Synthesis and Characterization of a Sol-Gel Derived Ureasilicate Hybrid Organic-Inorganic Matrix Containing CdS Colloidal Particles

摘要

A hybrid organic-inorganic material filled with in situ generated inorganic particles has been synthesised by the homogeneous precipitation of CdS from aqueous solutions of Cd(NO_3)_2 and CH_3CSNH_2.These highly transparent,homogeneous and flexible CdS doped xerogels were prepared by the sol-gel technique using,as precursors,organically modified silicon alkoxide (3-isocyanatepropyltriethoxysilane) and a di-amine functionalized oligopolyoxyethylene (Jeffamine ED-600),which by subsequent hydrolysis and condensation processes formed a solid 3-D network.TEM studies indicate the presence of round nanoparticles around 20 nm in diameter dispersed in a homogeneous amorphous matrix.The samples were also characterized by spectroscopic (UV-visible and photoluminescence) and XRD techniques.