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Tong Z, Wang H, An W, Li G, Cui W, Hu J. FeCu bimetallic metal organic frameworks photo-Fenton synergy efficiently degrades organic pollutants: Structure, properties, and mechanism insight. J Colloid Interface Sci 2024; 661:1011-1024. [PMID: 38335786 DOI: 10.1016/j.jcis.2024.01.212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 01/24/2024] [Accepted: 01/30/2024] [Indexed: 02/12/2024]
Abstract
The high ion leaching, low photogenerated charge separation efficiency, and slow metal valence cycling of Fe-based metal organic frameworks (MOFs) have limited their application in the deep treatment of organic pollutants. Herein, FeCu bimetallic MOFs (FeCuBDC) were synthesized using a modified solvothermal method, and a coupled photo-Fenton degradation system was successfully constructed. Degradation performance tests showed that FeCuBDC could efficiently degrade 99.3% ± 0.1% of 50 mg/L phenol within 40 min. The reaction rate constants of the photo-Fenton system were 11.0 and 64.7 times higher than those of the single Fenton reaction and photocatalysis, respectively. FeCuBDC also exhibits good cycling stability, degradation generalization, and excellent photoelectric catalytic properties. Such a considerable enhancement in the overall performance pertains to the following. First, the introduction of Cu into Fe-MOFs not only improves the crystallinity and stability, but also reduces the band gap value, increases the absorption capacity of visible light, and promotes the generation of photogenerated carriers. Second, the FeCu in MOFs are all mixed valence. Initially, the high-valence FeCu captures photogenerated electrons and promotes photogenerated charge separation and transfer. Then, the low-valence FeCu adsorbs and decomposes H2O2, accelerating the valence cycling of the bimetallic sites. The core of the reaction mechanism is that FeCuBDC effectively promotes the photo-Fenton synergy.
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Affiliation(s)
- Zhenhao Tong
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Huan Wang
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Weijia An
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Guangyue Li
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China.
| | - Wenquan Cui
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Jinshan Hu
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China.
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Dong Y, Wang D, Zhu Y, Wang Q, Liu G, Yan Q, Liu Y, Chen Q, Ma D, Zhang G, Xin S, Xin Y. In-situ production and activation of H 2O 2 over hydroxyapatite modified CuFeO 2 for self-sufficient heterogeneous photo-Fenton degradation of doxycycline hydrochloride. J Colloid Interface Sci 2024; 658:286-300. [PMID: 38109816 DOI: 10.1016/j.jcis.2023.12.082] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/07/2023] [Accepted: 12/12/2023] [Indexed: 12/20/2023]
Abstract
The self-sufficient heterogeneous photo-Fenton (SH-PF) system was constructed for doxycycline hydrochloride (DOH) degradation with hydroxyapatite (Hap) modified CuFeO2 (Hap/CuFeO2) composites through H2O2 in-situ production. The modification of Hap could improve the specific surface area, visible-light response, light conversion efficiency, photoelectron lifetime and oxygen vacancies (OVs) of CuFeO2, which was conducive to H2O2 production and DOH degradation in SH-PF system. Notably, Hap/CuFeO2 fabricated with 0.5 g Hap (Hap/CuFeO2-0.5) displayed more superior performance for DOH degradation compared to other synthesized catalysts. The Hap/CuFeO2-0.5 load and initial solution pH for DOH degradation in SH-PF system were optimized, and the Hap/CuFeO2-0.5 had good reusability and stability. The •OH was the main active species for DOH degradation, and the facilitation effect of •O2- and photoelectrons on DOH degradation was associated with the H2O2 production in the present work. In addition, the capture of photogenerated holes suppressed the recombination of photogenerated carriers, elevating the production of photoelectrons and thereby enhancing H2O2 production and DOH degradation. The degradation pathways for DOH were proposed and the comprehensive toxicities of DOH were relieved after degradation in SH-PF system.
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Affiliation(s)
- Yanan Dong
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Dong Wang
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Yingchen Zhu
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Qianwen Wang
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Guocheng Liu
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Qinghua Yan
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Yucan Liu
- School of Civil Engineering, Yantai University, Yantai 264005, China
| | - Qinghua Chen
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Dong Ma
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Guangshan Zhang
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
| | - Shuaishuai Xin
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China.
| | - Yanjun Xin
- Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China.
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