Registro completo de metadatos
| Campo DC | Valor | Lengua/Idioma |
|---|---|---|
| dc.creator | Rengifo Herrera, Julian Andres | - |
| dc.creator | Blanco, Mirta Noemi | - |
| dc.creator | Wist,Julien | - |
| dc.creator | Florian, Pierre | - |
| dc.creator | Pizzio, Luis Rene | - |
| dc.date | 2018-05-18T15:15:41Z | - |
| dc.date | 2018-05-18T15:15:41Z | - |
| dc.date | 2016-07 | - |
| dc.date | 2018-04-05T18:36:52Z | - |
| dc.date.accessioned | 2019-04-29T15:49:21Z | - |
| dc.date.available | 2019-04-29T15:49:21Z | - |
| dc.date.issued | 2016-07 | - |
| dc.identifier | Rengifo Herrera, Julian Andres; Blanco, Mirta Noemi; Wist,Julien; Florian, Pierre; Pizzio, Luis Rene; TiO2 modified with polyoxotungstates should induce visible-light absorption and high photocatalytic activity through the formation of surface complexes; Elsevier Science; Applied Catalysis B: Environmental; 189; 7-2016; 99-109 | - |
| dc.identifier | 0926-3373 | - |
| dc.identifier | http://hdl.handle.net/11336/45569 | - |
| dc.identifier | CONICET Digital | - |
| dc.identifier | CONICET | - |
| dc.identifier.uri | http://rodna.bn.gov.ar:8080/jspui/handle/bnmm/302964 | - |
| dc.description | TiO2 nanospherical particles prepared by the sol-gel method were modified with tungstophosphoric (TPA) and tungstosilicic acid (TSA) at 30% (w/w) and then annealed at 500 °C for 2 h. Materials were characterized by multitechniques, such as scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), FT-Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), 31P, 1H and 29Si magic angle spinning nuclear magnetic resonance (MAS-NMR). Acidity and isoelectric point measurements were also performed. DRS results showed evidence of visible light absorption of TiO2-TPA and TiO2-TSA. MAS-NMR, XPS and FT-Raman characterization revealed evidence of a strong interaction between the Keggin anion of TPA or TSA and TiO2 surfaces, possibly promoted by the formation of surface heteropolyacid-TiO2 complexes; the latter should be responsible of its visible light absorption. Photocatalytic activity was evaluated in the degradation of malachite green (MG), a cationic triphenylmethane dye, and 4-chlorophenol (4-CP) aqueous solutions under UV-A and visible light irradiations. Under UV-A light, TPA-TiO2 and TSA-TiO2 materials showed high photocatalytic activity towards MG degradation, even higher than that of TiO2 P-25. When 4-CP was degraded, TiO2 P-25 exhibited higher photocatalytic activity. Under visible light irradiation and using the modified photocatalysts, malachite green oxidation was achieved, while 4-chlorophenol reached almost 20% of degradation. Mechanisms of photocatalytic oxidation either under UV-A or visible irradiation are discussed. | - |
| dc.description | Fil: Rengifo Herrera, Julian Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina | - |
| dc.description | Fil: Blanco, Mirta Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina | - |
| dc.description | Fil: Wist,Julien. Universidad del Valle. Fundación Samanea; Colombia | - |
| dc.description | Fil: Florian, Pierre. Centre National de la Recherche Scientifique; Francia | - |
| dc.description | Fil: Pizzio, Luis Rene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina | - |
| dc.format | application/pdf | - |
| dc.format | application/pdf | - |
| dc.format | application/pdf | - |
| dc.format | application/pdf | - |
| dc.language | eng | - |
| dc.publisher | Elsevier Science | - |
| dc.relation | info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1016/j.apcatb.2016.02.033 | - |
| dc.relation | info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0926337316301229 | - |
| dc.rights | info:eu-repo/semantics/restrictedAccess | - |
| dc.rights | https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ | - |
| dc.source | reponame:CONICET Digital (CONICET) | - |
| dc.source | instname:Consejo Nacional de Investigaciones Científicas y Técnicas | - |
| dc.source | instacron:CONICET | - |
| dc.subject | Tungstophosphoric acid | - |
| dc.subject | Tungstosilicic acid | - |
| dc.subject | Heterogeneous photocatalysis | - |
| dc.subject | TiO2with visible light absorption | - |
| dc.subject | Heteropolyacids | - |
| dc.subject | Otras Ingeniería Química | - |
| dc.subject | Ingeniería Química | - |
| dc.subject | INGENIERÍAS Y TECNOLOGÍAS | - |
| dc.title | TiO2 modified with polyoxotungstates should induce visible-light absorption and high photocatalytic activity through the formation of surface complexes | - |
| dc.type | info:eu-repo/semantics/article | - |
| dc.type | info:eu-repo/semantics/publishedVersion | - |
| dc.type | info:ar-repo/semantics/articulo | - |
| Aparece en las colecciones: | CONICET | |
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