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Gao Y, Li H, Zhang R, Zeng M, Hu J, Lu J, Ma J. Accelerated tetracycline hydrochloride mineralisation by Fe@CeO 2-x/MgO complex metal oxides via ozone-catalysed interfacial reactions: The role of oxygen vacancies and multivalent metal cycling. J Colloid Interface Sci 2025; 696:137885. [PMID: 40393134 DOI: 10.1016/j.jcis.2025.137885] [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: 02/14/2025] [Revised: 05/13/2025] [Accepted: 05/13/2025] [Indexed: 05/22/2025]
Abstract
Heterogeneous catalytic ozonation (HCO) shows promising potential for degrading emerging contaminants, but its mineralisation rate needs further improvement due to insufficient electron transfer. To address this limitation, an efficient HCO system was developed by synthesising a Fe@CeO2-x/MgO multi-metal catalyst via an isomorphous substitution strategy, which was then coupled with ozone (O3) for efficient tetracycline hydrochloride (TCH) mineralisation. The results indicated that TCH mineralisation rate reached 0.0204 min-1 in the O3/0.5Fe@CeO2-x/MgO system, 2.43 fold times higher than that of O3 alone. This enhanced mineralisation performance can be attributed to iron substitution, introduction of numerous Lewis acid sites, and shortening of Ce-O bond length, which facilitated the migratory conversion between oxygen vacancies (OVs) and surface lattice oxygen, as well as improved adsorption and electron transfer between Fe@CeO2-x/MgO and O3. Mechanistic analysis revealed that OVs directly activate oxygen to form singlet oxygen and then reacted with O3 to generate superoxide radicals, that subsequently reacted with O3 to form hydroxyl radical (·OH) and recyclable OVs. In addition, O3 could oxidise Fe(Ⅱ) and Ce(Ⅲ) to obtain ·OH through electron transfer. Similarly, intermediate hydroperoxyl could reduce Fe(Ⅲ) and Ce(Ⅳ) to ensure continued free radical production. As a result of enhanced TCH mineralization performance, both toxicity of intermediates and disinfection by-products (DBPs) formation potential were gradually reduced. Notably, DBPs formation potential exhibited a positive linear correlation with total organic carbon. This study offers an effective HCO system to enhance TCH mineralisation through interfacial O3 catalysis rather than simple degradation, and this provided comprehensive insights to improve O3 utilisation and reduce energy consumption of catalytic ozonation processes.
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Affiliation(s)
- Yufei Gao
- College of Environmental Science and Engineering, Nankai University, Tianjin 300050, China
| | - Heng Li
- College of Environmental Science and Engineering, Nankai University, Tianjin 300050, China
| | - Ruoyue Zhang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300050, China
| | - Minxiang Zeng
- College of Environmental Science and Engineering, Nankai University, Tianjin 300050, China
| | - Jiaqi Hu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300050, China
| | - Jinfeng Lu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300050, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, Nankai University, Tianjin 300350, China; Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin 300350, China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
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Liu J, Yuan X, Dong H, Sans C. Progress in MnO 2/MnO 2-based materials catalytic ozonation process for water and wastewater treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 383:125493. [PMID: 40279744 DOI: 10.1016/j.jenvman.2025.125493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2025] [Revised: 04/04/2025] [Accepted: 04/20/2025] [Indexed: 04/29/2025]
Abstract
Heterogeneous catalytic ozonation (HCO) utilizes catalysts to enhance the adsorption and decomposition of ozone (O3), promote the formation of reactive oxygen species (ROS), and improve the removal of organic compounds, thereby overcoming some disadvantages of ozonation. MnO2/MnO2-based materials are widely used as catalysts for HCO due to their multi-valent Mn species, environment friendliness, abundant resources, and high efficiency. This review aims to provide an overview of the advancements in HCO using MnO2/MnO2-based materials, focusing on their preparation, structural characteristics, catalytic performance, and proposed mechanisms. In particular, the effects of MnO2 synthesis methods on the crystalline structure and morphology of catalysts are discussed. Then, the catalytic performances of various catalysts involving different phases, morphologies, and facets are compared. Subsequently, the enhanced applications of MnO2-based catalysts in HCO for water treatment are described, including metals doping, metal oxides combination, and MnO2-carrier. Furthermore, approaches of ROS identification are clarified, and the mechanisms of strengthening catalytic ozonation efficiency by MnO2/MnO2-based catalysts are summarized, containing redox couple theory, oxygen vacancy theory, complexation theory, and surface hydroxyl theory. Finally, the potential applications and perspectives of MnO2/MnO2-based catalysts are proposed. This review plans to bridge the gap between research and practical applications, providing new insights into the application of HCO technologies in water treatment.
