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Huang Z, Sun X, Liu Y, Cui J, Song A, Hao J. Metal ion-triggered Pickering emulsions and foams for efficient metal ion extraction. J Colloid Interface Sci 2021; 602:187-196. [PMID: 34119757 DOI: 10.1016/j.jcis.2021.05.182] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/19/2021] [Accepted: 05/31/2021] [Indexed: 11/28/2022]
Abstract
Emulsions and foams were constructed by using surfactant particles as stabilizers. Bis(2-ethylhexyl) phosphate, abbreviated as HDEHP, was used as both an oil in neutral form and an anionic surfactant in deprotonated form, DEHP-. In the system of HDEHP/H2O, upon adding NaOH, a portion of HDEHP was deprotonated to form DEHP- as stabilizers of O/W emulsions. After introducing some certain metal ions, the O/W emulsions were transformed to W/O Pickering emulsions due to the generation of insoluble particles by DEHP- and metal ions. In addition, DEHP- could also combine with some metal ions to produce particles absorbed at air/water interface, forming ultrastable foams. Accompanied with the formation of Pickering emulsions and foams, the extraction of metal ions from water could be realized with high removal efficiency. The extractant, HDEHP, could be effectively recycled through convenient demulsification of Pickering emulsions or destruction of foams. This work provides new ideas for the construction of particle-stabilized dispersion systems and proposes methods with potential applications in industrial wastewater treatments.
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Affiliation(s)
- Zhaohui Huang
- Key Laboratory of Colloids and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China
| | - Xiuping Sun
- Key Laboratory of Colloids and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China
| | - Yihan Liu
- Key Laboratory of Colloids and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China
| | - Jiwei Cui
- Key Laboratory of Colloids and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China
| | - Aixin Song
- Key Laboratory of Colloids and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China.
| | - Jingcheng Hao
- Key Laboratory of Colloids and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China
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Kang X, Wei X, Xiang P, Tian X, Zuo Z, Song F, Wang S, Zhu M. Rendering hydrophobic nanoclusters water-soluble and biocompatible. Chem Sci 2020; 11:4808-4816. [PMID: 34122938 PMCID: PMC8159227 DOI: 10.1039/d0sc01055c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 04/20/2020] [Indexed: 12/13/2022] Open
Abstract
Hydrophobic and hydrophilic nanoclusters embody complementary superiorities. The means to amalgamate these superiorities, i.e., the atomic precision of hydrophobic clusters and the water dissolvability of hydrophilic clusters, remains challenging. This work presents a versatile strategy to render hydrophobic nanoclusters water-soluble-the micellization of nanoclusters in the presence of solvent-conjoined Na+ cations-which overcomes the above major challenge. Specifically, although [Ag29(SSR)12(PPh3)4]3- nanoclusters are absolutely hydrophobic, they show good dissolvability in aqueous solution in the presence of solvent-conjoined Na+ cations (Na1(NMP)5 or Na3(DMF)12). Such cations act as both counterions of these nanoclusters and surface cosolvent of cluster-based micelles in the aqueous phase. A combination of DLS (dynamic light scattering) and aberration-corrected HAADF-STEM (high angle annular dark field detector scanning transmission electron microscopy) measurements unambiguously shows that the phase-transfer of hydrophobic Ag29 into water is triggered by the micellization of nanoclusters. Owing to the excellent water solubility and stability of [Ag29(SSR)12(PPh3)4]3-[Na1(NMP)5]3 + in H2O, its performance in cell staining has been evaluated. Furthermore, the general applicability of the micellization strategy has been verified. Overall, this work presents a convenient and efficient approach for the preparation of cluster-based, biocompatible nanomaterials.
