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Applied Nanoscience

, Volume 8, Issue 5, pp 1179–1188 | Cite as

CNT supported Mn-doped ZnO nanoparticles: simple synthesis and improved photocatalytic activity for degradation of malachite green dye under visible light

  • R. M. Mohamed
  • Ahmed Shawky
Original Article
  • 21 Downloads

Abstract

Hexagonal ZnO nanoparticles doped with Mn and supported with a minor amount of carbon nanotubes (CNTs) were synthesized through a simple coprecipitation-ultrasonication process with high yield. The effect of Mn doping, as well as CNTs addition on structure, surface morphology and texture, optical and electronic properties, was studied. We found that just 1% Mn doping and 1% CNT addition on ZnO showed the best crystallinity, highest surface area, improved visible light absorption, and a lowest estimated band gap of 2.6 eV with minimum charge recombination as revealed from photoluminescence spectra. The application of the optimum composition of the synthesized sample for the photodegradation of malachite green dye showed enhanced photocatalytic activity > 95% under visible light irradiation within 120 min at a minimum dosage of 0.1 g L−1 without any using of hole scavenger or changing the pH. This work highlighting the humble preparation procedure and develops photocatalysis research for real industrial applications.

Keywords

Zinc oxide Carbon nanotubes Synthesis Photocatalyst Photodegradation Malachite green 

Notes

Acknowledgements

This project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under Grant no. (G-114-130-38). The authors, therefore, acknowledge with thanks DSR for technical and financial support.

Compliance with ethical standards

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

Supplementary material

13204_2018_742_MOESM1_ESM.docx (4.3 mb)
Supplementary material 1 (DOCX 4380 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Chemistry Department, Faculty of ScienceKing Abdulaziz UniversityJeddahSaudi Arabia
  2. 2.Advanced Materials Division, Nanomaterials and Nanotechnology DepartmentCentral Metallurgical R&D Institute (CMRDI)CairoEgypt

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