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Comparison of the effects generated by the dry-soft grinding and the photodeposition of Au and Pt processes on the visible light absorption and photoactivity of TiO2

dc.creatorGaleano L.
dc.creatorValencia S.
dc.creatorMarín J.M.
dc.creatorRestrepo G.
dc.creatorNavío J.A.
dc.creatorHidalgo M.C.
dc.date2019
dc.date.accessioned2020-04-29T14:54:01Z
dc.date.available2020-04-29T14:54:01Z
dc.identifier.issn20531591
dc.identifier.urihttp://hdl.handle.net/11407/5788
dc.descriptionThe influence of dry-soft grinding and photodeposition of gold (Au) or platinum (Pt) in the improvement of the photoactivity of TiO2 synthesized by an integrated sol-gel and solvothermal method was studied. TiO2 was modified by a dry-soft grinding process in a planetary ball mill (TiO2(G)). Subsequently, Au or Pt particles were photodeposited in both unmodified TiO2 and TiO2(G) obtaining Au-TiO2, Pt-TiO2, Au-TiO2(G), and Pt-TiO2(G) materials. The photoactivity of the materials was evaluated in the phenol photodegradation under simulated solar radiation. Pt-TiO2 showed the greatest degree of photoactivity improvement in comparison with TiO2 and TiO2-P25. The dry-soft grinding process led to a high photocatalytic activity of TiO2(G) that was similar to Pt-TiO2 activity as consequence of a slight increase in the crystallinity in TiO2(G) due to an additional anatase formation in comparison with TiO2. However, further photocatalytic improvement in TiO2(G) were not achieved with the addition of Au or Pt. Therefore, the dry-soft grinding treatment and noble metal deposition led to similar improvements in the photocatalytic activity of TiO2 for phenol oxidation. © 2019 IOP Publishing Ltd.
dc.language.isoeng
dc.publisherInstitute of Physics Publishing
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85072724520&doi=10.1088%2f2053-1591%2fab4316&partnerID=40&md5=6f51903ecb35fef936d727157f4958db
dc.sourceMaterials Research Express
dc.subjectgrinding process
dc.subjectphotodeposition
dc.subjectTiO2
dc.subjectCrystallinity
dc.subjectGrinding (machining)
dc.subjectLight absorption
dc.subjectPhenols
dc.subjectPhotocatalytic activity
dc.subjectPlatinum
dc.subjectSol-gels
dc.subjectTitanium dioxide
dc.subjectGrinding process
dc.subjectHigh photocatalytic activities
dc.subjectPhenol photodegradation
dc.subjectPhoto-deposition
dc.subjectSimulated solar radiations
dc.subjectSolvothermal method
dc.subjectTiO2
dc.subjectVisible light absorption
dc.subjectPhosphorus compounds
dc.titleComparison of the effects generated by the dry-soft grinding and the photodeposition of Au and Pt processes on the visible light absorption and photoactivity of TiO2
dc.typeArticleeng
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.publisher.programIngeniería Ambiental
dc.identifier.doi10.1088/2053-1591/ab4316
dc.relation.citationvolume6
dc.relation.citationissue10
dc.publisher.facultyFacultad de Ingenierías
dc.affiliationGaleano, L., Grupo de Investigaciones y Mediciones Ambientales (GEMA), Universidad de Medellín, Carrera 87 No 30-65, Medellín, Colombia; Valencia, S., Grupo de Investigación Integra, Tecnológico de Antioquia, Institución Universitaria, Calle 78B No 72A-220, Medellín, Colombia; Marín, J.M., Grupo Procesos Fisicoquímicos Aplicados, Facultad de Ingeniería, Universidad de Antioquia SIU/UdeA, Calle 70 No. 52-21, Medellín, Colombia; Restrepo, G., Grupo Procesos Fisicoquímicos Aplicados, Facultad de Ingeniería, Universidad de Antioquia SIU/UdeA, Calle 70 No. 52-21, Medellín, Colombia; Navío, J.A., Instituto de Ciencia de Materiales de Sevilla (ICMS). Centro Mixto CSIC-Universidad de Sevilla, Américo Vespucio 49, Sevilla, 41092, Spain; Hidalgo, M.C., Instituto de Ciencia de Materiales de Sevilla (ICMS). Centro Mixto CSIC-Universidad de Sevilla, Américo Vespucio 49, Sevilla, 41092, Spain
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