Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes
Composite membranes play a very important role in the separation, concentration, and purification processes, but especially in membrane reactors and membrane bioreactors. The development of composite membranes has gained momentum especially through the involvement of various nanoparticles, polymeric...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/10/2526 |
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| author | Gheorghe Nechifor Florentina Mihaela Păncescu Alexandra Raluca Grosu Paul Constantin Albu Ovidiu Oprea Szidonia-Katalin Tanczos Constantin Bungău Vlad-Alexandru Grosu Andreia Pîrțac Aurelia Cristina Nechifor |
| author_facet | Gheorghe Nechifor Florentina Mihaela Păncescu Alexandra Raluca Grosu Paul Constantin Albu Ovidiu Oprea Szidonia-Katalin Tanczos Constantin Bungău Vlad-Alexandru Grosu Andreia Pîrțac Aurelia Cristina Nechifor |
| author_sort | Gheorghe Nechifor |
| collection | DOAJ |
| description | Composite membranes play a very important role in the separation, concentration, and purification processes, but especially in membrane reactors and membrane bioreactors. The development of composite membranes has gained momentum especially through the involvement of various nanoparticles, polymeric, oxide, or metal, that have contributed to increasing their reactivity and selectivity. This paper presents the preparation and characterization of an active metal nanoparticle-support polymer type composite membrane, based on osmium nanoparticles obtained in situ on a polypropylene hollow fiber membrane. Osmium nanoparticles are generated from a solution of osmium tetroxide in <i>tert-</i>butyl alcohol by reduction with molecular hydrogen in a contactor with a polypropylene membrane. The composite osmium-polypropylene hollow fiber obtained membranes (Os-PPM) were characterized from the morphological and structural points of view: scanning electron microscopy (SEM), high resolution SEM (HR-SEM), energy dispersive spectroscopy analysis (EDAX), X-ray diffraction analysis (XRD), Fourier transform Infrared (FTIR) spectroscopy, thermal gravimetric analysis, and differential scanning calorimetry (TGA, DSC). The process performance was tested in a redox process of <i>p-</i>nitrophenol and 10-undecylenic (10-undecenoic) acid, as a target substance of biological or biomedical interest, in solutions of lower aliphatic alcohols in a membrane contactor with a prepared composite membrane. The characteristics of osmium nanoparticles-polypropylene hollow fiber membranes open the way to biological and biotechnological applications. These membranes do not contaminate the working environment, operate at relatively low temperatures, provide a large contact area between reactants, allow successive oxidation and reduction operations in the same module, and help to recover the reaction mass by ultrafiltration. The results obtained show that the osmium-polypropylene composite membrane allows the reduction of <i>p-</i>nitrophenol or the oxidation of 10-undecylenic acid, the conversion depending on the concentration in the lower aliphatic alcohol, the nature of the lower aliphatic alcohol, and the oxidant or reducing flow through the membrane contactor. |
| first_indexed | 2024-03-10T06:20:16Z |
| format | Article |
| id | doaj.art-8dec4102a73447568ca6736b08f0dd2e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T06:20:16Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-8dec4102a73447568ca6736b08f0dd2e2023-11-22T19:22:40ZengMDPI AGNanomaterials2079-49912021-09-011110252610.3390/nano11102526Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox ProcessesGheorghe Nechifor0Florentina Mihaela Păncescu1Alexandra Raluca Grosu2Paul Constantin Albu3Ovidiu Oprea4Szidonia-Katalin Tanczos5Constantin Bungău6Vlad-Alexandru Grosu7Andreia Pîrțac8Aurelia Cristina Nechifor9Department of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 011061 Bucharest, RomaniaDepartment of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 011061 Bucharest, RomaniaDepartment of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 011061 Bucharest, RomaniaNational Institute for Research and Development in Physics and Nuclear Engineering, Radioisotopes and Radiation Metrology Department, 023465 Măgurele, RomaniaDepartment of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University Politehnica of Bucharest, 011061 Bucharest, RomaniaDepartment