Preparation and band gap shift of nano-structured metal oxides and their activity in disinfection of water using laser induced photo-catalysis

2011 ◽  
Author(s):  
M.A. Gondal ◽  
M.A. Dastageer ◽  
A. Khalil
Keyword(s):  
Metal Oxides ◽  
Band Gap ◽  
Photo Catalysis

Semiempirical Correlation between the Optical Band Gap of Oxides and Hydroxides and the Electronegativity of Their Constituents

2000 ◽  
Vol 654 ◽  
Author(s):  
Francesco Di Quarto ◽  
Monica Santamaria ◽  
Salvatore Piazza ◽  
Carmelo Sunseri
Keyword(s):  
Metal Oxides ◽  
Band Gap ◽  
Optical Band Gap ◽  
Experimental Results ◽  
Passive Films ◽  
Metal Hydroxides ◽  
Amorphous Tio2 ◽  
The Difference

AbstractOn the basis of new experimental results a previous proposed correlation between the optical band gap of oxides and the difference of electronegativity of their constituents is extended to mixed crystalline and amorphous TiO2-Fe2O3 (d,d-metal oxides) as well as to amorphous passive films grown on Al-Ta, Al-Ti, Al-Nb and Al-W alloys (sp,d-metal oxides). Moreover in analogy with previous results on anhydrous oxides, a correlation is proposed between the optical band gap of hydroxides and the electronegativities of their constituents after substituting the electronegativity of hydroxilic group to that of the oxygen. Like in the case of anhydrous oxides, two different interpolation lines have been found for sp-metal and d-metal hydroxides, respectively.

Band-Gap Engineering of Metal Oxides for Dye-Sensitized Solar Cells

2006 ◽  
Vol 110 (43) ◽  
pp. 21899-21902 ◽  
Author(s):  
M. Dürr ◽  
S. Rosselli ◽  
A. Yasuda ◽  
G. Nelles
Keyword(s):  
Solar Cells ◽  
Metal Oxides ◽  
Band Gap ◽  
Dye Sensitized Solar Cells ◽  
Band Gap Engineering ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Thermodynamic correlations and band gap calculations in metal oxides

2004 ◽  
Vol 32 (3-4) ◽  
pp. 207-217 ◽  
Author(s):  
J PORTIER ◽  
H HILAL ◽  
I SAADEDDIN ◽  
S HWANG ◽  
M SUBRAMANIAN ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Band Gap

P-type doping of organic wide band gap materials by transition metal oxides: A case-study on Molybdenum trioxide

2009 ◽  
Vol 10 (5) ◽  
pp. 932-938 ◽  
Author(s):  
Michael Kröger ◽  
Sami Hamwi ◽  
Jens Meyer ◽  
Thomas Riedl ◽  
Wolfgang Kowalsky ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Band Gap ◽  
Transition Metal Oxides ◽  
Molybdenum Trioxide ◽  
Wide Band ◽  
Wide Band Gap ◽  
P Type

scholarly journals Lewis Acid Site and Hydrogen-Bond-Mediated Polarization Synergy in the Catalysis of Diels–Alder Cycloaddition by Band-Gap Transition-Metal Oxides

ACS Catalysis ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 701-715 ◽  
Author(s):  
Taha Salavati-fard ◽  
Efterpi S. Vasiliadou ◽  
Glen R. Jenness ◽  
Raul F. Lobo ◽  
Stavros Caratzoulas ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Transition Metal ◽  
Metal Oxides ◽  
Band Gap ◽  
Lewis Acid ◽  
Transition Metal Oxides ◽  
Acid Site ◽  
Lewis Acid Site ◽  
Diels Alder

Surface Band Gaps and Superexchange Interaction in Transition Metal Oxides

1995 ◽  
Vol 401 ◽  
Author(s):  
J. J. M. Pothuizen ◽  
O. Cohen ◽  
G. A. Sawatzky
Keyword(s):  
Charge Transfer ◽  
Transition Metal ◽  
Metal Oxides ◽  
Band Gap ◽  
Transition Metal Oxides ◽  
Band Gaps ◽  
Superexchange Interaction ◽  
Surface Band ◽  
Madelung Potential

AbstractIn this paper, we discuss the change in the band gap of charge transfer insulators for different surface terminations. We have calculated the Madelung potential of the unreconstructed (100) surfaces of the rocksalt structured TM-O compounds (TM = Mn, Fe, Co and Ni). We also considered possible step defects on a (100) surface. The presented results are calculated in both the purely ionic case (TM2+O2−) and in the strong ligand p - cation 4s, phybridization (TM1+O1−) case. In both cases the charge transfer gap, Δ, for the surface is reduced compared to the bulk value. As a consequence of this reduction there is a large increase of the surface superexchange interaction, Jsur, and a decrease of the band gap.

Sign in / Sign up

Export Citation Format

Share Document