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Affiliation(s)
- Jing Liu
- Department of Chemical Engineering and Analytical Chemistry, Faculty of Chemistry, Universitat de Barcelona, C/Martí i Franqués 1, 08028, Barcelona, Spain
| | - Xiangjuan Yuan
- Department of Chemical Engineering and Analytical Chemistry, Faculty of Chemistry, Universitat de Barcelona, C/Martí i Franqués 1, 08028, Barcelona, Spain; School of Resources and Environment, Wuhan Textile University, Wuhan, 430073, China.
| | - Huiyu Dong
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing, 100085, China
| | - Carmen Sans
- Department of Chemical Engineering and Analytical Chemistry, Faculty of Chemistry, Universitat de Barcelona, C/Martí i Franqués 1, 08028, Barcelona, Spain.
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Liu Y, Zhang W, Li W, Xiong J, Huang Z, Gan T, Hu H, Qin Y, Zhang Y. MnO 2/porous spontaneously polarized ceramic with self-powered electric field and superior charge transfer to catalyze ozonation for efficient demulsification. JOURNAL OF HAZARDOUS MATERIALS 2025; 486:137075. [PMID: 39756328 DOI: 10.1016/j.jhazmat.2024.137075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2024] [Revised: 12/24/2024] [Accepted: 12/31/2024] [Indexed: 01/07/2025]
Abstract
Ozone (O3) demulsification shows great potential in emulsion wastewater treatment due to its strong oxidative properties. However, the low mass transfer efficiency and oxidation selectivity of O3 cannot be ignored. Herein, a MnO2/porous spontaneously polarized ceramic (MnO2/PSPC) composite with strong interfacial interactions and self-powered electric field was prepared for heterogeneous catalytic ozonation (HCO) to achieve efficient demulsification. Excellent remanent polarization (0.00858 μC/cm2) together with systematic electrochemical characterizations of MnO2/PSPC demonstrated its significant charge transfer capability, which is essential for the subsequent reduction of Mn4+ in the HCO demulsification process. O3- MnO2/PSPC exhibited excellent demulsification performance with 99 % demulsification rate of cetyltrimethylammonium bromide-stabilized emulsion within 30 min, outperforming O3 (130 min), O3-MnO2 (60 min), and O3-PSPC (90 min). O3-MnO2/PSPC showed effective demulsification of non-/anionic surfactant stabilized emulsions and excellent stability after 5 cycles. Density functional theory calculations together with characterizations illustrate that potential difference-induced rapid electron transfer and water flow-induced self-powered electric field were the fundamental motivation for the fast Mn3+/Mn4+ cycle and O3 adsorption/decomposition to generate reactive oxygen species (ROS). Notably, the oxidation of surfactants by ROS led to the coalescence of the oil droplets. This study provides an efficient, sustainable, and energy-efficient method to improve the O3 demulsification performance.
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Affiliation(s)
- Yiping Liu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Wuxiang Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Wanhe Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Jie Xiong
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Zuqiang Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China.
| | - Tao Gan
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Huayu Hu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Yuben Qin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Yanjuan Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China.
