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Title: BaCrO<sub>4</sub> assisted visible light induced advanced oxidation process for mineralizing Azur B
Authors: Pare, Brijesh
Singh, Vijendra
Jonnalagadda, S B
Keywords: Photochemistry
Advanced oxidation process
Issue Date: Aug-2011
Publisher: NISCAIR-CSIR, India
Abstract: The photocatalyst BaCrO<sub>4</sub> has been utilized to photocatalytically degrade Azur B in presence of visible light. <span style="color: rgb(39, 36, 37);" lang="EN-GB">The disappearance of the dye has been monitored spectrophotometrically, followed pseudo-first order kinetics, according to the Langmuir–Hinshelwood model. The total degradation of dye was tested by determining the chemical oxygen demand. To optimize the reaction condition, the effects of various parameters like amount of semiconductor, <i style="">p</i>H, light intensity, dye concentration, oxidants such as H<sub>2</sub>O<sub>2</sub> and K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>, electron acceptors like NaCl and Na<sub>2</sub>CO<sub>3</sub>, on the rate of photodegradation have been investigated. Both NaCl and Na<sub>2</sub>CO<sub>3</sub><span style="color: rgb(39, 36, 37);" lang="EN-GB"> are found to retard the rate of photocatalytic degradation, whereas increase in the initial concentration of both H<sub>2</sub>O<sub>2</sub> and K<sub>2</sub>S<sub>2</sub>O<sub>8, </sub>increases the degradation rate. The degradation efficiency was found to be the substantially high at around neutral <i style="">p</i>H values. The complete degradation of the dye has been confirmed using UV spectrum analysis. A pertinent mechanism for the photocatalytic degradation has also been proposed. </span></span>
Description: 1061-1065
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.50A(08) [August 2011]

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