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Peng R, Khan MA, Wu J, Chen Z. In Situ Dielectric Spectroscopy Monitoring of Silica Nanoparticle Synthesis in Cationic Water-in-Oil Microemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4121-4128. [PMID: 35333536 DOI: 10.1021/acs.langmuir.2c00218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In situ monitoring of microemulsion-based nanoparticle synthesis is significant for understanding the particle formation mechanism and for advancing controlled nanoparticle synthesis by this means. In this study, the processes of silica nanoparticle synthesis in a CTAB/n-hexanol/cyclohexane/ammonia microemulsion were monitored via dielectric spectroscopy in situ and in real time, with the influences of the water content and precursor concentration being considered. Two dielectric relaxations in addition to a water-induced one were observed in the frequency range of 1 MHz to 3 GHz, which persist throughout the synthesis processes. It is suggested that the lower-frequency relaxation is ascribed to interfacial polarization and the higher-frequency one is caused by the orientational polarization of the ion pair consisting of a counterion and a surfactant polar group. The latter and water-induced relaxations were found to be barely changed during the synthesis processes, while the former changes obviously with synthesis time. The evolution of the lower-frequency relaxation and direct current conductivity with synthesis time are presented and discussed, on the basis of which the particle formation process is inspected from a dielectric spectroscopic point of view.
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Affiliation(s)
- Rui Peng
- Department of Applied Chemistry, School of Natural Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Muhammad Asadullah Khan
- Department of Applied Chemistry, School of Natural Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Jiao Wu
- Department of Applied Chemistry, School of Natural Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Zhen Chen
- Department of Applied Chemistry, School of Natural Science, Anhui Agricultural University, Hefei, Anhui 230036, China
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2
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Fasolini A, Lombardi E, Tabanelli T, Basile F. Microemulsion Derived Titania Nanospheres: An Improved Pt Supported Catalyst for Glycerol Aqueous Phase Reforming. NANOMATERIALS 2021; 11:nano11051175. [PMID: 33947102 PMCID: PMC8144991 DOI: 10.3390/nano11051175] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/23/2021] [Accepted: 04/25/2021] [Indexed: 11/23/2022]
Abstract
Glycerol aqueous phase reforming (APR) produces hydrogen and interesting compounds at relatively mild temperatures. Among APR catalysts investigated in literature, little attention has been given to Pt supported on TiO2. Therefore, herein we propose an innovative titania support which can be obtained through an optimized microemulsion technique. This procedure provided high surface area titania nanospheres, with a peculiar high density of weak acidic sites. The material was tested in the catalytic glycerol APR after Pt deposition. A mechanism hypothesis was drawn, which evidenced the pathways giving the main products. When compared with a commercial TiO2 support, the synthetized titania provided higher hydrogen selectivity and glycerol conversion thanks to improved catalytic activity and ability to prompt consecutive dehydrogenation reactions. This was correlated to an enhanced cooperation between Pt nanoparticles and the acid sites of the support.
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3
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Das A, Yadav N, Manchala S, Bungla M, Ganguli AK. Mechanistic Investigations of Growth of Anisotropic Nanostructures in Reverse Micelles. ACS OMEGA 2021; 6:1007-1029. [PMID: 33490761 PMCID: PMC7818115 DOI: 10.1021/acsomega.0c04033] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
Tailoring the characteristics of anisotropic nanostructures like size, morphology, aspect ratio, and size dispersity is of extreme importance due to the unique and tunable properties including catalytic, optical, photocatalytic, magnetic, photochemical, electrochemical, photoelectrochemical, and several other physical properties. The reverse microemulsion (RM) method offers a useful soft-template and low-temperature procedure that, by variation of experimental conditions and nature of reagents, has proved to be extremely versatile in synthesis of nanostructures with tailored properties. Although many reports of synthesis of nanostructures by the RM method exist in the literature, most of the research studies carried out still follow the "hit and trial" method where the synthesis conditions, reagents, and other factors are varied and the resulting characteristics of the obtained nanostructures are justified on the basis of existing physical chemistry principles. Mechanistic investigations are scarce to generate a set of empirical rules that would aid in preplanning the RM-based synthesis of nanostructures with desired characteristics as well as make the process viable on an industrial scale. A consolidation of such research data available in the literature is essential for providing future directions in the field. In this perspective, we analyze the literature reports that have investigated the mechanistic aspects of growth of anisotropic nanostructures using the RM method and distil the essence of the present understanding at the nanoscale timescale using techniques like FCS and ultrafast spectroscopy in addition to routine techniques like DLS, fluorescence, TEM, etc.
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Affiliation(s)
- Anirban Das
- Department
of Chemistry, Biochemistry and Forensic Sciences, Amity School of
Applied Sciences, Amity University Haryana, Gurugram, Haryana 122413, India
| | - Nitin Yadav
- Department
of Chemistry, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Saikumar Manchala
- Department
of Chemistry, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Manisha Bungla
- Department
of Chemistry, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Ashok K. Ganguli
- Department
of Chemistry, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi, Delhi 110016, India
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4
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Yu Y, Khan MA, Chen Z. In Situ and Real-Time Monitoring of Nanoparticle Formation in Microemulsion by Means of Dielectric Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11110-11116. [PMID: 32878445 DOI: 10.1021/acs.langmuir.0c02128] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Dielectric spectroscopy was employed, for the first time, to monitor the formation process of silica nanoparticles in a nonionic surfactant-based microemulsion in situ and in real time. Two dominant relaxations were observed in the frequency range of 1 MHz-3 GHz during this process. The relaxation at the lower frequency range was confirmed to be mainly ascribed to interfacial polarization, whose relaxation parameters, together with the electrical property of the synthesis system, were used to characterize the evolution of this dynamic formation process. Four evolution stages are distinctively revealed, including an induction stage, a nucleation dominant stage, an early particle growth stage, and a late growth stage. The dynamic features at each evolution stages were discussed in terms of the dielectric characteristics of the system. It is strongly suggested that dielectric spectroscopy is an effective tool for the in situ mechanistic study of nanoparticle formation in microemulsion.
