Effect of several commercial rubber as substrates for zinc oxide in the photocatalytic degradation of methylene blue under visible irradiation
| Autor: | M. Z. Salihin, R. Nordin, W. I. Nawawi, N. Latiff, Z. A. M. Ishak, R. Yusof |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering rubber chemistry.chemical_element Zinc lcsh:Chemical technology chemistry.chemical_compound Natural rubber lcsh:TA401-492 Materials Chemistry lcsh:TP1-1185 Irradiation Physical and Theoretical Chemistry Photocatalytic degradation Organic Chemistry zinc oxide photocatalytic visible irradiation chemistry visual_art visual_art.visual_art_medium methylene blue lcsh:Materials of engineering and construction. Mechanics of materials Methylene blue Nuclear chemistry |
| Zdroj: | eXPRESS Polymer Letters, Vol 14, Iss 9, Pp 838-847 (2020) |
| ISSN: | 1788-618X |
| DOI: | 10.3144/expresspolymlett.2020.69 |
| Popis: | A new approach of mechanical preparation of photocatalyst zinc oxide (ZnO)/rubbers from four types of rubbers: styrene butadiene rubber (SBR), ethylene propylene diene monomer (EPDM), natural rubber (NR), and epoxidized natural rubber (ENR) with 50% epoxidation is presented. This technique is simple, fast and cost effective as ZnO/rubbers were mechanically mixed using conventional two-roll mill at 27 °C for 10 min and compressed into flat sheet. The characteristics of photocatalyst were studied by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-Vis) and field emission scanning electron microscope (FESEM). The photocatalytic activity of ZnO/rubbers was evaluated using methylene blue (MB) as a model pollutant under visible light for 300 min. The photocatalytic degradation efficiency of ZnO/SBR is nearly as good as that of ZnO powder (87.32%) compared to ZnO/NR, ZnO/EPDM and ZnO/ENR. This is due to the highest index of conjugated carbon-carbon bond of SBR and hydrogen bonding between ZnO and SBR. The formation of hydrogen bonding was confirmed by FTIR and reduction of energy band gap of ZnO/SBR. The photocatalytic degradation of MB with ZnO/SBR was could be fitted by pseudo-first-order kinetics of the Langmuir-Hinshelwood model. |
| Databáze: | OpenAIRE |
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