Low-temperature solution synthesis and characterization of enhanced titanium dioxide photocatalyst on tailored mesoporous γ-Al2O3 support
| Autor: | Sajid Hussain Siyal, Qingkui Li, Xiaochao Wu, Kunming Pan, Liujie Xu, Wang Feihong, Shizhong Wei, Yongpeng Ren |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Radical 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Adsorption Chemical engineering chemistry Mechanics of Materials law Titanium dioxide Materials Chemistry Ceramics and Composites Photocatalysis Hydrothermal synthesis Molecule Calcination 0210 nano-technology Mesoporous material |
| Zdroj: | Composites Communications. 19:82-89 |
| ISSN: | 2452-2139 |
| DOI: | 10.1016/j.coco.2020.02.009 |
| Popis: | TiO2/γ-Al2O3 composite powder was prepared by the low-temperature hydrothermal synthesis in an alcohol solution without subsequent high-temperature calcination. When the as-prepared mesoporous γ-Al2O3 particles were added into the reaction solution, their surfaces with a negative potential were adsorbed by Ti(OH)4, forming mesoporous structure with the ink bottle type. These mesopores can absorb varisized organic molecules into their cavities, so that the mesoporous γ-Al2O3 is highly suitable for use as the adsorption and degradation material. Lots of oxygen defects formed during the synthesis process can hinder the recombination of the excited electrons and holes in TiO2. More free excited holes and electrons react with dissolved oxygen and water molecules in the solution to form the key functional groups of superoxide anion radicals (·O2−) and hydroxyl radicals (·OH), making the organic dye completely degrade to CO2 and H2O. |
| Databáze: | OpenAIRE |
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