Au-PCM@Cu_(2)O多功能复合材料的制备及性能研究

The Study of Preparation and Properties of Au-PCM@Cu_(2)O Multifunctional Microcapsules

本文采用葡萄糖还原法制备了以n-Cu_(2)O为芯材,Cu2O为壳材并负载贵金属纳米粒子的相变微胶囊,并分别进行了SEM、XRD、DSC和UV-vis测试。结果显示微胶囊最佳核-壳比为50/50,呈现出八面体结构,平均直径约为7μm,XRD结果表明微胶囊壳层为Cu_(2)O,并且以Cu_(2)O的(111)晶面为主,负载Au纳米粒子对微胶囊的形貌特征和晶体结构均不会造成影响,但改变它的结晶/熔融峰特性,使其热性能略有下降但降低幅度不大,同时Au纳米粒子的负载加速了样品对刚果红染料的催化降解过程,使微胶囊的吸附性能和光催化性能均有提高。

The multifunctional microcapsules with n-Cu_(2)O as the core,Cu_(2)O as the shell and loaded with precious metal nanoparticles were prepared by the glucose reduction method,and the SEM,XRD,DSC and UV-vis tests were carried out respectively.The results show that the best core-shell ratio of the microcapsules is 50/50,showing an octahedral structure with an average diameter of about 7μm.XRD results show that the shell layer of the microcapsules is Cu_(2)O,and the(111)crystal planeof Cu_(2)O is the main component.Au nanoparticles will not affect the morphology and crystal structure of the microcapsules,but change its crystallization/melting peak characteristics,so that its thermal performance is slightly reduced,but the reduction is not large.At the same time,the loading of Au nanoparticles accelerates the catalytic degradation process of Congo red dyeand improves the adsorption performance and photocatalytic performance of the microcapsules.