Enhanced photocatalytic reduction of Hg(II) in aqueous medium by 2-aminothiazole-modified TiO2 particles

• Autor(a) principal: Cristante, Valtair M. [UNESP]
• Data de Publicação: 2006
• Outros Autores: Araujo, Adriana B. [UNESP], Jorge, Sônia M. A. [UNESP], Florentino, Ariovaldo O. [UNESP], Valente, José P. S. [UNESP], Padilha, Pedro M. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0103-50532006000300004; http://hdl.handle.net/11449/68919
• topic: 2-aminothiazole; 3- chloropropyltrimethoxysilane; Photocatalysis; TiO2

This work describes the synthesis and characterization of 2-aminothiazole-modified titania and its application on Hg (II) photoreduction in aqueous medium. Infrared spectroscopy confirmed the chemical modification of the titania matrix. The number of 2-aminothiazole groups attached to the titania was determined by Kjeldahl's method. The photocatalytic experiments were carried out in a cylindrical photoreactor thermostatted at 298 K. The resulting modified photocatalyst 2-aminothiazole titania (TiAT) revealed an enhance in the Hg (II) photoreduction capacity at studied pH values (3, 7 and 9). In addition, sorption studies showed that the photocatalyst TiAT presented a lower equilibrium time and a higher sorption capacity of Hg(II) ion, demonstrating that sorption plays a fundamental role in the photoreduction mechanism. ©2006 Sociedade Brasileira de Química.