Simultaneous copper ion removal and hydrogen production from water over a TiO2 nanotube photocatalyst.
Du, Alan J.
Sun, Darren Delai
Date of Issue2012
School of Civil and Environmental Engineering
A one-dimensioal (1-D) mesoporous TiO2 nanotube (TiNT) was successfully synthesized by hydrothermal-calcination process, and employed in simultaneous photocatalytic Cu2+ removal and H2 production. Under irradiation, Cu2+ in wide concentration range of 8-800 ppm, could be reduced rapidly, and the reduction was not severely impacted by co-existing inorganic ions in solution. Simultaneous with Cu2+ reduction, noticeable H2 was produced over the in-situ fabricated Cu incorporated TiNT (Cu-TiNT) photocatalyst, while H2 evolution rate was controlled by Cu2+ reduction process, due to competition of electrons between protons and Cu2+. In addition, H2 generation activity of Cu-TiNT depended on initial Cu2+/Ti ratio, and could be depressed by co-existing ions in solution. Fast Cu2+ reduction and remarkable H2 evolution confirmed the feasibility of simultaneous Cu2+ removal and H2 production over TiNT photocatalyst.
Water science and technology
© 2012 IWA Publishing This is the author created version of a work that has been peer reviewed and accepted for publication by Water science and technology, IWA Publishing. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.2166/wst.2012.881