Investigation of Ag nanoparticles loading temperature responsive hybrid microgels and their temperature controlled catalytic activity
作者：劉云蕓，劉曉云，查劉生等
關鍵字：Silver nanoparticles，hybrid microgel, silver nanoparticle, catalytic activity
論文來源：期刊
具體來源：Colloids and Surfaces A: Physicochem. Eng. Aspects 393 (2012) 105– 110
發表時間：2012年
Silver (Ag) nanoparticles loading temperature responsive hybrid microgels were readily prepared by
in situ reduction of Ag+ ions coordinated into poly(N-isopropylacrylamide) microgels. The weight percentage
content of the entrapped Ag nanoparticles measured by thermogravity analysis tops 25%, and
their average particle sizes determined by transmission electron microscopy are within the range from 8
to 11 nm. The results obtained by X-ray diffraction exhibit that the Ag nanoparticles are of face-centered
cubic single crystal structure. The particle sizes of the hybrid microgels decrease sharply with environmental
temperature increasing from 30 to 35 ?C, and their surface plasmon resonance absorption
wavelengths are pronouncedly red-shifted within the same temperature range. The catalytic reactivity
of the Ag nanoparticles loading hybrid microgels can be tunable with four stages of change versus
temperature from 20 to 45 ?C.