Photocatalytic activity of ZnO impregnated H beta and mechanical mix of ZnO/H beta in the degradation of monocrotophos in aqueous solution

Anandan, S., Vinu, A., Venkatachalam, N., Arabindoo, B. and Murugesan, V. (2006) Photocatalytic activity of ZnO impregnated H beta and mechanical mix of ZnO/H beta in the degradation of monocrotophos in aqueous solution. Journal of Molecular Catalysis A-Chemical, 256 1-2: 312-320. doi:10.1016/j.molcata.2006.05.012


Author Anandan, S.
Vinu, A.
Venkatachalam, N.
Arabindoo, B.
Murugesan, V.
Title Photocatalytic activity of ZnO impregnated H beta and mechanical mix of ZnO/H beta in the degradation of monocrotophos in aqueous solution
Journal name Journal of Molecular Catalysis A-Chemical   Check publisher's open access policy
ISSN 1381-1169
1873-314X
Publication date 2006-08-01
Sub-type Article (original research)
DOI 10.1016/j.molcata.2006.05.012
Volume 256
Issue 1-2
Start page 312
End page 320
Total pages 9
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2006
Language eng
Formatted abstract
Adsorption experiments were carried out with monocrotophos (MCP) over supports (Hβ, HY and HZSM-5), ZnO, supported ZnO (ZnO/Hβ(I), ZnO/Hβ(M), ZnO/HY(I), ZnO/HZSM-5(I)) and TiO 2/Hβ. The results revealed that Hβ has better adsorption than HY and HZSM-5. Among the supported catalysts, ZnO/Hβ(I) showed higher percentage of adsorption than others. A series of supported catalysts (impregnation and mechanical mix) were prepared with different ZnO loadings and characterised by X-ray diffraction (XRD), SEM and BET surface area analysis. The photocatalytic degradation of monocrotophos in aqueous solution was carried out by using ZnO, supports and supported ZnO with low pressure mercury lamps. The influence of various parameters such as initial concentration of MCP, pH, catalyst loading and light intensity on the degradation was optimised. It was found that degradation of MCP followed first order kinetics. The experimental results demonstrated that the presence of zeolite in ZnO could enhance adsorption as well as degradation of MCP in aqueous suspension. The optimum loading for impregnated catalysts is 5 wt% whereas 1 wt% for mechanical mix catalyst. The time required for complete mineralisation of MCP under optimal experimental conditions over ZnO, 1 wt% ZnO/Hβ(M) and 5 wt% ZnO/Hβ(I) was 600, 360 and 240 min, respectively. The higher activity of ZnO/Hβ(I) is mainly due to fine dispersion of ZnO and hydrophobicity of the support.
Keyword Monocrotophos
Supported ZnO
Relative photonic efficiency
Photocatalytic mineralisation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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