Page - 85 - in Advanced Chemical Kinetics
Image of the Page - 85 -
Text of the Page - 85 -
converted in tomore stable, harmless inorganic species such as carbon dioxide, water and
mineral salts. AOPs are categorized as ozonation (O3), H2O2, O3/H2O2/photocatalysis, and
O3/H2O2/UV photocatalysis [39, 40]. TiO2 photocatalysis is considered as more auspicious
andefficient techniqueamongsemiconductorphotocatalysis [41, 42].TiO2photoactivemate-
rialhas shownagreatpotential inmanyapplications, includingwater splitting togenerateO2
andH2 [43, 44]water andwastewater treatment [45, 46], gasphase treatment [47, 48], aswell
as in solar cells [49]. So, in this case the degradation of BZFwas performed byVUVphoto
activematerialwithexposed {001} facetedTiO2/Timaterial.
Formeasurement of absolute bimolecular rate constant of•OHwithBZF,para-chlorobenzoic
acid (p-CBA) was used as probe molecule was calculated using para-chlorobenzoic acid
(p-CBA) as probemolecule and by employing competition kinetics technique established by
Pereiraetal. [50]andgiven inEq. (15).
k•OH sð
Ăž ÂĽ ks
UV=H2O2ð Þ�ks UVð Þ
kref UV=H2O2ð Þ�kref �k•OH refð Þ (17)
Where, k•OH,kUV=H2O2ð Þ andk(UV) represent thesecondorder rate constantofhydroxyl radical,
UV/H2O2, fluence based rate constant of UV/hydrogen peroxide process and UV, fluence
based rate constant of direct photolysis, respectively. The notations “s” and “ref” represents
thesubstrateandreferencecompounds,which inourcase isBZFandp-CBA, respectively.For
thedeterminationof•OHrate constantwithBZF, twosetsof experimentswereperformed. In
onesetofexperiments, thesolutioncontaining27.63ÎĽMofBZF,27.63ÎĽMofp-CBAand1mM
Figure 2. Determination of bimolecular rate constant of BZFwith •OH; inset shows the degradation kinetics of BZF
alone,p-CBAalone,BZF+H2O2,pCBA+H2O2exposed toUV-irradiation.
Competition Kinetics: An Experimental Approach
http://dx.doi.org/10.5772/intechopen.70483 85
back to the
book Advanced Chemical Kinetics"
Advanced Chemical Kinetics
- Title
- Advanced Chemical Kinetics
- Author
- Muhammad Akhyar Farrukh
- Editor
- InTech
- Location
- Rijeka
- Date
- 2018
- Language
- English
- License
- CC BY 4.0
- ISBN
- 978-953-51-3816-7
- Size
- 18.0 x 26.0 cm
- Pages
- 226
- Keywords
- Engineering and Technology, Chemistry, Physical Chemistry, Chemical Kinetics
- Categories
- Naturwissenschaften Chemie