Density functional approaches for the interaction of metal oxides with small molecules
Date Issued
2014-05-07
Author(s)
Supervisors
Referees
Abstract
The density functional tight-binding (DFTB) and time-dependent DFTB (TD-DFTB) methods are here extended. The incorporation of one-center exchange-like terms in the expansion of multicenter integrals leads to a DFTB scheme in which the fluctuation of the dual density matrix is treated self-consistently. This formalism improves upon hydrogen bond energies of neutral, protonated and hydroxide water clusters as well as of methylimidazole-water complexes. An analogous correction for TD-DFTB leads to marked qualitative and quantitative improvements over the original method. These formalisms are employed to investigate the structural and optical properties of titanium dioxide complexed with nitric oxide and acetaldehyde. Additionally, density functional theory (DFT) and DFTB are employed to investigate the structural and electronic properties of the interfaces between zinc oxide and several organic molecules.
Subjects
DFT
;
DFTB
;
TD-DFTB
;
TD-DFT
;
Density Functional Theory
;
Tight Binding
;
metal oxide
;
photocatalysis
;
titanium dioxide
;
zinc oxide
;
titania
;
TiO2
;
ZnO
;
organic/inorganic hybrid interfaces
;
surface functionalization
;
nitric oxide
;
nitrogen oxide
;
nitrogen monoxide
;
NO
;
acetaldehyde
;
photodegradation
Institution
Type
Dissertation
Secondary publication
No
Language
English
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00103868-1.pdf
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12.62 MB
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Adobe PDF
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