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Tian S, Shi X, Wang S, He Y, Zheng B, Deng X, Zhou Z, Wu W, Xin K, Tang L. Recyclable Fe 3O 4@UiO-66-PDA core-shell nanomaterials for extensive metal ion adsorption: Batch experiments and theoretical analysis. J Colloid Interface Sci 2024; 665:465-476. [PMID: 38537592 DOI: 10.1016/j.jcis.2024.03.150] [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: 01/23/2024] [Revised: 03/22/2024] [Accepted: 03/22/2024] [Indexed: 04/17/2024]
Abstract
With the ever-increasing challenge of heavy metal pollution, the imperative for developing highly efficient adsorbents has become apparent to remove metal ions from wastewater completely. In this study, we introduce a novel magnetic core-shell adsorbent, Fe3O4@UiO-66-PDA. It features a polydopamine (PDA) modified zirconium-based metal-organic framework (UiO-66) synthesized through a simple solvothermal method. The adsorbent boasts a unique core-shell architecture with a high specific surface area, abundant micropores, and remarkable thermal stability. The adsorption capabilities of six metal ions (Fe3+, Mn2+, Pb2+, Cu2+, Hg2+, and Cd2+) were systematically investigated, guided by the theory of hard and soft acids and bases. Among these, three representative metal ions (Fe3+, Pb2+, and Hg2+) were scrutinized in detail. The activated Fe3O4@UiO-66-PDA exhibited exceptional adsorption capacities for these metal ions, achieving impressive values of 97.99 mg/g, 121.42 mg/g, and 130.72 mg/g, respectively, at pH 5.0. Moreover, the adsorbent demonstrated efficient recovery from aqueous solution using an external magnet, maintaining robust adsorption efficiency (>80%) and stability even after six cycles. To delve deeper into the optimized adsorption of Hg2+, density functional theory (DFT) analysis was employed, revealing an adsorption energy of -2.61 eV for Hg2+. This notable adsorption capacity was primarily attributed to electron interactions and coordination effects. This study offers valuable insights into metal ion adsorption facilitated, by magnetic metal-organic framework (MOF) materials.
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Affiliation(s)
- Shuangqin Tian
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
| | - Xin Shi
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China; Honghe Prefecture Nationality Senior High School, Honghe 661200, Yunnan Province, PR China.
| | - Shujie Wang
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
| | - Yi He
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
| | - Bifang Zheng
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
| | - Xianhong Deng
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
| | - Ziqin Zhou
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
| | - Wenbin Wu
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
| | - Kai Xin
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
| | - Lihong Tang
- School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
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Daliran S, Oveisi AR, Kung CW, Sen U, Dhakshinamoorthy A, Chuang CH, Khajeh M, Erkartal M, Hupp JT. Defect-enabling zirconium-based metal-organic frameworks for energy and environmental remediation applications. Chem Soc Rev 2024; 53:6244-6294. [PMID: 38743011 DOI: 10.1039/d3cs01057k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
This comprehensive review explores the diverse applications of defective zirconium-based metal-organic frameworks (Zr-MOFs) in energy and environmental remediation. Zr-MOFs have gained significant attention due to their unique properties, and deliberate introduction of defects further enhances their functionality. The review encompasses several areas where defective Zr-MOFs exhibit promise, including environmental remediation, detoxification of chemical warfare agents, photocatalytic energy conversions, and electrochemical applications. Defects play a pivotal role by creating open sites within the framework, facilitating effective adsorption and remediation of pollutants. They also contribute to the catalytic activity of Zr-MOFs, enabling efficient energy conversion processes such as hydrogen production and CO2 reduction. The review underscores the importance of defect manipulation, including control over their distribution and type, to optimize the performance of Zr-MOFs. Through tailored defect engineering and precise selection of functional groups, researchers can enhance the selectivity and efficiency of Zr-MOFs for specific applications. Additionally, pore size manipulation influences the adsorption capacity and transport properties of Zr-MOFs, further expanding their potential in environmental remediation and energy conversion. Defective Zr-MOFs exhibit remarkable stability and synthetic versatility, making them suitable for diverse environmental conditions and allowing for the introduction of missing linkers, cluster defects, or post-synthetic modifications to precisely tailor their properties. Overall, this review highlights the promising prospects of defective Zr-MOFs in addressing energy and environmental challenges, positioning them as versatile tools for sustainable solutions and paving the way for advancements in various sectors toward a cleaner and more sustainable future.
