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Synthesis and Characterization of the Pd/SiO2 Nanocomposite by the Sol-Gel Method

机译：Sol-Gel法合成Pd / SiO 2 纳米复合材料及其表征

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The silica supported palladium nano particle were synthesized by using the sol-gel method. The possibility of using palladium (II) nitrate dehydrates as Pd precursor and effect of metal precursor concentration on the final Pd nanoparticle size was investigated. A stable silica sol was prepared via hydrolysis of tetraethyl orthosilicate (TEOS) as a metal alchoxide and condensation reaction.Subsequently, Palladium (II) nitrate dehydrates was added to sol to form the Pd/silica sol. After drying and calcination of the sol, the Pd/SiO2 nanocpmposite has been obtained. Crystallographic information and crystalline size of the synthesized Pd/SiO2 were determined by X-ray diffraction (XRD) method. Morphology of the nanoparticles and hydrogen-bonding interaction between silanol groups and amine ligands were characterized by SEM and Fourier transform infrared (FTIR) spectra, respectively. Finally, the distribution and size of the palladium nanoparticles in the silica was evaluated.
机译：通过溶胶-凝胶法合成了二氧化硅负载的钯纳米粒子。研究了使用硝酸钯（II）脱水物作为Pd前体的可能性以及金属前体浓度对最终Pd纳米颗粒尺寸的影响。通过将原硅酸四乙酯（TEOS）水解为金属醇盐并进行缩合反应制得稳定的硅溶胶，然后将硝酸钯（II）脱水物添加到溶胶中以形成Pd /硅溶胶。溶胶干燥，煅烧后，得到Pd / SiO 2 纳米复合材料。用X射线衍射（XRD）法测定了合成的Pd / SiO 2 的晶体学信息和晶体尺寸。分别通过SEM和傅立叶变换红外光谱（FTIR）表征了纳米颗粒的形貌以及硅烷醇基团与胺配体之间的氢键相互作用。最后，评估了二氧化硅中钯纳米粒子的分布和大小。

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