Synthesis, Characterization and Photocatalytic Behavior ofSiO2@nitrized-TiO2Nanocomposites Obtained by aStraightforward Novel Approach
| Autor: | Claudia Triolo, Luca Spitaleri, Paola Lanzafame, Zainab Dahrouch, Abdellatif Aaliti, Georgia Papanikolaou, Antonino Gulino, Sandra Lo Schiavo, Amani Khaskhoussi, Patrizia Primerano |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Anatase
Materials science law.invention N−TiO2 chemistry.chemical_compound Adsorption N-TiO2 law Methyl orange Calcination mixed oxides N-TiO2 photoactivity POSS SiO2@TiO2 QD1-999 SiO2@TiO2 POSS Nanocomposite Full Paper mixed oxides Nanoporous General Chemistry Full Papers Chemistry Chemical engineering chemistry Photocatalysis Mixed oxide SiO2 photoactivity |
| Zdroj: | ChemistryOpen ChemistryOpen, Vol 10, Iss 10, Pp 1033-1040 (2021) |
| Popis: | We report on the facile synthesis of SiO2@nitrized‐TiO2 nanocomposite (NST) by calcination of TiO2 xerogel with OctaAmmonium POSS® (N‐POSS; POSS=polyhedral oligomeric silsesquioxanes). The as‐obtained nanoporous mixed oxide is constituted by uniformly distributed SiO2 and nitrized‐TiO2, where the silica component is present in an amorphous state and TiO2 in an anatase/rutile mixed phase (92.1 % vs. 7.9 %, respectively) with very small anatase crystallites (3.7 nm). The TiO2 lattice is nitrized both at interstitial and substitutional positions. NST features a negatively charged surface with a remarkable surface area (406 m2 g−1), endowed with special adsorption capabilities towards cationic dyes. Its photocatalytic behavior was tested by following the degradation of standard aqueous methylene blue and methyl orange solutions under UV and visible light irradiation, according to ISO 10678:2010. For comparison, analogous investigations were carried out on a silica‐free N−TiO2, obtained by using NH4Cl as nitrogen source. Annealing of TiO2 xerogel in the presence of OctaPOSS‐ammonium leads to formation of the SiO2@nitrized‐TiO2 nano‐mixed oxide. Due to its high surface area and negatively charged surface, this material has shown promising behavior for the photodegradation of anionic dyes. |
| Databáze: | OpenAIRE |
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