Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13234
Title: Photocatalytic degradation of an .Odorous pollutant : 2-mercaptobenzothiazole in aqueous suspension using Nd3+-TiO 2 catalysts
Authors: Li, FB
Li, XZ
Ng, KH
Issue Date: 2006
Publisher: American Chemical Society
Source: Industrial and engineering chemistry research, 2006, v. 45, no. 1, p. 1-7 How to cite?
Journal: Industrial and engineering chemistry research 
Abstract: Photocatalytic degradation of an odorous chemical, 2-mercaptobenzothiazole (MBT), in aqueous suspension was investigated using pure TiO2 and neodymium ion doped TiO2 (Nd3+-TiO2) catalysts. The photocatalytic activity of Nd3+-TiO2 was evaluated in the photocatalytic degradation of MBT in aqueous solution. The experimental results showed that the overall kinetic constant (k) of MBT degradation using Nd3+-TiO2 was significantly higher than that using TiO2 and an optimal content of neodymium ion doping was found to be 1.2% (molar ratio). The main intermediates during the MBT degradation were identified by LC/MS-MS, and the final products including sulfate ion, ammonium ion, and nitrate ion were also determined by ion chromatography. Only three main intermediates including benzothiazolë, 2-hydroxybenzothiazole, and benzothiazole-2-sulfite were found during the MBT degradation using the TiO 2 catalyst, while five main intermediates including benzothiazole, 2-hydroxybenzothiazole, benzothiazole-2-sulfonate, benzothiazole-2-sulfite, and anilinesulfonic acid were found during the MBT degradation using 1.2% Nd 3+-TiO2. On the basis of analytical results, a possible pathway of MBT degradation in such a photocatalytic oxidation reaction was proposed and illustrated. It was concluded that the photodegradation of MBT and its intermediates can be enhanced owing to the neodymium ion doping.
URI: http://hdl.handle.net/10397/13234
ISSN: 0888-5885
EISSN: 1520-5045
DOI: 10.1021/ie050139o
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