Controlling synthesis and gas-sensing properties of ordered mesoporous In2O3-reduced graphene oxide(r GO) nanocomposite  

作　　者：Ping Xue Xiaomei Yang Xiaoyong Lai Weitao Xia Peng Li Junzhuo Fang 

机构地区：[1]Key Laboratory of Energy Resource and Chemical Engineering,State Key Laboratory Cultivation Base of Natural Gas Conversion, School of Chemistry and Chemical Engineering,Ningxia University

出　　处：《Science Bulletin》2015年第15期1348-1354,共7页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(21006116,51362024);the Natural Science Foundation of Ningxia(NZ12111,NZ14010);the Prophase Research Special Project of the National Basic Research Program of China(2012CB723106)

摘　　要：Herein, we describe a strategy for fabricating ordered mesoporous In2O3-reduced graphene oxide(r GO)nanocomposite through ultrasonic mixing, where ordered mesoporous In2O3 nanoparticles are synthesized via the nanocasting route by using mesoporous silica as a hard template, which possess ordered mesostructure with a large surface area of 81 m2g-1, and r GO nanosheets are synthesized from graphite via graphene oxide(GO) as intermediate. After coupled with r GO, mesoporous In2O3 could maintain its ordered mesostructure. We subsequently investigate the gas-sensing properties of all the In2O3 specimens with or without r GO for different gases. The results exhibit the ordered mesoporous In2O3-r GO nanocomposite possesses significantly enhanced response to ethanol even at low concentration levels, superior over pure mesoporous In2O3 nanoparticles. Similar strategy could be extended to other ordered mesoporous metal oxide–r GO nanocomposite for improving the gas-sensing property.Herein, we describe a strategy for fabricating ordered mesoporous In2O3-reduced graphene oxide （rGO） nanocomposite through ultrasonic mixing, where ordered mesoporous In2O3 nanoparticles are synthesized via the nanocasting route by using mesoporous silica as a hard template, which possess ordered mesostructure with a large surface area of 81 m2 g-1, and rGO nanosheets are syn- thesized from graphite via graphene oxide （GO） as inter- mediate. After coupled with rGO, mesoporous In2O3 could maintain its ordered mesostructure. We subsequently investigate the gas-sensing properties of all the In2O3 specimens with or without rGO for different gases. The results exhibit the ordered mesoporous In2O3-rGO nanocomposite possesses significantly enhanced response to ethanol even at low concentration levels, superior over pure mesoporous In2O3 nanoparticles. Similar strategy could be extended to other ordered mesoporous metal oxide-rGO nanocomposite for improving the gas-sensing property.

关 键 词：Mesoporous material Indium oxideGraphene NANOCOMPOSITE NANOCASTING Gas sensor 

分 类 号：TQ127.11[化学工程—无机化工] TB33[一般工业技术—材料科学与工程]