Article
Photocatalytic activity and reusability of ZnO layer synthesised by electrolysis, hydrogen peroxide and heat treatment
Environmental Technology
(2016)
Abstract
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helvetica}
In this study, the zinc oxide (ZnO) layer was synthesised on the surface of Zn plates by three
different techniques, i.e. electrolysis, hydrogen peroxide and heat treatment. The synthesised
ZnO layers were characterised using scanning electron microscopy, X-ray diffraction, UV–visible
diffuse reflectance and photoluminescence spectroscopy. The photocatalytic activity of the ZnO
layer was further assessed against methylene blue (MB) degradation under UV irradiation. The
photocatalytic degradation of MB was achieved up to 84%, 79% and 65% within 1 h for ZnO
layers synthesised by electrolysis, heat and hydrogen peroxide treatment, respectively. The
reusability results show that electrolysis and heat-treated ZnO layers have considerable
photocatalytic stability. Furthermore, the results confirmed that the photocatalytic efficiency of
ZnO was directly associated with the thickness and enlarged surface area of the layer. Finally,
this study proved that the ZnO layers synthesised by electrolysis and heat treatment had shown
better operational stability and reusability.
Keywords
- Advanced oxidation,
- processes; electrolysis,
- heat treatment,
- hydrogen peroxide treatment,
- photocatalysis,
- zinc oxide
Disciplines
Publication Date
2016
DOI
10.1080/09593330.2015.1135989
Citation Information
Syaiful Akhmal Saadon, Palanivel Sathishkumar, Abdull Rahim Mohd Yusoff, Mohd Dzul Hakim Wirzal, et al.. "Photocatalytic activity and reusability of ZnO layer synthesised by electrolysis, hydrogen peroxide and heat treatment" Environmental Technology Vol. 37 Iss. 15 (2016) p. 1875 - 1882 Available at: http://works.bepress.com/hadi_nur/97/