Modifying defect States in CeO2 by Fe doping: A strategy for low-temperature catalytic oxidation of toluene with sunlight.,Journal of Hazardous Materials

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Modifying defect States in CeO2 by Fe doping: A strategy for low-temperature catalytic oxidation of toluene with sunlight.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-22 , DOI: 10.1016/j.jhazmat.2020.122182
Chunli Jiang ₁ , Hao Wang ₁ , Yongqing Wang ₁ , Can Xue ₂ , Zujin Yang ₂ , Changlin Yu ₃ , Hongbing Ji ₄

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Highly efficient, low cost and green ways to eliminate volatile organic compounds (VOCs), which are quite desirable due to the ever-increasing environmental issues. Photothermal catalytic oxidation provides a pathway for solving these problems, but its application is always limited by lack of low-cost and active catalysts. Herein, this limitation is overcome by using doping to refine defect states. As a proof of concept, hierarchical CeO2 nanorods are employed as a model material for subtle Fe doping. The results reveal that the oxygen defects facilitate activation of the OO bond and the migration and separation of the photogenerated charge carriers. By virtue of such favorable synergistic effect, a satisfactory toluene conversion (>98 %) was obtained. This work provides new insights into the design of highly effective catalysts and the construction of an economically viable process for VOC elimination.

中文翻译：

通过铁掺杂修饰CeO2中的缺陷态：一种在阳光下低温催化氧化甲苯的策略。

高效，低成本和绿色的消除挥发性有机化合物（VOC）的方法，由于日益严重的环境问题，这是非常理想的。光热催化氧化提供了解决这些问题的途径，但是其应用总是受到缺乏低成本和活性催化剂的限制。在此，通过使用掺杂细化缺陷状态来克服该限制。作为概念证明，采用分级CeO2纳米棒作为微妙的Fe掺杂的模型材料。结果表明，氧缺陷促进了OO键的活化以及光生载流子的迁移和分离。由于这种有利的协同作用，获得了令人满意的甲苯转化率（> 98％）。

更新日期：2020-01-22

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