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

Journal of the Brazilian Chemical Society

Cristante, Valtair M.¹  Valente, José P. S.¹  Araujo, Adriana B.¹  Padilha, Pedro M.¹  Universidade Estadual Paulista, Botucatu, Brazil¹  Florentino, Ariovaldo O.¹  Jorge, Sônia M. A.¹  Universidade Estadual Paulista, Araraquara, Brazil¹ 

关键词: TiO2;    2-aminothiazole;    photocatalysis;    3-chloropropyltrimethoxysilane;   

DOI  :  10.1590/S0103-50532006000300004

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown