期刊
RSC ADVANCES
卷 11, 期 11, 页码 6284-6291出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra08359c
关键词
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资金
- National Key R&D Program of China [2016YFA0401803]
- National Natural Science Foundation of China (NSFC) [11574316, U1532155]
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SLH011]
- Key Lab of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences [PECL2019QN004]
This study found that a relatively lower magnetic field can enhance the photodegradation efficiency of commercial TiO2, while a higher magnetic field may suppress the efficiency slightly. The magnetic field effect is also dependent on the settling state of the reaction solution, and it is a ubiquitous phenomenon in the photocatalytic degradation process.
In this work, by taking commercial P25 hydrophilic titanium dioxide (TiO2) as a photocatalyst, the magnetic field effect (MFE) on the photodegradation rate of methyl orange is studied. It is found that a relatively lower magnetic field B = 0.28 T can efficiently enhance the photodegradation efficiency of commercial TiO2 by 24%. However, the photodegradation efficiency of commercial TiO2 will be suppressed slightly by 7% under a magnetic field of 0.5 T. Moreover, such MFE on the photocatalyst is dependent on the settling state of the reaction solution. Additional experiments on the degradation of other pollutants (methylene blue) and with other photocatalysts (g-C3N4) indicate that the MFE is a ubiquitous phenomenon in the photocatalytic degradation process. These observations suggest that the magnetic field can be taken as an efficient strategy to regulate the catalytic process of commercial catalysts and improve the catalytic efficiency.
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