Comment on “Photocatalytic Oxidation of Arsenite on TiO2:  Understanding the Controversial Oxidation Mechanism Involving Superoxides and the Effect of Alternative Electron Acceptors”

2007 ◽  
Vol 41 (17) ◽  
pp. 6311-6312 ◽  
Author(s):  
W. H. Leng ◽  
X. F. Cheng ◽  
J. Q. Zhang ◽  
C. N. Cao
Keyword(s):  
Photocatalytic Oxidation ◽  
Oxidation Mechanism ◽  
Electron Acceptors

Photocatalytic Oxidation Mechanism of As(III) on TiO2: Unique Role of As(III) as a Charge Recombinant Species

2010 ◽  
Vol 44 (23) ◽  
pp. 9099-9104 ◽  
Author(s):  
Wonyong Choi ◽  
Jiman Yeo ◽  
Jungho Ryu ◽  
Takashi Tachikawa ◽  
Tetsuro Majima
Keyword(s):  
Photocatalytic Oxidation ◽  
Oxidation Mechanism ◽  
Unique Role ◽  
A Charge

scholarly journals Aqueous Photocatalytic Oxidation of Lignin: The Influence of Mineral Admixtures

2007 ◽  
Vol 2007 ◽  
pp. 1-7 ◽  
Author(s):  
Elina Portjanskaja ◽  
Sergei Preis
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Oxidation ◽  
Catalyst Support ◽  
Oxidation Mechanism ◽  
Ion Concentration ◽  
Mineral Admixtures ◽  
Oh Radicals ◽  
Ferrous Ions ◽  
The Difference ◽  
The One

The photocatalytic oxidation (PCO) of UV-irradiated aqueous solutions containing lignin onTiO2was studied for the influence of ferrous ions. The addition ofFe2+, up to 2.8 mgL−1, to the acidic lignin solution leads to the drastic, for about 25%, increase in PCO efficiency. A further increase in ferrous ion concentration results in a decrease in PCO efficiency of lignin. The maximum PCO efficiency, up to 9.2 mgW−1h−1, was observed in neutral and slightly basic media: the oxidation mechanism with OH-radicals seems to prevail. Also, the difference in the PCO performance with a different attachment mode of titanium dioxide on the catalyst support was observed. Sprayed catalyst exhibited 1.5 times higher efficiency than the one attached by submersion, although sprayed one was easily resuspended in acidic lignin solutions. The efficiency of the N-doped photocatalyst active in visible light was observed to be negligible with lignin.

Fabrication of Ag@AgCl with Enhanced Plasmonic Photocatalysis Performance via a Deep Eutectic Solvent

2019 ◽  
Vol 72 (3) ◽  
pp. 200 ◽  
Author(s):  
Jianhua Ge ◽  
Yuchong Chen ◽  
Jing Xu ◽  
Yujie Liu ◽  
Long Zhang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Photocatalytic Oxidation ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Oxidation Mechanism ◽  
Photocatalytic Property ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plasmonic Photocatalyst ◽  
Facile Solvothermal Method

The plasmonic photocatalyst Ag@AgCl was successfully prepared through a facile solvothermal method via a deep eutectic solvent (DES), which is composed of choline chloride and urea. X-Ray diffraction, scanning electron microscopy, energy-dispersive X-ray, element-mapping, X-ray photoelectron spectroscopy, N2 absorption–desorption, and UV-vis diffuse reflectance techniques were adopted to analyse the performance of the plasmonic photocatalyst. Characterisation results indicated that the DES not only served as a solvent and Cl source, but also as a reductant. Meanwhile, the probable mechanism for the formation of Ag@AgCl is discussed, which revealed a visible light enhanced photocatalytic property for the degradation of benzidine. Furthermore, the photocatalyst showed no decrease in its catalytic activity even after five cycles of operation. Finally, a possible photocatalytic oxidation mechanism of Ag@AgCl is proposed.

Chemoselective photocatalytic oxidation of alcohols to aldehydes and ketones by nitromethane on titanium dioxide under violet 400 nm LED light irradiation

2020 ◽  
Vol 18 (12) ◽  
pp. 2326-2330 ◽  
Author(s):  
Azam Rahimi Niaraki ◽  
Mohammad Reza Saraee ◽  
Foad Kazemi ◽  
Babak Kaboudin
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Oxidation ◽  
Electron Acceptors ◽  
Light Irradiation ◽  
Led Light ◽  
Oxidation Of Alcohols ◽  
Aldehydes And Ketones ◽  
First Time ◽  
Led Irradiation

In this study, for the first time, nitroalkanes, especially nitromethane, have been used as electron acceptors for the highly chemoselective oxidation of alcohols in the presence of a TiO2 photocatalyst under 400 nm LED irradiation.

A facile synthesis of a highly efficient β-Bi2O3/Bi2O2CO3 heterojunction with enhanced photocatalytic NO oxidation under visible light

2020 ◽  
Vol 44 (26) ◽  
pp. 10989-10993
Author(s):  
Yaru Hao ◽  
Zhaoqi Deng ◽  
Ziquan Zhao ◽  
Xijia Song
Keyword(s):  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Oxidation Mechanism ◽  
No Oxidation ◽  
Facile Synthesis ◽  
Highly Efficient

Photocatalytic oxidation mechanism of NO on β-Bi2O3/Bi2O2CO3.

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