电炉灰提锌尾渣制备光催化剂iron oxides@HTCC用于亚甲基蓝降解：光催化机理研究

薛阳; 刘晓明; 张娜; 邵阳; 徐春保

doi:10.1007/s12613-023-2723-5

Volume 30 Issue 12

Dec. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(12): 2364-2374

Yang Xue, Xiaoming Liu, Na Zhang, Yang Shao, and Chunbao (Charles) Xu, Enhanced photocatalytic performance of iron oxides@HTCC fabricated from zinc extraction tailings for methylene blue degradation: Investigation of the photocatalytic mechanism, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2364-2374. https://doi.org/10.1007/s12613-023-2723-5

Cite this article as:

Yang Xue, Xiaoming Liu, Na Zhang, Yang Shao, and Chunbao (Charles) Xu, Enhanced photocatalytic performance of iron oxides@HTCC fabricated from zinc extraction tailings for methylene blue degradation: Investigation of the photocatalytic mechanism, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2364-2374. https://doi.org/10.1007/s12613-023-2723-5

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研究论文

电炉灰提锌尾渣制备光催化剂iron oxides@HTCC用于亚甲基蓝降解：光催化机理研究

1)
北京科技大学绿色低碳钢铁冶金全国重点实验室，北京 100083，中国
2)
北京科技大学冶金与生态工程学院，北京 100083，中国
3)
中国地质大学材料科学与工程学院，北京 100083，中国
4)
Department of Chemical & Biochemical Engineering, Western University, London, ON N6A 5B9, Canada

通讯作者:
刘晓明    E-mail: liuxm@ustb.edu.cn

张娜    E-mail: nazhang@cugb.edu.cn

徐春保    E-mail: cxu6@uwo.ca

文章亮点

(1) 深入探究了iron oxides@HTCC在光芬顿体系中的催化性能。

(2) 全面分析了iron oxides@HTCC的稳定性、可回收性和重复利用性。

(3) 通过光电化学测试和第一性原理计算揭示了在可见光激发下iron oxides@HTCC催化活性的增强机理。

中文摘要

光催化技术是解决水污染问题的有效方法之一，尤其在染料废水的处理领域。然而，高效光催化剂通常价格昂贵并且具有重金属污染的风险。本研究团队利用电炉灰氧压硫酸浸出所得的提锌尾渣和碳水化合物共水热技术制备了复合催化剂iron oxides@HTCC。在该过程中碳水化合物水热碳化生成富含含氧基团的水热炭(HTCC)，提锌尾渣中的Fe(OH)SO₄水热反应转化为Fe₂O₃，同时HTCC还原Fe₂O₃产生了磁性铁氧体，并且该磁性铁氧体与HTCC复合改善了其内部sp²杂化结构从而提高了其催化活性。本文利用亚甲基蓝对iron oxides@HTCC的光催化性能进行了验证，并通过理论计算和光电化学测试研究了其催化活性增强机理。Iron oxides@HTCC在光催化和类芬顿反应之间显示出优异的协同作用。Iron oxides@HTCC可以被可见光激发产生光电子和空穴，它们与H₂O₂反应产生了具有高氧化活性的·OH。Iron oxides@HTCC对亚甲基蓝的去除效率是HTCC的2.86倍，这主要得益于氧化铁的改性使其禁带宽度变窄，改善了其光激发活性，同时sp²杂化结构的弯曲提升了其内部光电子的转移效率。此外，该催化剂在宽pH范围内均表现出较高的催化活性，并且在循环使用四次后该催化剂对亚甲基蓝的去除率仍高于95%。Iron oxides@HTCC的制备可以为含铁尾渣的利用和可见光催化剂的制备提供新的思路。

关键词:

Research Article

Enhanced photocatalytic performance of iron oxides@HTCC fabricated from zinc extraction tailings for methylene blue degradation: Investigation of the photocatalytic mechanism

+ Author Affiliations

1)
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
2)
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
3)
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
4)
Department of Chemical & Biochemical Engineering, Western University, London, ON N6A 5B9, Canada

Xiaoming Liu is a youth editorial board member for IJMMM and is not involved in the editorial review or the decision to publish this article. All authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper..
The online version contains supplementary material available at https://doi.org/10.1007/s12613-023-2723-5

Corresponding authors:
Xiaoming Liu    E-mail: liuxm@ustb.edu.cn

Na Zhang    E-mail: nazhang@cugb.edu.cn

Chunbao (Charles) Xu    E-mail: cxu6@uwo.ca
Received: 26 March 2023; Revised: 7 August 2023; Accepted: 9 August 2023; Available online: 10 August 2023

Abstract

Abstract

Photocatalytic processes are efficient methods to solve water contamination problems, especially considering dyeing wastewater disposal. However, high-efficiency photocatalysts are usually very expensive and have the risk of heavy metal pollution. Recently, an iron oxides@hydrothermal carbonation carbon (HTCC) heterogeneous catalyst was prepared by our group through co-hydrothermal treatment of carbohydrates and zinc extraction tailings of converter dust. Herein, the catalytic performance of the iron oxides@HTCC was verified by a non-biodegradable dye, methylene blue (MB), and the catalytic mechanism was deduced from theoretical simulations and spectroscopic measurements. The iron oxides@HTCC showed an excellent synergy between photocatalysis and Fenton-like reactions. Under visible-light illumination, the iron oxides@HTCC could be excited to generate electrons and holes, reacting with H₂O₂ to produce $\cdot\mathrm{O}\mathrm{H}$ radicals to oxidize and decompose organic pollutants. The removal efficiency of methylene blue over iron oxides@HTCC at 140 min was 2.86 times that of HTCC. The enhanced catalytic performance was attributed to the advantages of iron oxides modification: (1) promoting the excitation induced by photons; (2) improving the charge transfer. Furthermore, the iron oxides@HTCC showed high catalytic activity in a wide pH value range of 2.3–10.4, and the MB removal efficiency remained higher than 95% after the iron oxides@HTCC was recycled 4 times. The magnetically recyclable iron oxides@HTCC may provide a solution for the treatment of wastewater from the textile industry.
- photocatalysis;
- photo-Fenton reaction;
- methylene blue degradation;
- tailings utilization

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电炉灰提锌尾渣制备光催化剂iron oxides@HTCC用于亚甲基蓝降解：光催化机理研究

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Enhanced photocatalytic performance of iron oxides@HTCC fabricated from zinc extraction tailings for methylene blue degradation: Investigation of the photocatalytic mechanism

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