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Nalbandian MJ, Zhang M, Sanchez J, et al. Synthesis and optimization of Ag-TiO2 composite nanofibers for photocatalytic treatment of impaired water sources. J Hazard Mater. 2015;299:141-8doi: 10.1016/j.jhazmat.2015.05.053.
Nalbandian, M. J., Zhang, M., Sanchez, J., Kim, S., Choa, Y. H., Cwiertny, D. M., & Myung, N. V. (2015). Synthesis and optimization of Ag-TiO2 composite nanofibers for photocatalytic treatment of impaired water sources. Journal of hazardous materials, 299141-8. https://doi.org/10.1016/j.jhazmat.2015.05.053
Nalbandian, Michael J, et al. "Synthesis and optimization of Ag-TiO2 composite nanofibers for photocatalytic treatment of impaired water sources." Journal of hazardous materials vol. 299 (2015): 141-8. doi: https://doi.org/10.1016/j.jhazmat.2015.05.053
Nalbandian MJ, Zhang M, Sanchez J, Kim S, Choa YH, Cwiertny DM, Myung NV. Synthesis and optimization of Ag-TiO2 composite nanofibers for photocatalytic treatment of impaired water sources. J Hazard Mater. 2015 Dec 15;299:141-8. doi: 10.1016/j.jhazmat.2015.05.053. Epub 2015 Jun 03. PMID: 26101968.
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J Hazard Mater. 2015 Dec 15;299:141-8. doi: 10.1016/j.jhazmat.2015.05.053. Epub 2015 Jun 03.

Synthesis and optimization of Ag-TiO2 composite nanofibers for photocatalytic treatment of impaired water sources.

Journal of hazardous materials

Michael J Nalbandian, Miluo Zhang, Joel Sanchez, Seil Kim, Yong-Ho Choa, David M Cwiertny, Nosang V Myung

Affiliations

  1. Department of Chemical and Environmental Engineering, University of California, Riverside, Riverside, CA 92521, USA.
  2. Department of Fusion Chemical Engineering, Hanyang University, Ansan, Kyeonggi-do 426-791, South Korea.
  3. Department of Civil and Environmental Engineering, University of Iowa, Iowa, IA 52242, USA. Electronic address: [email protected].
  4. Department of Chemical and Environmental Engineering, University of California, Riverside, Riverside, CA 92521, USA. Electronic address: [email protected].

PMID: 26101968 DOI: 10.1016/j.jhazmat.2015.05.053

Abstract

In this work, Ag-TiO2 composite nanofibers were fabricated by electrospinning, where the composition and crystallinity were tuned by controlling the precursor composition and annealing conditions. Characterization revealed that bulk-embedded Ag nanoparticles inhibited anatase-to-rutile phase transformation and a decrease in band gap from 3.2 down to 2.8 eV with increase in the Ag content. The photocatalytic activity of 0.5 at.% Ag-TiO2 nanofibers toward phenol degradation was the greatest, outperforming both unmodified TiO2 nanofibers and commercially available TiO2 Aeroxide(®) P25 by a factor of ∼3. The high reactivity of the low content Ag-TiO2 nanofibers can be attributed to the addition of electron traps, which provide efficient carrier separation and, therefore, decreased recombination. However, further increase in Ag content led to lower photoreactivity, most likely due to the growth of the Ag nanoparticles, which suggests an optimal size of 2 to 3 nm for the Ag nanoparticles at 0.5 at.% provided the greatest photoreactivity. Ag-TiO2 nanofibers show great promise as innovative and highly performing nanomaterials for future nanotechnology-based treatment systems, particularly when the photoreactivity demonstrate herein is used in synergy with the established antimicrobial activity of nano-Ag.

Copyright © 2015 Elsevier B.V. All rights reserved.

Keywords: Advanced oxidation processes (AOPs); Electrospinning; Nanoparticle synthesis; Nanotechnology; Photocatalysis; Water and wastewater treatment

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