Photocatalytic degradation of bromothylmol blue by novel ruthenium(II) complex

Author

Siew San, Tan ; Kim Hang Ng ; Wun Fui, Mark-Lee ; Minggu, Lorna Jeffery ; Kassim, Mohammad B.

Author_Institution

Sch. of Chem. Sci. & Food Technol., Univ. Kebangsaan Malaysia, Bangi, Malaysia

fYear

2014

Firstpage

1

Lastpage

5

Abstract

A photocatalytic degradation of bromothymol blue (BTB) by a ruthenium(II) complex at basic buffer of 12 has been investigated. A novel ruthenium(II) complex, [Ru (bpy)₂(Phen-pBrBT)](PF₆)₂, where bpy = 2,2´-bipyridine, (Phen-pBrBT) = N-(p-bromobenzoyl)-N´-(1,10-phenanthrolin-5-yl)thiourea was synthesized and characterized by spectroscopic techniques namely infrared, ultraviolet-visible (UV-Vis) and nuclear magnetic resonance. The photocatalytic performance of the ruthenium(II) complex was studied in two different concentrations of bromothymol blue (2.5 × 10^-5 and 10.0 × 10^-5 M). Upon exposure to light source, the optical absorption of bromothymol blue decreased gradually with time in the presence of [Ru(bpy)₂(Phen-pBrBT)](PF₆)₂. The second order kinetic model of bromothymol blue photodegradation at pH=12.00 was established. The rate of photodegradation was found to be directly proportional to the concentration of bromothymol blue in aqueous solution.

Keywords

NMR spectroscopy; absorption; infrared spectroscopy; pH; ultraviolet spectroscopy; wastewater treatment; BTB; UV-Vis; aqueous solution; bromothylmol blue; bromothymol blue photodegradation; infrared spectroscopic techniques; nuclear magnetic resonance spectroscopic techniques; optical absorption; pH; ruthenium(II) complex; second order kinetic model; ultraviolet-visible spectroscopic techniques; bromothymol-blue; phenanthroline; photocatalyst; pyridine; ruthenium;

fLanguage

English

Publisher

iet

Conference_Titel

Clean Energy and Technology (CEAT) 2014, 3rd IET International Conference on

Print_ISBN

978-1-78561-069-1

Type

conf

DOI

10.1049/cp.2014.1460

Filename

7151622