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Defect Engineering Enhances the Charge Separation of CeO2 Nanorods toward Photocatalytic Methyl Blue Oxidation.


ABSTRACT: Defect-rich photocatalytic materials with excellent charge transfer properties are very popular. Herein, Sm-doped CeO2 nanorods were annealed in a N2 atmosphere to obtain the defective Sm-doped CeO2 photocatalysts (Vo-Sm-CeO2). The morphology and structure of Vo-Sm-CeO2 were systematically characterized. The Vo-Sm-CeO2 nanorods demonstrated an excellent photodegradation performance of methyl blue under visible light irradiation compared to CeO2 nanorods and Sm-CeO2. Reactive oxygen species including OH, ·O2-, and h+ were confirmed to play a pivotal role in the removal of pollutants via electron spin resonance spectroscopy. Doping Sm enhances the conductivity of CeO2 nanorods, benefiting photogenerated electrons being removed from the surface reactive sites, resulting in the superior performance.

SUBMITTER: Yang J 

PROVIDER: S-EPMC7700514 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Defect Engineering Enhances the Charge Separation of CeO<sub>2</sub> Nanorods toward Photocatalytic Methyl Blue Oxidation.

Yang Jindong J   Xie Ning N   Zhang Jingnan J   Fan Wenjie W   Huang Yongchao Y   Tong Yexiang Y  

Nanomaterials (Basel, Switzerland) 20201121 11


Defect-rich photocatalytic materials with excellent charge transfer properties are very popular. Herein, Sm-doped CeO<sub>2</sub> nanorods were annealed in a N<sub>2</sub> atmosphere to obtain the defective Sm-doped CeO<sub>2</sub> photocatalysts (Vo-Sm-CeO<sub>2</sub>). The morphology and structure of Vo-Sm-CeO<sub>2</sub> were systematically characterized. The Vo-Sm-CeO<sub>2</sub> nanorods demonstrated an excellent photodegradation performance of methyl blue under visible light irradiation co  ...[more]

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