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Affiliation(s)
- Yanqiang Yu
- Department of Applied Chemistry, School of Natural Science, Anhui Agricultural University, Hefei, Anhui 230036, P. R. China
| | - Muhammad A Khan
- Department of Applied Chemistry, School of Natural Science, Anhui Agricultural University, Hefei, Anhui 230036, P. R. China
| | - Zhen Chen
- Department of Applied Chemistry, School of Natural Science, Anhui Agricultural University, Hefei, Anhui 230036, P. R. China
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Tarannum N, Divya, Gautam YK. Facile green synthesis and applications of silver nanoparticles: a state-of-the-art review. RSC Adv 2019; 9:34926-34948. [PMID: 35530673 PMCID: PMC9074700 DOI: 10.1039/c9ra04164h] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 10/07/2019] [Indexed: 12/12/2022] Open
Abstract
In the field of nanotechnology, the development of reliable and eco-friendly methods for the synthesis of NPs is crucial. The conventional methods for the synthesis of NPs are costly, toxic, and not ecofriendly. To overcome these issues, natural sources such as plant, bacteria, fungi, and biopolymers have been used to synthesize AgNPs. These natural sources act as reducing and capping agents. The shape, size, and applications of AgNPs are prominently affected by the reaction parameters under which they are synthesized. Accessible distributed data on the synthesis of AgNPs include the impact of different parameters (temperature and pH), characterization techniques (DLS, UV-vis, FTIR, XRD, SEM, TEM and EDX), properties and their applications. This review paper discusses all the natural sources such as plants, bacteria, fungi, and biopolymers that have been used for the synthesis of AgNPs in the last ten years. AgNPs synthesized by green methods have found potential applications in a wide spectrum of areas including drug delivery, DNA analysis and gene therapy, cancer treatment, antimicrobial agents, biosensors, catalysis, SERS and magnetic resonance imaging (MRI). The current limitations and future prospects for the synthesis of inorganic nanoparticles by green methods are also discussed herein.
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Affiliation(s)
- Nazia Tarannum
- Department of Chemistry, Chaudhary Charan Singh University Meerut 250004 India
| | - Divya
- Department of Chemistry, Chaudhary Charan Singh University Meerut 250004 India
| | - Yogendra K Gautam
- Smart Materials and Sensor Laboratory, Department of Physics, Chaudhary Charan Singh University Meerut 250004 India
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Dogra V, Kaur G, Jindal S, Kumar R, Kumar S, Singhal NK. Bactericidal effects of metallosurfactants based cobalt oxide/hydroxide nanoparticles against Staphylococcus aureus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 681:350-364. [PMID: 31117016 DOI: 10.1016/j.scitotenv.2019.05.078] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 05/06/2019] [Accepted: 05/06/2019] [Indexed: 06/09/2023]
Abstract
This work deals with the fabrication of metallosurfactants derived cobalt oxide and hydroxide nanosuspensions (Ns) by microemulsion method and their antimicrobial, cytotoxic, genotoxic, antioxidant and cytostatic activity have been investigated. The methodology used is environmentally compliant as no external reducing agent was used. Three metallosurfactants i.e. CoCTAC (Bishexadecyltrimethylammonium cobalt tetrachloride), CoDDA (Bisdodecylamine cobalt dichloride) and CoHEXA (bishexadecylamine cobalt dichloride) were used. Co-metallosurfactants were synthesized, characterized and were utilized for the preparation of mixed microemulsion to yield nanosuspensions. Nanoparticles prepared were characterized using Transmission electron microscopy (TEM), Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive X-ray Spectroscopy (EDS), X-ray Diffraction (XRD), UV-vis spectroscopy and Zeta potential. The nanoparticles were found to be spherical, with size range 1-5 nm, for all the three precursors. Further, their cytotoxicity, genotoxicity, and antimicrobial activity were investigated against Staphylococcus aureus (S. aureus). To evaluate these activities, techniques such as gram staining method, agar well diffusion, and colony forming unit count (CFU) were utilized. From all these experiments it was confirmed that CoCTAC Ns has maximum antimicrobial activity against multiple medicine resistant S. aureus. Circular dichroism and gel electrophoresis also validated the vigorous genotoxic effect of CoCTAC Ns. The antimicrobial activity trend investigated from CFU experiment was CoCTAC Ns (2 × 105 CFU/mL) > CoDDA Ns (17 × 105 CFU/mL) > CoHEXA Ns (46.5 × 105 CFU/mL). FESEM authenticated the effect of Co Ns on the morphology of S. aureus. Cell shrinkage, formation of holes, change of morphology, and cell wall rupturing was observed for all three cases but most significant antibacterial activity was noted for the case of CoCTAC Ns. In addition, antiproliferative activity was also examined against HepG2 cells (human liver cancer cell line) and HEK293 cells (human embryonic kidney cell line). After 70% confluency of cells, cobalt oxide/hydroxide Ns were added by diluting the nanosuspension in 0.2, 0.4, 0.5, and 0.8% V/V ratio to check the cell viability.