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Affiliation(s)
- Saba Daliran
- Department of Organic Chemistry, Faculty of Chemistry, Lorestan University, Khorramabad 68151-44316, Iran.
| | - Ali Reza Oveisi
- Department of Chemistry, University of Zabol, P.O. Box: 98615-538, Zabol, Iran.
| | - Chung-Wei Kung
- Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan City 70101, Taiwan.
| | - Unal Sen
- Department of Materials Science and Engineering, Faculty of Engineering, Eskisehir Technical University, Eskisehir 26555, Turkey
| | - Amarajothi Dhakshinamoorthy
- Departamento de Quimica, Universitat Politècnica de València, Av. De los Naranjos s/n, 46022 Valencia, Spain
- School of Chemistry, Madurai Kamaraj University, Madurai 625021, India
| | - Cheng-Hsun Chuang
- Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan City 70101, Taiwan.
| | - Mostafa Khajeh
- Department of Chemistry, University of Zabol, P.O. Box: 98615-538, Zabol, Iran.
| | - Mustafa Erkartal
- Department of Basic Sciences, Faculty of Engineering, Architecture and Design, Bartin University, Bartin 74110, Turkey
| | - Joseph T Hupp
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA.
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Cai J, Zhang J, Shi J, Zhao H, Wei Y, Miao X, Shen K, Zhao R, Xiao L, Hou L. Defective UiO-66-NH 2 (Zr) for Simultaneous Adsorption of Phosphate and Pb 2+ for Hydrogen Peroxide Purification. Inorg Chem 2024; 63:7314-7324. [PMID: 38597294 DOI: 10.1021/acs.inorgchem.4c00179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Removal of hetero ions from the hydrogen peroxide solution is a crucial step in purifying electronic-grade H2O2. Conventional adsorption materials are challenged to meet the need for the simultaneous adsorption of both anions and cations in solvents. UiO-66 (Zr) modified by acetic acid and amino group for simultaneous adsorption of phosphate and Pb2+ in H2O2 purification was fabricated in this work. The as-prepared defective UiO-66-NH2 (Zr) demonstrated a significant increase in specific surface area and porosity, along with more exposed sites for phosphate and Pb2+ adsorption. The adsorption capacity of De-UiO-66-NH2 for phosphate and Pb2+ in H2O2 solution was 52.28 mg g-1 and 35.4 mg g-1, which is 1.19 times and 1.88 times that of unmodified UiO-66 (Zr), respectively. The trace simultaneous adsorption with both 100 ppb phosphate and Pb2+ showed removal rates of 94.0% and 88.7%, respectively, confirming the practicality of MOF materials in the purification of electronic chemicals. This work highlights the potential of Zr-based MOFs as anionic and cationic simultaneous adsorbents for highly efficient purification of electronic-grade solvents.
