【作者】：Peng Sun,Xinxin He,Wenbo Wang,Jian Ma,Yanfeng Sun* ,and ,Geyu Lu*
【题目】：Template-free synthesis of monodisperse alpha-Fe2O3 porous ellipsoids and their application to gas sensors
【关键词】：LITHIUM-ION BATTERY,SENSING PROPERTIES,HOLLOW SPHERES,TIO2 NANOSPHERES,INTERIOR SPACE,FABRICATION,GROWTH,SIZE,NANOPARTICLES,NANOCRYSTALS
【版面信息】：CrystEngComm 14 (2012) 2229-2234
摘要:
Monodisperse porous alpha-Fe2O3ellipsoids composed of primary nanocrystals were synthesized by a facile one-step template-free hydrothermal method. Field emission scanning electron microscopic and transmission electron microscopic results revealed that these porous ellipsoids were built from a large number of nanoparticles with sizes of about 10-20 nm. The morphology and size of the as-prepared products could be tailored by simply adjusting the amounts of hexamethylenetetramine and reaction temperature. A possible formation mechanism was proposed on the basis of the results of time-dependent experiments. When used as sensing materials in chemical sensors, the as-prepared porous alpha-Fe2O3ellipsoids exhibit a high response to ethanol.
