Photocatalytic Degradation of Phenol over Highly Visible-Light Active BiOI/TiO2 Nanocomposite Photocatalyst
| Autor: | Jiraporn Ketwaraporn, Weerasak Chomkitichai, Burapat Inceesungvorn, Sukon Phanichphant, Natkritta Boonprakob, Aimon Wanaek |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
phenol
Materials science Band gap Composite number 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Bismuth oxyiodide nanocomposites Phenol Composite material Photocatalytic degradation Nanocomposite titanium dioxide General Engineering 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering lcsh:TA1-2040 Titanium dioxide Photocatalysis 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) Visible spectrum |
| Zdroj: | Engineering Journal, Vol 21, Iss 1 (2017) |
| ISSN: | 0125-8281 |
| Popis: | BiOI/TiO 2 nanocomposites were successfully prepared by the two-step method, co-precipitation/solvothermal method. The amount of BiOI in the composites were varied as 0, 5.0, 7.5, 10.0 and 12.5 mol%. XRD results exhibited sharp and narrow diffraction peaks of both BiOI and TiO 2 in all composite samples. Morphologies of as-prepared samples consisted of spherical shapes of TiO2 and nanosheets of BiOI. Difuse Reflectance UV–visible (DR–UV–vis) spectra of composites drastically shifted into the visible range and the reduced band gap energies were observed. The composits obviously showed an enhanced phenol degradation of ca. 6 times higher than that of pure BiOI, pure TiO 2 and Degussa P25. The maximum photocatalytic activity of ca. 68% was found for 10.0 mol% BiOI/TiO 2 nanocomposite because of its increased visible-light-harvesting ability and its efficient electron–hole separation efficiency as observed from DR–UV–vis and PL spectra results. |
| Databáze: | OpenAIRE |
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