Structural, photocatalytic and electroconductive properties of bismuth-substituted CaMoO4
| Autor: | M. V. Morozova, Diana Piankova, Z. A. Mikhaylovskaya, S. A. Petrova, Isaac Abrahams, Nadezda V. Tarakina, E. S. Buyanova |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Neutron diffraction chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Bismuth Inorganic Chemistry Tetragonal crystal system chemistry.chemical_compound Crystallography chemistry Scheelite X-ray crystallography Materials Chemistry Ceramics and Composites Photocatalysis Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Solid State Chemistry |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2020.121627 |
| Popis: | The Ca1−3xBi2xФxMoO4 system (0.025 ≤ x ≤ 0.30, where Ф represents cation vacancies) was synthesized and studied. The 0.025 = x ≤ 0.15 compositions show a tetragonal defect scheelite structure. Powder X-ray and neutron diffraction patterns for compositions with 0.15 sup ≈ √5a, csup ≈ c where a and c are the tetragonal scheelite cell parameters. Transmission electron microscopy shows that Ca0.4Bi0.4MoO4, crystals consist of three crystallographic domains: (1) defect scheelite; (2) tetragonal superlattice and (3) incommensurately modulated. Photocatalytic properties were studied using Rhodamine B water solutions under UV light. Catalytic activity increases with increasing Bi content. The conductivity of 0.15 −7 to 10−8 S cm−1 in the range 500–650 °C, while compositions in the range 0.025 = x ≤ 0.15 show conductivity values from 10−3 to 10−8 S cm−1 from 500 to 800 °C. |
| Databáze: | OpenAIRE |
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