Aerosol-assisted production of mesoporous titania microspheres with enhanced photocatalytic activity: the basis of an improved process

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dc.contributor.authorAraujo, PZen_AU
dc.contributor.authorLuca, Ven_AU
dc.contributor.authorBozzano, PBen_AU
dc.contributor.authorBianchi, HLen_AU
dc.contributor.authorArturo Soler-Illia, GJDAen_AU
dc.contributor.authorBlesa, MAen_AU
dc.date.accessioned2010-08-05T01:54:35Zen_AU
dc.date.available2010-08-05T01:54:35Zen_AU
dc.date.issued2010-06en_AU
dc.date.statistics2010-06en_AU
dc.description.abstractAn aerosol-based process was used to prepare mesoporous TiO2 microspheres (MTM) with an average diameter in the range of 0.5−1 μm. The structural characteristics and photocatalytic properties of the synthesized materials were determined. As-prepared MTM materials and those heated in air from 400 to 600°C exhibited mesoporous texture with a narrow size distribution and an inorganic framework that consisted of 4−13 nm anatase crystallites. Pore volumes for the MTM materials were in the range of 0.17−0.34 cm3 g−1. Microspheres heated to 400°C presented a locally ordered mesopore structure and possessed X-ray diffraction d spacings between 9.8 and 17.3 nm. Heating above 400°C resulted in a loss of the mesoscopic order, a decrease of the surface area, retention of the porosity, and an increase of the anatase nanoparticle size to 13 nm. The accessibility of the pore volume was measured by monitoring the uptake of gallic acid (GA) using Fourier transform IR. The MTM materials made excellent catalysts for the photodegradation of GA, with the performance being higher than that of an equivalent sample of Degussa P25. The present MTM materials are advantageous in terms of their ease of separation from the aqueous phase, and hence a novel photocatalytic process is proposed based on separate adsorption and photocatalytic decomposition steps with an improved and more rational use of both catalyst and sunlight. © 2010, American Chemical Societyen_AU
dc.identifier.citationAraujo, P. Z., Luca, V., Bozzano, P. B., Bianchi, H. L., Soler-Illia, G., & Blesa, M. A. (2010). Aerosol-assisted production of mesoporous titania microspheres with enhanced photocatalytic activity: the basis of an improved process. ACS Applied Materials & Interfaces, 2(6), 1663-1673. doi:10.1021/am100188qen_AU
dc.identifier.govdoc2206en_AU
dc.identifier.issn1944-8244en_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitleACS Applied Materials & Interfacesen_AU
dc.identifier.pagination1663-1673en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/am100188qen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2046en_AU
dc.identifier.volume2en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectPhotocatalysisen_AU
dc.subjectMicrospheresen_AU
dc.subjectAerosolsen_AU
dc.subjectGallic Aciden_AU
dc.subjectVisible radiationen_AU
dc.subjectPorosityen_AU
dc.titleAerosol-assisted production of mesoporous titania microspheres with enhanced photocatalytic activity: the basis of an improved processen_AU
dc.typeJournal Articleen_AU
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