Microwave-assisted synthesis of 3D Bi2MoO6 microspheres with oxygen vacancies for enhanced visible-light photocatalytic activity
Literature Information
Publication Date
2020-11-04
DOI
10.1039/D0PP00247J
Impact Factor
0
Authors
Chengjuan Huang, Shuaishuai Ma, Yuqing Zong, Jiandong Gu, Jinjuan Xue, Mingxin Wang
View Original
Abstract
Oxygen vacancies (OVs) defects in metal oxide-based photocatalysts play a crucial role in improving the charge carrier separation efficiencies to enhance the photocatalytic performances. In this work, OVs were introduced in 3D Bi2MoO6 microspheres through a facile and fast microwave-assisted method via the modulation of tetramethylethylenediamine (TMEDA). EPR, Raman and XPS results demonstrated that large amounts of oxygen vacancies were formed on the surface of BMO microspheres. The photocatalytic properties of the samples were studied by degradation of tetracycline (TC) under visible light. The optimal Bi2MoO6 with OVs exhibited optimum photocatalytic activity, and the degradation rate was 7.0 times higher than that of pristine Bi2MoO6. This enhancement can be attributed to the 3D structure furnishing more surface active sites and suitable OVs defects favoring the electron–hole separation. Moreover, the defective Bi2MoO6 microspheres exhibit high stability because the photocatalytic activity remains almost unchanged after 5 cycles, making them favorable for practical applications. Finally, a possible visible light photocatalysis mechanism for the degradation of TC was tentatively proposed.
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Source Journal
Photochemical & Photobiological Sciences
CiteScore:
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Photochemical & Photobiological Sciences (PPS) is a monthly journal for the publication of original research papers (Full papers), Reviews, Perspectives, Communications and Technical notes of current interest in the areas of photochemistry and photobiology. The journal also contains a Forum section. PPS is published by Springer and is the official journal of the European Society for Photobiology (ESP) and the European Photochemistry Association (EPA). The journal publishes articles on the interaction of light with molecules, supramolecular systems or biological matter. Topics include, but are not limited to the following. Applied photochemistry Atmospheric photochemistry Bioluminescence Chronobiology DNA repair Energy transfer Environmental photobiology Environmental photochemistry Excited state properties Laser photochemistry Luminescence Mechanistic photochemistry Organic and inorganic photochemistry Photocarcinogenesis Photochemical kinetics Photochemistry of biomolecules Photochemotherapy Photochromism Photodegradation Photodermatology Photoelectrochemistry Photoimaging Photoimmunology Photomedicine Photomorphogenesis Photomovement Photoprotection Photoreception Photosensitisation Photosynthesis Phototechnology Phototherapy Phototoxicity Solar energy utilisation Spectroscopy Spectroscopy of biological systems Supramolecular photochemistry Synthetic photochemistry Theoretical photochemistry UV and visible radiation effects and vision
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