dc.contributor | University of Concepcion | |
dc.contributor | Univ. Orleans | |
dc.contributor | Millenium Nuclei on Catalytic Processes towards Sustainable Chemistry (CSC) | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | University of Cadiz | |
dc.contributor | University of Malaga | |
dc.date.accessioned | 2019-10-06T15:27:11Z | |
dc.date.accessioned | 2022-12-19T18:27:35Z | |
dc.date.available | 2019-10-06T15:27:11Z | |
dc.date.available | 2022-12-19T18:27:35Z | |
dc.date.created | 2019-10-06T15:27:11Z | |
dc.date.issued | 2019-05-15 | |
dc.identifier | Catalysis Today, v. 328, p. 125-135. | |
dc.identifier | 0920-5861 | |
dc.identifier | http://hdl.handle.net/11449/187155 | |
dc.identifier | 10.1016/j.cattod.2018.12.008 | |
dc.identifier | 2-s2.0-85058181163 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5368193 | |
dc.description.abstract | Carbon-containing SiO 2 -based photocatalysts were prepared by the solvothermal treatment of rice husk as biogenic precursor in the presence and absence of TiO 2 and used for the photocatalytic degradation of rhodamine-B under simulated solar light. Data showed that the prepared catalysts are mainly composed of biogenic silica and displayed mesoporous character with surface areas ranging from 65 to 174 m 2 g -1 . The obtained materials showed photocatalytic activity comparable to that of commercial TiO 2 -P25 powders for the degradation of rhodamine-B under sunlight. The calcination at 350 °C improved the photocatalytic activity of the biogenic precursor by three times in the absence of TiO 2 . At converse, calcination of sample SiO 2 -TiO 2 decreased the photoactivity due to the appearance of non-photoactive TiSiO 4 crystalline phases in the catalyst, as inferred by XRD and XPS. A reaction mechanism for rhodamine-B degradation excluding the deethylation pathway has been proposed, based on the evolution of the absorbance spectra of rhodamine-B upon the photocatalytic tests. | |
dc.language | eng | |
dc.relation | Catalysis Today | |
dc.rights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | Artificial solar light | |
dc.subject | Biogenic silica | |
dc.subject | Photocatalysis | |
dc.subject | Rhodamine B | |
dc.subject | Rice husks | |
dc.title | Sunlight photoactivity of rice husks-derived biogenic silica | |
dc.type | Artículos de revistas | |