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Xie X, Wang J, Guo X, Sun J, Wang X, Duo Wu W, Wu L, Wu Z. Comparative study on CeO 2 catalysts with different morphologies and exposed facets for catalytic ozonation: performance, key factor and mechanism insight. J Colloid Interface Sci 2024; 673:847-859. [PMID: 38908284 DOI: 10.1016/j.jcis.2024.06.119] [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: 04/14/2024] [Revised: 06/11/2024] [Accepted: 06/15/2024] [Indexed: 06/24/2024]
Abstract
Morphology and facet effects of metal oxides in heterogeneous catalytic ozonation (HCO) are attracting increasing interests. In this paper, the different HCO performances for degradation and mineralization of phenol of seven ceria (CeO2) catalysts, including four with different morphologies (nanorod, nanocube, nanooctahedron and nanopolyhedron) and three with the same nanorod morphology but different exposed facets, are comparatively studied. CeO2 nanorods with (110) and (100) facets exposed show the best performance, much better than that of single ozonation, while CeO2 nanocubes and nanooctahedra show performances close to single ozonation. The underlying reason for their different HCO performances is revealed using various experimental and density functional theory (DFT) calculation results and the possible catalytic reaction mechanism is proposed. The oxygen vacancy (OV) is found to be pivotal for the HCO performance of the different CeO2 catalysts regardless of their morphology or exposed facet. A linear correlation is discerned between the rate of catalytic decomposition of dissolved ozone (O3) and the density of Frenkel-type OV. DFT calculations and in-situ spectroscopic studies ascertain that the existence of OV can boost O3 activation on both the hydroxyl (OH) and Ce sites of CeO2. Conversely, various facets without OV exhibit similar O3 adsorption energies. The OH group plays an important role in activating O3 to produce hydroxyl radical (∙OH) for improved mineralization. This work may offer valuable insights for designing Facet- and OV-regulated catalysts in HCO for the abatement of refractory organic pollutants.
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Affiliation(s)
- Xianglin Xie
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China; Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Jiaren Wang
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China; Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Xingchen Guo
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China; Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Jinqiang Sun
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China; Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Xiaoning Wang
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China; Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Winston Duo Wu
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Lei Wu
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, PR China.
| | - Zhangxiong Wu
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China; Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China.
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5
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Hu R, Li JY, Yu Q, Yang SQ, Ci X, Qu B, Yang L, Liu ZQ, Liu H, Yang J, Sun S, Cui YH. Catalytic ozonation of reverse osmosis concentrate from coking wastewater reuse by surface oxidation over Mn-Ce/γ-Al 2O 3: Effluent organic matter transformation and its catalytic mechanism. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134363. [PMID: 38663291 DOI: 10.1016/j.jhazmat.2024.134363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/30/2024] [Accepted: 04/18/2024] [Indexed: 05/12/2024]
Abstract
Degradation of organics in high-salinity wastewater is beneficial to meeting the requirement of zero liquid discharge for coking wastewater treatment. Creating efficient and stable performance catalysts for high-salinity wastewater treatment is vital in catalytic ozonation process. Compared with ozonation alone, Mn and Ce co-doped γ-Al2O3 could remarkably enhance activities of catalytic ozonation for chemical oxygen demand (COD) removal (38.9%) of brine derived from a two-stage reverse osmosis treatment. Experimental and theoretical calculation results indicate that introducing Mn could increase the active points of catalyst surface, and introducing Ce could optimize d-band electronic structures and promote the electron transport capacity, enhancing HO• bound to the catalyst surface ([HO•]ads) generation. [HO•]ads plays key roles for degrading the intermediates and transfer them into low molecular weight organics, and further decrease COD, molecular weights and number of organics in reverse osmosis concentrate. Under the same reaction conditions, the presence of Mn/γ-Al2O3 catalyst can reduce ΔO3/ΔCOD by at least 37.6% compared to ozonation alone. Furthermore, Mn-Ce/γ-Al2O3 catalytic ozonation can reduce the ΔO3/ΔCOD from 2.6 of Mn/γ-Al2O3 catalytic ozonation to 0.9 in the case of achieving similar COD removal. Catalytic ozonation has the potential to treat reverse osmosis concentrate derived from bio-treated coking wastewater reclamation.