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Affiliation(s)
- Varsha Dogra
- Department of Environment Studies, Panjab University, Chandigarh, India
| | - Gurpreet Kaur
- Department of Chemistry, Centre of Advanced studies in Chemistry, Panjab University, Chandigarh, India.
| | - Shiwani Jindal
- Department of Chemistry, Centre of Advanced studies in Chemistry, Panjab University, Chandigarh, India
| | - Rajeev Kumar
- Department of Environment Studies, Panjab University, Chandigarh, India
| | - Sandeep Kumar
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science & Technology, Hisar 125 001, Haryana, India
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Shaparenko NO, Arymbaeva AT, Demidova MG, Plyusnin PE, Kolodin AN, Maksimovskii EA, Korol’kov IV, Bulavchenko AI. Emulsion Synthesis and Electrophoretic Concentration of Gold Nanoparticles in Sodium Bis(2-Ethylhexyl) Sulfosuccinate Solution in n-Decane. COLLOID JOURNAL 2019. [DOI: 10.1134/s1061933x1904015x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Arvinte A, Crudu IA, Doroftei F, Timpu D, Pinteala M. Electrochemical codeposition of silver-gold nanoparticles on CNT-based electrode and their performance in electrocatalysis of dopamine. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.10.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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9
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Pyne A, Kundu S, Banerjee P, Sarkar N. Unveiling the Aggregation Behavior of Doxorubicin Hydrochloride in Aqueous Solution of 1-Octyl-3-methylimidazolium Chloride and the Effect of Bile Salt on These Aggregates: A Microscopic Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3296-3306. [PMID: 29474788 DOI: 10.1021/acs.langmuir.8b00029] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this article, we have unveiled the aggregation behavior of a potent chemotherapeutic drug, doxorubicin hydrochloride (Dox) in a well-known imidazolium based surface active ionic liquid (SAIL), 1-octyl-3-methylimidazolium chloride (C8mimCl). The aggregates formed by Dox in C8mimCl have been characterized using dynamic light scattering (DLS), fluorescence lifetime imaging microscopy (FLIM), high-resolution transmission electron microscopy (HR-TEM), analytical transmission electron microscopy (analytical TEM), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), and Fourier-transform infrared spectroscopy (FTIR) measurements. It is found that Dox forms large spherical aggregates in the presence of C8mimCl SAIL. We have also explored the driving force behind this aggregation behavior of Dox in C8mimCl. Furthermore, it is observed that in the presence of a common bile salt, sodium cholate (NaCh), Dox/C8mimCl spherical aggregates disrupt to form rodlike fibrillar aggregates. Therefore, formation of spherical aggregates and also its disruption into rodlike fibrillar aggregates have been performed, and this is expected to open a new scope for the design of a new generation smart drug delivery system where the drug itself aggregates to form the delivery system.
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Affiliation(s)
- Arghajit Pyne
- Department of Chemistry , Indian Institute of Technology , Kharagpur 721302 , West Bengal , India
| | - Sangita Kundu
- Department of Chemistry , Indian Institute of Technology , Kharagpur 721302 , West Bengal , India
| | - Pavel Banerjee
- Department of Chemistry , Indian Institute of Technology , Kharagpur 721302 , West Bengal , India
| | - Nilmoni Sarkar
- Department of Chemistry , Indian Institute of Technology , Kharagpur 721302 , West Bengal , India
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10
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Kaur G, Dogra V, Kumar R, Kumar S, Singh K. Fabrication of iron oxide nanocolloids using metallosurfactant-based microemulsions: antioxidant activity, cellular, and genotoxicity toward Vitis vinifera. J Biomol Struct Dyn 2018; 37:892-909. [PMID: 29448887 DOI: 10.1080/07391102.2018.1442251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The present work aims at the fabrication of iron oxide nanocolloids using biocompatible microemulsion and their cytotoxic, genotoxic effect on Vitis vinifera plant has been evaluated. The three iron-based metallosurfactant complexes were synthesized. Nanosuspensions (Ns) were prepared using microemulsion technique and for the purpose, the microemulsion was prepared using oleic acid, butanol, tween 80 and as synthesized iron metallosurfactant. In this technique, no additional capping agent and/or reducing agent was added. Tween 80 which is a biocompatible surfactant acted as a reducing agent as well as stabilizing for the iron oxide Ns. Characterization of Ns's was done using TEM, FESEM, EDX, XRD, AFM, and zeta potential. Mixed type of iron oxide nanoparticles i.e. magnetite (Fe3O4), and maghemite (Fe2O3) with a size range of 1-16 nm was found to be present in the nanosuspensions prepared from all the three precursors. The antioxidant activity of the Fe Ns was also confirmed using DPPH assay, with order of activity FeDDA > FeCTAC > FeHEXA. The cellular toxicity of Ns was evaluated by observing the morphological changes on V. vinifera plant (petiole) using a light microscope. Further, the interactions of iron oxide Ns with V. vinifera's DNA (plant-DNA) was assessed using circular dichroism (CD) and gel electrophoresis. For the case of FeCTAC Ns, a decrease in the intensity of bands was observed indicating fragmentation or adduct formation resulting in DNA damage. In the case of FeDDA, a modest decrease in the intensity of bands was observed. However, for FeHEXA Ns, complete neutralization of bands was confirmed implying maximum damage to the plant DNA. CD, gel electrophoresis and antioxidant activity confirmed that FeHEXA Ns were most toxic and FeDDA Ns were safest among the three as-fabricated nanosuspensions.
