Optical absorption of transition metal ions in silica coating films prepared by the sol-gel technique

1983 ◽  
Vol 2 (8) ◽  
pp. 395-396 ◽  
Author(s):  
S. Sakka ◽  
K. Kamiya ◽  
K. Makita ◽  
Y. Yamamoto
Keyword(s):  
Transition Metal ◽  
Optical Absorption ◽  
Metal Ions ◽  
Sol Gel ◽  
Silica Coating ◽  
Transition Metal Ions ◽  
Coating Films ◽  
Gel Technique

scholarly journals OPTICAL ABSORPTION AND EPR STUDY OF TRANSITION METAL IONS DOPED PHOSPHATE GLASSES

1996 ◽  
Vol 6 (0) ◽  
pp. 241-244 ◽  
Author(s):  
MOHAMED HAOUARI ◽  
HAFEDH BEN OUADA ◽  
HASSEN MAAREF ◽  
HUBERT HOMMEL ◽  
ANDRE PIERRE LEGRAND
Keyword(s):  
Transition Metal ◽  
Optical Absorption ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Phosphate Glasses

The crystal chemistry of (Mn3 +, Fe3+)-substituted andalusites (viridines and kanonaite), (Al1−x−yMn3x+Fe3y+)2 (OǀSiO4): crystal structure refinements, Mössbauer, and polarized optical absorption spectra

1981 ◽  
Vol 155 (1-2) ◽  
Author(s):  
I. Abs-Wurmbach ◽  
K. Langer ◽  
F. Seifert ◽  
E. Tillmanns
Keyword(s):  
Crystal Structure ◽  
Transition Metal ◽  
Optical Absorption ◽  
Metal Ions ◽  
Crystal Chemistry ◽  
Mixed Crystal ◽  
Transition Metal Ions ◽  
Structure Type ◽  
Optical Absorption Spectra ◽  
Distorted Octahedral

AbstractThe crystal chemistry of viridines and kanonaite, (AlThe structure refinements reveal that the transition metal ions substitute for Al almost exclusively in the distorted octahedral Al(l) site of the andalusite structure type within the entire mixed crystal series. This is independently proven by the Mössbauer results for

The optical absorption spectra of certain transition metal ions in muscovite, lepidolite, and fuchsite

1968 ◽  
Vol 5 (1) ◽  
pp. 31-38 ◽  
Author(s):  
G. H. Faye
Keyword(s):  
Transition Metal ◽  
Optical Absorption ◽  
Metal Ions ◽  
Absorption Spectra ◽  
Transition Metal Ions ◽  
Ligand Field ◽  
Optical Absorption Spectra ◽  
Ligand Field Theory ◽  
Octahedral Sites ◽  
Sheet Silicate

The unpolarized optical absorption spectra of the sheet silicate minerals muscovite, lepidolite, and fuchsite have been examined. The spectra, interpreted on the basis of ligand field theory, indicate that all three minerals contain Fe3+ and possibly Ti3+ in octahedral sites. In addition, muscovite is shown to contain octahedrally coordinated Fe2+, lepidolite octahedral Fe2+ and Mn2+, and fuchsite octahedral Cr3+. No evidence was found for transition metals in tetrahedral sites.Some comments are made on the similarity of the spectra of certain of the transition metal ions in several classes of minerals. This leads to the speculation that the cations Fe3+, Mn2+, and Cr3+ may tend to 'mold' their immediate surroundings.

Luminescence and surface effects of closed-shell transition metal ions in sol-gel silica glasses

1997 ◽  
Vol 72-74 ◽  
pp. 417-418 ◽  
Author(s):  
Markus Herren ◽  
Kenji Yamanaka ◽  
Naoya Miyazaki ◽  
Makoto Morita
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Sol Gel ◽  
Surface Effects ◽  
Closed Shell ◽  
Transition Metal Ions ◽  
Silica Glasses

Experimental and Theoretical Study on Transition Metal Ion Doped TiO2

2011 ◽  
Vol 233-235 ◽  
pp. 2219-2222 ◽  
Author(s):  
Xue Chun Zhong ◽  
Zhan Chang Pan ◽  
Zhi Gang Wei ◽  
Shu Guang Xie ◽  
Zhen Jun Cheng ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Anatase Phase ◽  
Sol Gel ◽  
Transition Metal Ions ◽  
Transition Metal Ion ◽  
Visible Light Range ◽  
Visible Spectra ◽  
Uv Visible

In this paper, TiO2crystallines doped with transition metal ions have been prepared by sol-gel method. The UV-visible spectra indicated that the doping with transition metal ions (especially Cu2+, Mn2+and Cr3+ions) could effectively improve the absorption of TiO2crystals in the visible-light range. The XRD results showed that the doping does not affect the anatase phase of TiO2. The band structure and the UV-vis absorption spectrum of Mn2+ions doped-TiO2were also calculated by DFT (density function theory) method, which indicated that the doping with transition metal ion could make the band gap of TiO2smaller and a red shift in optical absorption.

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