An Electrospun Zein/Graphene Oxide Nanofibrous Composite: Typical Application as a New Biopolymeric Adsorbent in Removal of Methylene Blue and Malachite Green Dyes from Aqueous Media
نویسندگان
1 Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran.
2 Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran.
3 Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran.
4 Department of Analytical Chemistry, Faculty of Chemistry, Urmia University, P.O. Box: 165‐5715944931, Urmia, Iran
doi
10.30509/pccc.2021.81679چکیده
In this study, for the first time, an electrospun nanofibrous (Nfs) composite was prepared from Zein biopolymer and graphene oxide (Ze-GONfs). The effective parameter in electrospining preparation of zrin-GO nanofiber was the amount of zein. Highly mechanical stable membranes were obtained using 30% w/v in glacial acetic acid. The fiber diameter distribution was in the range of 41–50 nm (zein), 31–40 nm (0.5% GO), 29–39 nm (1.0% GO), and 28–37 nm (1.5% GO). The structural morphology of the nanofibrous composites were characterized using Fourier transform infrared, scanning electron microscope (SEM) and X-ray diffractometer. As an application of the prepared biopolymeric nanofibrous, the removal of malachite green (MG) and methylene blue (MB) (as cationic industrial dyes) from aqueous medium using Ze-GONfs was investigated as a model. The effect of various parameters such as solution pH, adsorbent dosage, dye concentration, time and temperature were evaluated by the Ze-GONfs. Detailed analysis of the adsorption kinetics showed that the adsorption process followed a pseudo-second-order model. The adsorption isotherm was best fitted by the Langmuir model. The thermodynamic results showed that MB and MG adsorption onto the Ze-GONfs was endothermic and spontaneous.
