This study was aimed to investigate the effect of ZnO-decorated GO nanocomposite material loaded with different weight percent of ZnO toward polysulfone (PSF) mixed-matrix membrane (MMM) performance enhancement. ZnO-decorated GO nanocomposite material was loaded with 1, 5, 10 and 20 wt. % ZnO was blended with PSF polymer and fabricated through phase inversion process. The performance of the fabricated MMMs were evaluated by measuring membrane permeability, bovine serum albumin rejection (BSA) and flux recovery ratio (FRR). Experiment results demonstrated that the PSF/ZnO-GO MMM performances were greatly improved where 10 wt. % ZnO loaded into ZnO-decorated GO nanomaterial exhibited the highest permeability (5.35 L/m 2 •h•bar) and BSA retention at all pH state among all fabricated mixed-matrix membranes. Additionally, FRR was also dramatically improved attributed to the smoother membrane surface. This work has shown that a well distribution of ZnO with the help of GO nanosheet as a dispersing agent blended with PSF polymer to form PSF/ZnO-GO MMM was a promising approach in creating better ultrafiltration (UF) membrane with a better hydrophilicity, permeability, and cleaning efficiency for the used in food industry in future.
This work aimed is to synthesis a well dispersed zinc oxide (ZnO) nanoparticles (NPs) decorated on graphene oxide (GO) nanosheet with a practical way by using sol-gel technique. Zinc acetate dehydrate (Zn(CH 3 COO) 2 •2H 2 O) was used as precursor of ZnO and absolute ethanol as solvent. 1 weight percent (wt%), 5 wt%, 10 wt%, and 20 wt% of ZnO was decorated on GO nanosheet. A series of analysis was carried out to characterize the synthesized ZnO-decorated GO nanocomposite material. The results of XRD analysis show some long area of peak at 25° to 80° allocate for ZnO in the ZnO-decorated GO nanocomposite material. By performing zeta potential analysis, the findings show that there was increment of negative surface charge on ZnO-decorated GO nanocomposite material. The experiment result also found that the hydrodynamic particle size of ZnO-decorated GO nanocomposite material become larger when high ZnO loaded. FESEM micrographs demonstrated that spherical-shaped of ZnO NPs appeared on the GO nanosheet with further proved by EDX where the content of ZnO-decorated GO nanocomposite material was composed by 71.3 wt% of C, 17 wt% of O, and additional element of 11.7 wt% of Zn. Thus, it can summarize that the synthesized ZnO-decorated GO nanocomposite material was high in purity. The findings in this study proved that ZnO NPs loading in ZnO-decorated GO nanocomposite material were successfully synthesized by sol-gel method. A ZnO-decorated GO nanocomposite material with layering ZnO NPs on GO nanosheet was produced.
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