Journal
MICROMACHINES
Volume 10, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/mi10090557
Keywords
carbon quantum dots; CQDs; Ag3PO4; BiPO4; photodegradation activity; synergistic effect; photocatalytic mechanism
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Funding
- National Natural Science Foundation of China [51662027]
- Chongqing basic research and frontier exploration (general project) [cstc2019jcyj-msxm1327]
- Major Cultivation Projects of Chongqing Three Gorges University [18ZDPY01]
- University Scientific Research Project in Gansu Province [2018A-242]
- Study on the Detection of UWB High Range Resolution Radar Target project of the Science and Technology Research Program of the Chongqing Education Commission of China [KJ1601004]
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A carbon quantum dot (CQDs)/Ag3PO4/BiPO4 heterostructure photocatalyst was constructed by a simple hydrothermal synthesis method. The as-prepared CQDs/Ag3PO4/BiPO4 photocatalyst has been characterized in detail by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, and photoelectrochemical measurements. It is demonstrated that the CQDs/Ag3PO4/BiPO4 composite is constructed by assembling Ag3PO4 fine particles and CQDs on the surface of rice-like BiPO4 granules. The CQDs/Ag3PO4/BiPO4 heterostructure photocatalyst exhibits a higher photocatalytic activity for the degradation of the rhodamine B dye than that of Ag3PO4, BiPO4, and Ag3PO4/BiPO4. The synergistic effects of light absorption capacity, band edge position, separation, and utilization efficiency of photogenerated carriers play the key role for the enhanced photodegradation of the rhodamine B dye.
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