scholarly journals The role of adsorbed water on TiO2 particles in the electrorheological effect

AIP Advances ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 105319
Author(s):  
Zhaohui Qiu ◽  
Jing Huang ◽  
Rong Shen ◽  
Ying Wang ◽  
Xiaoyi Wu ◽  
...  
Keyword(s):  
Adsorbed Water ◽  
Tio2 Particles ◽  
Electrorheological Effect

Direct evidence of the key role of UV-formed peroxide species in photocatalytic gas–solid oxidation in air on anatase TiO2 particles

2020 ◽  
Vol 22 (4) ◽  
pp. 2200-2211 ◽  
Author(s):  
Irina Rudol’fovna Subbotina ◽  
Denis Valer’evich Barsukov
Keyword(s):  
Photocatalytic Oxidation ◽  
Direct Evidence ◽  
Adsorbed Water ◽  
Anatase Tio2 ◽  
Tio2 Particles ◽  
Oxidation In Air ◽  
Water Gas

Surface peroxide species are key intermediates of photocatalytic oxidation at the TiO2 adsorbed water–gas interface.

γ-Alumina and Amorphous Silica–Alumina: Structural Features, Acid Sites and the Role of Adsorbed Water

2017 ◽  
Vol 60 (19-20) ◽  
pp. 1554-1564 ◽  
Author(s):  
Vicente Sanchez Escribano ◽  
Gabriella Garbarino ◽  
Elisabetta Finocchio ◽  
Guido Busca
Keyword(s):  
Amorphous Silica ◽  
Adsorbed Water ◽  
Structural Features ◽  
Acid Sites ◽  
Silica Alumina

Photocatalytic mineralization of benzene over gold containing titania nanotubes: Role of adsorbed water and nanosize gold crystallites

2009 ◽  
Vol 141 (1-2) ◽  
pp. 144-151 ◽  
Author(s):  
S.V. Awate ◽  
R.K. Sahu ◽  
M.D. Kadgaonkar ◽  
R. Kumar ◽  
N.M. Gupta
Keyword(s):  
Adsorbed Water ◽  
Titania Nanotubes

Oxidising Role of Water Vapour in the 250 Kev D+ Induced Radiolysis of Polyimide Kapton-H

1988 ◽  
Vol 100 ◽  
Author(s):  
U. K. Chaturvedi ◽  
A. Patnaik ◽  
Ramji Pathak ◽  
R. N. Chakraborty ◽  
A. K. Nigam
Keyword(s):  
Partial Pressure ◽  
Water Vapour ◽  
Ion Beam ◽  
Adsorbed Water ◽  
Vacuum System ◽  
Residual Water ◽  
Implantation Time ◽  
Polymeric Surface ◽  
Imide Ring

Residual water vapour present in the vacuum system has been observed to play a dominant oxidising role in the 250 keV D+ induced radiolysis of polyimide (Kapton-H). The partial pressure (pp) of water in the vacuum system decreases sharply as the D+ beam impinges the polymeric surface, but soon after, it recovers to its initial value as the accumulated dose increases. Emission of CO2 is observed which has its maximum at a time when the H2O partial pressure is at a minimum. The CO2 level also returns to its original level with time. This complementary variation of CO2 and H2O confirms that absorbed and adsorbed water molecules are radiolysed by the ion beam and initiate oxidation of the radiolytically evolved CO to yield CO2 on and within the ion implanted surface of the polyimide. Further, the small enhancement in the 28 amu peak (N2 + CO), which exhibits no maximum/minimum over the entire implantation time, can be understood in terms of the evolution of N2 from the imide ring as a result of radiolysis of this nitrogen containing polymers.

scholarly journals Moisture Induced Degradation of Porous Low-k Materials

2006 ◽  
Vol 914 ◽  
Author(s):  
Mikhail Baklanov ◽  
David O'Dwyer ◽  
Adam M Urbanowicz ◽  
Quoc Toan Le ◽  
Steven Demuynck ◽  
...  
Keyword(s):  
Water Film ◽  
Internal Surface ◽  
Hydrophobic Surface ◽  
Adsorbed Water ◽  
Bulk Water ◽  
Oh Groups ◽  
Film Bulk ◽  
Low K

AbstractInteraction of moisture with porous low-k films is evaluated by using in situ ellipsometry setup. The adsorbed water amount is calculated from change of refractive index measured during the adsorption. Pristine low-k films reversibly adsorb 2 - 5% of water that reflects presence of constitutive hydrophilic centrums. Plasma and thermal treatments increase the number of hydrophilic centrums. Once the amount of these centrums has reached a certain critical value sufficient to form a continuous water film, bulk water condensation is observed. Change of properties during the water adsorption in the damaged films is not fully reversible. Each additional adsorption cycle increases the dielectric function of the film because of decreasing porosity, increasing skeleton density and shrinkage. The pressure corresponding to the bulk condensation allows us to calculate internal contact angle (internal surface energy) of low-k materials. The water molecules adsorbed on separate OH groups play the role of a catalyst that hydrolyses the siloxane bridges initially present on hydrophobic surface.

The influence of Al doping on the photocatalytic activity of nanostructured ZnO: The role of adsorbed water

2018 ◽  
Vol 445 ◽  
pp. 376-382 ◽  
Author(s):  
Faten Ajala ◽  
Abdessalem Hamrouni ◽  
Ammar Houas ◽  
Hinda Lachheb ◽  
Bartolomeo Megna ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Adsorbed Water ◽  
Al Doping

The Role of Adsorbed Water on Pore Structure Characteristics and Methane Adsorption of Shale Clay

2018 ◽  
Author(s):  
Dong Feng ◽  
Xingfang Li ◽  
Chaojie Zhao ◽  
Jing Li ◽  
Qing Liu ◽  
...  
Keyword(s):  
Pore Structure ◽  
Adsorbed Water ◽  
Methane Adsorption ◽  
Structure Characteristics
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