Kinetic Study of the Oxidatwe Decolorization of Xylenol Orange by Hydrogen Peroxide in Micellar Medium

Abstract

The kinetics of the oxidation of xylenol orange tetrasodium salt by hydrogen peroxide was investigated in the presence of cationic surfactant (Ndodecylpyridinium chloride) & strongly basic media over the temperature range 20 -35 °C. The kinetics studies were carried out as a function of different variables like concentration, pH and temperature. The described reaction rate is greatly catalyzed by the presence of trace amount of Co(II) ions & followed pseudosecond-order with respect to dye concentration. Possible mechanism for the catalyzed and uncatalyzed reactions is proposed and found to be coincident with the experimental findings. The derived rate equation is in good agreement with the experimental observations. Thermodynamic parameters were also evaluated.

Enzyme-like activity of cobalt-MOF nanosheets for hydrogen peroxide electrochemical sensing

“…Then, oxidation of the bound H2O2 would involve a homogeneous pathway assisted by the generation of reactive oxygen species (reaction 4-8) [45]:…”

Tuning Selectivity in the Visible-Light-Promoted Coupling of Thiols with Alkenes by EDA vs TOCO Complex Formation

“…In Scheme , a possible mechanism for both thiol coupling and β-hydroxysulfide synthesis in the presence of aromatic alkenes was identified based on literature evidence , and control experiments. DABCO first deprotonates thiophenol ( 1a ), which is then oxidized by active oxygen molecules in the presence of light to produce thiol radical intermediates A .…”

Influence of Xylenol Orange Dye on Optical, Thermal, Dielectric, Laser Damage Threshold and Mechanical Properties of L-Alanine Thiourea (LATU) Single Crystals

“…Among these the second harmonic generation efficiency (SHG) of glycine Thiourea crystal was 0.5 times that of KDP crystal, the SHG efficiency of L-Histidine Thiourea crystal 4.1 times that of KDP crystal and Methylene blue admixtured LAlanine Thiourea crystal 1.56 times that of KDP crystal. Many researchers have worked on dye admixtured potassium dihydrogen phosphate and potassium acid phthalate nonlinear optical crystals in order to improve their nonlinear response [13,14]. Xylenol orange [3, 3" bis [N, N"-Di(carboxymethyl) -aminomethyl -O -cresolsulphone -phthalein tetrasodium salt] (XO), a heterocyclic species which belongs to the acidic class of dyes.…”