Oxygen Vacancy Engineering and Constructing Built-In Electric Field in Fe-g-C3N4/Bi2MoO6 Z-Scheme Heterojunction for Boosting Photo-Fenton Catalytic Degradation Performance of Tetracycline,Small

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Oxygen Vacancy Engineering and Constructing Built-In Electric Field in Fe-g-C3N4/Bi2MoO6 Z-Scheme Heterojunction for Boosting Photo-Fenton Catalytic Degradation Performance of Tetracycline
Small ( IF 13.0 ) Pub Date : 2024-09-09 , DOI: 10.1002/smll.202406125
Zhanshou Wang ₁ , Shuang Meng _{1,

2} , Jinlong Li _{1,

2} , Dongxuan Guo _{1,

2} , Shanshan Fu _{1,

2} , Dantong Zhang _{1,

2,

3} , Xue Yang _{1,

2} , Guozhe Sui _{1,

2}

Affiliation

A novel Fe-g-C₃N₄/Bi₂MoO₆ (FCNB) Z-scheme heterojunction enriched with oxygen vacancy is constructed and employed for the photo-Fenton degradation of tetracycline (TC). The 2% FCNB demonstrates prominent catalytic performance and mineralization efficiency for TC wastewater, showing activity of 8.20 times greater than that of pure photocatalytic technology. Density-functional theory (DFT) calculations and degradation experiments confirm that the formation of Fe-N₄ sites induces spin-polarization in the material, and the difference in Fermi energy levels results in the formation of built-in electric field at the contact interface, which facilitates the continuous generation and migration of photogenerated carriers to address the issue of insufficient cycling power of Fe (III)/Fe (II).The reactive radicals persistently target the extremely reactive sites anticipated by the Fukui function, causing the mineralization of TC molecules into “non-toxic” compounds through processes of hydroxylation, demethylation, and deamidation. This work holds significant importance in the domain of eliminating organic pollutants from water.

中文翻译：

Fe-g-C3N4/Bi2MoO6 z型异质结氧空位工程与构建内置电场，提高四环素光芬顿催化降解性能

构建了一种富含氧空位的新型 Fe-g-C₃N₄/Bi₂MoO₆ （FCNB） Z 型异质结，并将其用于四环素（TC）的光芬顿降解。2% FCNB 对 TC 废水表现出突出的催化性能和矿化效率，显示出比纯光催化技术高 8.20 倍的活性。密度泛函理论（DFT）计算和降解实验证实，Fe-N₄ 位点的形成会诱导材料中的自旋极化，费米能级的差异导致在接触界面处形成内置电场，这有利于光生载流子的连续产生和迁移，以解决 Fe （III）/Fe （II）循环功率不足的问题。反应性自由基持续靶向 Fukui 函数预期的极强反应性位点，导致 TC 分子通过羟基化、去甲基化和脱酰胺化过程矿化成“无毒”化合物。这项工作在消除水中的有机污染物领域具有重要意义。

更新日期：2024-09-09

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