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Affiliation(s)
- Jingyu Cai
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
| | - Jian Zhang
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Junjie Shi
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Hao Zhao
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Yifeng Wei
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Xiaoyu Miao
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Kun Shen
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
| | - Rui Zhao
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
| | - Longqiang Xiao
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
| | - Linxi Hou
- Department of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
- Fujian Key Laboratory of Advanced Manufacturing Technology of Specialty Chemicals, Fuzhou University, Fuzhou 350116, China
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Li S, Ali S, Zuhra Z, Abbas Y, Xie G, Wang X, Ding S. Turning precious metal-loaded e-waste to useful catalysts: Investigation into supercilious recovery and catalyst viability for peroxymonosulfate activation. CHEMOSPHERE 2023:139170. [PMID: 37307931 DOI: 10.1016/j.chemosphere.2023.139170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/15/2023] [Accepted: 06/07/2023] [Indexed: 06/14/2023]
Abstract
Here, the key tasks to be accomplished are selective precious metal recovery from e-wastewater and their conversion into valuable catalysts for peroxymonosulfate (PMS) activation. In this regard, we developed a hybrid material using 3D functional graphene foam and copper para-phenylenedithol (Cu-pPDT) MOF. The prepared hybrid showed a supercilious recovery of 92-95% even up to five cycles for Au(III) and Pd(II), which can be viewed as a reference for both the 2D graphene and the MOFs family. The outstanding performance has been attributed principally to the impact of diverse functionality as well as the unique morphology of 3D graphene foam, which provided a wide range of surface area and additional active sites in the hybrid frameworks. To prepare the surface-loaded metal nanoparticle catalysts, the sorbed samples recovered after precious metal extraction were calcined at 800 °C. The viability of the developed catalysts for the breakdown of 4-nitrophenol (4-NP) via PMS activation was investigated. Electron paramagnetic resonance spectroscopy (EPR) and experiments with radical scavengers suggest that sulfate and hydroxyl radicals are the main reactive species involved in the breakdown of 4-NP. This is because the active graphitic carbon matrix and the exposed precious metal and copper active sites work together in a way that is more effective.
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Affiliation(s)
- Shuo Li
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China; Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, School of Chemistry, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Shafqat Ali
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Zareen Zuhra
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Yasir Abbas
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Guanqun Xie
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China.
| | - Xiaoxia Wang
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China.
| | - Shujiang Ding
- Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, School of Chemistry, Xi'an Jiaotong University, Xi'an, 710049, China
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Zhao YG, Wang EJ, Zheng JJ, Guan F, Lu Y. Modeling and spectroscopic investigation of U(VI) removal on porous amidoxime-functionalized metal organic framework derived from macromolecular carbohydrate. Int J Biol Macromol 2023:125043. [PMID: 37224909 DOI: 10.1016/j.ijbiomac.2023.125043] [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: 05/04/2023] [Revised: 05/18/2023] [Accepted: 05/21/2023] [Indexed: 05/26/2023]
Abstract
The investigation of interaction mechanism of U(VI) selective removal on amidoxime-functionalized metal organic framework (i.e., UiO-66(Zr)-AO) derived from macromolecular carbohydrate is conducive to apply metal organic frameworks in actual environmental remediation. The batch experiments showed that UiO-66(Zr)-AO displayed the fast removal rate (equilibrium time of 0.5 h), high adsorption capacity (384.6 mg/g), excellent regeneration performance (<10 % decrease after three cycles) towards U(VI) removal due to the unprecedented chemical stability, large surface area and simple fabrication. U(VI) removal at different pH can be satisfactorily fitted by diffuse layer modeling with cation exchange at low pH and an inner-sphere surface complexation at high pH. The inner-sphere surface complexation was further demonstrated by X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) analysis. These findings revealed that UiO-66(Zr)-AO can be an effective adsorbent to remove the radionuclides from aqueous solution, which is crucial for recycling of uranium resource and decreasing the uranium harm to the environment.
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Affiliation(s)
- Yong-Gang Zhao
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - En-Jun Wang
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Jun-Jie Zheng
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Fachun Guan
- Institute of Rural Energy and Ecology, Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Yin Lu
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China.