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Affiliation(s)
- Rui Hu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Jia-Ying Li
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Qiyi Yu
- China United Engineering Corporation Limited, Hangzhou 310052, PR China
| | - Sui-Qin Yang
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, PR China
| | - Xinbo Ci
- Hebei Think-do Water Treatment Technology Co., Ltd., Shijiazhuang 050035, PR China
| | - Bing Qu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Liwei Yang
- Shandong Zhangqiu Blower Co., Ltd., Jinan 250200, PR China
| | - Zheng-Qian Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
| | - Hongquan Liu
- Hebei Think-do Water Treatment Technology Co., Ltd., Shijiazhuang 050035, PR China
| | - Jingjing Yang
- Key Laboratory of Suzhou Sponge City Technology, Suzhou University of Science and Technology, Suzhou 215009, PR China; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Shiquan Sun
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, PR China
| | - Yu-Hong Cui
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
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6
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Zhuang S, Duan N, Xu F. Synergistic strategy of solute environment and phase control of Pb-based anodes to solve the activity-stability trade-off. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134119. [PMID: 38579581 DOI: 10.1016/j.jhazmat.2024.134119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 03/18/2024] [Accepted: 03/23/2024] [Indexed: 04/07/2024]
Abstract
The contradiction between the activity and stability of metal anodes exists extensively, especially in acid electrooxidation under industrial-level current density. Although the anode modification enhanced the initial activity of anodes, its long-term activity is limited by anode slime accumulation. Herein, a synergistic strategy, coupling the solute environment with the phase control of anodes, is proposed to achieve the trade-off between activity and stability of Pb-based anodes in concentrated sulfuric acid electrolysis. Non-exogenous Mn2+ motivated a series of positive behaviours of reactive-oxygen-species capture, anode reconstruction and corrosion-dependent activity alleviation. The synergistic effects, which are crystal phase-dependent, mainly benefit from the continuous self-healing ability of the specific crystal phase of MnO2 on the anodes by the coexisted Mn2+. Compared with Mn2+/α-MnO2, Mn2+/γ-MnO2 exhibited outperformed activity and stability in boosting oxygen evolution reaction (OER) and reducing hazardous pollutants, which resulted from the energy difference in the rate-determining step of OER and in the selectivity priority of Mn2+/MnO2 oxidation pathway. Interestingly, the pre-coated γ-MnO2 on the anode also presents excellent inheritance, guaranteeing the unchanged crystal phase of MnO2 and the high performance in ultra-low hazardous slime generation in subsequent Mn2+ oxidation. The sustainability of Mn2+/γ-MnO2 was proved in the operating hydrometallurgy conditions on Pb-based anodes. This strategy offers a promising approach for this common issue in electrooxidation-related areas.