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Affiliation(s)
- Gurpreet Kaur
- a Department of Chemistry and Centre of Advanced Studies in Chemistry , Panjab University , Chandigarh , India
| | - Varsha Dogra
- b Department of Environment Studies , Panjab University , Chandigarh , India
| | - Rajeev Kumar
- b Department of Environment Studies , Panjab University , Chandigarh , India
| | - Sandeep Kumar
- c Department of Bio and Nano Technology , Guru Jambheshwar University of Science & Technology , Hisar , Haryana 125001 , India
| | - Kashmir Singh
- d Department of Biotechnology , Panjab University , Chandigarh , India
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11
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Bulavchenko AI, Arymbaeva AT, Demidova MG, Popovetskiy PS, Plyusnin PE, Bulavchenko OA. Synthesis and Concentration of Organosols of Silver Nanoparticles Stabilized by AOT: Emulsion Versus Microemulsion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2815-2822. [PMID: 29376385 DOI: 10.1021/acs.langmuir.7b04071] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, we tried to combine the advantages of microemulsion and emulsion synthesis to obtain stable concentrated organosols of Ag nanoparticles, promising liquid-phase materials. Starting reagents were successively introduced into a micellar solution of sodium bis-(2-ethylhexyl)sulfosuccinate (AOT) in n-decane in the dynamic reverse emulsion mode. During the contact of the phases, Ag+ passes into micelles and Na+ passes into emulsion microdroplets through the cation exchange AOTNaOrg + AgNO3Aq = AOTAgOrg + NaNO3Aq. High concentrations of NaNO3 and hydrazine in the microdroplets favor an osmotic outflow of water from the micelles, which reduces their polar cavities to ∼2 nm. As a result, silver ions are contained in the micelles, and the reducing agent is present mostly in emulsion microdroplets. The reagents interact in the polar cavities of micelles to form ∼7 nm Ag nanoparticles. The produced nanoparticles are positively charged, which permitted their electrophoretic concentration to obtain liquid concentrates (up to 30% Ag) and a solid Ag-AOT composite (up to 75% Ag). Their treatment at 250 °C leads to the formation of conductive films (180 mOhm per square). The developed technique makes it possible to increase the productivity of the process by ∼30 times and opens up new avenues of practical application for the well-studied microemulsion synthesis.
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Affiliation(s)
- Alexander I Bulavchenko
- Nikolaev Institute of Inorganic Chemistry SB RAS , 3 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Aida T Arymbaeva
- Nikolaev Institute of Inorganic Chemistry SB RAS , 3 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Marina G Demidova
- Nikolaev Institute of Inorganic Chemistry SB RAS , 3 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Pavel S Popovetskiy
- Nikolaev Institute of Inorganic Chemistry SB RAS , 3 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Pavel E Plyusnin
- Nikolaev Institute of Inorganic Chemistry SB RAS , 3 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Olga A Bulavchenko
- Boreskov Institute of Catalysis SB RAS , 5 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia
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12
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Saravanan M, Gopinath V, Chaurasia MK, Syed A, Ameen F, Purushothaman N. Green synthesis of anisotropic zinc oxide nanoparticles with antibacterial and cytofriendly properties. Microb Pathog 2017; 115:57-63. [PMID: 29248514 DOI: 10.1016/j.micpath.2017.12.039] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 12/11/2017] [Accepted: 12/13/2017] [Indexed: 12/13/2022]
Abstract
Zinc oxide nanoparticles (ZnONPs) exhibit abundant biomedical applications. Anisotropic ZnONPs with a defined shape and size were synthesized using Bacillus megaterium (NCIM 2326) cell free extract as a bio-reductant. The study investigated the multidimensional effect of ZnONPs on Helicobacter pylori strains and assessed its biosafety in normal human mesenchymal stem cells (hMSc). The highly stable ZnONPs were produced using B. megaterium and Zinc nitrate as a precursor. The phase of ZnONPs formation and structural characterization were performed by UV- visible (UV-Vis), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and Field Emission Scanning electron microscopy (FESEM) analysis. Furthermore, the ZnONPs exhibited higher biocompatibility against human mesenchymal stem cells (hMSC) and proved to be potentially safe in mammalian cells. Corroborating the current investigation, we described the anti-H. Pylori dosage of ZnONPs was safe to hMSC and could efficiently use as nano-antibiotic.
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Affiliation(s)
- M Saravanan
- Institute of Biomedical Sciences, College of Health Sciences, Mekelle University, Ethiopia; Department of Biotechnology, Faculty of Science and Humanities, SRM University, Kattankulathur, 603203, India
| | - V Gopinath
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Malaysia.
| | - Mukesh Kumar Chaurasia
- Department of Biotechnology, Faculty of Science and Humanities, SRM University, Kattankulathur, 603203, India
| | - Asad Syed
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
| | - Fuad Ameen
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
| | - N Purushothaman
- Department of Genetic Engineering and SRM Research Institue, SRM University, Kattankulathur, 603203, India
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13
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DNA interaction, anti-proliferative effect of copper oxide nanocolloids prepared from metallosurfactant based microemulsions acting as precursor, template and reducing agent. Int J Pharm 2017; 535:95-105. [PMID: 29102701 DOI: 10.1016/j.ijpharm.2017.10.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 09/23/2017] [Accepted: 10/31/2017] [Indexed: 11/20/2022]
Abstract
In the present study, we have synthesized mixed cuprous/copper oxide nanosuspensions by metallosurfactant based microemulsion technique. Three metallosurfactants were synthesized which includes two non-ionic double chained metallosurfactants with C12, C16 chains with coordinated copper i.e. Cudda and Cuhexa, respectively. Another cationic double chained metallosurfactant with loosely bound metal (Cuctac) was also prepared. The prepared metallocomplexes were characterized using FTIR, elemental analysis, and NMR. The effect of the position of metallosurfactant in microemulsion on the fabrication and properties of nanosuspensions was elucidated. In this method, no external reducing agent and capping agent were added and tween 80 acted both as reducing and stabilizing agent for the nanoparticles. The synthesized nanoparticles were characterized and it was observed that mixed copper and cuprous oxide particles are present in colloidal suspension for all the three studied metallosurfactants. The kinetics of formation of mixed copper/cuprous oxide nanosuspensions (Ns) and their stability was estimated using Uv-visible spectroscopy. Further, the binding and interactions of copper nanosuspensions with calf Thymus DNA (CT-DNA) were assessed using Uv-vis spectroscopy, circular dichroism and gel electrophoresis. Additionally, the antioxidant activity of the Cu Ns was checked using DPPH assay. The role of positive charge on nanoparticles as evaluated from Zeta potential was responsible for DNA affinity. The DNA conformational changes in the presence of nanosuspensions and relevant scavengers were investigated. Further, the anti-proliferative activity of copper Ns was assessed using HeLa cells and Cuhexa derived Ns were proved to be active with highest activity at a low concentration and were nontoxic towards normal cell lines. In summary, this work demonstrates a softer approach for the synthesis of copper nanosuspensions with a size range of 2-5 nm and evaluated the role of type and structure of metallosurfactant on size, stability of particles and anti-proliferative activity.
