SiO2-stabilized Bi nanoparticles: A high active and stable visible light photocatalyst
| Autor: | Jingzhe Zhao, Shu Wang, Yan Zhao, Yawen Li, Souvanthong Bouasavanh |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen Scanning electron microscope Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Colloid and Surface Chemistry chemistry Chemical engineering Transmission electron microscopy Differential thermal analysis Photocatalysis Rhodamine B 0210 nano-technology Visible spectrum |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 567:112-120 |
| ISSN: | 0927-7757 |
| DOI: | 10.1016/j.colsurfa.2019.01.030 |
| Popis: | A SiO2-coated Bi nanoparticle structure in 40–60 nm with high activity and stability was designed by a liquid phase chemical reduction method. The effect of SiO2 layer on high active Bi nanoparticles was studied by X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, and thermo-gravimetric and differential thermal analysis characterizations. The SiO2 layer effectively enhanced the stability of Bi core without having negative effect on its activity. The as-prepared Bi@SiO2 nanoparticles showed high activity and recycling stability both in photocatalytic degradation of pollutant (rhodamine B and bisphenol A, respectively) and hydrogen exhalation reaction (HER). The photocatalytic degradation mechanism of Bi@SiO2 nanoparticles under visible light irradiation was discussed. The porous structure of SiO2 layer performed transport channel for electrons and active species, and enhanced the plasmonic photocatalytic effect of Bi. |
| Databáze: | OpenAIRE |
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