Kinetics and Mechanisms of Photocatalyzed Total Oxidation Reaction of Hydrocarbon Species with Titanium Dioxide in the Gas Phase

2005 ◽  
Vol 28 (7) ◽  
pp. 783-789 ◽  
Author(s):  
M. Finger ◽  
A. Haeger ◽  
D. Hesse
Keyword(s):  
Titanium Dioxide ◽  
Gas Phase ◽  
Oxidation Reaction ◽  
Total Oxidation

scholarly journals Differences in the Catalytic Behavior of Au-Metalized TiO2 Systems During Phenol Photo-Degradation and CO Oxidation

Catalysts ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 331 ◽  
Author(s):  
Oscar Laguna ◽  
Julie Murcia ◽  
Hugo Rojas ◽  
Cesar Jaramillo-Paez ◽  
Jose Navío ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Gas Phase ◽  
Noble Metal ◽  
Oxidation Reaction ◽  
Considerable Increase ◽  
Deposition Time ◽  
Phenol Degradation ◽  
Photo Degradation ◽  
Co Oxidation Reaction ◽  
Phenol Conversion

For this present work, a series of Au-metallized TiO2 catalysts were synthesized and characterized in order to compare their performance in two different catalytic environments: the phenol degradation that occurs during the liquid phase and in the CO oxidation phase, which proceeds the gas phase. The obtained materials were analyzed by different techniques such as XRF, SBET, XRD, TEM, XPS, and UV-Vis DRS. Although the metallization was not totally efficient in all cases, the amount of noble metal loaded depended strongly on the deposition time. Furthermore, the differences in the amount of loaded gold were important factors influencing the physicochemical properties of the catalysts, and consequently, their performances in the studied reactors. The addition of gold represented a considerable increase in the phenol conversion when compared with that of the TiO2, despite the small amount of noble metal loaded. However, this was not the case in the CO oxidation reaction. Beyond the differences in the phase where the reaction occurred, the loss of catalytic activity during the CO oxidation reaction was directly related to the sintering of the gold nanoparticles.

Gas-phase photocatalytic oxidation of benzene over titanium dioxide loaded on Ce0.67Zr0.33O2

2009 ◽  
Vol 28 (4) ◽  
pp. 519-524 ◽  
Author(s):  
Zhong Junbo ◽  
Jiang Weidong ◽  
Xu Bin ◽  
He Xiyang ◽  
Li Jianzhang ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Gas Phase ◽  
Photocatalytic Oxidation ◽  
Oxidation Of Benzene

Artificial Photosynthesis - Use of a Ferroelectric Photocatalyst

2012 ◽  
Vol 1446 ◽  
Author(s):  
Steve Dunn ◽  
Matt Stock
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Titanium Dioxide ◽  
Lithium Niobate ◽  
Gas Phase ◽  
Remnant Polarization ◽  
Artificial Photosynthesis ◽  
Reaction Pathway ◽  
Mercury Lamp ◽  
Low Levels

ABSTRACTThe solid-gas phase photoassisted reduction of carbon dioxide (artificial photosynthesis) was performed using ferroelectric lithium niobate and titanium dioxide as photocatalysts. Illumination with a high pressure mercury lamp and visible sunlight showed lithium niobate achieved unexpectedly high conversion of CO2 to products despite the low levels of band gap light available and outperformed titanium dioxide under the conditions used. The high reaction efficiency of lithium niobate is explained due to its strong remnant polarization (70 μC/cm2) thought to allow longer lifetime of photo induced carriers as well as an alternative reaction pathway.

Titanium dioxide/carbon nitride nanosheet nanocomposites for gas phase CO2 photoreduction under UV-visible irradiation

2019 ◽  
Vol 242 ◽  
pp. 369-378 ◽  
Author(s):  
Angus Crake ◽  
Konstantinos C. Christoforidis ◽  
Robert Godin ◽  
Benjamin Moss ◽  
Andreas Kafizas ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Gas Phase ◽  
Carbon Nitride ◽  
Co2 Photoreduction ◽  
Visible Irradiation ◽  
Uv Visible

Photocatalytic degradation of trichloroethylene in the gas phase using titanium dioxide pellets

1993 ◽  
Vol 70 (1) ◽  
pp. 95-99 ◽  
Author(s):  
S. Yamazaki-Nishida ◽  
K.J. Nagano ◽  
L.A. Phillips ◽  
S. Cervera-March ◽  
M.A. Anderson
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Gas Phase
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