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Highly-dispersed noble metal nanoparticles (Au, Ag, Pd and Pt) supported on silica have been successfully prepared via reaction between modified silica and metal precursors in aqueous solutions, and the modified silica was synthesised through a sol-gel process of tetraethyl orthosilicate and 3-glycidoxypropyltrimethoxysilane (GPTMS) with aqueous ammonia as condensation catalyst. The transmission electron...
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