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CdS, TiO_2 and Pd~o nanoparticles growing in the interlamellar space of montmorillonite in binary liquids

机译:蒙脱石层间空间中二元液体中生长的CdS,TiO_2和Pd〜o纳米粒子

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摘要

The interfacial layers on the clay mineral/liquid interface usually range from 0.5 to 5 nm. When clay mineral particles are dispersed in binary textures (ethanol--cyclohexane and ethanol- toluene), an adsorption layer evolves on their surface which may function as a nanophase reactor for the synthesis of nanocrystalline materials. In the adsorption layer on the surface of montmoril- lonite CdS, TiO_2 and metallic palladium nanoparticles with a diameter of 5--l5 nm were grown. The appearance of semiconductor particles and the dependence of particle size upon the Cd~2+ precursor concentration were followed by determination of the band gap energy. The rheological characteristics of suspensions containing nanopaticles are basically different from those of the original suspension. Solid powder samples obtained from the suspensions were studied by small-angle X-ray scattering (SAXS) measurements; the size of nanoparticles located on the clay mineral surfaces was determined and changes in the structure of the support were monitored.
机译:粘土矿物/液体界面上的界面层通常为0.5至5 nm。当粘土矿物颗粒分散在二元结构(乙醇-环己烷和乙醇-甲苯)中时,其表面会形成吸附层,该吸附层可作为纳米相反应器,用于合成纳米晶体材料。在蒙脱石CdS表面的吸附层中,生长了TiO_2和直径为5-15 nm的金属钯纳米粒子。确定带隙能量之后,观察半导体颗粒的出现以及颗粒尺寸对Cd〜2 +前驱物浓度的依赖性。含有纳米颗粒的悬浮液的流变特性与原始悬浮液的流变特性基本不同。通过小角度X射线散射(SAXS)测量研究了从悬浮液获得的固体粉末样品;确定位于粘土矿物表面上的纳米颗粒的尺寸,并监测载体结构的变化。

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