Facile one-pot solvothermal method to synthesize solar active Bi2WO6 for photocatalytic degradation of organic dye
| Autor: | Kian Mun Lee, Soon Wei Chook, Thomas C.-K. Yang, Joon Ching Juan, Magdeline Tze Leng Lai, Siewhui Chong, Chin Wei Lai |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Oxygen 0104 chemical sciences Bismuth chemistry.chemical_compound Tungstate chemistry Mechanics of Materials Organic dye Materials Chemistry Photocatalysis Crystallite Irradiation 0210 nano-technology Photodegradation |
| Zdroj: | Journal of Alloys and Compounds. 801:502-510 |
| ISSN: | 0925-8388 |
| Popis: | The release of organic contaminant such as dye has become a major environmental issue. Bismuth tungstate (Bi2WO6) is one of the perovskites-based photocatalysts shows a great ability to photodegrade organic dye under solar light irradiation. In this study, Bi2WO6 with different physicochemical properties was synthesized using one-pot solvothermal method by varying the reaction temperature ranging from 120 °C to 180 °C. The Bi2WO6 synthesized at 140 °C (BWO-140) exhibited the highest photocatalytic activity (8.0 × 10−3 min−1) toward Erichrome Black T (EBT) dye. The superiority of Bi2WO6 photodegradation was mainly attributed to a synergistic effects of large surface area, small crystallite size, low electron recombination, and the presence of oxygen vacancies. Moreover, it was interesting to note that the BWO-140 could be reused for six consecutive cycles, without any significant deterioration. It was demonstrated that, photogenerated hole (h+) was the most important active species of Bi2WO6 to initiate the photocatalytic reaction. |
| Databáze: | OpenAIRE |
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