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Density Functional Theory Study of Electronic Structure and Optical Properties of Ln 3+ -Doped γ-Bi 2 MoO 6 (Ln=Gd, Ho, Yb).
- Source :
- Crystals (2073-4352); Aug2023, Vol. 13 Issue 8, p1158, 15p
- Publication Year :
- 2023
-
Abstract
- Based on density functional theory (DFT), theoretical models of three kinds of lanthanide rare earth metal ion-doped γ-Bi<subscript>2</subscript>MoO<subscript>6</subscript> were constructed (Ln-BMO (Ln=Gd, Ho, Yb)). The geometric structure, electronic structure, and optical properties of the model were calculated, and the influence of doped Ln<superscript>3+</superscript> ions on the structures and properties of the system was analyzed. The results revealed that the substitution of smaller ionic radius Ln<superscript>3+</superscript> ions for Bi<superscript>3+</superscript> ions caused a contraction of the lattice parameters. At the same time, the contribution of the [Ln]4d near valence band and conduction band reduced the bandwidth of γ-Bi<subscript>2</subscript>MoO<subscript>6</subscript>, forming the Ln-O ionic bond with different strengths to obtain higher charge conductivity and charge-separation ability. Secondly, Ln<superscript>3+</superscript> ions have a strongly ionic charge, which leads to the appearance of optical absorption bands in the infrared region and part of the visible region. This reduces the reflection in the visible region, improves the utilization rate, delays the loss of electron energy, and promotes phase matching in the visible region. And the Gd<superscript>3+</superscript>-doped system has better photocatalytic activity than the other Ln<superscript>3+</superscript>-doped system. This research provides theoretical insights into doped lanthanide rare earth ions and also provides strategies for the modification of γ-Bi<subscript>2</subscript>MoO<subscript>6</subscript> nanomaterials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20734352
- Volume :
- 13
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Crystals (2073-4352)
- Publication Type :
- Academic Journal
- Accession number :
- 170742360
- Full Text :
- https://doi.org/10.3390/cryst13081158