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Mo Z, Zhang H, Shahab A, khan FA, Chen J, Huang C. Functionalized metal-organic framework UIO-66 nanocomposites with ultra-high stability for efficient adsorption of heavy metals: Kinetics, thermodynamics, and isothermal adsorption. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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7
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Santibañez D, Mendizabal F. Understanding lead and mercury adsorption by post-synthetically modified linkers in UiO-66 MOF. A computational theoretical study. MOLECULAR SIMULATION 2023. [DOI: 10.1080/08927022.2023.2171073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Daniel Santibañez
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Fernando Mendizabal
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
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Li Y, Lv G, Liu H, Liu X, Liao L. Improvement of magnetite adsorption performance for Pb (II) by introducing defects. Front Chem 2023; 11:1137246. [PMID: 36909709 PMCID: PMC9998494 DOI: 10.3389/fchem.2023.1137246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 02/16/2023] [Indexed: 03/14/2023] Open
Abstract
Surface defect engineering is an efficient strategy to enhance the adsorption properties of materials. After calcination in argon, the adsorption capacity of natural magnetite to Pb (II) is significantly improved. The Rietveld refinement, Mössbauer spectrum, and XPS were used to prove the existence of oxygen and cation vacancies in the crystal structure of magnetite after calcination, and it is found that the vacancy content is linearly related to the adsorption amount of Pb (II). This indicates that the increase in the adsorption performance of magnetite after calcination is determined by the vacancy. The adsorption capacity increases from 8 to 26 mg/g when the calcination temperature reaches 700°C. The equilibrium adsorption process of Pb (II) on magnetite can be well fitted to the Langmuir model, and the kinetic adsorption followed a pseudo-second-order mechanism. The improvement of the adsorption performance of magnetite is mainly due to the change in its structure, which depends on the oxidation degree and surface effect of magnetite in the calcination process. This work also provides a theoretical basis for the broad application of magnetite as environmental material.
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Affiliation(s)
- Yuxin Li
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Material Sciences and Technology, China University of Geosciences (Beijing), Beijing, China
| | - Guocheng Lv
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Material Sciences and Technology, China University of Geosciences (Beijing), Beijing, China
| | - Hao Liu
- School of Science, China University of Geosciences (Beijing), Beijing, China
| | - Xin Liu
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Material Sciences and Technology, China University of Geosciences (Beijing), Beijing, China
| | - Libing Liao
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Material Sciences and Technology, China University of Geosciences (Beijing), Beijing, China
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Huang Z, Xiong C, Ying L, Wang W, Wang S, Ding J, Lu J. A post-functional Ti-based MOFs composite for selective removal of Pb (II) from water. JOURNAL OF HAZARDOUS MATERIALS 2022; 432:128700. [PMID: 35305417 DOI: 10.1016/j.jhazmat.2022.128700] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 03/08/2022] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
Lead ions in water have notorious effects on humans and environment. It is important to design an adsorbent with high adsorption capacity and reproducibility for efficiently removing Pb (II)ions from polluted water. Here, a novel Ti-based MOFs material (BDB-MIL-125(Ti)@Fe3O4) was prepared by modifying NH2-MIL-125(Ti) with sulfhydryl and amino groups. Due to the large number of active sites, the maximum Pb (II) adsorption capacity of BDB-MIL-125(Ti)@Fe3O4 was 710.79 mg/g at 25 °C and pH = 6 within 120 min corresponding to a maximum removal rate of 95.68%. The adsorbent also has extremely high selectivity and good cycling adsorption performance. The adsorption isotherms and kinetics agree with the Langmuir and the pseudo-second-order models, indicating that the process was chemisorption. Thermodynamic studies prove that spontaneous processes enhance Pb (II) adsorption at higher temperatures. DFT and FMOs calculations were used to discuss the adsorption mechanism. The sulfhydryl groups on the surface of organic ligands have a stronger affinity for Pb (II).
