Photocatalytic application of porous Au/TiO2 nano-hybrids prepared by a templating technique

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dc.contributor.authorWang, XDen_AU
dc.contributor.authorMitchell, DRGen_AU
dc.contributor.authorPrince, KEen_AU
dc.contributor.authorCaruso, RAen_AU
dc.date.accessioned2022-05-18T02:35:56Zen_AU
dc.date.available2022-05-18T02:35:56Zen_AU
dc.date.issued2008-07-30en_AU
dc.date.statistics2021-09-21en_AU
dc.descriptionHardcopy held by ANSTO Library at DDC 621.48/7en_AU
dc.description.abstractGold doping or deposition in TiO2 can effectively improve the photocatalytic performance of the titania by either modifying the bandgap and thereby inducing photoactivity under visible light or decreasing the recombination of excited electron and hole. Templating techniques can produce materials with designed morphology and porosity. The objective of this project was to couple controlled porosity allowing faster molecule diffusion through the porous channels with gold deposition to further increase the photocatalytic activity of TiO2. Templating and sol-gel techniques were combined to synthesise Au/TiO2 nano-hybrids with improved photocatalytic activity. The porous structures directed by the agarose gel template were examined by SEM. X-ray diffraction analysis ascertained the materials to be anatase phase, and the gold peaks were observed when the gold content was over 0.25 wt%. TEM further confirmed the highly porous structure of the composites (Figure 1). The gold particle sizes, influenced by both the synthesis methods and initial gold content, ranged from ~ 2 to 40 nm. The gold distribution and content were identified by means of secondary ion mass spectrometer and inductively coupled plasma mass spectrometry, respectively. Finally, the catalytic performance of the Au/TiO2 was assessed by photodecomposition of methylene blue under UV light. The influence of parameters such as synthesis methods, material properties and photocatalytic test conditions (e.g., pH, catalyst and dye concentration) on the photocatalytic efficiency was also investigated. The photocatalytic efficiency improved by a maximum 40% for the Au/TiO2 sample with a gold particle size of 2 nm and 2 wt % gold content.en_AU
dc.identifier.citationWang, X., Mitchell, D. R. G., Prince, K., & Caruso, R. A. (2008). Photocatalytic application of porous Au/TiO2 nano-hybrids prepared by a templating technique. Paper presented to the 17th International Conference on Photochemical Conversion and Storage of Solar Energy 2008, Sunday 27 July - Friday 1 August 2008, Sydney Convention and Exhibition Centre, Australia. (pp.116)en_AU
dc.identifier.conferenceenddate1 August 2008en_AU
dc.identifier.conferencename17th International Conference on Photochemical Conversion and Storage of Solar Energyen_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate27 July 2008en_AU
dc.identifier.pagination116en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13179en_AU
dc.language.isoenen_AU
dc.publisherInternational Conference on the Photochemical Conversion and Storage of Solar Energyen_AU
dc.subjectGolden_AU
dc.subjectTitaniumen_AU
dc.subjectPhotocatalysisen_AU
dc.subjectExcited statesen_AU
dc.subjectMaterialsen_AU
dc.subjectMorphologyen_AU
dc.subjectPorosityen_AU
dc.subjectDepositionen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectScanning electron microscopyen_AU
dc.titlePhotocatalytic application of porous Au/TiO2 nano-hybrids prepared by a templating techniqueen_AU
dc.typeConference Abstracten_AU
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