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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(08) [August 2011] >
| Title: | BaCrO4 assisted visible light induced advanced oxidation process for mineralizing Azur B |
| Authors: | Pare, Brijesh
Singh, Vijendra
Jonnalagadda, S B |
| Keywords: | Photochemistry
Photocatalysis
Degradation
Advanced oxidation process |
| Issue Date: | Aug-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The photocatalyst BaCrO4
has been utilized to photocatalytically degrade Azur B in presence of visible
light. 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, pH, light
intensity, dye concentration, oxidants such as H2O2 and K2S2O8,
electron acceptors like
NaCl and Na2CO3,
on the rate of photodegradation have been investigated. Both NaCl and Na2CO3 are found to retard the
rate of photocatalytic degradation, whereas increase in the
initial concentration of both H2O2 and K2S2O8, increases
the
degradation rate. The degradation efficiency was found to be
the substantially high at around neutral pH 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.
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| Page(s): | 1061-1065 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.50A(08) [August 2011]
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