Photoinduced Changes of Surface and Adsorbed Water in TiO2Photocatalytic Systems as Studied by Solid State1H-NMR Spectroscopy

2002 ◽  
Vol 31 (3) ◽  
pp. 420-421 ◽  
Author(s):  
Atsuko Y. Nosaka ◽  
Toshimichi Fujiwara ◽  
Hiromasa Yagi ◽  
Hideo Akutsu ◽  
Yoshio Nosaka
Keyword(s):  
Nmr Spectroscopy ◽  
Adsorbed Water ◽  
Photoinduced Changes

Photoinduced Changes of Adsorbed Water on a TiO2Photocatalytic Film As Studied by1H NMR Spectroscopy

2003 ◽  
Vol 107 (44) ◽  
pp. 12042-12044 ◽  
Author(s):  
Atsuko Y. Nosaka ◽  
Eiichi Kojima ◽  
Toshimichi Fujiwara ◽  
Hiromasa Yagi ◽  
Hideo Akutsu ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Adsorbed Water ◽  
Photoinduced Changes

Study of Hydrated Structures on the Surface of Mesoporous Silicas and Carbosils by1H NMR Spectroscopy of Adsorbed Water†

Langmuir ◽  
1997 ◽  
Vol 13 (5) ◽  
pp. 1237-1244 ◽  
Author(s):  
V. V. Turov ◽  
R. Leboda ◽  
V. I. Bogillo ◽  
J. Skubiszewska-Ziȩba
Keyword(s):  
Nmr Spectroscopy ◽  
Adsorbed Water ◽  
Mesoporous Silicas

Hydrated form of some clay minerals observed using a film sealed environmental cell

1978 ◽  
Vol 36 (1) ◽  
pp. 72-73
Author(s):  
N. Kohyama ◽  
K. Fukushima ◽  
A. Fukami
Keyword(s):  
Clay Minerals ◽  
Morphological Changes ◽  
Carbon Film ◽  
Electron Microscopic Observation ◽  
Adsorbed Water ◽  
Electron Microscopic ◽  
Hydrated Form ◽  
Thin Carbon ◽  
Environmental Cell ◽  
Thin Carbon Film

Since the interlayer or adsorbed water of some clay minerals are quite easily dehydrated in dried air, in vacuum, or at moderate temperatures even in the atmosphere, the hydrated forms have not been observed by a conventional electron microscope(TEM). Recently, specific specimen chambers, “environmental cells(E.C.),” have been developed and confirmed to be effective for electron microscopic observation of wet specimen without dehydration. we observed hydrated forms of some clay minerals and their morphological changes by dehydration using a TEM equipped with an E.C..The E.C., equipped with a single hole copper-microgrid sealed by thin carbon-film, attaches to a TEM(JEM 7A) with an accelerating voltage 100KV and both gas pressure (from 760 Torr to vacuum) and relative humidity can be controlled. The samples collected from various localities in Japan were; tubular halloysite (l0Å) from Gumma Prefecture, sperical halloysite (l0Å) from Tochigi Pref., and intermediate halloysite containing both tubular and spherical types from Fukushima Pref..

Unitary bounds and controllability of quantum evolution in NMR spectroscopy

1999 ◽  
Vol 96 (12) ◽  
pp. 1739-1744 ◽  
Author(s):  
T. S. UNTIDT, S. J. GLASER, C. GRIESIN
Keyword(s):  
Nmr Spectroscopy ◽  
Quantum Evolution
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