Visible-light photo-activity of alkali metal doped ZnO

[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 :

Issue :

Pages :

249-253

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 02 July 2013

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