Green Synthesis of ZnO Nanoparticles by an Alginate Mediated Ion-Exchange Process and a case study for Photocatalysis of Methylene Blue Dye

Applied Nanotechnology and Nanoscience International Conference 2016

Cheng Keong, Choo^1 ; Sunitha Vivek, Yamini^1 ; Salamatinia, Babak^1 ; Amini Horri, Bahman^2

Discipline of Chemical Engineering, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor

46150, Malaysia^1

Department of Chemical Engineering, Faculty of Engineering, University of Surrey, Guildford

GU2 7XH, United Kingdom^2

关键词: Calcination temperature;    High crystallinity;    Ion exchange process;    Methylene blue dye;    Optical activity;    Photocatalytic efficiency;    Photodegradation of methylene blue;    Zinc oxide (ZnO);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/829/1/012014/pdf
DOI  :  10.1088/1742-6596/829/1/012014

来源: IOP

【 摘 要 】

In this study, zinc oxide (ZnO) was prepared via extrusion-dripping method through an ion exchange mediated process using sodium alginate. The samples were synthesized at 500 °C and 600 °C to study the effect of calcination temperature. The morphology, microstructure and optical activity of the calcined ZnO nanoparticles were analyzed by TGA, FESEM and XRD. It was found that ZnO nanoparticles synthesized at 600 °C was of higher purity with high crystallinity. To enhance the photocatalytic efficiency of zinc oxide, ZnO/NCC films were synthesized at varying ZnO loading fractions of 10 wt%, 15 wt%, 20 wt% and 25 wt% and were evaluated by photodegradation of Methylene blue dye and the highest dye percentage removal is found to be 96% which is obtained at ZnO loadings of 25 wt%. The usage of ion-exchange process has shown promising results in producing ZnO of desirable characteristics.