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Affiliation(s)
- Siwei Zhuang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Ning Duan
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Fuyuan Xu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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Liu X, Wang L, Li J, Li R, He R, Gao W, Yu N. Preparation of Heterogeneous Fenton Catalysts Cu-Doped MnO 2 for Enhanced Degradation of Dyes in Wastewater. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:833. [PMID: 38786789 PMCID: PMC11124159 DOI: 10.3390/nano14100833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/01/2024] [Accepted: 05/07/2024] [Indexed: 05/25/2024]
Abstract
Herein, a series of heterogeneous Fenton catalysts, Cu doped MnO2 (CDM), with different Cu/Mn molar ratios were prepared via a hydrothermal reaction. Meanwhile, detailed characterizations were used to study the structures of CDM, and it is amazing that the morphology of CDM changed from nanowires to nanoflowers with an increasing amount of Cu doped. Apart from this, both the specific surface area and oxygen vacancy increased obviously with the increasing Cu/Mn molar ratio. Then, the degradation of different dyes was utilized to evaluate the catalytic activity of different CDM with H2O2 used as the oxidizing agent, and the 50%-CDM with the highest content of Cu doped displayed the best catalytic activity. Herein, the degradation efficiency (D%) of Congo red (CR) solution with low concentration (60 mg/L) reached 100% in 3 min, while the D% of CR solution with a high concentration (300 mg/L) reached 99.4% after 5 min with a higher dosage of H2O2. Additionally, the 50%-CDM also displayed excellent reusability, for which the D% values were still higher than 90% after the 14th cycles. Based on the structure characteristics and mechanism analysis, the excellent catalytic capacity of 50%-CDM was due to the combined influence of large specific surface area and abundant oxygen vacancy. Thus, a promising heterogeneous Fenton catalyst was developed in this study, which proved the treatment efficiency of actual dye wastewater.
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Affiliation(s)
- Xiao Liu
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (L.W.); (J.L.); (R.L.); (R.H.); (W.G.)
- Key Laboratory of Polymer Materials and Manufacturing Technology, North Minzu University, Yinchuan 750021, China
- International Scientific and Technological Cooperation Base of Industrial Waste Recycling and Advanced Materials, Yinchuan 750021, China
| | - Lu Wang
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (L.W.); (J.L.); (R.L.); (R.H.); (W.G.)
| | - Jiran Li
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (L.W.); (J.L.); (R.L.); (R.H.); (W.G.)
| | - Rong Li
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (L.W.); (J.L.); (R.L.); (R.H.); (W.G.)
| | - Runze He
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (L.W.); (J.L.); (R.L.); (R.H.); (W.G.)
| | - Wanglong Gao
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (L.W.); (J.L.); (R.L.); (R.H.); (W.G.)
| | - Neng Yu
- Huadian Electric Power Research Institute Company, Hangzhou 310012, China;
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Zeng Y, Zhuo Q, Pan J, Lan Y, Dai L, Guan B. Switching reactive oxygen species reactions derived from Mn-Pt anchored zeolite for selective catalytic ozonation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 347:123747. [PMID: 38460590 DOI: 10.1016/j.envpol.2024.123747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 02/28/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
Rationally switching reactive oxygen species (ROS) reactions in advanced oxidation processes (AOPs) is urgently needed to improve the adaptability and efficiency for the engineering application. Herein we synthesized bimetallic Mn-Pt catalysts based on zeolite to realize the switching of ROS reactions in catalytic ozonation for sustainable degradation of organic pollutants from water. The ROS reactions switched from singlet oxygen (1O2, 71.01%) to radical-dominated (93.79%) pathway by simply introducing defects and changing Pt/Mn ratios. The oxygen vacancy induced by anchoring Mn-Pt species from zeolite external surface (MnPt/H-Beta) to internal framework (MnPt@Si-Beta) exposes more electron-rich Pt2+/Pt4+ redox sites, accelerating the decomposition of O3 to generate •OH via electron transfer and switching ROS reactions. The Mn site acted as a bridge plays a critical role in conducting electrons from organic pollutants to Pt sites, which solidly solves the electron loss of catalysts, facilitating the efficient degradation of pollutants. A 34.7-fold increase in phenol degradation compared with the non-catalytic ozonation and an excellent catalytic stability are achieved by MnPt@Si-Beta/O3. The 1O2-dominated ROS reaction originated from MnPt/H-Beta/O3 exhibits superior performances in anti-interference for Cl-, HCO3-, NO3-, and SO4-. This work establishes a novel strategy for switching ROS reactions to expand the targeted applications of O3 based AOPs for environmental remediation.
