吸附法制备CuO/SiO2纳米复合材料

为了研究和控制CuO粒子的生长，提出了一种利用吸附相纳米反应器制备纳米粒子的新方法.在SiO2表面的吸附层反应器中得到CuO纳米粒子，由络合滴定法测定了Cu离子的吸附速度，利用XRD、TEM、EDX和溶剂置换的方法研究了反应和吸附过程的特性.结果表明，Cu离子的吸附在1 h内达到平衡，60%的Cu离子被吸附到SiO2表面.随着温度的升高，吸附层体积会减小且络合吸附作用得到加强.由于吸附层度的限制，CuO晶粒粒径会减小.反庆在吸附层内发生，随水量的增加，SiO2表面环境发生突变，Cu量迅速达到最大值并不再改变.

Synthesis of CuO/SiO2 nanocomposite material using adsorption method

To research and control the CuO particle growth,a novel preparation method using adsorption phase nanoreactor technique was proposed.CuO nanoparticles were synthesized in a nanoreactor formed by adsorption layer on SiO_2 surface.The adsorption rate of copper ion was measured by complexo-metric titration.The characteristics of reaction and adsorption process were investigated by XRD,TEM,EDX and solvent-substituted.The results indicate that the adsorption of copper ion achieves equilibrium in less than 1 h and more than 60% copper ions are adsorbed on the SiO_2 surface.The adsorption layer volume decreases and the complexation adsorption enhances with the increasing temperature.The grain size of CuO decreases owing to the limit of adsorption layer.The reaction occurs in the adsorption layer,and the copper quantity reaches the maximum rapidly and does not change with increasing water due to a saltation of SiO_2 surface environment.