期刊
MATERIALS
卷 13, 期 17, 页码 -出版社
MDPI
DOI: 10.3390/ma13173811
关键词
kaolin; CeO2; g-C3N4; visible-light irradiation; photocatalytic degradation
类别
资金
- National Natural Science Foundation of China [NSFC 41972261]
Herein, novel ternary kaolin/CeO2/g-C(3)N(4)composite was prepared by sol-gel method followed by hydrothermal treatment. The self-assembled 3D sandwich structure consisting of kaolin, CeO(2)and g-C(3)N(4)nanosheets, was systematically characterized by appropriate techniques to assess its physicochemical properties. In the prerequisite of visible-light irradiation, the removal efficiency of ciprofloxacin (CIP) over the kaolin/CeO2/g-C(3)N(4)composite was about 90% within 150 min, 2-folds higher than those of pristine CeO(2)and g-C3N4. The enhanced photocatalytic activity was attributed to the improved photo-induced charge separation efficiency and the large specific surface area, which was determined by electrochemical measurements and N(2)physisorption methods, respectively. The synergistic effect between the kaolin and CeO2/g-C(3)N(4)heterostructure improved the photocatalytic performance of the final solid. The trapping and electron paramagnetic resonance (EPR) experiments demonstrated that the hole (h(+)) and superoxide radicals (center dot O-2(-)) played an important role in the photocatalytic process. The photocatalytic mechanism for CIP degradation was also proposed based on experimental results. The obtained results revealed that the kaolin/CeO2/g-C(3)N(4)composite is a promising solid catalyst for environmental remediation.
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