Synthesis of CeO2 nanoparticles by sacrificial Mg powder with abundant oxygen vacancies and efficiently photocatalytic activity

•Single crystal CeO2 nanoparticles were synthesized by a novel sacrificial metal method.•The ultrasonic treatment is beneficial to generate oxygen vacancies and lower particle size.•The CeO2 nanoparticles exhibits superior photocatalytic degradation of tetracycline. A novel sacrificial metal method...

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