of Bioengineering, Sapientia Hungarian University of Transylvania, 500104 Miercurea-Ciuc, RomaniaDepartment of Engineering and Management, Faculty of Management and Technological Engineering, University of Oradea, 410087 Oradea, RomaniaDepartment of Electronic Technology and Reliability, Faculty of Electronics, Telecommunications and Information Technology, University Politehnica of Bucharest, 061071 Bucharest, RomaniaDepartment of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 011061 Bucharest, RomaniaDepartment of Analytical Chemistry and Environmental Engineering, University Politehnica of Bucharest, 011061 Bucharest, RomaniaComposite membranes play a very important role in the separation, concentration, and purification processes, but especially in membrane reactors and membrane bioreactors. The development of composite membranes has gained momentum especially through the involvement of various nanoparticles, polymeric, oxide, or metal, that have contributed to increasing their reactivity and selectivity. This paper presents the preparation and characterization of an active metal nanoparticle-support polymer type composite membrane, based on osmium nanoparticles obtained in situ on a polypropylene hollow fiber membrane. Osmium nanoparticles are generated from a solution of osmium tetroxide in <i>tert-</i>butyl alcohol by reduction with molecular hydrogen in a contactor with a polypropylene membrane. The composite osmium-polypropylene hollow fiber obtained membranes (Os-PPM) were characterized from the morphological and structural points of view: scanning electron microscopy (SEM), high resolution SEM (HR-SEM), energy dispersive spectroscopy analysis (EDAX), X-ray diffraction analysis (XRD), Fourier transform Infrared (FTIR) spectroscopy, thermal gravimetric analysis, and differential scanning calorimetry (TGA, DSC). The process performance was tested in a redox process of <i>p-</i>nitrophenol and 10-undecylenic (10-undecenoic) acid, as a target substance of biological or biomedical interest, in solutions of lower aliphatic alcohols in a membrane contactor with a prepared composite membrane. The characteristics of osmium nanoparticles-polypropylene hollow fiber membranes open the way to biological and biotechnological applications. These membranes do not contaminate the working environment, operate at relatively low temperatures, provide a large contact area between reactants, allow successive oxidation and reduction operations in the same module, and help to recover the reaction mass by ultrafiltration. The results obtained show that the osmium-polypropylene composite membrane allows the reduction of <i>p-</i>nitrophenol or the oxidation of 10-undecylenic acid, the conversion depending on the concentration in the lower aliphatic alcohol, the nature of the lower aliphatic alcohol, and the oxidant or reducing flow through the membrane contactor.https://www.mdpi.com/2079-4991/11/10/2526metal nanoparticles-polymer membranesosmium nanoparticleosmium nanoparticles-polymer membranespolypropylene hollow fiber membranesosmium nanoparticles-polypropylene hollow fiber membranesredox processes |
| spellingShingle | Gheorghe Nechifor Florentina Mihaela Păncescu Alexandra Raluca Grosu Paul Constantin Albu Ovidiu Oprea Szidonia-Katalin Tanczos Constantin Bungău Vlad-Alexandru Grosu Andreia Pîrțac Aurelia Cristina Nechifor Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes Nanomaterials metal nanoparticles-polymer membranes osmium nanoparticle osmium nanoparticles-polymer membranes polypropylene hollow fiber membranes osmium nanoparticles-polypropylene hollow fiber membranes redox processes |
| title | Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes |
| title_full | Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes |
| title_fullStr | Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes |
| title_full_unstemmed | Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes |
| title_short | Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes |
| title_sort | osmium nanoparticles polypropylene hollow fiber membranes applied in redox processes |
| topic | metal nanoparticles-polymer membranes osmium nanoparticle osmium nanoparticles-polymer membranes polypropylene hollow fiber membranes osmium nanoparticles-polypropylene hollow fiber membranes redox processes |
| url | https://www.mdpi.com/2079-4991/11/10/2526 |
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