scholarly journals High Efficient Photocatalytic Degradation of 3,7-Bis(Dimethylamino)-Phenothiazin-5-Ium Chloride Dye and Kinetics of H2 Evolution of N2H4H2O by Synthesized CdS/NiS Nanocomposite by Electrochemical Method

2021 ◽  
Vol 10 (02) ◽  
pp. 15-35
Author(s):  
R. Shilpa ◽  
H. C. Charan Kumar ◽  
Sanniaha Ananda
Keyword(s):  
Photocatalytic Degradation ◽  
Electrochemical Method ◽  
H2 Evolution ◽  
High Efficient ◽  
Kinetics Of

Photocatalytic degradation intrinsic kinetics of gaseous cyclohexane in a fluidized bed photocatalytic reactor

2012 ◽  
Vol 39 (4) ◽  
pp. 1711-1726 ◽  
Author(s):  
Qijin Geng ◽  
Qingming Wang ◽  
Yunchen Zhang ◽  
Lintong Wang ◽  
Huiqin Wang
Keyword(s):  
Photocatalytic Degradation ◽  
Fluidized Bed ◽  
Photocatalytic Reactor ◽  
Intrinsic Kinetics ◽  
Kinetics Of

scholarly journals Kinetics of CxNy formation on electrode surface using the electrochemical method

2008 ◽  
Vol 40 (2) ◽  
pp. 147-154
Author(s):  
A. Chekhovskii ◽  
T. Tomila ◽  
A. Ragulya ◽  
I. Timofeeva ◽  
A. Ivanchuk ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Ir Spectroscopy ◽  
Electrode Material ◽  
Electrode Surface ◽  
Electrochemical Method ◽  
Deposition Process ◽  
Absorption Bands ◽  
X Ray ◽  
Kinetics Of ◽  
Electrolysis Products

Powded CxNy coatings were deposited from acetonitrile on Ni, Si, and C surfaces at a voltage 500-2000 V by the electrochemical method. Electrolysis products were analyzed by IR spectroscopy, X-ray phase analysis and electron microscopy. According to FTIR data, at frequencies 1370 and 1530 cm-1, absorption bands characteristic for stretching C-N and C=N oscillations are observed. The obtained results indicate that the deposition process occurs in a different manner in each specific case, i.e., the kinetics of the electrode depends on the electrode material (Ni, Si, and C).

scholarly journals Supported TiO2 on Borosilicate Glass Plates for Efficient Photocatalytic Degradation of Fenamiphos

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
A. El Yadini ◽  
H. Saufi ◽  
P. S. M. Dunlop ◽  
J. Anthony Byrne ◽  
M. El Azzouzi ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Borosilicate Glass ◽  
High Performance ◽  
Order Kinetic ◽  
Degussa P25 ◽  
Plausible Mechanism ◽  
Kinetics Of Degradation ◽  
Glass Plates ◽  
Kinetics Of ◽  
Sulfonamide Group

Supported titanium dioxide (TiO2) was investigated for the photodegradation of the insecticide fenamiphos in water. The photocatalyst was immobilised on borosilicate glass plates and the kinetics of degradation were studied in a stirred tank reactor under UV irradiation. Two types of TiO2, for example, Millennium PC500 (100% anatase) and Degussa P25 (80% anatase, 20% rutile), were used. Their activities have been based on the rates of insecticide disappearance. Experiments were investigated to evaluate the effect of pH and initial concentrations of fenamiphos as well as catalyst doses on the photocatalytic degradation of fenamiphos. Kinetic parameters were experimentally determined and an apparent first-order kinetic was observed. For photolysis process of fenamiphos, two photoproducts were identified and characterized using high performance liquid chromatography/mass spectrometry (HPLC/MS). The plausible mechanism of photolysis involved is the oxidation of sulfonamide group. In presence of photocatalyst TiO2, photodegradation was observed. Under identical conditions, Degussa P25 shows higher photocatalytic activity in regard to PC500 Millennium and complete degradation was observed after 180 min.

scholarly journals Synthesis and degradation kinetics of TiO2/GO composites with highly efficient activity for adsorption and photocatalytic degradation of MB

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ruifen Wang ◽  
Kaixuan Shi ◽  
Dong Huang ◽  
Jing Zhang ◽  
Shengli An
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Adsorption Capacity ◽  
Degradation Kinetics ◽  
Removal Rate ◽  
Strong Adsorption ◽  
Degradation Activity ◽  
Kinetics Of ◽  
Stacking Structure ◽  
Synthesis And Degradation

AbstractPoriferous TiO2/GO (denoted as TGO-x%) photocatalysts with ultrathin grapheme oxide (GO) layer were prepared by a hydrothermal method, the adsorption and photocatalytic degradation and its kinetics about Methylene blue(MB) were studied systematically. All the TGO-x% showed improved adsorption and photodegradation performance. TGO-25% had excellent adsorptivity while TGO-20% exhibit the highest visible light photocatalytic degradation activity. The adsorption capacity for TGO-25% was 20.25 mg/gcatalyst along with the k1 was about 0.03393 min·gcatalyst/mg, this enhancement was mainly owing to the strong adsorption capacity of GO and the stacking structure of sheets and nanoparticles. GO sheets prevented the agglomeration of TiO2 particles and TiO2 nanoparticles also prevented the agglomeration of GO sheets, which could provides greater surface area. Besides, the remarkably superior photodegradation activity of TiO2/GO composites is mainly attribute to the strong absorption of visible light and the effective charge separation revealed by the photoluminescence, the total removal rate of MB is 97.5% after 35 min adsorption and 140 min degradation, which is 3.5 times higher than that of TiO2.

Sun-light-driven plasmonic Ag/AgCl@TNT photocatalysts for high-efficient absorption-regeneration and photocatalytic degradation

2020 ◽  
Vol 529 ◽  
pp. 147010
Author(s):  
Xiaona Zhao ◽  
Pei Wu ◽  
Yuanchao Lei ◽  
Feitai Chen ◽  
Ze Yu ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
High Efficient ◽  
Sun Light

scholarly journals Kinetic Study of Application of ZnO as a Photocatalyst in Heterogeneous Medium

2009 ◽  
Vol 6 (2) ◽  
pp. 531-536 ◽  
Author(s):  
J. J. Vora ◽  
S. K. Chauhan ◽  
K. C. Parmar ◽  
S. B. Vasava ◽  
S. Sharma ◽  
...  
Keyword(s):  
Light Intensity ◽  
Photocatalytic Degradation ◽  
Kinetic Study ◽  
Heterogeneous Medium ◽  
Degradation Process ◽  
Probable Mechanism ◽  
Band Gaps ◽  
Light Control ◽  
Substrate Ph ◽  
Kinetics Of

The photocatalytic degradation of 2,4-dinitrophenol over ZnO was carried out in the presence of light. Control experiments were carried out. The photocatalytic degradation of 2,4-dinitrophenol was observed spectro-photmerically. The various parameters like concentrations of substrate, pH, amounts and band gaps of semiconductor, impact of light intensity, sensitizers and radical quenchers affected the kinetics of the degradation process. A probable mechanism for this process has been proposed.

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