Obtaining and Characterizing the Osmium Nanoparticles/ n -Decanol Bulk Membrane Used for the p -Nitrophenol Reduction and Separation System.

Autor: Nechifor AC; Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 011061 Bucharest, Romania., Goran A; Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 011061 Bucharest, Romania., Tanczos SK; Department of Bioengineering, University Sapientia of Miercurea-Ciuc, 500104 Miercurea-Ciuc, Romania., Păncescu FM; Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 011061 Bucharest, Romania., Oprea OC; Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University Politehnica of Bucharest, 011061 Bucharest, Romania., Grosu AR; Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 011061 Bucharest, Romania., Matei C; Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University Politehnica of Bucharest, 011061 Bucharest, Romania., Grosu VA; Department of Electronic Technology and Reliability, Faculty of Electronics, Telecommunications and Information Technology, University Politehnica of Bucharest, 061071 Bucharest, Romania., Vasile BȘ; National Research Center for Micro and Nanomaterials, Politehnica University of Bucharest, 011061 Bucharest, Romania., Albu PC; Radioisotopes and Radiation Metrology Department (DRMR), IFIN Horia Hulubei, 023465 Măgurele, Romania.
Jazyk: angličtina
Zdroj: Membranes [Membranes (Basel)] 2022 Oct 21; Vol. 12 (10). Date of Electronic Publication: 2022 Oct 21.
DOI: 10.3390/membranes12101024
Abstrakt: Liquid membranes based on nanoparticles follow a continuous development, both from obtaining methods and characterization of techniques points of view. Lately, osmium nanoparticles have been deposited either on flat membranes, with the aim of initiating some reaction processes, or on hollow fiber membranes, with the aim of increasing the contact surface with the phases of the membrane system. This paper presents the obtainment and characterization of a liquid membrane based on osmium nanoparticles (Os-NP) dispersed in n decanol ( n Dol) for the realization of a membrane system with a large contact surface between the phases, but without using a liquid membrane support. The dispersion of osmium nanoparticles in n -decanol is carried out by the method of reducing osmium tetroxide with 1-undecenoic acid (UDA). The resulting membrane was characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive spectroscopy analysis (EDAX), thermoanalysis (TG, DSC), Fourier transform infra-red (FTIR) spectroscopy and dynamic light scattering (DLS). In order to increase the mass transfer surface, a design for the membrane system was realized with the dispersion of the membrane through the receiving phase and the dispersion of the source phase through the membrane (DBLM-dispersion bulk liquid membrane). The process performance was tested for the reduction of p -nitrophenol (pNP) from the source phase, using sodium tetra-borohydride (NaBH 4 ), to p -aminophenol (pAP), which was transported and collected in the receiving phase. The obtained results show that membranes based on the dispersion of osmium nanoparticles in n -decanol can be used with an efficiency of over 90% for the reduction of p -nitrophenol and the separation of p -aminophenol.
Competing Interests: The authors declare no conflicts of interest.
Databáze: MEDLINE
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