Facile synthesis of tunable carbon modified mesoporous TiO 2 for visible light photocatalytic application
| Autor: | Xiao-Na Wei, Wen-Feng Jiang, Hui-Long Wang, Xin-Kui Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Carbonization Inorganic chemistry General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Crystallinity X-ray photoelectron spectroscopy chemistry Chemical engineering Specific surface area Photocatalysis 0210 nano-technology Mesoporous material Carbon Visible spectrum |
| Zdroj: | Applied Surface Science. 412:357-365 |
| ISSN: | 0169-4332 |
| Popis: | In this paper, we describe a simple and novel approach for preparing tunable carbon-modified mesoporous TiO2 photocatalysts by combining the in-situ carbonization of PAA-Ti/TiO2, hydrothermal reaction process and post-calcination treatment. The synthesized carbon-modified mesoporous TiO2 powders were of high crystallinity, large specific surface area and good visible light response. The carbon species were formed by the carbonization of polyacrylate (PAA). The presence of carbonates was subsequently confirmed by the XPS spectra, which significantly narrow down the band gap of TiO2. The organic group in polyacrylate served as the carbon source and carbon resulted from in-situ carbonization treatment could help to inhibit the excessive growth of TiO2 grain and enlarge the pore structure of TiO2. The amount of carbon species could be feasibly modulated by adjusting the post-calcination temperature and the surface area of the photocatalyst was enlarged further after the partial removal of carbon species. The carbon-modified mesoporous TiO2 powders exhibit excellent reproducibility and photocatalytic performance under visible light irradiation. |
| Databáze: | OpenAIRE |
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