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Title: Composite nanofibers for highly efficient photocatalytic degradation of organic dyes from contaminated water

Abstract

In this study highly efficient photocatalyst based on composite nanofibers containing polyacrylonitrile (PAN), carbon nanotubes (CNT), and surface functionalized TiO{sub 2} nanoparticles was developed. The composite nanofibers were fabricated using electrospinning technique followed by chemical crosslinking. The surface modification and morphology changes of the fabricated composite nanofibers were examined through SEM, TEM, and FTIR analysis. The photocatalytic performance of the composite nanofibers for the degradation of model molecules, methylene blue and indigo carmine, under UV irradiation in aqueous solutions was investigated. The results demonstrated that high photodegradation efficiency was obtained in a short time and at low power intensity compared to other reported studies. The effective factors on the degradation of the dyes, such as the amount of catalyst, solution pH and irradiation time were investigated. The experimental kinetic data were fitted using pseudo-first order model. The effect of the composite nanofibers as individual components on the degradation efficiency of MB and IC was evaluated in order to understand the overall photodegradation mechanism. The results obtained showed that all the components possess significant effect on the photodegradation activity of the composite nanofibers. The stability studies demonstrated that the photodegradation efficiency can remain constant at the level of 99% after fivemore » consecutive cycles. - Highlights: • Develop effective photocatalyst based on PAN–CNT/TiO{sub 2}–NH{sub 2} composite nanofibers. • High photodegradation efficiency and fast kinetics was obtained. • Regeneration of the composite nanofibers allowed the reuse of these material. • Mechanism of the photocatalytic degradation was proposed. • The flexibility of the composite nanofibers allows use in a continuous operation mode.« less

Authors:
 [1];  [2];  [3]; ;  [1]
  1. Department of Materials and NanoPhysics, Royal Institute of Technology (KTH), 16440 Kista, Stockholm (Sweden)
  2. Experimental Cancer Medicine, KFC, Novum, Department of laboratory Medicine, Karolinska Institute, 14186 Stockholm (Sweden)
  3. Mechanical Design and Production Engineering Department, Cairo University, 12613 Giza (Egypt)
Publication Date:
OSTI Identifier:
22687722
Resource Type:
Journal Article
Journal Name:
Environmental Research
Additional Journal Information:
Journal Volume: 145; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0013-9351
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AQUEOUS SOLUTIONS; CARBON NANOTUBES; FOURIER TRANSFORMATION; INFRARED SPECTRA; IRRADIATION; METHYLENE BLUE; NANOFIBERS; ORGANIC POLYMERS; PHOTOCATALYSIS; SCANNING ELECTRON MICROSCOPY; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Mohamed, Alaa, Mechanical Design and Production Engineering Department, Cairo University, 12613 Giza, Production Engineering and Printing Technology Department, Akhbar El Yom Academy, 12655 Giza, El-Sayed, Ramy, Osman, T. A., Toprak, M. S., Muhammed, M., and Uheida, A., E-mail: salam@kth.se. Composite nanofibers for highly efficient photocatalytic degradation of organic dyes from contaminated water. United States: N. p., 2016. Web. doi:10.1016/J.ENVRES.2015.09.024.
Mohamed, Alaa, Mechanical Design and Production Engineering Department, Cairo University, 12613 Giza, Production Engineering and Printing Technology Department, Akhbar El Yom Academy, 12655 Giza, El-Sayed, Ramy, Osman, T. A., Toprak, M. S., Muhammed, M., & Uheida, A., E-mail: salam@kth.se. Composite nanofibers for highly efficient photocatalytic degradation of organic dyes from contaminated water. United States. https://doi.org/10.1016/J.ENVRES.2015.09.024
Mohamed, Alaa, Mechanical Design and Production Engineering Department, Cairo University, 12613 Giza, Production Engineering and Printing Technology Department, Akhbar El Yom Academy, 12655 Giza, El-Sayed, Ramy, Osman, T. A., Toprak, M. S., Muhammed, M., and Uheida, A., E-mail: salam@kth.se. Mon . "Composite nanofibers for highly efficient photocatalytic degradation of organic dyes from contaminated water". United States. https://doi.org/10.1016/J.ENVRES.2015.09.024.
@article{osti_22687722,
title = {Composite nanofibers for highly efficient photocatalytic degradation of organic dyes from contaminated water},
author = {Mohamed, Alaa and Mechanical Design and Production Engineering Department, Cairo University, 12613 Giza and Production Engineering and Printing Technology Department, Akhbar El Yom Academy, 12655 Giza and El-Sayed, Ramy and Osman, T. A. and Toprak, M. S. and Muhammed, M. and Uheida, A., E-mail: salam@kth.se},
abstractNote = {In this study highly efficient photocatalyst based on composite nanofibers containing polyacrylonitrile (PAN), carbon nanotubes (CNT), and surface functionalized TiO{sub 2} nanoparticles was developed. The composite nanofibers were fabricated using electrospinning technique followed by chemical crosslinking. The surface modification and morphology changes of the fabricated composite nanofibers were examined through SEM, TEM, and FTIR analysis. The photocatalytic performance of the composite nanofibers for the degradation of model molecules, methylene blue and indigo carmine, under UV irradiation in aqueous solutions was investigated. The results demonstrated that high photodegradation efficiency was obtained in a short time and at low power intensity compared to other reported studies. The effective factors on the degradation of the dyes, such as the amount of catalyst, solution pH and irradiation time were investigated. The experimental kinetic data were fitted using pseudo-first order model. The effect of the composite nanofibers as individual components on the degradation efficiency of MB and IC was evaluated in order to understand the overall photodegradation mechanism. The results obtained showed that all the components possess significant effect on the photodegradation activity of the composite nanofibers. The stability studies demonstrated that the photodegradation efficiency can remain constant at the level of 99% after five consecutive cycles. - Highlights: • Develop effective photocatalyst based on PAN–CNT/TiO{sub 2}–NH{sub 2} composite nanofibers. • High photodegradation efficiency and fast kinetics was obtained. • Regeneration of the composite nanofibers allowed the reuse of these material. • Mechanism of the photocatalytic degradation was proposed. • The flexibility of the composite nanofibers allows use in a continuous operation mode.},
doi = {10.1016/J.ENVRES.2015.09.024},
url = {https://www.osti.gov/biblio/22687722}, journal = {Environmental Research},
issn = {0013-9351},
number = ,
volume = 145,
place = {United States},
year = {2016},
month = {2}
}