Author:
González Ramirez I A,Alcalá Varilla L A,Montoya J A
Abstract
Abstract
A comparative study is presented, based on Density Functional Theory, of the influence that the different approximations of the exchange-correlation functional have on the structural and electronic properties of titanium dioxide in the anatase phase. In this work, the method of plane waves and pseudopotentials, as implemented in the Quantum Espresso package was used. The approximations to the correlation-exchange functional that were considered are the local density approximation, the generalized gradient approximation in the form of Perdew-Burke-Ernzerhof, the Perdew-Burke-Ernzerhof for solids, and the Perdew-Wang 91. For each case, the effects due to the inclusion of spin (spin polarization), and the correction of Hubbard (U=4.2 eV for Ti) were also studied. We found that the Perdew-Burke-Ernzerhof for solids functional offers the best results for the calculation of the lattice parameters and bond lengths, followed by the local density approximation with the Hubbard correction included. For the bond angles, the best description was obtained with the local density approximation. The inclusion of the U term increases the errors associated with the mentioned structural parameters when the following functionals are used: Perdew-Burke-Ernzerhof, Perdew-Burke-Ernzerhof for solids and Perdew-Wang 91. The Perdew-Burke-Ernzerhof and Perdew-Wang 91 functionals show the largest errors when the Hubbard correction is used; while the local density approximation shows significant improvement when the Hubbard correction is included. Regarding the energy gap, we found that the introduction of the U term improves the estimation of this property for all the approximations included in this work.
Subject
General Physics and Astronomy
Reference30 articles.
1. The surface science of titanium dioxide;Diebold;Surf. Sci. Rep.,2003
2. Titanium dioxide nanomaterials: Synthesis, properties, modifications, and applications;Chen;Chem. Rev.,2007
3. A surface science perspective on TiO2 photocatalysis;Henderson;Surf. Sci. Rep.,2011
4. Tratamiento fotocatalítico de aguas residuales generadas en laboratorios con presencia del indicador verde de bromocresol;Mera;Revista Lasallista de Investigacin,2011
5. Caracterización de cerámicos inmersos en soluciones del sistema SiO2-TiO2-ZrO2 sintetizadas por el método sol-gel;Molina;Revista UIS Ingenierías,2017
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Bandgap engineering of CuO/TiO2 nanocomposites and their synergistic effect on the performance of dye-sensitized solar cells;Optical Materials;2024-02
2. Understanding the prototype catalyst TiO2 surface with the help of density functional theory calculation;WIREs Computational Molecular Science;2023-09-02
3. First-principles investigations of structural, electronic, vibrational, and thermoelectric properties of half-Heusler VYGe(Y=Rh, Co, Ir)compounds;Computational Condensed Matter;2023-09
4. Effect of exchange-correlations and pseudopotentials on the structural and cohesive properties of fundamental refractory metals (Nb, Mo, Ta, W and Re);The European Physical Journal B;2023-05
5. The adsorption of NO2, SO2, and O3 molecules on the Al-doped stanene nanotube: a DFT study;Journal of Molecular Modeling;2022-09-03