Highly efficient degradation of dyes by carbon quantum dots/N-doped zinc oxide (CQD/N-ZnO) photocatalyst and its compatibility on three different commercial dyes under daylight

S. Muthulingam, In-Hwan Lee, Periyayya Uthirakumar

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Eco-friendly carbon quantum dots/nitrogen-doped ZnO (CQD/N-ZnO) composites were successfully prepared by a facile one-step method. The various techniques were employed to characterize the phase structure, morphology and optical properties of CQD/N-ZnO composites. The nitrogen doping was confirmed by Raman and X-ray photoelectron spectroscopy. Three commercial dyes, such as malachite green, methylene blue and fluorescein dyes were chosen to investigate the photocatalytic performance of CQD/N-ZnO under daylight irradiation. It was found that the CQD/N-ZnO photocatalyst established a high compatibility to degrade all three commercial dyes within 30-45. min, under daylight irradiation. Also, it remains capable of reusing the CQD/N-ZnO photocatalyst for repeated photocatalytic performance due to anti-photocorrosion offered by CQDs. The synergetic effect of N-doping and CQDs is key to design a new class of photocatalyst for environmental remediation under naturally available daylight source.

Original languageEnglish
Pages (from-to)101-109
Number of pages9
JournalJournal of Colloid and Interface Science
Volume455
DOIs
Publication statusPublished - 2015 Oct 1
Externally publishedYes

Fingerprint

Zinc Oxide
Photocatalysts
Zinc oxide
Semiconductor quantum dots
Coloring Agents
Carbon
Dyes
Degradation
Nitrogen
Doping (additives)
Irradiation
Methylene Blue
Composite materials
Phase structure
Fluorescein
X ray photoelectron spectroscopy
Optical properties

Keywords

  • Carbon quantum dots
  • Daylight
  • Degradation
  • Dyes
  • Photocatalyst
  • Zinc oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Cite this

@article{8857ff8bddcd45eab5e6f7f21db955f9,
title = "Highly efficient degradation of dyes by carbon quantum dots/N-doped zinc oxide (CQD/N-ZnO) photocatalyst and its compatibility on three different commercial dyes under daylight",
abstract = "Eco-friendly carbon quantum dots/nitrogen-doped ZnO (CQD/N-ZnO) composites were successfully prepared by a facile one-step method. The various techniques were employed to characterize the phase structure, morphology and optical properties of CQD/N-ZnO composites. The nitrogen doping was confirmed by Raman and X-ray photoelectron spectroscopy. Three commercial dyes, such as malachite green, methylene blue and fluorescein dyes were chosen to investigate the photocatalytic performance of CQD/N-ZnO under daylight irradiation. It was found that the CQD/N-ZnO photocatalyst established a high compatibility to degrade all three commercial dyes within 30-45. min, under daylight irradiation. Also, it remains capable of reusing the CQD/N-ZnO photocatalyst for repeated photocatalytic performance due to anti-photocorrosion offered by CQDs. The synergetic effect of N-doping and CQDs is key to design a new class of photocatalyst for environmental remediation under naturally available daylight source.",
keywords = "Carbon quantum dots, Daylight, Degradation, Dyes, Photocatalyst, Zinc oxide",
author = "S. Muthulingam and In-Hwan Lee and Periyayya Uthirakumar",
year = "2015",
month = "10",
day = "1",
doi = "10.1016/j.jcis.2015.05.046",
language = "English",
volume = "455",
pages = "101--109",
journal = "Journal of Colloid and Interface Science",
issn = "0021-9797",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Highly efficient degradation of dyes by carbon quantum dots/N-doped zinc oxide (CQD/N-ZnO) photocatalyst and its compatibility on three different commercial dyes under daylight

AU - Muthulingam, S.

AU - Lee, In-Hwan

AU - Uthirakumar, Periyayya

PY - 2015/10/1

Y1 - 2015/10/1

N2 - Eco-friendly carbon quantum dots/nitrogen-doped ZnO (CQD/N-ZnO) composites were successfully prepared by a facile one-step method. The various techniques were employed to characterize the phase structure, morphology and optical properties of CQD/N-ZnO composites. The nitrogen doping was confirmed by Raman and X-ray photoelectron spectroscopy. Three commercial dyes, such as malachite green, methylene blue and fluorescein dyes were chosen to investigate the photocatalytic performance of CQD/N-ZnO under daylight irradiation. It was found that the CQD/N-ZnO photocatalyst established a high compatibility to degrade all three commercial dyes within 30-45. min, under daylight irradiation. Also, it remains capable of reusing the CQD/N-ZnO photocatalyst for repeated photocatalytic performance due to anti-photocorrosion offered by CQDs. The synergetic effect of N-doping and CQDs is key to design a new class of photocatalyst for environmental remediation under naturally available daylight source.

AB - Eco-friendly carbon quantum dots/nitrogen-doped ZnO (CQD/N-ZnO) composites were successfully prepared by a facile one-step method. The various techniques were employed to characterize the phase structure, morphology and optical properties of CQD/N-ZnO composites. The nitrogen doping was confirmed by Raman and X-ray photoelectron spectroscopy. Three commercial dyes, such as malachite green, methylene blue and fluorescein dyes were chosen to investigate the photocatalytic performance of CQD/N-ZnO under daylight irradiation. It was found that the CQD/N-ZnO photocatalyst established a high compatibility to degrade all three commercial dyes within 30-45. min, under daylight irradiation. Also, it remains capable of reusing the CQD/N-ZnO photocatalyst for repeated photocatalytic performance due to anti-photocorrosion offered by CQDs. The synergetic effect of N-doping and CQDs is key to design a new class of photocatalyst for environmental remediation under naturally available daylight source.

KW - Carbon quantum dots

KW - Daylight

KW - Degradation

KW - Dyes

KW - Photocatalyst

KW - Zinc oxide

UR - http://www.scopus.com/inward/record.url?scp=84930636937&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84930636937&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2015.05.046

DO - 10.1016/j.jcis.2015.05.046

M3 - Article

AN - SCOPUS:84930636937

VL - 455

SP - 101

EP - 109

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

SN - 0021-9797

ER -