Nanoscale silica-coated graphene oxide and its demulsifying performance in water-in-oil and oil-in-water emulsions
| Autor: | Wenxiang Hu, Ming Yang, Enxiong Zhu, Liwei Shen, Jianguo Peng, Xuening Feng, Zhiyun Lei, Ying Yang, Xuanwei Zhang, Yuanzhu Mi |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.product_category Nanocomposite Scanning electron microscope Graphene Health Toxicology and Mutagenesis Oxide Aqueous two-phase system Infrared spectroscopy Water General Medicine Silicon Dioxide Pollution law.invention chemistry.chemical_compound Chemical engineering chemistry law Emulsion Bottle Environmental Chemistry Emulsions Graphite business |
| Zdroj: | Environmental science and pollution research international. 28(39) |
| ISSN: | 1614-7499 |
| Popis: | In current work, GO@SiO2 nanocomposite was prepared by coating nanoscale silica onto graphene oxide (GO). GO@SiO2 was characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (IF-IR). Additionally, the demulsifying performance of GO@SiO2 was investigated by bottle test. The results showed that GO@SiO2 had a good demulsifying performance in both oil-in-water (O/W) and water-in-oil (W/O) emulsions. When the concentration of GO@SiO2 was 200 ppm in the O/W emulsion, the optimal light transmittance of aqueous phase (LTA) and corresponding oil removal rate (ORR) at room temperature could reach 86.9% and 99.48%, respectively. Also, GO@SiO2 had an excellent salt tolerance under acidic condition. Furthermore, GO@SiO2 also could demulsify the W/O emulsion, and the efficiency at 70 °C could reach 80.5% when the concentration was 400 ppm. |
| Databáze: | OpenAIRE |
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