The effect of potassium chloride on BiVO4 morphology and photocatalysis
| Autor: | Keiichi N. Ishihara, Takaya Ogawa, Sopheak Meng, Hideyuki Okumura |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Chemistry
Potassium chemistry.chemical_element Crystal growth 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Inorganic Chemistry chemistry.chemical_compound Materials Chemistry Ceramics and Composites Rhodamine B Photocatalysis Hydrothermal synthesis Physical and Theoretical Chemistry Absorption (chemistry) 0210 nano-technology Photodegradation Nuclear chemistry Monoclinic crystal system |
| Zdroj: | Journal of Solid State Chemistry. 302:122291 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2021.122291 |
| Popis: | The monoclinic BiVO4 was synthesized via a facile one-pot hydrothermal synthesis. KCl concentration in the precursor greatly influences the crystal growth, morphology, and absorption properties of BiVO4 attributed to the effect of Clˉ ions on the formation of BiOCl intermediate and preferential growth of BiVO4 crystals along {010} planes. The photocatalytic property of BiVO4 is accordingly altered based on the KCl content. The “shuriken-like” BiVO4 prepared with 3 mmol of KCl exhibits the highest photocatalytic activity among our samples. Its photocatalytic rhodamine B degradation efficiency could reach 94.7% after 4 h of visible-light irradiation. The degradation efficiency only decreased to 90.8% after four runs of 4 h irradiation. The photodegradation rate with the shuriken-like BiVO4 is around 2.3 times higher than that with the rod-like BiVO4 prepared without KCl, owing to its highest relative intensity ratio of (040) to ( 1 ¯ 21 ) plane, which maximizes the exposed active {010} facets of BiVO4. |
| Databáze: | OpenAIRE |
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