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Biausque GM, Laveille PV, Anjum DH, Zhang B, Zhang X, Caps V, Basset JM. One-Pot Synthesis of Size- and Composition-Controlled Ni-Rich NiPt Alloy Nanoparticles in a Reverse Microemulsion System and Their Application. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30643-30653. [PMID: 28812875 DOI: 10.1021/acsami.7b08201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bimetallic nanoparticles have been the subject of numerous research studies in the nanotechnology field, in particular for catalytic applications. Control of the size, morphology, and composition has become a key challenge due to the relationship between these parameters and the catalytic behavior of the particles in terms of activity, selectivity, and stability. Here, we present a one-pot air synthesis of 2 nm Ni9Pt1 nanoparticles with a narrow size distribution. Control of the size and composition of the alloy particles is achieved at ambient temperature, in the aqueous phase, by the simultaneous reduction of nickel and platinum precursors with hydrazine, using a reverse microemulsion system. After deposition on an alumina support, this Ni-rich nanoalloy exhibits unprecedented stability under the harsh conditions of methane dry reforming.
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Affiliation(s)
- Gregory M Biausque
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
| | - Paco V Laveille
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
| | - Dalaver H Anjum
- Imaging & Characterization Core Lab, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
| | - Bei Zhang
- Imaging & Characterization Core Lab, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
| | - Xixiang Zhang
- Imaging & Characterization Core Lab, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
| | - Valérie Caps
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
| | - Jean-Marie Basset
- KAUST Catalysis Center, King Abdullah University of Science and Technology , Thuwal 23955-6900, Saudi Arabia
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15
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Kundu K, Das A, Bardhan S, Chakraborty G, Ghosh D, Kar B, Saha SK, Senapati S, Mitra RK, Paul BK. The mixing behaviour of anionic and nonionic surfactant blends in aqueous environment correlates in fatty acid ester medium. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.05.078] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Du C, He W, Yin T, Shen W. Volumetric properties of water/AOT/isooctane microemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15135-15142. [PMID: 25489979 DOI: 10.1021/la5041344] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The densities of AOT/isooctane micelles and water/AOT/isooctane microemulsions with the molar ratios R of water to AOT being 2, 8, 10, 12, 16, 18, 20, 25, 30, and 40 were measured at 303.15 K. The apparent specific volumes of AOT and the quasi-component water/AOT at various concentrations were calculated and used to estimate the volumetric properties of AOT and water in the droplets and in the continuous oil phase, to discuss the interaction between the droplets, and to determine the critical micelle concentration and the critical microemulsion concentrations. A thermodynamic model was proposed to analysis the stability boundary of the microemulsion droplets, which confirms the maximum value of R being about 65 for the stable AOT/water/isooctane microemulsion droplets.
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Affiliation(s)
- Changfei Du
- School of Chemistry and Molecular Engineering, East China University of Science and Technology , Shanghai 200237, China
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17
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Serrà A, Gómez E, Vallés E. One-step electrodeposition from ionic liquid and water as a new method for 2D composite preparation. Electrochem commun 2014. [DOI: 10.1016/j.elecom.2014.06.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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18
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Knaapila M, Fonseca SM, Stewart B, Torkkeli M, Perlich J, Pradhan S, Scherf U, Castro RAE, Burrows HD. Nanostructuring of the conjugated polyelectrolyte poly[9,9-bis(4-sulfonylbutoxyphenyl)fluorene-2,7-diyl-2,2'-bithiophene] in liquid crystalline C12E4 in bulk water and aligned thin films. SOFT MATTER 2014; 10:3103-3111. [PMID: 24695747 DOI: 10.1039/c4sm00092g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the conjugated polyelectrolyte 12 mM poly[9,9-bis(4-sulfonylbutoxyphenyl) fluorene-2,7-diyl-2,2'-bithiophene] (PBS-PF2T) mixed in concentrated aqueous 680 mM tetraethylene glycol monododecyl ether (C12E4) in bulk and thin films. A blue-shift in the fluorescence spectrum demonstrates breakup of PBS-PF2T aggregates in bulk aqueous C12E4. Small-angle X-ray scattering data indicate that this mixture follows a very similar phase behaviour to binary mixtures of a pure surfactant with water, including a micellar phase below about 20 °C, a lamellar phase in between about 20 and 70 °C and a proposed coexistence of water and the liquid surfactant solution above 70 °C. Molecular dynamics simulations reproduce these transitions and suggest that PBS-PF2T is incorporated into the surfactant headgroup region, and is, on average, perpendicular to the alkyl chains. In wet thin films, grazing-incidence small-angle X-ray scattering shows that the phase window for the lamellar phase becomes much narrower, located at about 30-34 °C. Weakly ordered phases exist both below and above these temperatures. These phases are isotropic, but lamellae become aligned in a stacked manner on the surface whether approached from low or high temperatures. Dry films are disordered but can be reversibly ordered and disordered and aligned and misaligned by maintaining the temperature at 30-34 °C and switching relative outside humidity between 32% and 100%.
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Affiliation(s)
- M Knaapila
- Physics Department, Institute for Energy Technology, NO-2027 Kjeller, Norway.
