Fabrication and characterization of graphene oxide-based electodes for water treatment systems application
<p>The aim of this study was to fabricate and characterize graphene oxide (GO) based electrodes for two types of home-developed water treatment system, namely electrodeposition (ED) and capacitive deionization (CDI) for copper ions (Cu2+) and methylene blue (MB) dye removal. Electroche...
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| Format: | thesis |
| Language: | eng |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://ir.upsi.edu.my/detailsg.php?det=7384 |
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| Summary: | <p>The aim of this study was to fabricate and characterize graphene oxide (GO) based electrodes for two types of home-developed water treatment system, namely electrodeposition (ED) and capacitive deionization (CDI) for copper ions (Cu2+) and methylene blue (MB) dye removal. Electrochemical exfoliation was utilized to synthesize GO using custom-made triple-tails (TC14) surfactant. Hydrazine hydrate was utilized as reduction agent to produce TC14-rGO. The TC14-GO and TC14-rGO were then coated via spray coating method on stainless steel (SS) which further utilized as electrodes in ED water treatment system. Meanwhile for CDI system, the TC14-GO sample was sprayed and immersed in activated carbon fiber cloth (ACFC) electrodes. The TC14-GO-based electrodes were characterized using electron microscopy, energy dispersive X-ray, high resolution transmission electron microscopy, X-ray diffraction, fourier transform infrared spectroscopy, UV-Vis spectroscopy and micro-Raman spectroscopy. The atomic absorption spectroscopy and UV-Vis spectroscopy were used to determine the amount of Cu2+ and MB dye removal. The finding shows that the removal efficiency of Cu2+ reaches 98% for ED water treatment system assisted with constant magnetic field (CMF) using TC14-GO-/SS cylindrical electrode within reaction time of 6 hours. Meanwhile, for CDI flow through electrodes water treatment system, the TC14-GO-ACFC electrodes produced via immersion method have successfully removed Cu2+ from 100 ppm to 1.8 ppm. The TC14-GO-ACFC immersion electrodes for CDI flow through electrodes had successfully removed MB dye at various concentration level of 25, 50, 75 and 100 ppm within 3, 4, 5 and 6 hours respectively during the electrosorption process. In conclusion, the TC14-GO is a suitable material to be utilized as GO-based electrode for high Cu2+ removal in both ED and CDI application. TC14-GO also enhanced MB dye removal in CDI water treatment system. The implications of this study were a novel, green, cheaper and eco-friendlier concept for the fabrication of TC14-GO based electrodes to be used in both ED and CDI water treatment system.</p> |
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