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RESEARCH ARTICLE
Contents Vol 63(2)

The Effect of Ionic Charge on the Adsorption of Organic Dyes onto Titanate Nanotubes

Dmitry V. Bavykin A B , Katherine E. Redmond A , Benjamin P. Nias A , Alexander N. Kulak A and Frank C. Walsh A
+ Author Affiliations
- Author Affiliations

A Electrochemical Engineering Laboratory, Energy Technology Research Group, School of Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK.

B Corresponding author. Email: D.Bavykin@soton.ac.uk

Australian Journal of Chemistry 63(2) 270-275 https://doi.org/10.1071/CH09326
Submitted: 10 June 2009  Accepted: 19 August 2009   Published: 26 February 2010

Abstract

The adsorption of dye molecules from aqueous solution onto the surface of titanate nanotubes (which have been synthesized via an alkaline hydrothermal treatment) has been studied. The ionic charge on the dye molecules was found to affect their ability to adsorb onto the titanate nanotube surface. In the case of (cationic) methylene blue, the adsorption was preferable on the negatively charged surface of titanate nanotubes rather than on positively charged P25 TiO2 nanoparticles. In the case of (anionic) Eriochrome Black T dye, the opposite trend was found. Herein, the dynamics of dye adsorption and the effect of pH on the adsorption capacity are considered.


Acknowledgement

The authors gratefully acknowledge financial support from the EPSRC, UK (grant EP/F044445/1, ‘A hydrothermal route to metal oxide nanotubes: synthesis and energy conversion application’).


References


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