Synthesis, characterization and photocatalytic activity of annealingdependent quasi spherical and capsule like ZnO nanostructures

Manoj Pudukudy, Ain Hetieqa, Zahira Yaakob

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Quasi spherical and capsule like ZnO nanostructures have been successfully synthesized via a simple pre-cipitation route without the assistance of external capping agents. The effect of annealing temperatureon the properties of ZnO was investigated. In all cases, hexagonal wurtzite crystalline structure of phasepure ZnO was obtained. The crystallinity was found to be gradually increasing with annealing temper-ature. At low annealing temperatures, more or less spherical ZnO nanoparticles were clearly observed,whereas they tend to grow as nanocapsules with increasing the annealing temperature. The formationof single crystalline nanocapsules was observed at 600°C. The photoluminescence spectra indicated theannealing dependent emission features, especially in the spectral intensity. The dye pollutant methyleneblue was found to be completely degraded under UV light irradiation over the ZnO nano photocatalysts.The highest photoactivity was shown by nanocapsules obtained at 600°C and was found to be highlyreusable.

Original languageEnglish
Pages (from-to)221-229
Number of pages9
JournalApplied Surface Science
Volume319
Issue number1
DOIs
Publication statusPublished - 2014

Fingerprint

Nanocapsules
Capsules
Nanostructures
Annealing
Crystalline materials
Photocatalysts
Ultraviolet radiation
Photoluminescence
Coloring Agents
Dyes
Irradiation
Nanoparticles
Temperature

Keywords

  • Annealing temperature
  • Crystallinity
  • Hydroxyl radicalsa
  • Optical studies
  • Photocatalysis
  • ZnO nanoparticles

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Synthesis, characterization and photocatalytic activity of annealingdependent quasi spherical and capsule like ZnO nanostructures. / Pudukudy, Manoj; Hetieqa, Ain; Yaakob, Zahira.

In: Applied Surface Science, Vol. 319, No. 1, 2014, p. 221-229.

Research output: Contribution to journalArticle

@article{ac86d7037d4c4c2f9061db14461ce4bb,
title = "Synthesis, characterization and photocatalytic activity of annealingdependent quasi spherical and capsule like ZnO nanostructures",
abstract = "Quasi spherical and capsule like ZnO nanostructures have been successfully synthesized via a simple pre-cipitation route without the assistance of external capping agents. The effect of annealing temperatureon the properties of ZnO was investigated. In all cases, hexagonal wurtzite crystalline structure of phasepure ZnO was obtained. The crystallinity was found to be gradually increasing with annealing temper-ature. At low annealing temperatures, more or less spherical ZnO nanoparticles were clearly observed,whereas they tend to grow as nanocapsules with increasing the annealing temperature. The formationof single crystalline nanocapsules was observed at 600°C. The photoluminescence spectra indicated theannealing dependent emission features, especially in the spectral intensity. The dye pollutant methyleneblue was found to be completely degraded under UV light irradiation over the ZnO nano photocatalysts.The highest photoactivity was shown by nanocapsules obtained at 600°C and was found to be highlyreusable.",
keywords = "Annealing temperature, Crystallinity, Hydroxyl radicalsa, Optical studies, Photocatalysis, ZnO nanoparticles",
author = "Manoj Pudukudy and Ain Hetieqa and Zahira Yaakob",
year = "2014",
doi = "10.1016/j.apsusc.2014.07.050",
language = "English",
volume = "319",
pages = "221--229",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Synthesis, characterization and photocatalytic activity of annealingdependent quasi spherical and capsule like ZnO nanostructures

AU - Pudukudy, Manoj

AU - Hetieqa, Ain

AU - Yaakob, Zahira

PY - 2014

Y1 - 2014

N2 - Quasi spherical and capsule like ZnO nanostructures have been successfully synthesized via a simple pre-cipitation route without the assistance of external capping agents. The effect of annealing temperatureon the properties of ZnO was investigated. In all cases, hexagonal wurtzite crystalline structure of phasepure ZnO was obtained. The crystallinity was found to be gradually increasing with annealing temper-ature. At low annealing temperatures, more or less spherical ZnO nanoparticles were clearly observed,whereas they tend to grow as nanocapsules with increasing the annealing temperature. The formationof single crystalline nanocapsules was observed at 600°C. The photoluminescence spectra indicated theannealing dependent emission features, especially in the spectral intensity. The dye pollutant methyleneblue was found to be completely degraded under UV light irradiation over the ZnO nano photocatalysts.The highest photoactivity was shown by nanocapsules obtained at 600°C and was found to be highlyreusable.

AB - Quasi spherical and capsule like ZnO nanostructures have been successfully synthesized via a simple pre-cipitation route without the assistance of external capping agents. The effect of annealing temperatureon the properties of ZnO was investigated. In all cases, hexagonal wurtzite crystalline structure of phasepure ZnO was obtained. The crystallinity was found to be gradually increasing with annealing temper-ature. At low annealing temperatures, more or less spherical ZnO nanoparticles were clearly observed,whereas they tend to grow as nanocapsules with increasing the annealing temperature. The formationof single crystalline nanocapsules was observed at 600°C. The photoluminescence spectra indicated theannealing dependent emission features, especially in the spectral intensity. The dye pollutant methyleneblue was found to be completely degraded under UV light irradiation over the ZnO nano photocatalysts.The highest photoactivity was shown by nanocapsules obtained at 600°C and was found to be highlyreusable.

KW - Annealing temperature

KW - Crystallinity

KW - Hydroxyl radicalsa

KW - Optical studies

KW - Photocatalysis

KW - ZnO nanoparticles

UR - http://www.scopus.com/inward/record.url?scp=84922956867&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84922956867&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2014.07.050

DO - 10.1016/j.apsusc.2014.07.050

M3 - Article

VL - 319

SP - 221

EP - 229

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

IS - 1

ER -