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Affiliation(s)
- Yaxiong Zeng
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Qizheng Zhuo
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jian Pan
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Yuan Lan
- Zhejiang Zheda Qiushi Property Management Co., Ltd., Logistics Group, Zhejiang University, Hangzhou, 310058, China
| | - Liyan Dai
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Baohong Guan
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
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Peng Z, Tang X, Xu P, Qiu P. Calcium Fluoride/Manganese Dioxide Nanocomposite with Dual Enzyme-like Activities for Uric Acid Sensing: A Comparative Study of Enzyme and Nonenzyme Methods. ACS APPLIED MATERIALS & INTERFACES 2024; 16:54-65. [PMID: 38117478 DOI: 10.1021/acsami.3c12114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The debate over enzyme methods versus nonenzyme methods in the field of nanosensing has lasted for decades despite hundreds of published studies on this topic. In this study, we first present a comparative analysis of these methods using a reaction based on the CaF2/MnO2 nanocomposite (CM Nc) with dual-enzyme activity, presenting oxidase- and peroxidase-like activities. Uric acid (UA) is a byproduct of purine metabolism in the body, and abnormal levels can cause many diseases; hence, tracking the amount of UA in human serum is crucial. The enzyme method was established using uricase and CM Nc: UA produced H2O2 when catalyzed by uricase; H2O2 was then catalyzed into reactive oxygen species (ROS) by the peroxidase activity of the CM Nc; this ROS oxidized 3,3',5,5'-tetramethylbenzidine (TMB), which was oxidized into blue oxidized TMB (oxTMB). The nonenzyme method was built on the scavenging effect of UA on the ROS, which prevented the catalytic capability of CM Nc toward TMB and induced blue oxTMB fading. The results of further tests revealed the good selectivity of the enzyme method compared to the fast response of the nonenzyme method. Additionally, both methods were effective in determining the UA concentration in human serum. The two separate methods can also independently verify each other, increasing the accuracy of the detection results in accordance with the relatively independent detection principles. This research provided theoretical backing for the practical design of multienzyme nanozyme catalysts, which can facilitate the precise detection of UA in biochemical products.
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Affiliation(s)
- Zoujun Peng
- Department of Chemistry, Nanchang University, Nanchang 330031, China
- Institute for Advanced Study, Nanchang University, Nanchang 330031, China
| | - Xiaomin Tang
- The Fourth Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330003, China
| | - Peng Xu
- Center of Analysis and Testing, Nanchang University, Nanchang 330031, China
| | - Ping Qiu
- Department of Chemistry, Nanchang University, Nanchang 330031, China
- Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang 330031, China
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Chen Y, Chen R, Chang X, Yan J, Gu Y, Xi S, Sun P, Dong X. Degradation of Sodium Acetate by Catalytic Ozonation Coupled with a Mn-Functionalized Fly Ash: Reaction Parameters and Mechanism. TOXICS 2023; 11:700. [PMID: 37624205 PMCID: PMC10457793 DOI: 10.3390/toxics11080700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/04/2023] [Accepted: 08/09/2023] [Indexed: 08/26/2023]
Abstract
Supported ozone catalysts usually take alumina, activated carbon, mesoporous molecular sieve, graphene, etc. as the carrier for loading metal oxide via the impregnation method, sol-gel method and precipitation method. In this work, a Mn-modified fly ash catalyst was synthesized to reduce the consumption and high unit price of traditional catalyst carriers like alumina. As a solid waste discharged from coal-fired power plants fueled by coal, fly ash also has porous spherical fine particles with constant surface area and activity, abd is expected to be applied as the main component in the synthesis of ozone catalyst. After the pretreatment process and modification with MnOx, the obtained Mn-modified fly ash exhibited stronger specific surface area and porosity combined with considerable ozone catalytic performance. We used sodium acetate as the contaminant probe, which is difficult to directly decompose with ozone as the end product of ozone oxidation, to evaluate the performance of this Mn-modified fly. It was found that ozone molecules can be transformed to generate ·OH, ·O2- and 1O2 for the further oxidation of sodium acetate. The oxygen vacancy produced via Mn modification plays a crucial role in the adsorption and excitation of ozone. This work demonstrates that fly ash, as an industrial waste, can be synthesized as a potential industrial catalyst with stable physical and chemical properties, a simple preparation method and low costs.
