Cu2O颗粒的制备及其吸附性能

Preparation and Absorption Properties of Cu2O Particles

通过液相还原法制备了Cu2O颗粒，利用扫描电子显微镜（SEM）以及X射线衍射（XRD）等手段对粒径的大小、微结构以及组分进行了测试和分析。测试结果表明：Cu2O颗粒为组分单一、表面含有大量孔隙的八面体结构。颗粒的粒径大小并不均匀，分布在几十纳米到1微米之间。同时研究了Cu2O颗粒的吸附特性，发现Cu2O颗粒对甲基橙具有良好的吸附能力。在吸附160min后，甲基橙的吸附率为67．5％，而且其最高吸附率可达94．86％。Cu2O颗粒的吸附性能可能主要来源于颗粒上的孔隙结构。拟合结果表明Cu2O颗粒的吸附过程符合伪一级动力学方程，这说明Cu2O颗粒的吸附机制主要是物理吸附。

The Cu2O particles were prepared with the liquid phase reduction method. The size, microstructure and composition of the particles were tested and analyzed by scanning electron mi- croscope （SEM） and X-ray diffraction （XRD）. The test results show that the Cu2O particles are the porous octahedral structure with uniform composition. The particle size is not uniform in the range from a few dozen nanometers to one micrometer. At the same time, the absorption proper- ty of the Cu2O particles was investigated. It is found that the Cu2O particles have a good absorption ca- pacity for the methyl orange. The absorption rate for the methyl orange is 67. 50% after absorption for 160 rain, and the maximum absorption rate can reach 94. 86%. The absorption capacity of the Cu2O particles mainly results from the porous structures of particles. The fitting result shows that the absorption process of the Cu2O particles conforms to the pseudo first-order kinetics equation, indicating the absorption mechanism of the Cu2O particles is mainly physical absorption.