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19
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Zalakain I, Politakos N, Ramos JA, Fernandez R, Etxeberria H, Mondragon I, Corcuera MA, Eceiza A. Synthesis and incorporation of dodecanethiol capped silver nanoparticles into poly(styrene-b-isoprene-b-styrene) block copolymer and their influence in the morphology. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.06.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Scaravelli RCB, Dazzi RL, Giacomelli FC, Machado G, Giacomelli C, Schmidt V. Direct synthesis of coated gold nanoparticles mediated by polymers with amino groups. J Colloid Interface Sci 2013; 397:114-21. [DOI: 10.1016/j.jcis.2013.01.058] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 01/19/2013] [Accepted: 01/21/2013] [Indexed: 12/23/2022]
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21
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Li HJ, Zhang AQ, Hu Y, Sui L, Qian DJ, Chen M. Large-scale synthesis and self-organization of silver nanoparticles with Tween 80 as a reductant and stabilizer. NANOSCALE RESEARCH LETTERS 2012; 7:612. [PMID: 23127253 PMCID: PMC3503618 DOI: 10.1186/1556-276x-7-612] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Accepted: 10/25/2012] [Indexed: 05/20/2023]
Abstract
Tween 80 (polysorbate 80) has been used as a reducing agent and protecting agent to prepare stable water-soluble silver nanoparticles on a large scale through a one-pot process, which is simple and environmentally friendly. Silver ions can accelerate the oxidation of Tween 80 and then get reduced in the reaction process. The well-ordered arrays such as ribbon-like silver nanostructures could be obtained by adjusting the reaction conditions. High-resolution transmission electron microscopy confirms that ribbon-like silver nanostructures (approximately 50 nm in length and approximately 2 μm in width) are composed of a large number of silver nanocrystals with a size range of 2 to 3 nm. In addition, negative absorbance around 320 nm in the UV-visible spectra of silver nanoparticles has been observed, probably owing to the instability of nanosized silver colloids.
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Affiliation(s)
- Hui-Jun Li
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
- Advanced Materials Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
| | - An-Qi Zhang
- Department of Materials Science, Fudan University, Shanghai 200433, People’s Republic of China
| | - Yang Hu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
- Advanced Materials Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
| | - Li Sui
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, People’s Republic of China
| | - Dong-Jin Qian
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
- Advanced Materials Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
| | - Meng Chen
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China
- Advanced Materials Laboratory, Fudan University, Shanghai 200433, People’s Republic of China
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22
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Kundu K, Guin G, Paul BK. Interfacial composition, thermodynamic properties, and structural parameters of water-in-oil microemulsions stabilized by 1-pentanol and mixed surfactants. J Colloid Interface Sci 2012; 385:96-110. [DOI: 10.1016/j.jcis.2012.06.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 06/19/2012] [Accepted: 06/20/2012] [Indexed: 11/28/2022]
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23
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Synthesis of worm like silver nanoparticles in methyl cellulose polymeric matrix and its catalytic activity. Carbohydr Polym 2012; 89:830-5. [DOI: 10.1016/j.carbpol.2012.04.017] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 04/06/2012] [Accepted: 04/07/2012] [Indexed: 11/21/2022]
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24
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Habibi B, Jahanbakhshi M, Pournaghi-Azar MH. Voltammetric and amperometric determination of hydrogen peroxide using a carbon-ceramic electrode modified with a nanohybrid composite made from single-walled carbon nanotubes and silver nanoparticles. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0775-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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25
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Angelescu DG, Vasilescu M, Anastasescu M, Baratoiu R, Donescu D, Teodorescu VS. Synthesis and association of Ag(0) nanoparticles in aqueous Pluronic F127 triblock copolymer solutions. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2011.11.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Sinha B, Dan A, Wongkamlue A, Chanakul A, Charinpanitkul T, Moulik S, Panda A. Synthesis and characterization of dispersions of ZnCrO4 prepared in AOT stabilized water/heptane microemulsion. J Mol Liq 2011. [DOI: 10.1016/j.molliq.2011.09.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Solanki JN, Murthy ZVP. Controlled Size Silver Nanoparticles Synthesis with Water-in-Oil Microemulsion Method: A Topical Review. Ind Eng Chem Res 2011. [DOI: 10.1021/ie201649x] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jignasa N. Solanki
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat Surat-395 007, Gujarat, India
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28
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Liu SS, Chen YZ, De Zhang L, Hua GM, Xu W, Li N, Zhang Y. Enhanced removal of trace Cr(VI) ions from aqueous solution by titanium oxide-Ag composite adsorbents. JOURNAL OF HAZARDOUS MATERIALS 2011; 190:723-728. [PMID: 21514991 DOI: 10.1016/j.jhazmat.2011.03.114] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 03/29/2011] [Accepted: 03/29/2011] [Indexed: 05/30/2023]
Abstract
Titanium oxide-Ag composite (TOAC) adsorbents were prepared by a facile solution route with Ag nanoparticles being homogeneously dispersed on layered titanium oxide materials. The as-synthesized TOAC exhibited a remarkable capability for trace Cr(VI) removal from an aqueous solution, where the concentration of Cr(VI) could be decreased to a level below 0.05 mg/L within 1h. We have systematically investigated the factors that influenced the adsorption of Cr(VI), for example, the pH value of the solution, and the contact time of TOAC with Cr(VI). We found that the adsorption of Cr(VI) was strongly pH-dependent. The adsorption behavior of Cr(VI) onto TOAC fitted well the Langmuir isotherm and a maximum adsorption capacity of Cr(VI) as 25.7 mg/g was achieved. The adsorption process followed the pseudo-second-order kinetic model, which implied that the adsorption was composed of two steps: the adsorption of Cr(VI) ions onto TOAC followed by the reduction of Cr(VI) to Cr(III) by Ag nanoparticles. Our results revealed that TOAC with high capacity of Cr(VI) removal had promising potential for wastewater treatment.
