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Synthesis, Characterization and Bactericide Properties of Al2O3 Nanoparticles and Al2O3-PAN Membranes for Alternative Water Disinfection Methods

Published online by Cambridge University Press:  09 January 2017

Abdiel Oquendo-Cruz ,
Ana Vega-Avila  and
Oscar Perales-Pérez
Abdiel Oquendo-Cruz*
Affiliation:
Department of Chemistry, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR, USA.
Ana Vega-Avila
Affiliation:
Department of Chemistry, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR, USA.
Oscar Perales-Pérez
Affiliation:
Department of Engineering Sciences and Materials, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR, USA.
*
*(Email: abdiel.oquendo@upr.edu)
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Abstract

As the global populations grow, water demand and pollution of water resources will increase. As a consequence, water borne disease outbreaks are on the rise and current disinfection methods have been shown to be ineffective in inactivating all pathogens during water treatment. Aluminum oxide nanoparticles (Al2O3 NPs) have been shown to poses antimicrobial properties. Also, Al2O3 has high thermal and chemical stability, which makes these NPs an excellent candidate for water treatment applications. Thus, the objective of this work is to assess the bactericidal properties of Al2O3 NPs synthesized using a polyol-based process in presence of polyvinylpyrrolidone (PVP). For practical applications nanoparticles must be immobilized in a medium to ensure that particles are not dispersed into the treated water. For this reason, synthesized nanoparticles were dispersed in electrospun polyacrylonitrile (PAN) membranes to also evaluate the bacterial removal capacity. X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR) analysis suggests that synthesized nanoparticles are γ-Al2O3 after annealing at 800°C for 6 hours. Scanning Electron Microscopy (SEM) characterization was used to determine the morphology and size of synthesized nanoparticles. Composite electrospun membranes were also characterized by XRD, FT-IR, and SEM. The bactericide activity of the synthesized γ-Al2O3 NPs and commercially available Al2O3 particles was evaluated by the disc diffusion method against E. coli bacteria. Also, Al2O3-PAN composite electrospun membranes bacterial filtration capacity was tested. Both synthesized and industrially produced particles exhibited antibacterial activity against E. coli, but polyol-based synthesized nanoparticles demonstrated better bactericide properties. The bacterial removal capacity of PAN and PAN/Al2O3 fibers was comparable to that of paper filters.

Keywords

compositenanoscalewater
Type
Articles
Information
MRS Advances , Volume 2 , Issue 30: Nanomaterials , 2017 , pp. 1605 - 1610
Copyright
Copyright © Materials Research Society 2017 

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References

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