Modification of ZnIn2S4 by anthraquinone-2-sulfonate doped polypyrrole as acceptor-donor system for enhanced photocatalytic degradation of tetracycline
| Autor: | Indu Babu, Varsha Srivastava, Zahra Safaei, Samia Ben Hammouda, Sidra Iftekhar, Simo Kalliola, Bo Gao, Bhairavi Doshi, Evgenia Iakovleva, Mika Sillanpää |
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| Rok vydání: | 2017 |
| Předmět: |
Conductive polymer
General Chemical Engineering Doping General Physics and Astronomy 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Polypyrrole 01 natural sciences Anthraquinone Acceptor 0104 chemical sciences Hydroxylation chemistry.chemical_compound Sulfonate chemistry Photocatalysis Organic chemistry 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 348:150-160 |
| ISSN: | 1010-6030 |
| DOI: | 10.1016/j.jphotochem.2017.08.037 |
| Popis: | Visible-light photocatalytic degradation of tetracycline was investigated by functional modified ZnIn 2 S 4 via anthraquinone-2-sulfonate (AQS) doped polypyrrole (PPy). The best photocatalytic activity of AQS/PPy-ZnIn 2 S 4 composite photocatalyst was obtained when the weight ratio of AQS/PPy versus ZnIn 2 S 4 was 1.0% and the molar ratio of PPy to AQS was 40. After 3.0 h photocatalytic reaction, more than 98% tetracycline was removed and almost 2.0 times higher of NPOC (non-purgeable organic carbon) removal rate was obtained compared with pure ZnIn 2 S 4 . Active species trapping experiments demonstrated that O 2 − played a major role rather than the OH and photogenerated holes. The AQS doped in PPy matrix behaved as electron acceptor-donor mediator which facilitated the formation of O 2 − . Two kinds of solid phase extraction (SPE) methods were developed before gas chromatography mass spectroscopy (GC–MS) analysis and eight intermediates were detected. The degradation of tetracycline originated from the photogenerated holes via loss of some functional groups and then aromatic ring was destroyed by the oxidation of active species O 2 − and OH via hydroxylation reaction. |
| Databáze: | OpenAIRE |
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