Investigation of effective parameters in the formation of nanoporous and regular anodized aluminum oxide structures

Document Type : Research Article

Authors

Department of chemistry and Polymer, Faculty of Chemistry and Petrochemical Engineering, Standard Research Institute, Karaj, Iran

/2017.6.21.6

Abstract

In this study, anodized aluminum oxide nanostructures were prepared by anodization process under
constant potential in an oxalic acid solution that was improved with sulfuric acid. The effects of various
parameters such as voltage, electrolyte solution composition, anodizing time and type of stripping solution
of oxide layer on the morphology of prepared nanostructures were optimized and scanning electron
microscopy images were obtained. According to the results, voltage 45 V as optimized voltage and oxalic
acid improved with sulfuric acid as the best electrolyte solution were obtained. The optimized times
for first and second anodizing steps were 60 and 240 minutes, respectively, and a mixture of phosphoric
acid and chromic acid was as the perfect solution to dissolve the oxide layer. Nanopores in the prepared
samples under optimum conditions had the higher average distance and interpore distance and the porosity
was increased. Also, array and uniformity of the pore size were increased in these samples. These
nanostructures with unique properties have special applications in the field of membrane, synthesized
template for various nanostructures, sensors and biosensors.

Keywords

Main Subjects

References

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