Improved photocatalytic activities of recyclable porous Fe2O3 nanotubes by modifying with nano-sized SiO2 and g-C3N4 for degrading 2-chlorophenol
| Autor: | Yangyang Zhu, Tianwei Dou, Wenyu E, Liqiang Jing, Jingqiang Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Photocurrent
Materials science Mechanical Engineering Nanoparticle Condensed Matter Physics Electrospinning law.invention chemistry.chemical_compound Chemical engineering chemistry Mechanics of Materials law 2-Chlorophenol Photocatalysis Degradation (geology) General Materials Science Electron paramagnetic resonance Porosity |
| Zdroj: | Materials Research Bulletin. 142:111416 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2021.111416 |
| Popis: | It is highly desired to fabricate efficient α-Fe2O3-based photocatalysts with recyclable feature for pollutants degradation. Herein, porous α-Fe2O3 nanotubes with high photocatalytic activity for degrading 2-chlorophenol (2-CP) have been successfully synthesized by a phase separation electrospinning process, with a pipe diameter of about 200 nm . The photoactivity is greatly improved by in-situ introducing SiO2, attributed to the increased surface area by decreasing the size of nanoparticles shell from ~ 30 to 15 nm. Furthermore, the photoactivity of SiO2 modified α-Fe2O3 is further improved by coupling with porous g-C3N4 nanosheets, ascribed to the promoted charge separation by the newly accepted S-scheme charge transfer mainly based on the EPR tests and photocurrent action spectra. Interestingly, the optimized α-Fe2O3-based nanotubes exhibit ~ 4-time improvement of the kinetic rate constant in 2-CP degradation compared with the reported α-Fe2O3 nanoparticles, with good recyclability by self-sediment. |
| Databáze: | OpenAIRE |
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