title: Synthesis of highly ordered mesoporous Co3O4 for gas sensing.
abstract: Highly ordered mesoporous Co3O4 nanostructures were prepared using SBA-15 silica as hard templates. The mesoporous structures were characterized by X-ray diffraction, high resolution transmission electron microscopy, and N2 adsorption/desorption isotherm analysis. The results demonstrated that the as-prepared mesoporous Co3O4 has an ordered P6mm symmetric mesoporous structure. The optical absorption properties of the mesoporous Co3O4 were investigatted by UV-Vis spectroscopy and the results indicate that the mesoporous Co3O4 materials are semiconducting with direct band gaps of 2, 1.385 and 0.38 eV. The gas-sensing performance of the mesoporous Co3O4 was tested towards a series of typical solvents. They demonstrated a good sensing performance towards these vapour with rapid response and high sensitivity at low operating temperature.
authors.affiliation: Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney, NSW 2007, Australia.
authors.forename: D W
authors.initials: DW
authors.lastname: Su
authors.forename: H
authors.initials: H
authors.lastname: Liu
authors.forename: H J
authors.initials: HJ
authors.lastname: Ahn
authors.forename: G X
authors.initials: GX
authors.lastname: Wang
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D003217:Conductometry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000032:analysis* / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D012666:Semiconductors
chemical_list: D005740:Gases; D010087:Oxides; D003035:Cobalt; C060728:cobalt oxide