Abstract and References
Transactions on Science and Technology Vol. 4, No. 3, 202-208, 2017

GO@ZIF-67/PAN Mixed Matrix Membrane for the Adsorptive and Photocatalytic Removal of Methylene Blue

Von Fei Cheong, Rosli Wong Suzanna, Ka Ping Lim, Weng Fung Ng, Pak Yan Moh

ABSTRACT
 GO@ZIF-67/PAN mixed-matrix membrane (MMM) was prepared using casting method. The adsorption and photocatalytic activity of GO@ZIF-67/PAN MMM towards the removal of methylene blue dye (MB) in water was evaluated. It was found that the MMM performs better when GO@ZIF-67 composite with higher amount of GO were used as the filler. The GO@ZIF-67/PAN MMM with 25 wt% of GO in the composite was able to remove about 72.9%, 90.5%, and 86.4% of MB in dark, UV-A, and visible light, respectively, within 9 hours of reaction time. The photocatalytic removal of MB by GO@ZIF-67/PAN MMM was well fitted to Langmuir-Hinshelwood pseudo-first order reaction kinetics model, which indicates that the removal process requires the adsorption of MB on the surface of MMM followed by the photocatalytic decomposition of MB on the surface of GO@ZIF-67/PAN MMM. Besides, the results also revealed that GO@ZIF-67/PAN MMM can be photoexcited under UV-A and visible light irradiation. This study opens a new pathway for the exploration of MMM in pollution control under a wider light responsive range, i.e. UV-visible regions.

KEYWORDS: Adsorption; Photocatalytic degradation; Graphene oxide; Metal-organic framework; Polyacrylonitrile
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