Article (Scientific journals)
Visible-light photo-activity of alkali metal doped ZnO
Benhebal, Hadj; Chaib, Messaoud; Malengreaux, Charline et al.
2014In Journal of the Taiwan Institute of Chemical Engineers, 45 (1), p. 249-253
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Keywords :
Zinc oxide; Alkali metals; Sol-gel; Photocatalysis
Abstract :
[en] In order to utilize visible light more efficiently in the field of photocatalysis, Li, Na and K-doped ZnO nanoparticles were prepared using a sol–gel method. The obtained samples were characterized by BET surface area measurements, X-ray diffraction, scanning electron microscopy and UV–vis analysis. The photocatalytic activity of the photocatalysts was evaluated for the degradation of p-nitrophenol (p-NP) under visible light irradiation. It has been observed that these photocatalysts could be a promising photocatalyst for degradation of organic molecules as compared to transition metal doped ZnO under visible light. Li-doped ZnO is the most active photocatalyst and shows high photocatalytic activity for the degradation of p-nitrophenol (p-NP). The enhanced photocatalytic activity of Li-doped ZnO is mainly due to the electron trapping by lithium metal ions, small particle size, large surface area, and high surface roughness of the photocatalysts.
Disciplines :
Chemical engineering
Materials science & engineering
Chemistry
Author, co-author :
Benhebal, Hadj;  Université de Tiaret > Laboratoire de Chimie et Environnement
Chaib, Messaoud;  Université de Tiaret > Laboratoire de Chimie et Environnement
Malengreaux, Charline ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces
Lambert, Stéphanie  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Léonard, Angélique  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Crine, Michel ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires
Heinrichs, Benoît ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces
Language :
English
Title :
Visible-light photo-activity of alkali metal doped ZnO
Publication date :
2014
Journal title :
Journal of the Taiwan Institute of Chemical Engineers
ISSN :
1876-1070
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
45
Issue :
1
Pages :
249-253
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 July 2013

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