title: Reduced Graphene Oxide-Based Ordered Macroporous Films on a Curved Surface: General Fabrication and Application in Gas Sensors.
abstract: A new general method for the fabrication of a reduced graphene oxide (rGO)-based ordered monolayer macroporous film composed of a layer of closely arranged pores is introduced. Assisted by the polystyrene microsphere monolayer colloid crystal by a simple solution-heated method, pure rGO, rGO-SnO2, rGO-Fe2O3, and rGO-NiO composite monolayer ordered porous films were examplarily constructed on the curved surface of a ceramic tube widely used in gas sensors. The rGO-oxide composite porous films could exhibit much better sensing performances than those of the corresponding pure oxide films and the composite films without the ordered porous structures in detecting ethanol gas. The enhancement mechanisms induced by distinctive rGO-oxide heterojunctions and porous structures as well as the effects of the rGO content and the pore-size on the sensitivity of the composite films were systematically analyzed and discussed. This study opens up a kind of construction method for an rGO-based composite film gas sensor with uniform surface structures and high performance.
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.
authors.forename: Shipu
authors.initials: S
authors.lastname: Xu
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.|Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University , Guangzhou 510006, P. R. China.|Guangzhou Key Laboratory of Materials for Energy Conversion and Storage , Guangzhou 510006, P. R. China.
authors.forename: Fengqiang
authors.initials: F
authors.lastname: Sun
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.
authors.forename: Zizhao
authors.initials: Z
authors.lastname: Pan
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.
authors.forename: Chaowei
authors.initials: C
authors.lastname: Huang
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.
authors.forename: Shumin
authors.initials: S
authors.lastname: Yang
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.
authors.forename: Jinfeng
authors.initials: J
authors.lastname: Long
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen
keywords: assembly of graphene; curved surface; gas sensor; monolayer colloid crystal template; ordered porous film; rGO-semiconductor composite; reduced graphene oxide