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Affiliation(s)
- Si Si Liu
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructure, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China
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29
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Magno LM, Angelescu DG, Sigle W, Stubenrauch C. Microemulsions as reaction media for the synthesis of Pt nanoparticles. Phys Chem Chem Phys 2011; 13:3048-58. [DOI: 10.1039/c0cp01085e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Shameli K, Ahmad MB, Yunus WMZW, Ibrahim NA, Gharayebi Y, Sedaghat S. Synthesis of silver/montmorillonite nanocomposites using γ-irradiation. Int J Nanomedicine 2010; 5:1067-77. [PMID: 21170354 PMCID: PMC3000206 DOI: 10.2147/ijn.s15033] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Silver nanoparticles (Ag-NPs) were synthesized into the interlamellar space of montmorillonite (MMT) by using the γ-irradiation technique in the absence of any reducing agent or heat treatment. Silver nitrate and γ-irradiation were used as the silver precursor and physical reducing agent in MMT as a solid support. The MMT was suspended in the aqueous AgNO(3) solution, and after the absorption of silver ions, Ag(+) was reduced using the γ-irradiation technique. The properties of Ag/MMT nanocomposites and the diameters of Ag-NPs were studied as a function of γ-irradiation doses. The interlamellar space limited particle growth (d-spacing [d(s)] = 1.24-1.42 nm); powder X-ray diffraction and transmission electron microscopy (TEM) measurements showed the production of face-centered cubic Ag-NPs with a mean diameter of about 21.57-30.63 nm. Scanning electron microscopy images indicated that there were structure changes between the initial MMT and Ag/MMT nanocomposites under the increased doses of γ-irradiation. Furthermore, energy dispersive X-ray fluorescence spectra for the MMT and Ag/ MMT nanocomposites confirmed the presence of elemental compounds in MMT and Ag-NPs. The results from ultraviolet-visible spectroscopy and TEM demonstrated that increasing the γ-irradiation dose enhanced the concentration of Ag-NPs. In addition, the particle size of the Ag-NPs gradually increased from 1 to 20 kGy. When the γ-irradiation dose increased from 20 to 40 kGy, the particle diameters decreased suddenly as a result of the induced fragmentation of Ag-NPs. Thus, Fourier transform infrared spectroscopy suggested that the interactions between Ag-NPs with the surface of MMT were weak due to the presence of van der Waals interactions. The synthesized Ag/MMT suspension was found to be stable over a long period of time (ie, more than 3 months) without any sign of precipitation.
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Affiliation(s)
- Kamyar Shameli
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Selangor, Malaysia.
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31
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Angelescu DG, Vasilescu M, Somoghi R, Donescu D, Teodorescu VS. Kinetics and optical properties of the silver nanoparticles in aqueous L64 block copolymer solutions. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.06.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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32
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Electrodeposition of silver nanoparticles on a zinc oxide film: improvement of amperometric sensing sensitivity and stability for hydrogen peroxide determination. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0356-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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33
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Harada M, Saijo K, Sakamoto N, Einaga H. Small-angle X-ray scattering study of metal nanoparticles prepared by photoreduction in aqueous solutions of sodium dodecyl sulfate. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.04.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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Song Y, Cui K, Wang L, Chen S. The electrodeposition of Ag nanoparticles on a type I collagen-modified glassy carbon electrode and their applications as a hydrogen peroxide sensor. NANOTECHNOLOGY 2009; 20:105501. [PMID: 19417520 DOI: 10.1088/0957-4484/20/10/105501] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Silver nanoparticles (Ag NPs) attached to type I collagen-modified glassy carbon (GC) electrodes were successfully synthesized by the electrodepositing method. Atomic force microscopy images showed that many Ag NPs with homogeneous size were formed and uniformly distributed on the type I collagen/GC electrode. The amount, size and distribution of Ag NPs could be controlled by the collagen. The results of electrochemical experiments showed that Ag NPs had an excellent catalytic ability for the reduction of hydrogen peroxide (H(2)O(2)), suggesting that they could be used as a sensor to determine H(2)O(2). The good catalytic activity of the Ag NPs was ascribed to the type I collagen that resulted in the homogeneous distribution of Ag NPs with small size. The effects of type I collagen concentration and electrodeposition time on Ag NPs were investigated. When the Ag NPs were used as a sensor to determine H(2)O(2), the sensor could achieve 95% of the steady-state current in less than 2 s and had a linear range of 5.0 microM to 40.6 mM and a 0.7 microM detection limit of H(2)O(2) at a signal-to-noise ratio of 3.
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Affiliation(s)
- Yonghai Song
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
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35
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Yuan P, Zhuo Y, Chai Y, Ju H. Dendritic Silver/Silicon Dioxide Nanocomposite Modified Electrodes for Electrochemical Sensing of Hydrogen Peroxide. ELECTROANAL 2008. [DOI: 10.1002/elan.200804266] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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de Silva RM, Palshin V, de Silva KMN, Henry LL, Kumar CSSR. A new role for surfactants in the formation of cobalt nanoparticles. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b714456c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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37
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Jiang JZ, Wei YA, Cai C. Copper- and ligand-free Sonogashira reaction catalyzed by palladium in microemulsion: Effects of surfactant and alcohol. J Colloid Interface Sci 2007; 312:439-43. [PMID: 17451733 DOI: 10.1016/j.jcis.2007.03.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Revised: 03/04/2007] [Accepted: 03/09/2007] [Indexed: 11/19/2022]
Abstract
A rapid copper- and ligand-free Sonogashira reaction was performed in an oil-in-water microemulsion. Palladium nanoparticles can be in situ formed in the microemulsion without other reductants. The microemulsion containing in situ-formed nano-Pd is an efficient system for the Sonogashira reaction. The reactions were faster in the microemulsion than in micelles. The effects of surfactant, alcohol, and temperature are discussed. Excellent yield of the Sonogashira reaction catalyzed by 0.5 mol% palladium could be achieved at 80 degrees C within 2 min.
