Unexpected Link between the Template Purification Solvent and the Structure of Titanium Dioxide Hollow Spheres
| Autor: | Kata Kovács, Kornélia Baán, Klara Hernadi, Zsolt Pap, Klára Magyari, Tamás Gyulavári, Gábor Veréb, Anna Szabó |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Anatase
Materials science purification chemistry.chemical_element acetone 02 engineering and technology lcsh:Chemical technology 010402 general chemistry 01 natural sciences Catalysis lcsh:Chemistry chemistry.chemical_compound Acetone phenol lcsh:TP1-1185 Physical and Theoretical Chemistry carbon spheres titanium dioxide 021001 nanoscience & nanotechnology equipment and supplies 0104 chemical sciences Solvent lcsh:QD1-999 Chemical engineering chemistry Rutile hollow spheres Titanium dioxide Photocatalysis ethanol 0210 nano-technology Carbon |
| Zdroj: | Catalysts Volume 11 Issue 1 Catalysts, Vol 11, Iss 112, p 112 (2021) |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal11010112 |
| Popis: | Carbon spheres were applied as templates to synthesize titanium dioxide hollow spheres. The templates were purified with either ethanol or acetone, and the effects of this treatment on the properties of the resulting titania were investigated. The photocatalytic activity of the catalysts was measured via the decomposition of phenol model pollutant under visible light irradiation. It was found that the solvent used for the purification of the carbon spheres had a surprisingly large impact on the crystal phase composition, morphology, and photocatalytic activity. Using ethanol resulted in a predominantly rutile phase titanium dioxide with regular morphology and higher photocatalytic activity (r0,phenol = 3.9 × 10&minus 9 M∙s&minus 1) than that containing mainly anatase phase prepared using acetone (r0,phenol = 1.2 × 1), surpassing the photocatalytic activity of all investigated references. Based on infrared spectroscopy measurements, it was found that the carbon sphere templates had different surface properties that could result in the appearance of carbonate species in the titania lattice. The presence or absence of these species was found to be the determining factor in the development of the titania&rsquo s properties. |
| Databáze: | OpenAIRE |
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