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Bușilă M, Mușat V, Dinică R, Tutunaru D, Pantazi A, Dorobantu D, Culiță DC, Enăchescu M. Antibacterial and Photocatalytic Coatings Based on Cu-Doped ZnO Nanoparticles into Microcellulose Matrix. Materials (Basel) 2022; 15:7656. [PMID: 36363250 PMCID: PMC9655606 DOI: 10.3390/ma15217656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/14/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
The paper presents a successful, simple method for the preparation and deposition of new hybrid Cu-doped ZnO/microcellulose coatings on textile fibers, directly from cellulose aqueous solution. The morphological, compositional, and structural properties of the obtained materials were investigated using different characterization methods, such as SEM-EDX, XRD, Raman and FTIR, as well as BET surface area measurements. The successful doping of ZnO NPs with Cu was confirmed by the EDX and Raman analysis. As a result of Cu doping, the hybrid NPs experienced a phase change from ZnO to (Zn0.9Cu0.1)O, as shown by the XRD results. All the hybrid NPs exhibited a high degree of crystallinity, as revealed by the very sharp reflections in XRD patterns and suggested also by the Raman results. The evaluation of the very low copper-doping (0.1-1 at.%) effect has shown different behavior trends of the hybrid coatings compared with the starting oxide NPs, for MB and MO photodegradation. Continuous increases up to 92% and 60% for MB and MO degradation, respectively, were obtained at maximum 1 at.%-Cu doping coatings. Strong antibacterial activity against S. aureus and E. coli were observed.
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Affiliation(s)
- Mariana Bușilă
- LNC-CNMF—Center of Nanostructures and Functional Materials, Faculty of Engineering, “Dunărea de Jos” University of Galati, 111 Domneasca Street, 800201 Galați, Romania
| | - Viorica Mușat
- LNC-CNMF—Center of Nanostructures and Functional Materials, Faculty of Engineering, “Dunărea de Jos” University of Galati, 111 Domneasca Street, 800201 Galați, Romania
| | - Rodica Dinică
- Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, “Dunărea de Jos” University of Galati, 800201 Galați, Romania
| | - Dana Tutunaru
- Faculty of Medicine and Pharmacy, “Dunărea de Jos” University of Galati, Street, 800, 800201 Galați, Romania
| | - Aida Pantazi
- CSSNT—Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Dorel Dorobantu
- CSSNT—Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
- S.C. NanoPRO START MC S.R.L., Mitropolit Antim Ivireanu Street 40, 110310 Pitesti, Romania
| | - Daniela C. Culiță
- Institute of Physical Chemistry “Ilie Murgulescu” of Romanian Academy, 060021 Bucharest, Romania
| | - Marius Enăchescu
- CSSNT—Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
- Academy of Romanian Scientists, Splaiul Independentei 54, 050094 Bucharest, Romania
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Moise CC, Mihai GV, Anicăi L, Monaico EV, Ursaki VV, Enăchescu M, Tiginyanu IM. Electrochemical Deposition of Ferromagnetic Ni Nanoparticles in InP Nanotemplates Fabricated by Anodic Etching Using Environmentally Friendly Electrolyte. Nanomaterials (Basel) 2022; 12:3787. [PMID: 36364561 PMCID: PMC9656686 DOI: 10.3390/nano12213787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Porous InP templates possessing a thickness of up to 100 µm and uniformly distributed porosity were prepared by anodic etching of InP substrates exhibiting different electrical conductivities, involving an environmentally friendly electrolyte. Ni nanoparticles were successfully directly deposited by pulsed electroplating into prefabricated InP templates without any additional deposition of intermediary layers. The parameters of electrodeposition, including the pulse amplitude, pulse width and interval between pulses, were optimized to reach a uniform metal deposition covering the inner surface of the nanopores. The electrochemical dissolution of n-InP single crystals was investigated by measuring the current-voltage dependences, while the Ni-decorated n-InP templates have been characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The proposed technology is expected to be of interest for sensing and photocatalytic applications, as well as for the exploration of their plasmonic and magnetic properties.
