analysis (XRD) and Scanning Electron Microscope and Energy Dispersive Analysis of X-rays (SEM-EDAX). The resulting films are of good optical quality and exhibit a strong coloration upon irradiation with sunlight or heating to 600°C, due to the reduction of AgCl to silver nanoparticles. The absorption spectra of the films before and after irradiation are shown. |
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Keywords: | sol gel silver chloride silver nanoparticles trichloroacetic acid XRD of silver chloride and silver |
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