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Regular arrangement of Pt nanoparticles on S-layer proteins isolated from Lactobacillus kefiri: synthesis and catalytic application. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2018.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Vertical Alignment of Size-Controlled Self-Assembled Diphenylalanine Peptide Nanotubes Using Polyethersulfone Hollow Fiber Membranes On Silicon. Int J Pept Res Ther 2019. [DOI: 10.1007/s10989-018-9725-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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3
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Oracko T, Jaquish R, Losovyj YB, Morgan DG, Pink M, Stein BD, Doluda VY, Tkachenko OP, Shifrina ZB, Grigoriev ME, Sidorov AI, Sulman EM, Bronstein LM. Metal-Ion Distribution and Oxygen Vacancies That Determine the Activity of Magnetically Recoverable Catalysts in Methanol Synthesis. ACS APPLIED MATERIALS & INTERFACES 2017; 9:34005-34014. [PMID: 28910529 DOI: 10.1021/acsami.7b11643] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Here, we report on the development of novel Zn-, Zn-Cr-, and Zn-Cu-containing catalysts using magnetic silica (Fe3O4-SiO2) as the support. Transmission electron microscopy, powder X-ray diffraction, and X-ray photoelectron spectroscopy (XPS) showed that the iron oxide nanoparticles are located in mesoporous silica pores and the magnetite (spinel) structure remains virtually unchanged despite the incorporation of Zn and Cr. According to XPS data, the Zn and Cr species are intermixed within the magnetite structure. In the case of the Zn-Cu-containing catalysts, a separate Cu2O phase was also observed along with the spinel structure. The catalytic activity of these catalysts was tested in methanol synthesis from syngas (CO + H2). The catalytic experiments showed an improved catalytic performance of Zn- and Zn-Cr-containing magnetic silicas compared to that of the ZnO-SiO2 catalyst. The best catalytic activity was obtained for the Zn-Cr-containing magnetic catalyst prepared with 1 wt % Zn and Cr each. X-ray absorption spectroscopy demonstrated the presence of oxygen vacancies near Fe and Zn in Zn-containing, and even more in Zn-Cr-containing, magnetic silica (including oxygen vacancies near Cr ions), revealing a correlation between the catalytic properties and oxygen vacancies. The easy magnetic recovery, robust synthetic procedure, and high catalytic activity make these catalysts promising for practical applications.
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Affiliation(s)
| | | | | | | | | | | | - Valentin Yu Doluda
- Department of Biotechnology and Chemistry, Tver State Technical University , 22 A. Nikitina Street, Tver 170026, Russia
| | - Olga P Tkachenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , 47 Leninsky Pr., Moscow 119991, Russia
| | - Zinaida B Shifrina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , 28 Vavilov Street, Moscow 119991, Russia
| | - Maxim E Grigoriev
- Department of Biotechnology and Chemistry, Tver State Technical University , 22 A. Nikitina Street, Tver 170026, Russia
| | - Alexander I Sidorov
- Department of Biotechnology and Chemistry, Tver State Technical University , 22 A. Nikitina Street, Tver 170026, Russia
| | - Esther M Sulman
- Department of Biotechnology and Chemistry, Tver State Technical University , 22 A. Nikitina Street, Tver 170026, Russia
| | - Lyudmila M Bronstein
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , 28 Vavilov Street, Moscow 119991, Russia
- Faculty of Science, Department of Physics, King Abdulaziz University , Jeddah 21589, Saudi Arabia
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Emtiazi G, Zohrabi T, Lee LY, Habibi N, Zarrabi A. Covalent diphenylalanine peptide nanotube conjugated to folic acid/magnetic nanoparticles for anti-cancer drug delivery. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.06.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Spinel cobalt manganese oxide nano-composites grown hydrothermally on nanosheets for enhanced photocatalytic mineralization of Acid Black 1 textile dye: XRD, FTIR, FESEM, EDS and TOC studies. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1104-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Polyelectrolyte multilayers and capsules: S-layer functionalization for improving stability and biocompatibility. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2016.12.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zohrabi T, Habibi N, Zarrabi A, Fanaei M, Lee LY. Diphenylalanine peptide nanotubes self-assembled on functionalized metal surfaces for potential application in drug-eluting stent. J Biomed Mater Res A 2016; 104:2280-90. [PMID: 27119433 DOI: 10.1002/jbm.a.35764] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 04/10/2016] [Accepted: 04/25/2016] [Indexed: 11/07/2022]
