Optimization of effective parameters in the synthesis of nanopore anodic aluminum oxide membrane and arsenic removal by prepared magnetic iron oxide nanoparicles in anodic aluminum oxide membrane via ultrasonic-hydrothermal method.

Author(s) Maghsodi, A.; Adlnasab, L.; Shabanian, M.; Javanbakht, M.
Journal Ultrason Sonochem
Date Published 2018 Nov

In this study, a new anodized aluminum oxide (AAO) nanostructure membrane was synthesized by anodization process under a constant voltage, in oxalic acid solution that was improved with trace amounts of sulfuric acid at room temperature. The effect of various parameters on the morphology of the synthesized nanostructures such as voltage, electrolyte composition, anodization time and type of stripping solution were investigated. According to the results, corrosion of the walls, size regularity, diameter and number of the pores increased in the presence of sulfuric acid (0.018 mol.L). Nitrogen adsorption-desorption analysis confirmed significant porosity, array and uniformity of the pore size in the synthesized nanoporous membrane. A new modification method was used based on ultrasonic-hydrothermal method to modify the synthesized AAO with FeO/SiO nanoparticles for metals and metalloids removal from aqueous solution. In this method, FeO/SiO nanoparticles were placed very regularly and uniformly on the surface and inside the pores. This modification was confirmed by characterization techniques. The modified AAO@FeO/SiO membrane showed excellent results for removing arsenic from aqueous media.

DOI 10.1016/j.ultsonch.2018.07.003
ISSN 1873-2828
Citation Ultrason Sonochem. 2018;48:441452.

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