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Affiliation(s)
- Yaoji Chen
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Ruifu Chen
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China
| | - Xinglan Chang
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Jingying Yan
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Yajie Gu
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Shuang Xi
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Pengfei Sun
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China
| | - Xiaoping Dong
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China
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11
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Yang D, Meng F, Zhang Z, Liu X. Enhanced Catalytic Ozonation by Mn-Ce Oxide-Loaded Al 2O 3 Catalyst for Ciprofloxacin Degradation. ACS OMEGA 2023; 8:21823-21829. [PMID: 37360444 PMCID: PMC10286253 DOI: 10.1021/acsomega.3c01302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/16/2023] [Indexed: 06/28/2023]
Abstract
Catalytic ozonation is an effective and promising advanced oxidation technology for organic pollutant removal. Herein, CexMn1-xO2 metal oxides loaded on Al2O3 catalysts (Mn-Ce/Al2O3) were synthesized for catalytic ozonation of the wastewater containing ciprofloxacin. The morphology, crystal structure, and specific surface area of the prepared catalyst were characterized. The characteristics of the Mn-Ce/Al2O3 catalyst revealed that the loaded MnO2 could interfere with the formed CeO2 crystals and then produced complex CexMn1-xO2 oxides. Compared with an ozone-alone system (47.4%), the ciprofloxacin degradation efficiency in the Mn-Ce/Al2O3 catalytic ozonation system elevated to 85.1% within 60 min. The ciprofloxacin degradation kinetic rate over the Mn-Ce/Al2O3 catalyst is 3.0 times that of the ozone-alone system. The synergetic corporation of redox pairs between Mn(III)/Mn(IV) and Ce(III)/Ce(IV) in the Mn-Ce/Al2O3 catalyst could accelerate ozone decomposition to generate active oxygen species and further significantly improve the mineralization efficiency of ciprofloxacin. The work demonstrates the great potential of developing dual-site ozone catalysts for advanced treatment of wastewater.
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Affiliation(s)
- Dajie Yang
- School
of Environment, Tsinghua University, Beijing 10084, China
- Ministry
of Water Resources, Beijing 10053, China
| | - Fanbin Meng
- SINOPEC
Research Institute of Petroleum Processing Co., Ltd., Beijing 100083, China
| | - Zhuoran Zhang
- School
of Environment, Tsinghua University, Beijing 10084, China
| | - Xiang Liu
- School
of Environment, Tsinghua University, Beijing 10084, China
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Chen W, He H, Liang J, Wei X, Li X, Wang J, Li L. A comprehensive review on metal based active sites and their interaction with O 3 during heterogeneous catalytic ozonation process: Types, regulation and authentication. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130302. [PMID: 36347142 DOI: 10.1016/j.jhazmat.2022.130302] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 10/30/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Heterogeneous catalytic ozonation (HCO) was a promising water purification technology. Designing novel metal-based catalysts and exploring their structural-activity relationship continued to be a hot topic in HCO. Herein, we reviewed the recent development of metal-based catalysts (including monometallic and polymetallic catalysts) in HCO. Regulation of metal based active sites (surface hydroxyl groups, Lewis acid sites, metal redox cycle and surface defect) and their key roles in activating O3 were explored. Advantage and disadvantage of conventional characterization techniques on monitoring metal active sites were claimed. In situ electrochemical characterization and DFT simulation were recommended as supplement to reveal the metal active species. Though the ambiguous interfacial behaviors of O3 at these active sites, the existence of interfacial electron migration was beyond doubt. The reported metal-based catalysts mainly served as electron donator for O3, which resulted in the accumulation of oxidized metal and reduced their activity. Design of polymetallic catalysts could accelerate the interfacial electron migration, but they still faced with the dilemma of sluggish Me(n+m)+/Men+ redox cycle. Alternative strategies like coupling active metal species with mesoporous silicon materials, regulating surface hydrophobic/hydrophilic properties, polaring surface electron distribution, coupling HCO process with photocatalysis and H2O2 were proposed for future research.