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Affiliation(s)
- Călin Constantin Moise
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
- S.C. NanoPRO START MC S.R.L., Mitropolit Antim Ivireanu Street 40, 110310 Pitesti, Romania
| | - Geanina Valentina Mihai
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Liana Anicăi
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Eduard V. Monaico
- National Center for Materials Study and Testing, Technical University of Moldova, Bd. Stefan cel Mare 168, 2004 Chisinau, Moldova
| | - Veaceslav V. Ursaki
- National Center for Materials Study and Testing, Technical University of Moldova, Bd. Stefan cel Mare 168, 2004 Chisinau, Moldova
- Academy of Sciences of Moldova, 2001 Chisinau, Moldova
| | - Marius Enăchescu
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
- Academy of Romanian Scientists, 54 Splaiul Independentei, 050094 Bucharest, Romania
| | - Ion M. Tiginyanu
- National Center for Materials Study and Testing, Technical University of Moldova, Bd. Stefan cel Mare 168, 2004 Chisinau, Moldova
- Academy of Sciences of Moldova, 2001 Chisinau, Moldova
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Barra A, Lazăr O, Pantazi A, Hortigüela MJ, Otero-Irurueta G, Enăchescu M, Ruiz-Hitzky E, Nunes C, Ferreira P. Joining Caffeic Acid and Hydrothermal Treatment to Produce Environmentally Benign Highly Reduced Graphene Oxide. Nanomaterials (Basel) 2021; 11:nano11030732. [PMID: 33803933 PMCID: PMC8001889 DOI: 10.3390/nano11030732] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/01/2021] [Accepted: 03/08/2021] [Indexed: 11/21/2022]
Abstract
Reduced graphene oxide (rGO) is a promising graphene-based material, with transversal applicability to a wide range of technological fields. Nevertheless, the common use of efficient—but hazardous to environment and toxic—reducing agents prevents its application in biological and other fields. Consequently, the development of green reducing strategies is a requirement to overcome this issue. Herein, a green, simple, and cost-effective one-step reduction methodology is presented. Graphene oxide (GO) was hydrothermally reduced in the presence of caffeic acid (CA), a natural occurring phenolic compound. The improvement of the hydrothermal reduction through the presence of CA is confirmed by XRD, Raman, XPS and TGA analysis. Moreover, CA polymerizes under hydrothermal conditions with the formation of spherical and non-spherical carbon particles, which can be useful for further rGO functionalization. FTIR and XPS confirm the oxygen removal in the reduced samples. The high-resolution scanning transmission electron microscopy (HRSTEM) images also support the reduction, showing rGO samples with an ordered graphitic layered structure. The promising rGO synthesized by this eco-friendly methodology can be explored for many applications.
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Affiliation(s)
- Ana Barra
- Department of Materials and Ceramic Engineering, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal;
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
- Materials Science Institute of Madrid, CSIC, c/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain;
| | - Oana Lazăr
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 060042 Bucharest, Romania; (O.L.); (A.P.); (M.E.)
| | - Aida Pantazi
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 060042 Bucharest, Romania; (O.L.); (A.P.); (M.E.)
- S.C. NANOPRO START M.C. S.R.L., 110310 Pitești, Romania
| | - María J. Hortigüela
- Centre for Mechanical Technology & Automation, University of Aveiro, 3810-193 Aveiro, Portugal; (M.J.H.); (G.O.-I.)
| | - Gonzalo Otero-Irurueta
- Centre for Mechanical Technology & Automation, University of Aveiro, 3810-193 Aveiro, Portugal; (M.J.H.); (G.O.-I.)
| | - Marius Enăchescu
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 060042 Bucharest, Romania; (O.L.); (A.P.); (M.E.)
- Academy of Romanian Scientists, 50085 Bucharest, Romania
| | - Eduardo Ruiz-Hitzky
- Materials Science Institute of Madrid, CSIC, c/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain;
| | - Cláudia Nunes
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
- Correspondence: (C.N.); (P.F.); Tel.: +351-234-370-200 (C.N.); +351-234-370-200 (P.F.)
| | - Paula Ferreira
- Department of Materials and Ceramic Engineering, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal;
- Correspondence: (C.N.); (P.F.); Tel.: +351-234-370-200 (C.N.); +351-234-370-200 (P.F.)
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Marinescu G, Enăchescu M. [The care and follow up of eclamptic patients up to complete recovery of vital functions]. Viata Med Rev Inf Prof Stiint Cadrelor Medii Sanit 1979; 27:223-4. [PMID: 120052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Lungu I, Stan M, Enăchescu M, Untu A, Leibovici M. [Primary cancer of the liver. Comments on etiology and diagnosis with reference to 56 cases]. Rev Med Chir Soc Med Nat Iasi 1978; 82:379-84. [PMID: 16296491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
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Enăchescu M. [Assistant obstetrician-gynecologist in cooperation with the assistant in resuscitation anesthesia in uterine rupture]. Munca Sanit 1971; 19:391-4. [PMID: 5210295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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