Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives
| Autor: | Mina Medić, Goran Dražić, Jovan M. Nedeljković, Marija Vasić, Aleksandra R. Zarubica, Lidija V. Trandafilović, Miroslav D. Dramićanin |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
General Chemical Engineering Nanoparticle 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Charge-transfer complex 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Transmission electron microscopy Specific surface area Photocatalysis Surface modification Crystal violet Absorption (chemistry) 0210 nano-technology |
| Zdroj: | RSC Advances |
| Popis: | Magnesium-orthotitanate (Mg2TiO4) nano-powder was synthesized using a Pechini-type polymerized complex route. Microstructural characterization involving transmission electron microscopy, X-ray diffraction analysis and nitrogen adsorption-desorption isotherms indicated that well-crystallized Mg2TiO4 nanoparticles are small in size (about 10 nm) with large specific surface area (72 m(2) g(-1)). The surface modification of Mg2TiO4 nano-powders with 5-amino salicylic acid and catechol induced a significant shift of absorption to the visible spectral region due to charge transfer complex formation. It should be emphasized that tunable optical properties of Mg2TiO4 nano-powders have never been reported in the literature. Degradation reactions of an organic dye (crystal violet) were used to test the photocatalytic ability of pristine and surface-modified Mg2TiO4 nano-powders under illumination in different spectral regions. Excitation with UV light indicated, for the first time, photocatalytic ability of Mg2TiO4. Also, improved photocatalytic performance of surface-modified Mg2TiO4 nano-powders was found in comparison to unmodified ones. |
| Databáze: | OpenAIRE |
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