Journal
SCIENCE BULLETIN
Volume 60, Issue 15, Pages 1348-1354Publisher
ELSEVIER SCIENCE BV
DOI: 10.1007/s11434-015-0852-6
Keywords
Mesoporous material; Indium oxide; Graphene; Nanocomposite; Nanocasting; Gas sensor
Categories
Funding
- National Natural Science Foundation of China [21006116, 51362024]
- Natural Science Foundation of Ningxia [NZ12111, NZ14010]
- Prophase Research Special Project of the National Basic Research Program of China [2012CB723106]
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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 m(2) g(-1), and rGO nanosheets are synthesized from graphite via graphene oxide (GO) as intermediate. 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.
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