Abstract
This study focuses on the potential of diphenylalanine self-assembled peptide nanotubes (FF Nts) for delivery of flufenamic acid (FA) from metal implants. Self-assembly of FF Nts was studied in solution and on surfaces of glass, silicone and gold substrates. FA was loaded inside the shell of FF Nts and subsequently FF/FA Nts were attached to gold surfaces. The substrate were characterized by Field Emission Scanning Electron Microscopy (FESEM), fluorescence microscopy, confocal microscopy, and UV-vis spectroscopy. Release of FA from FF Nts were investigated by immersing coated metal substrates in phosphate-buffered saline for 12 days. Self-assembly of FF in water and solvent resulted in formation of nanotubes, which efficiently loaded 98% of FA with concentration of 20 µg/mL. FESEM images confirmed successful attachment of FF/FA Nts to functionalized gold substrates. In vitro release studies indicated using FF Nts has prolonged the release rate of FA for several days. Biocompatibility studied confirmed more than 50% of the cells were alive in concentration of 250-1000 µg/mL of FF Nts thus suggesting the potential of peptide based self-assemble nanostructures as an alternate system for polymer coating in drugs eluting stents. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 2280-2290, 2016.
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Affiliation(s)
- Tayebeh Zohrabi
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Iran
| | - Neda Habibi
- Nanotechnology and Advanced Material Institute, Isfahan University of Technology, Iran
| | - Ali Zarrabi
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Iran
| | - Maryam Fanaei
- Department of Biology, Faculty of Science, University of Isfahan, Iran
| | - Lai Yeng Lee
- School of Chemical Engineering and Advanced Materials, Newcastle University, United Kingdom
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Baird N, Losovyj Y, Yuzik-Klimova EY, Kuchkina NV, Shifrina ZB, Pink M, Stein BD, Morgan DG, Wang T, Rubin MA, Sidorov AI, Sulman EM, Bronstein LM. Zinc-Containing Magnetic Oxides Stabilized by a Polymer: One Phase or Two? ACS APPLIED MATERIALS & INTERFACES 2016; 8:891-9. [PMID: 26673012 DOI: 10.1021/acsami.5b10302] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Here we developed a new family of Zn-containing magnetic oxides of different structures by thermal decomposition of Zn(acac)2 in the reaction solution of preformed magnetite nanoparticles (NPs) stabilized by polyphenylquinoxaline. Upon an increase of the Zn(acac)2 loading from 0.15 to 0.40 mmol (vs 1 mmol of Fe(acac)3), the Zn content increases, and the Zn-containing magnetic oxide NPs preserve a spinel structure of magnetite and an initial, predominantly multicore NP morphology. X-ray photoelectron spectroscopy (XPS) of these samples revealed that the surface of iron oxide NPs is enriched with Zn, although Zn species were also found deep under the iron oxide NP surface. For all the samples, XPS also demonstrates the atom ratio of Fe(3+)/Fe(2+) = 2:1, perfectly matching Fe3O4, but not ZnFe2O4, where Fe(2+) ions are replaced with Zn(2+). The combination of XPS with other physicochemical methods allowed us to propose that ZnO forms an ultrathin amorphous layer on the surface of iron oxide NPs and also diffuses inside the magnetite crystals. At higher Zn(acac)2 loading, cubic ZnO nanocrystals coexist with magnetite NPs, indicating a homogeneous nucleation of the former. The catalytic testing in syngas conversion to methanol demonstrated outstanding catalytic properties of Zn-containing magnetic oxides, whose activities are dependent on the Zn loading. Repeat experiments carried out with the best catalyst after magnetic separation showed remarkable catalyst stability even after five consecutive catalytic runs.
