Published September 15, 2015 | Version v1
Journal article Metadata-only

Photocatalytic degradation mechanisms of CeO2/Tb2O3 nanotubes

Creators

  • 1. Department of Chemical and Biochemical Engineering, Dongguk University-Seoul, 100715 (Korea, Republic of)
  • 2. Department of Nanoscience and Technology, Bharathiar University, Coimbatore-641 046 (India)
  • 3. Department of Electronic Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791 (Korea, Republic of)

Description

Highlights: • CeO2/Tb2O3 nanotubes have been synthesized using the surfactant free co-precipitation method. • HRTEM images, XPS spectra, and EDAX profiles showed that the as-synthesized samples were CeO2/Tb2O3 nanotubes. • Photocatalytic activity of the synthesized catalysts was evaluated by degrading Methylene blue under visible light irradiation. • Estimated rate constants for the CeO2 nanoparticles and the CeO2/Tb2O3 nanotubes were 0.0134 and 0.0317 min−1, respectively. • Photodegradation efficiency of CeO2/Tb2O3 nanotubes was 93% after 75 min. - Abstract: CeO2/Tb2O3 nanotubes (NTs) have been synthesized using the surfactant free co-precipitation method. High resolution transmission electron microscopy (HRTEM) images, X-ray spectroscopy (XPS) spectra, and energy dispersive X-ray (EDAX) profiles showed that the as-synthesized samples were CeO2/Tb2O3 NTs. The photocatalytic activity of the synthesized catalysts was evaluated by degrading Methylene blue (MB) under visible light irradiation. The fitting of the absorbance maximum as a function of time showed that the photodegradation of the MB followed pseudo-first-order reaction kinetics. The estimated rate constants for the CeO2 NPs and the CeO2/Tb2O3 NTs were found to be 0.0134 and 0.0317 min−1, respectively. The photodegradation efficiency of CeO2/Tb2O3 nanotubes was 93% after 75 min, which was found to be higher than those of CeO2 NPs (66%)

Availability note (English)

Available from http://dx.doi.org/10.1016/j.apsusc.2015.04.206

Additional details

Identifiers

DOI
10.1016/j.apsusc.2015.04.206;
PII
S0169-4332(15)01072-7;

Publishing Information

Journal Title
Applied Surface Science
Journal Volume
349
Journal Page Range
p. 459-464
ISSN
0169-4332
CODEN
ASUSEE

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
47038075
Subject category
S77: NANOSCIENCE AND NANOTECHNOLOGY;
Descriptors DEI
CATALYSTS; CERIUM OXIDES; COPRECIPITATION; EFFICIENCY; IRRADIATION; METHYLENE BLUE; NANOPARTICLES; NANOTUBES; PHOTOCATALYSIS; SPECTRA; SURFACTANTS; TERBIUM OXIDES; TIME DEPENDENCE; TRANSMISSION ELECTRON MICROSCOPY; VISIBLE RADIATION; X-RAY PHOTOELECTRON SPECTROSCOPY; X-RAY SPECTROSCOPY
Descriptors DEC
AMINES; ANTI-INFECTIVE AGENTS; ANTIMICROBIAL AGENTS; AZINES; CATALYSIS; CERIUM COMPOUNDS; CHALCOGENIDES; CHLORIDES; CHLORINE COMPOUNDS; DRUGS; ELECTROMAGNETIC RADIATION; ELECTRON MICROSCOPY; ELECTRON SPECTROSCOPY; HALIDES; HALOGEN COMPOUNDS; HETEROCYCLIC COMPOUNDS; MICROSCOPY; NANOSTRUCTURES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC SULFUR COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PARTICLES; PHENOTHIAZINES; PHOTOELECTRON SPECTROSCOPY; PRECIPITATION; RADIATIONS; RARE EARTH COMPOUNDS; SEPARATION PROCESSES; SPECTROSCOPY; TERBIUM COMPOUNDS

Optional Information

Copyright
Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.