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Affiliation(s)
- Zhen Huang
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Chao Xiong
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, PR China
| | - Lingri Ying
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Welong Wang
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Shixing Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China.
| | - Jing Ding
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Jianfeng Lu
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, PR China
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Xu H, Xie T, Ye J, Wu Q, Wang D, Cai D. Highly Efficient and Simultaneous Removal of Cr(VI) and Imidacloprid through a Ferrocene-Modified MIL-100(Fe) Composite from an Aqueous Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:6579-6591. [PMID: 35576243 DOI: 10.1021/acs.langmuir.2c00417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A novel nanocomposite [Fc-MIL-100(Fe)] was constructed by combining ferrocene (Fc) with the porous structural metal-organic framework [MIL-100(Fe)]. The proposed composite material could simultaneously and efficiently remove hexavalent chromium [Cr(VI)] and imidacloprid and reduced strongly noxious Cr(VI) to weakly noxious trivalent chromium [Cr(III)]. The removal efficiencies of the composite material for Cr(VI) and imidacloprid could reach 95% after 15 h. The adsorption process was determined by kinetics, isotherms, and thermodynamics. The results demonstrated that the adsorption kinetics of Cr(VI) followed the pseudo-second-order model mainly by chemisorption; meanwhile, the adsorption of imidacloprid by the material conformed to the pseudo-first-order kinetics, which indicated that physical adsorption was the main process. Additionally, the intraparticle diffusion model revealed that the uptake of imidacloprid and Cr(VI) occurred via intraparticle diffusion at the composite material. The adsorption procedure for Cr(VI) was fitted to the Langmuir model (R2 = 0.995) via monolayer adsorption, and that for imidacloprid was fitted to the Freundlich model (R2 = 0.995) due to multilayer or heterogeneous adsorption. The thermodynamic research confirmed that the adsorption procedure was exothermic and spontaneous. Infrared spectroscopy, X-ray photoelectron spectra, and the pH effect implied that intermolecular hydrogen bonding and electrostatic interaction played a crucial role during the removal process. Fc-MIL-100(Fe) also exhibited long-term stability and satisfactory regeneration and reusability. Therefore, this method may enhance an environmentally friendly and prospective approach for concurrently removing imidacloprid and Cr(VI) from wastewater.
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Affiliation(s)
- He Xu
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Tao Xie
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Jinghong Ye
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Qingchuan Wu
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Dongfang Wang
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Dongqing Cai
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
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High Performance of UiO-66 Metal–Organic Framework Modified with Melamine for Uptaking of Lead and Cadmium from Aqueous Solutions. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02326-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Abstract
In this paper, UiO-66 metal–organic framework (MOF) was prepared by a hydrothermal method and modified consequently with melamine (MUiO-66), as so as enhance the adsorption properties of these materials in liquid-phase adsorption. With respect to this, the adsorption of lead and cadmium divalent ions was performed under varying conditions of pH, metal ion concentration, contact time, adsorbent dose and temperature. Morphology, texture properties, functional groups, crystallinity and thermal properties of both MOFs were examined. UiO-66 composed of sphere-like particles and covered by layers of melamine with enhancing in crystallinity and active sites as well as the total surface area increased from 1080 to 1160 m2/g. The modified UiO-66 with melamine (MUiO-66) showed a notable adsorption capacity of 177.5 and 146.6 mg/g for Pb and Cd(II) ions, respectively. Adsorption of both metals fitted well with the pseudo-second-order kinetic and Langmuir models and controlled by a physisorption mechanism at pH of 5. Also, adsorption process is an endothermic in nature and desorption is achieved well for three cycles by MUiO-66. Therefore, UiO-66 and MUiO-66 obtained in this work have a great promise in adsorption of heavy metals such as Pb and Cd(II) ions from wastewater.
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Xiaotong H, Wang J, Mousavi B, Klomkliang N, Chaemchuen S. Strategies for induced defects in metal-organic frameworks for enhancing adsorption and catalytic performance. Dalton Trans 2022; 51:8133-8159. [DOI: 10.1039/d2dt01030e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal-organic frameworks (MOFs) have emerged among porous materials. The designable structure and specific functionality make them stand out for diverse applications. In conceptual MOF, the metal ions/clusters and organic ligands...
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