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Affiliation(s)
| | | | - Ekaterina Yu Yuzik-Klimova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , 28 Vavilov Street, Moscow 119991, Russia
| | - Nina V Kuchkina
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , 28 Vavilov Street, Moscow 119991, Russia
| | - Zinaida B Shifrina
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , 28 Vavilov Street, Moscow 119991, Russia
| | | | | | | | | | - Mikhail A Rubin
- Department of Biotechnology and Chemistry, Tver State Technical University , 22 A Nikitina Street, 170026 Tver, Russia
| | - Alexander I Sidorov
- Department of Biotechnology and Chemistry, Tver State Technical University , 22 A Nikitina Street, 170026 Tver, Russia
| | - Esther M Sulman
- Department of Biotechnology and Chemistry, Tver State Technical University , 22 A Nikitina Street, 170026 Tver, Russia
| | - Lyudmila M Bronstein
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , 28 Vavilov Street, Moscow 119991, Russia
- Faculty of Science, Department of Physics, King Abdulaziz University , Jeddah 21589, Saudi Arabia
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Nicknejad ET, Ghoreishi SM, Habibi N. Electrospinning of Cross-Linked Magnetic Chitosan Nanofibers for Protein Release. AAPS PharmSciTech 2015; 16:1480-6. [PMID: 26022546 PMCID: PMC4666244 DOI: 10.1208/s12249-015-0336-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 05/15/2015] [Indexed: 11/30/2022] Open
Abstract
A poly(vinylalcohol) (PVA) electrospun/magnetic/chitosan nanocomposite fibrous cross-linked network was fabricated using in situ cross-linking electrospinning technique and used for bovine serum albumin (BSA) loading and release applications. Sodium tripolyphosphate (TPP) and glutaraldehyde (GA) were used as cross-linkers which modified magnetic-Fe3O4 chitosan as Fe3O4/CS/TPP and Fe3O4/CS/GA, respectively. BSA was used as a model protein drugs which was encapsulated to form Fe3O4/CS/TPP/BSA and Fe3O4/CS/GA/BSA nanoparticles. The composites were electrospun with PVA to form nanofibers. Nanofibers were characterized by field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). The characterization results suggest that Fe3O4 nanoparticles with average size of 45 nm were successfully bound on the surface of chitosan. The cross-linked nanofibers were found to contain uniformly dispersed Fe3O4 nanoparticles. The size and morphology of the nanofibers network was controlled by varying the cross-linker type. FTIR data show that these two polymers have intermolecular interactions. The sample with TPP cross-linker showed an enhancement of the controlled release properties of BSA during 30-h experimental investigation. Graphical Abstract ᅟ.
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Affiliation(s)
| | | | - Neda Habibi
- Nanotechnology and Advanced Material Institute, Isfahan University of Technology, Isfahan, Iran
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Habibi MH, Parhizkar J. Cobalt ferrite nano-composite coated on glass by Doctor Blade method for photo-catalytic degradation of an azo textile dye Reactive Red 4: XRD, FESEM and DRS investigations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 150:879-885. [PMID: 26116997 DOI: 10.1016/j.saa.2015.06.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 06/05/2015] [Accepted: 06/12/2015] [Indexed: 06/04/2023]
Abstract
Cobalt ferrite nano-composite was prepared by hydrothermal route using cobalt nitrate, iron nitrate and ethylene glycol as chelating agent. The nano-composite was coated on glass by Doctor Blade method and annealed at 300 °C. The structural, optical, and photocatalytic properties have been studied by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and UV-visible spectroscopy (UV-Vis DRS). Powder XRD analysis confirmed formation of CoFe2O4 spinel phase. The estimated particle size from FESEM data was 50 nm. The calculated energy band gaps, obtained by Tauc relation from UV-Vis absorption spectra was 1.3 eV. Photocatalytic degradation of Reactive Red 4 as an azo textile was investigated in aqueous solution under irradiation showed 68.0% degradation of the dye within 100 min. The experimental enhanced activity compare to pure Fe2O3 can be ascribed to the formation of composite, which was mainly attributable to the transfer of electron and hole to the surface of composite and hinder the electron hole recombination.
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Affiliation(s)
- Mohammad Hossein Habibi
- Nanotechnology Laboratory, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran.
| | - Janan Parhizkar
- Nanotechnology Laboratory, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
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Chauhan R, Singh J, Solanki PR, Basu T, O’Kennedy R, Malhotra B. Electrochemical piezoelectric reusable immunosensor for aflatoxin B1 detection. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.07.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Chan KH, Wong ET, Idris A, Yusof NM. Modification of PES membrane by PEG-coated cobalt doped iron oxide for improved Cu(II) removal. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2015.01.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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