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Affiliation(s)
- Jian-Zhong Jiang
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, PR China
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38
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Tatarchuk VV, Bulavchenko AI, Druzhinina IA. Dissolution kinetics of silver metal nanoparticles in their reaction with nitric acid in an reverse micelle solution of AOT. RUSS J INORG CHEM+ 2007. [DOI: 10.1134/s0036023607080207] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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40
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Jiang JZ, Cai C. Copper- and ligand-free Sonogashira reaction catalyzed by palladium in microemulsion. J Colloid Interface Sci 2007; 307:300-3. [PMID: 17141262 DOI: 10.1016/j.jcis.2006.10.087] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2006] [Revised: 10/28/2006] [Accepted: 10/30/2006] [Indexed: 11/20/2022]
Abstract
An oil-in-water microemulsion containing PdCl2 and NaOH can be used as an effective catalyst system for rapid copper- and ligand-free Sonogashira reaction of aryl halides and phenylacetylene. Excellent yield of the Sonogashira reaction catalyzed by 0.5 mol% palladium could be achieved within 5 min. The types of base have an intense influence on the reaction. The reaction rate was increased with increased aqueous content in the microemulsions, and dispersed palladium nanoparticles can be in situ formed without other reductants.
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Affiliation(s)
- Jian-Zhong Jiang
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing, 210094, China
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41
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Wikander K, Hungria AB, Midgley PA, Palmqvist AEC, Holmberg K, Thomas JM. Incorporation of platinum nanoparticles in ordered mesoporous carbon. J Colloid Interface Sci 2007; 305:204-8. [PMID: 17069827 DOI: 10.1016/j.jcis.2006.09.077] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2006] [Revised: 09/27/2006] [Accepted: 09/28/2006] [Indexed: 11/15/2022]
Abstract
Platinum nanoparticles were incorporated within the pore system of ordered mesoporous carbon (OMC) by impregnating the carbon with a water-in-oil (w/o) microemulsion containing dissolved platinum salt followed by reduction of the platinum ions in situ inside the carbon pore system. The procedure provides preparation of metallic nanoparticles from hydrophilic precursors inside the hydrophobic carbon support structure with simultaneous control of the maximum metal particle size. Electron tomography was used to verify the presence of platinum nanoparticles inside the carbon material.
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Affiliation(s)
- Kjell Wikander
- Division of Applied Surface Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
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42
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Concentrated reverse micelles in a random graft block copolymer system: structure and in-situ synthesis of silver nanoparticles. Colloid Polym Sci 2006. [DOI: 10.1007/s00396-006-1612-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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43
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44
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Electrodeposition of silver–DNA hybrid nanoparticles for electrochemical sensing of hydrogen peroxide and glucose. Electrochem commun 2006. [DOI: 10.1016/j.elecom.2006.05.013] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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45
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Jiang JZ, Cai C. In situ formation of dispersed palladium nanoparticles in microemulsion: Efficient reaction system for ligand-free Heck reaction. J Colloid Interface Sci 2006; 299:938-43. [PMID: 16631192 DOI: 10.1016/j.jcis.2006.02.035] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2006] [Revised: 02/16/2006] [Accepted: 02/17/2006] [Indexed: 10/24/2022]
Abstract
The ligand-free Heck reaction catalyzed by Pd(OAc)2 performed well in a TX10 oil-in-water microemulsion. TEM proved in situ formation distributed palladium nanoparticles in the microemulsion. The role of TX10 in the reaction system is the palladium nanoparticles reducing agent and stabilizer. The effect of reaction parameters on the Heck reaction conversion were discussed. The results indicated that the aqueous phase concentration, the base concentration, and the temperature played key roles in the conversion of the reaction. Iodobenzene was converted to the corresponding trans-stilbene quantitatively within 90-150 min. Therefore, the heptane/TX 10/butanol/water/propylene glycol microemulsion containing in situ formed palladium nanoparticles was a very efficient catalyst system for the ligand-free Heck reaction.
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Affiliation(s)
- Jian-Zhong Jiang
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing, 210094, China
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46
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Chen CH, Sarma LS, Wang GR, Chen JM, Shih SC, Tang MT, Liu DG, Lee JF, Chen JM, Hwang BJ. Formation of Bimetallic Ag−Pd Nanoclusters via the Reaction between Ag Nanoclusters and Pd2+ Ions. J Phys Chem B 2006; 110:10287-95. [PMID: 16722731 DOI: 10.1021/jp061095f] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have investigated systematically the mechanistic aspects of the Ag-Pd bimetallic cluster formation within sodium bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelles by using in-situ X-ray absorption spectroscopy (XAS). A two-step sequential reduction method is employed for the synthesis of Ag-Pd bimetallic clusters. The first step involves preparation of Ag nanoclusters, by mixing the Ag+ ions containing the AOT microemulsion system with a reducing agent hydrazine (N2H4) containing the AOT microemulsion system. In the second step, the addition of Pd2+ ions to Ag nanoclusters led to the formation of Ag-Pd bimetallic clusters via the reaction between Ag nanoclusters and Pd2+ ions in AOT reverse micelles. The reduction of silver ions and the formation of corresponding Ag nanoclusters are monitored as a function of the dosage of the reducing agent, hydrazine. In-situ XAS allowed probing of the reaction between Ag nanoclusters and Pd2+ ions during the formation of Ag-Pd bimetallic clusters. Analysis of Ag and Pd K-edge XAS spectra reveals that in the final stage Ag-Pd clusters, in which "Ag" atoms prefer to be surrounded by "Pd" and "Pd" atoms prefer to be surrounded by "Pd", were formed. On the basis of XAS results presented here, we are able to propose a structural model for each step so that this work provides a detailed insight into the mechanism of nucleation and growth of Ag-Pd bimetallic clusters. We also discussed the atomic distribution of Ag and Pd atoms in Ag-Pd bimetallic clusters based on the calculated XAS structural parameters.
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Affiliation(s)
- Ching-Hsiang Chen
- Nanoelectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan, ROC
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