کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
177618 458991 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
TiO2-mediated photocatalytic degradation of a textile dye derivative, bromothymol blue, in aqueous suspensions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
TiO2-mediated photocatalytic degradation of a textile dye derivative, bromothymol blue, in aqueous suspensions
چکیده انگلیسی

Photocatalysed degradation of a textile dye derivative, bromothymol blue, has been investigated in aqueous suspensions of titanium dioxide under a variety of conditions. The degradation was monitored by measuring the change in substrate concentration as a function of irradiation time employing UV spectroscopic analysis technique. In these studies, a number of byproducts are formed during the photooxidation process, which can potentially be harmful to the environment, therefore, we have studied the mineralization of the pollutant by measuring the total organic carbon (TOC) as a function of irradiation time. The degradation kinetics were studied under different conditions such as pH, catalyst concentration, substrate concentration, different types of TiO2 and in the presence of electron acceptors such as hydrogen peroxide (H2O2), potassium bromate (KBrO3) and ammonium persulphate (NH4)2S2O8 besides molecular oxygen. The degradation rates were found to be strongly influenced by all the above parameters. The photocatalyst, titanium dioxide (TiO2) Degussa P25, was found to be more efficient as compared with other TiO2 powders. All the electron acceptors markedly enhanced the degradation of the pollutant under investigation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 75, Issue 2, 2007, Pages 443–448
نویسندگان
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