Abstract
Low-cost, fast, and scalable method to produce Graphene Oxide (GO) membrane for water purification was studied. GO was synthesized using Tour’s Method. Results of XRD, FTIR and SEM confirmed the formation of GO. The synthesized GO was dissolved in deionized water to form a dispersed ink. The viscosity of ink was increased by adding ethylene glycol and glycerin. The particle sizes of GO were in the range of ~200-350 nm. The ink was printed on commercially available PVDF membrane using ink-jet printer. The membrane was first attached over transparent film for support. The ink-jet printer successfully printed on the membrane, giving a yellowish-brown color to the membrane. A coating thickness of 11.5 µm was obtained. Membrane was used, after drying at 50°C for 2 hours, for water filtration using gravimetric method. The GO membrane fabricated using printing technique offered high rejection of salts, making it cost and energy efficient. The membrane rejected 90% of calcium carbonate, 98% of sulfate, and 71% of nitrate. The TDS of the sample was decreased by 78.6% of its value. The printing of GO using ink-jet printing can be a promising route to low cost fabrication of GO membrane.
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