PS@Au核壳结构纳米催化剂的制备及性能研究

Preparation of PS@Au Nano-catalyst and Its Catalytic Performance

采用化学镀工艺,制备了催化性能优良的PS@Au纳米催化剂,负载于表面的Au颗粒粒径约为16nm,结构致密,单分散程度较高。利用扫描电子显微镜(SEM)和紫外-可见分光光度计(UV-Vis),结合催化性能测试,研究了原料加入次序对PS@Au纳米核壳结构催化性能的影响。结果表明:PS@Au纳米核壳结构较大的比表面积是其显著提高亚甲基蓝发色团的降解率以及具有较高催化效果的根本原因,较高的纳米Au负载率和颗粒粗糙度有助于其催化性能的提高。

PS@Au nano-catalyst with excellent catalytic performance was prepared by electroless plat- ing technology, and the diameters of Au nanoparticles were around 16 nm with a narrow distribution. The influence of adding order for raw materials on the catalytic performance was investigated by SEM, UV-Vis spectrometer, and the detection of catalytic performance. It was found that larger surface area was responsible for the improvement of degradation rate of MB chromophore and the excellent catalyt- ic performance of PS@Au nano-catalyst. An increase in the loading and surface roughness of Au nano- particles could help to promote the catalytic performance of the PS@Au nano-catalyst.