Mn2O3/TiO2 nanofibers with broad-spectrum antibiotics effect and photocatalytic activity for preliminary stage of water desalination |
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| Authors: | Gopal Panthi Ayman Yousef Nasser AM Barakat Khalil Abdelrazek Khalil Shahina Akhter Yu Ri Choi Hak Yong Kim |
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| Affiliation: | 1. Bionano Systems Engineering Department, Chonbuk National University, Jeonju 561-756, Republic of Korea;2. Faculty of Engineering, Matteria, Helwan University, Cairo, Egypt;3. Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia, Egypt;4. Department of Organic Materials and Fiber Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea;5. Mechanical Engineering Department (NPST), King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;6. Department of Microbiology and Genetics and Institute for Medical Science, Chonbuk National University, Jeonju 561-712, South Korea |
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| Abstract: | Composite nanofibers consisting of Mn2O3 and TiO2 were prepared by the electrospinning process, and tested as Gram-class-independent antibacterial agent and photocatalyst for organic pollutants degradation. Initially, electrospinning of a sol–gel consisting of titanium isopropoxide, manganese acetate tetrahydrate and poly(vinyl pyrrolidone) was used to produce hybrid polymeric nanofibers. Calcination of the obtained nanofibers in air at 650 °C led to produce good morphology Mn2O3/TiO2 nanofibers. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to characterize the as-spun nanofibers and the calcined product. X-ray powder diffractometry (XRD) analysis was also used to characterize the chemical composition and the crystallographic structure of the sintered nanofibers. The antibacterial activity of Mn2O3/TiO2 nanofibers against Gram negative and Gram positive bacteria was investigated by calculating the minimum inhibitory concentration after treatment with the nanofibers. Investigations revealed that the lowest concentration of Mn2O3/TiO2 nanofibers solution inhibiting the growth of Staphylococcus aureus ATCC 29231 and Escherichia coli ATCC 52922 strains is 0.4 and 0.8 μg/ml, respectively. Incorporation of Mn2O3 significantly improved the photodegradation of methylene blue (MB) dye under the visible light irradiation due to enhancing rutile phase formation in the TiO2 nanofibers matrix. |
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| Keywords: | Mn2O3/TiO2 nano?bers Electrospinning Photocatalytic activity Broad-spectrum antibiotics |
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