缺陷工程增强了CeO纳米棒对光催化氧化甲基蓝的电荷分离能力。
Defect Engineering Enhances the Charge Separation of CeO Nanorods toward Photocatalytic Methyl Blue Oxidation.
作者信息
Yang Jindong, Xie Ning, Zhang Jingnan, Fan Wenjie, Huang Yongchao, Tong Yexiang
机构信息
MOE Laboratory of Bioinorganic and Synthetic Chemistry the Key Lab of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.
Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou 510006, China.
出版信息
Nanomaterials (Basel). 2020 Nov 21;10(11):2307. doi: 10.3390/nano10112307.
Defect-rich photocatalytic materials with excellent charge transfer properties are very popular. Herein, Sm-doped CeO nanorods were annealed in a N atmosphere to obtain the defective Sm-doped CeO photocatalysts (Vo-Sm-CeO). The morphology and structure of Vo-Sm-CeO were systematically characterized. The Vo-Sm-CeO nanorods demonstrated an excellent photodegradation performance of methyl blue under visible light irradiation compared to CeO nanorods and Sm-CeO. Reactive oxygen species including OH, ·O, 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 CeO nanorods, benefiting photogenerated electrons being removed from the surface reactive sites, resulting in the superior performance.
具有优异电荷转移特性的富缺陷光催化材料备受关注。在此，将Sm掺杂的CeO纳米棒在N气氛中退火，以获得有缺陷的Sm掺杂CeO光催化剂（Vo-Sm-CeO）。对Vo-Sm-CeO的形貌和结构进行了系统表征。与CeO纳米棒和Sm-CeO相比，Vo-Sm-CeO纳米棒在可见光照射下对甲基蓝表现出优异的光降解性能。通过电子自旋共振光谱证实，包括·OH、·O和h在内的活性氧物种在污染物去除过程中起关键作用。掺杂Sm提高了CeO纳米棒的导电性，有利于光生电子从表面反应位点移除，从而产生优异的性能。
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