Diffusion-Controlled Reactions of Molecular Oxygen on Porous Silica Glass: Coverage Dependence of Reaction and Diffusion Rates and Evidence for Surface Heterogeneity

1995 ◽  
Vol 99 (40) ◽  
pp. 14893-14902 ◽  
Author(s):  
Ohad Katz ◽  
Joshua Samuel ◽  
David Avnir ◽  
Michael Ottolenghi
Keyword(s):  
Molecular Oxygen ◽  
Silica Glass ◽  
Porous Silica ◽  
Surface Heterogeneity ◽  
Coverage Dependence ◽  
Diffusion Controlled ◽  
Diffusion Rates ◽  
Porous Silica Glass ◽  
And Diffusion ◽  
Reaction And Diffusion

scholarly journals Carbon Dioxide Capture in Homogeneous and Heterogeneous Surfaces of Porous Silica Glass

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1260
Author(s):  
Chontira Boonfung ◽  
Chaiyot Tangsathitkulchai ◽  
Atichat Wongkoblap
Keyword(s):  
Carbon Dioxide ◽  
Functional Groups ◽  
Adsorption Isotherms ◽  
Silica Glass ◽  
Surface Defects ◽  
Porous Silica ◽  
Surface Heterogeneity ◽  
Slit Pore ◽  
Porous Silica Glass ◽  
Carbon Dioxide Co2

Experimental and simulation studies for carbon dioxide (CO2) adsorption on porous silica glass were performed to reveal how surface heterogeneity can affect the adsorption mechanism of CO2. In performing the simulation, the structure of porous silica glass was modeled as a slit pore consisting of parallel walls of connected SiO4 units. The adsorption isotherms of CO2 at 283 K were generated for a series of pore widths using a Monte Carlo ensemble. The defective surfaces created by random removal of surface atoms and the surfaces containing hydroxyl functional groups were chosen to represent the surface heterogeneity for the simulation tasks. The isotherms derived for the defective surfaces showed a rapid adsorption at low pressures because of the stronger interaction between the rough nonuniform surfaces and CO2 molecules. For the role of surface functional groups, the adsorption isotherms dramatically increased with an increasing number of functional groups. The amount of CO2 adsorbed for randomly placed functional groups was greater than that for the presence of functional groups at the pore edges. The proper control of surface heterogeneity by manipulating both the amounts of hydroxyl surface groups and surface defects should help enhance the efficient capture of CO2 in porous silica glass.

Viscous flow flash sintering of porous silica glass

2017 ◽  
Vol 476 ◽  
pp. 60-66 ◽  
Author(s):  
Miguel Oscar Prado ◽  
Mattia Biesuz ◽  
Matteo Frasnelli ◽  
Franco Emmanuel Benedetto ◽  
Vincenzo M. Sglavo
Keyword(s):  
Viscous Flow ◽  
Silica Glass ◽  
Porous Silica ◽  
Flash Sintering ◽  
Porous Silica Glass

Photocatalytic Isomerization of Butene-2 on Porous Silica Glass

1977 ◽  
Vol 104 (4-6) ◽  
pp. 309-320 ◽  
Author(s):  
A. Morikawa ◽  
M. Hattori ◽  
K. Yagi ◽  
K. Otsuka
Keyword(s):  
Silica Glass ◽  
Porous Silica ◽  
Porous Silica Glass

Prediction of the thermal radiative properties of an x-ray μ-tomographied porous silica glass

2007 ◽  
Vol 46 (20) ◽  
pp. 4266 ◽  
Author(s):  
Benoit Rousseau ◽  
Domingos de Sousa Meneses ◽  
Patrick Echegut ◽  
Marco Di Michiel ◽  
Jean-François Thovert
Keyword(s):  
Silica Glass ◽  
Porous Silica ◽  
Radiative Properties ◽  
X Ray ◽  
Thermal Radiative Properties ◽  
Porous Silica Glass

Infrared Spectrum of Ammonia Adsorbed on Porous Silica Glass

1955 ◽  
Vol 23 (10) ◽  
pp. 1980-1981 ◽  
Author(s):  
D. J. C. Yates ◽  
N. Sheppard ◽  
C. L. Angell
Keyword(s):  
Infrared Spectrum ◽  
Silica Glass ◽  
Porous Silica ◽  
Porous Silica Glass

Micellar formation and correlation in the cavity of porous silica glass

1990 ◽  
Vol 42 (10) ◽  
pp. 6015-6023 ◽  
Author(s):  
K. F. Bradley ◽  
S.-H. Chen ◽  
P. Thiyagarajan
Keyword(s):  
Silica Glass ◽  
Porous Silica ◽  
Porous Silica Glass ◽  
Micellar Formation

scholarly journals 29Si MAS NMR Study of Porous Silica Glass Prepared from Sodium Borosilicate Glasses

1997 ◽  
Vol 105 (1224) ◽  
pp. 700-702 ◽  
Author(s):  
Isamu YAMAGUCHI ◽  
Hiroshi YAMASHITA ◽  
Takashi MAEKAWA
Keyword(s):  
Silica Glass ◽  
Porous Silica ◽  
Mas Nmr ◽  
Borosilicate Glasses ◽  
29Si Mas Nmr ◽  
Nmr Study ◽  
Porous Silica Glass
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