Synthesis and characterizations of spherical hollow composed of AgI nanoparticle using AgBr as the precursor |
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Authors: | Ming Yang Kui Zhou |
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Institution: | School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, ChangQing Garden, Hankou, Wuhan 430023, PR China |
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Abstract: | Hollow spheres of AgI with an average radius of 100-200 nm have been prepared by a simple reaction between AgBr suspension and KI in the presence of gelatin. Gelatin played a decisive role as an inhibitor of the direct attack of I− ions to AgBr surfaces and coagulation of the growing AgI in producing the spherical AgI particles. The products were characterized by X-ray powder diffraction, transmission electron microscopy, UV-vis absorption spectroscopy and X-ray photoelectron spectra techniques. The band gaps are estimated to be 2.95 eV according to the results of optical measurements of the hollow spheres of AgI. |
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Keywords: | Silver iodide Hollow spheres Semiconductor |
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