Ce3+ self-doped CeOx/FeOCl: an efficient Fenton catalyst for phenol degradation under mild conditions†,Dalton Transactions

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Ce3+ self-doped CeOx/FeOCl: an efficient Fenton catalyst for phenol degradation under mild conditions†
Dalton Transactions ( IF 3.5 ) Pub Date : 2019-02-11 00:00:00 , DOI: 10.1039/c8dt04269a
Jian Zhang _{1,

2,

3,

4} , Mengxue Yang _{1,

2,

3,

4} , Ye Lian _{1,

2,

3,

4} , Mingliang Zhong _{1,

2,

3,

4} , Jingquan Sha _{1,

2,

3,

4} , Guodong Liu _{1,

2,

3,

4} , Xinfu Zhao _{5,

6,

7,

8,

9} , Shaojie Liu _{8,

9,

10,

11}

Affiliation

Herein, a novel Ce³⁺ self-doped CeO_x/FeOCl composite was successfully prepared by a facile method for the first time, which showed remarkable catalytic activity as a Fenton catalyst in the degradation of phenol under the conditions of a neutral solution, room temperature and natural light. In CeO_x/FeOCl, 5.23% CeO_x is the optimal condition, and the degradation constant (k) of CeO_x/FeOCl is greater than that of FeOCl by a factor of 10.8. CeOCl in the composite plays a more important role than CeO₂, which greatly increases the production of ˙OH radicals. Furthermore, the Ce-doping in FeOCl accelerates the separation efficiency of the photogenerated electron–hole pairs. The increased surface area and surface potential of CeO_x/FeOCl than those of FeOCl effectively promote the adsorption of phenol, which is 4.05 times that of FeOCl. According to the DFT calculations, the Ce-doping in FeOCl enhances the structural stability by increasing the strength of the chemical bonds. The adsorption of H₂O₂ with Ce³⁺ is energetically favorable, which promotes the production of ˙OH radicals. A synergistic mechanism for the enhanced catalytic performance of CeO_x/FeOCl is proposed.

中文翻译：

Ce ³⁺自掺杂CeO _x / FeOCl：在温和条件下用于苯酚降解的高效Fenton催化剂†

本文首次通过一种简便的方法成功制备了一种新型的Ce ³⁺自掺杂CeO _x / FeOCl复合材料，在中性溶液，室温条件下，该化合物作为Fenton催化剂对苯酚的降解具有显着的催化活性。温度和自然光。在CeO _x / FeOCl中，最佳条件为5.23％CeO _x，并且CeO _x / FeOCl的降解常数（k）比FeOCl大10.8倍。CeOCl在复合材料中的作用比CeO ₂更重要，大大增加了˙OH自由基的产生。此外，FeOCl中的Ce掺杂可加速光生电子-空穴对的分离效率。CeO _x / FeOCl比FeOCl增加的表面积和表面电势有效地促进了苯酚的吸附，这是FeOCl的4.05倍。根据DFT计算，FeOCl中的Ce掺杂通过增加化学键的强度来增强结构稳定性。H的吸附₂ ö ₂被Ce ³⁺是积极有利的，这促进了生产OH自由基。提出了增强CeO _x / FeOCl催化性能的协同机理。

更新日期：2019-02-11

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