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Affiliation(s)
- Xi Kang
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University Hefei 230601 P. R. China
| | - Xiao Wei
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University Hefei 230601 P. R. China
| | - Pan Xiang
- School of Life Sciences, Anhui University Hefei 230601 P. R. China
| | - Xiaohe Tian
- School of Life Sciences, Anhui University Hefei 230601 P. R. China
| | - Zewen Zuo
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University Nanjing 210093 P. R. China
- Atomic Manufacture Institute Nanjing 211805 P. R. China
| | - Fengqi Song
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University Nanjing 210093 P. R. China
- Atomic Manufacture Institute Nanjing 211805 P. R. China
| | - Shuxin Wang
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University Hefei 230601 P. R. China
| | - Manzhou Zhu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University Hefei 230601 P. R. China
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Khoshbin Z, Housaindokht MR, Izadyar M, Bozorgmehr MR, Verdian A. The investigation of the G-quadruplex aptamer selectivity to Pb 2+ ion: a joint molecular dynamics simulation and density functional theory study. J Biomol Struct Dyn 2019; 38:3659-3675. [PMID: 31496379 DOI: 10.1080/07391102.2019.1664933] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The aptamers with the ability to form a G-quadruplex structure can be stable in the presence of some ions. Hence, study of the interactions between such aptamers and ions can be beneficial to determine the highest selective aptamer toward an ion. In this article, molecular dynamics (MD) simulations and quantum mechanics (QM) calculations have been applied to investigate the selectivity of the T30695 aptamer toward Pb2+ in comparison with some ions. The Free Energy Landscape (FEL) analysis indicates that Pb2+ has remained inside the aptamer during the MD simulation, while the other ions have left it. The Molecular Mechanics Poisson-Boltzmann Surface Area (MM-PBSA) binding energies prove that the conformational stability of the aptamer is the highest in the presence of Pb2+. According to the compaction parameters, the greatest compressed ion-aptamer complex, and hence, the highest ion-aptamer interaction have been induced in the presence of Pb2+. The contact maps clarify the closer contacts between the nucleotides of the aptamer in the presence of Pb2+. The density functional theory (DFT) results show that Pb2+ forms the most stable complex with the aptamer, which is consistent with the MD results. The QM calculations reveal that the N-H bonds and the O…H distances are the longest and the shortest, respectively, in the presence of Pb2+. The obtained results verify that the strongest hydrogen bonds (HBs), and hence, the most compressed aptamer structure are induced by Pb2+. Besides, atoms in molecules (AIM) and natural bond orbital (NBO) analyses confirm the results.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Zahra Khoshbin
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - Mohammad Izadyar
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - Asma Verdian
- Department of Food Safety and Quality Control, Research Institute of Food Science and Technology (RIFST), Mashhad, Iran
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Theoretical design and experimental study of new aptamers with the improved target-affinity: New insights into the Pb2+-specific aptamers as a case study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111159] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Chen WC, Juang RS, Wei YH. Applications of a lipopeptide biosurfactant, surfactin, produced by microorganisms. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.07.009] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Preparation, characterization, and performance of a novel hollow fiber nanofiltration membrane. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3549] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Lu J, Li Y, Zhang S, Sun Y. Removal of trace Cd2+ from aqueous solution by foam fractionation. JOURNAL OF HAZARDOUS MATERIALS 2015; 286:466-473. [PMID: 25603296 DOI: 10.1016/j.jhazmat.2015.01.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 12/03/2014] [Accepted: 01/10/2015] [Indexed: 06/04/2023]
Abstract
In recent years, aqueous foam was known as an efficient technique with high potential on being used to remove heavy metal ions from the polluted water, not only because of the low cost, simple operation, but also ascribed to the high removal efficiency of trace heavy metal ions and would not cause secondary pollution to the environment. In this paper, the removal of Cd(2+) from aqueous solution by aqueous foam stabilized by a kind of novel anionic-nonionic surfactant sodium trideceth-4 carboxylate (AEC) was investigated. The effect of conditions such as surfactant/metal ions molar ratio, surfactant concentration on the removal efficiency was studied. In large concentration range of surfactant, the removal rate was higher than 90%, and could reach up to 99.8% under the optimum conditions. The Zeta potential of gas bubbles in the AEC solutions was determined to verify the combination between the negative charged group heads of surfactant molecules and heavy metal ions, and isothermal titration calorimeter (ITC) determination was utilized to demonstrate the interaction, which helped to understand the mechanisms more clearly.
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Affiliation(s)
- Jian Lu
- Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, Shandong University, South Road of ShanDa, Jinan, Shandong 250100, PR China
| | - Ying Li
- Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, Shandong University, South Road of ShanDa, Jinan, Shandong 250100, PR China.
| | - Sen Zhang
- Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, Shandong University, South Road of ShanDa, Jinan, Shandong 250100, PR China
| | - Yange Sun
- Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, Shandong University, South Road of ShanDa, Jinan, Shandong 250100, PR China
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Mondal S, Ghosh S, De S. Atomistic level molecular dynamics simulation on the solubilization mechanism of aromatic molecules in anionic micelles. RSC Adv 2015. [DOI: 10.1039/c5ra20855f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Benzene is solubilized in the palisade layer, toluene in the core (or central region), phenol at the surface and pyridine in micelle–water interface. During micellar enhanced ultrafiltration, phenol will have least rejection while benzene is maximum.
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Affiliation(s)
- Sourav Mondal
- Department of Chemical Engineering
- Indian Institute of Technology Kharagpur
- Kharagpur – 721302
- India
| | - Sudipto Ghosh
- Department of Metallurgical and Materials Engineering
- Indian Institute of Technology Kharagpur
- Kharagpur – 721302
- India
| | - Sirshendu De
- Department of Chemical Engineering
- Indian Institute of Technology Kharagpur
- Kharagpur – 721302
- India
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