Preparation of a PANI/ZnO Composite for Efficient Photocatalytic Degradation of Acid Blue
| Autor: | Zlata Hrnjak-Murgić, Mark Žic, Ivan Vrban, Vanja Gilja, Vilko Mandić |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
in situ synthesis
Materials science Polymers and Plastics 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Article lcsh:QD241-441 chemistry.chemical_compound solar photocatalysis lcsh:Organic chemistry Specific surface area Polyaniline conductive polymer In situ polymerization Fourier transform infrared spectroscopy Photodegradation Conductive polymer PANI/ZnO composite photocatalyst acid blue dye General Chemistry 021001 nanoscience & nanotechnology 6. Clean water 0104 chemical sciences Chemistry chemistry Chemical engineering In situ chemical oxidation Photocatalysis 0210 nano-technology |
| Zdroj: | Polymers Polymers, Vol 10, Iss 9, p 940 (2018) Volume 10 Issue 9 |
| ISSN: | 2073-4360 |
| Popis: | Polyaniline/zinc oxide (PANI/ZnO) composite photocatalysts were prepared from neutral media by in situ chemical oxidation of aniline (ANI) in the presence of different amounts of diethylene glycol (DEG). The PANI/ZnO composite photocatalysts were synthesized to efficiently remove organic dye (acid blue, AB25) from model wastewater. The PANI/ZnO composite photocatalysts were studied with the intention of efficient removal of organic dye (acid blue, AB25) from wastewater to obtain low-cost heterogeneous catalysts that offer high catalytic activity and stability. The conductive PANI polymer, which absorbs Vis irradiation, was used in this work as ZnO absorbs only ultraviolet (UV) irradiation thus, the composite photocatalysts&rsquo activity was broadened into the Vis region. Characterization of the composite photocatalysts was done by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, electric conductivity, UV-Vis spectroscopy, and by specific surface area (SBET) measurements. The composites&rsquo photocatalytic activity under solar irradiation was validated by monitoring degradation of the AB25 dye. This study presented that it was possible both to prepare PANI and to prevent ZnO dissolution if in situ polymerization starts from neutral media with the addition of DEG. Additionally, efficient removal of AB25 dye, about 90% in 60 min, was achieved. The first-order rate constants of the photodegradation of AB25 by PANI/ZnO 0.02/0.024/0.04 DEG (and pure ZnO)) were computed to be 0.0272/0.0281/0.0325 (and 0.0062) min&minus 1, indicating that the morphology and surface of the photocatalysts have significantly influenced the catalytic activity. |
| Databáze: | OpenAIRE |
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