博士生导师
硕士生导师
教师拼音名称：lidongxiang
电子邮箱：
学历：博士研究生
学位：理学博士
毕业院校：山东大学
通讯/办公地址：
邮编：
邮箱：
移动电话：
最后更新时间：..
>>
>>
关键字：Nanostructures; Gold; Silver; Thermosensitive polymer; Catalyst
摘要：Core-shell AuNR@Ag nanostructures were synthesized and surface-grafted with thermosensitive poly(N-isopropylacrylamide) to enhance stability and endow stimuli-responsive property. The AuNR cores showed average dimensions of 8-nm diameter and 33-nm length, while the anisotropic silver shells displayed 1-2 nm thin side and maximal 8 nm fat side. The obtained polymer-stabilized AuNR@Ag nanostructures as catalysts showed normal Arrhenius change of apparent rate constant, k(app), in catalyzed reaction between 20 and 30 degrees C, but displayed a decrease of k(app) with respect to the temperature increasing between 32.5-40 degrees C, showing self-inhibition of the observed catalytic activity. Such "smart" self-inhibition of catalytic activity at enhanced temperature can be attributed to the thermosensitive response of the grafted polymer molecules and should be significant to control the reaction rate and avoid superheat for exothermic reactions. Such polymer-stabilized nanocatalyst also could be recovered and reused in the catalytic system.
卷号：19
期号：11
是否译文：否