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Affiliation(s)
- Weirui Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Hengxi He
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China
| | - Jiantao Liang
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China
| | - Xipeng Wei
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Xukai Li
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China.
| | - Jing Wang
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China
| | - Laisheng Li
- School of Environment, South China Normal University, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China.
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13
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Li X, Fu L, Chen F, Zhao S, Zhu J, Yin C. Application of Heterogeneous Catalytic Ozonation in Wastewater Treatment: An Overview. Catalysts 2023; 13:342. [DOI: 10.3390/catal13020342] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2025] Open
Abstract
Catalytic ozonation is a non-selective mineralization technology of organic matter in water by using active free radicals generated by ozone degradation. Catalytic ozonation technology can be divided into homogeneous catalytic reactions using metal ions as catalysts and heterogeneous catalytic reactions using solid catalysts. Homogeneous catalytic ozonation technology has many problems, such as low mineralization rate, secondary pollution caused by the introduction of metal ions and low utilization efficiency of oxidants, which limit its practical application. Compared with homogeneous catalytic ozonation technology, heterogeneous catalytic ozonation technology has the advantages of easy recovery, lower cost of water treatment, higher activity and improved mineralization rate of organic matter. This overview classifies and describes catalysts for heterogeneous catalytic ozonation technology, including the different types of metal oxides, metal-free catalysts, and substrates used to immobilize catalysts. In addition, the heterogeneous catalytic ozonation process involved in the multiphase complex reaction process is discussed. The effects of different parameters on the performance of heterogeneous catalytic ozonation are also discussed.
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Affiliation(s)
- Xingxing Li
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Li Fu
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Fei Chen
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Shichao Zhao
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Jiangwei Zhu
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Chengliang Yin
- Faculty of Medicine, Macau University of Science and Technology, Macau 999078, China
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Catalytic Ozonation of Norfloxacin Using Co-Mn/CeO2 as a Multi-Component Composite Catalyst. Catalysts 2022. [DOI: 10.3390/catal12121606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In this study, a Co-Mn/CeO2 composite was prepared through a facile sol-gel method and used as an efficient catalyst for the ozonation of norfloxacin (NOR). The Co-Mn/CeO2 composite was characterized via XRD, SEM, BET and XPS analysis. The catalytic ozonation of NOR by Co-Mn/CeO2 under different conditions was systematically investigated, including the effect of the initial solution’s pH, Co-Mn/CeO2 composite dose, O3 dose and NOR concentration on degradation kinetics. Only about 3.33% of total organic carbon (TOC) and 72.17% of NOR could be removed within 150 min by single ozonation under the conditions of 60 mg/L of NOR and 200 mL/min of O3 at pH= 7 and room temperature, whereas in the presence of 0.60 g/L of the Co-Mn/CeO2 composite under the same conditions, 87.24% NOR removal was obtained through the catalytic ozonation process. The results showed that catalytic ozonation with the Co-Mn/CeO2 composite could effectively enhance the degradation and mineralization of NOR compared to a single ozonation system alone. The catalytic performance of CeO2 was significantly improved by the modification with Mn and Co. Co-Mn/CeO2 represents a promising way to prepare efficient catalysts for the catalytic ozonation of organic polluted water. The removal efficiency of NOR in five cycles indicates that Co-Mn/CeO2 is stable and recyclable for catalytic ozonation in water treatment.
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Wang Y, Chen D, Zhang ZX, Zhou T, Zou JP. Singlet oxygen-dominated activation of peroxymonosulfate by 3D hierarchical MnO2 nanostructures for degradation of organic pollutants in water: Surface defect and catalytic mechanism. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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