1
|
Ul Haq A, Fanelli F, Bekris L, Martin AM, Lee S, Khalid H, Savaniu CD, Kousi K, Metcalfe IS, Irvine JTS, Maguire P, Papaioannou EI, Mariotti D. Dielectric Barrier Plasma Discharge Exsolution of Nanoparticles at Room Temperature and Atmospheric Pressure. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402235. [PMID: 38965704 DOI: 10.1002/advs.202402235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/18/2024] [Indexed: 07/06/2024]
Abstract
Exsolution of metal nanoparticles (NPs) on perovskite oxides has been demonstrated as a reliable strategy for producing catalyst-support systems. Conventional exsolution requires high temperatures for long periods of time, limiting the selection of support materials. Plasma direct exsolution is reported at room temperature and atmospheric pressure of Ni NPs from a model A-site deficient perovskite oxide (La0.43Ca0.37Ni0.06Ti0.94O2.955). Plasma exsolution is carried out within minutes (up to 15 min) using a dielectric barrier discharge configuration both with He-only gas as well as with He/H2 gas mixtures, yielding small NPs (<30 nm diameter). To prove the practical utility of exsolved NPs, various experiments aimed at assessing their catalytic performance for methanation from synthesis gas, CO, and CH4 oxidation are carried out. Low-temperature and atmospheric pressure plasma exsolution are successfully demonstrated and suggest that this approach could contribute to the practical deployment of exsolution-based stable catalyst systems.
Collapse
Affiliation(s)
- Atta Ul Haq
- School of Engineering, Ulster University, Belfast, BT37 0QB, UK
| | - Fiorenza Fanelli
- Institute of Nanotechnology (NANOTEC), National Research Council (CNR), via Orabona 4, Bari, 70125, Italy
- Institute of Chemistry of Organometallic Compounds (ICCOM), National Research Council (CNR), via Orabona 4, Bari, 70125, Italy
| | - Leonidas Bekris
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | | | - Steve Lee
- School of Physics and Astronomy, University of St. Andrews, Scotland Fife, St. Andrews, KY16 9SS, UK
| | - Hessan Khalid
- School of Engineering, Ulster University, Belfast, BT37 0QB, UK
| | - Cristian D Savaniu
- School of Chemistry, University of St. Andrews, Scotland Fife, St. Andrews, KY16 9ST, UK
| | - Kalliopi Kousi
- School of Chemistry & Chemical Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Ian S Metcalfe
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - John T S Irvine
- School of Chemistry, University of St. Andrews, Scotland Fife, St. Andrews, KY16 9ST, UK
| | - Paul Maguire
- School of Engineering, Ulster University, Belfast, BT37 0QB, UK
| | | | - Davide Mariotti
- Department of Design, Manufacturing & Engineering Management, University of Strathclyde, Glasgow, G1 1XJ, UK
| |
Collapse
|
2
|
Dupont V, Ognier S, Morand G, Ollivier C, Fensterbank L, Tatoulian M. Direct Amination of Benzene with Ammonia by Flow Plasma Chemistry. Chemistry 2023; 29:e202301666. [PMID: 37431686 DOI: 10.1002/chem.202301666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 07/12/2023]
Abstract
Amine derivatives, including aniline and allylic amines, can be formed in a single-step process from benzene and an ammonia plasma in a microreactor. Different process parameters such as temperature, residence time, and plasma power were evaluated to improve the reaction yield and its selectivity toward aminated products and avoid hydrogenated or oligomerized products. In parallel, simulation studies of the process have been carried out to propose a global mechanism and gain a better understanding of the influence of the different process parameters. The exploration of diverse related alkenes showed that the double bonds, conjugation, and aromatization influenced the amination mechanism. Benzene was the best reactant for amination based on the lifetime of radical intermediates. Under optimized conditions, benzene was aminated in the absence of catalyst with a yield of 3.8 % and a selectivity of 49 % in various amino compounds.
Collapse
Affiliation(s)
- Victor Dupont
- Institut de Recherche de Chimie Paris, UMR 8247, 2PM group, Chimie ParisTech-PSL, PSL Université Paris, CNRS, 11 rue Pierre et Marie Curie, 75005, Paris, France
| | - Stéphanie Ognier
- Institut de Recherche de Chimie Paris, UMR 8247, 2PM group, Chimie ParisTech-PSL, PSL Université Paris, CNRS, 11 rue Pierre et Marie Curie, 75005, Paris, France
| | - Gabriel Morand
- Institut de Recherche de Chimie Paris, UMR 8247, 2PM group, Chimie ParisTech-PSL, PSL Université Paris, CNRS, 11 rue Pierre et Marie Curie, 75005, Paris, France
| | - Cyril Ollivier
- Institut Parisien de Chimie Moléculaire, UMR 8232, MACO group, Sorbonne Université, CNRS, 4 place Jussieu, 75005, Paris, France
| | - Louis Fensterbank
- Institut Parisien de Chimie Moléculaire, UMR 8232, MACO group, Sorbonne Université, CNRS, 4 place Jussieu, 75005, Paris, France
| | - Michael Tatoulian
- Institut de Recherche de Chimie Paris, UMR 8247, 2PM group, Chimie ParisTech-PSL, PSL Université Paris, CNRS, 11 rue Pierre et Marie Curie, 75005, Paris, France
| |
Collapse
|
3
|
Gallingani T, Resca E, Dominici M, Gavioli G, Laurita R, Liguori A, Mari G, Ortolani L, Pericolini E, Sala A, Laghi G, Petrachi T, Arnauld GF, Accorsi L, Rizzoli R, Colombo V, Gherardi M, Veronesi E. A new strategy to prevent biofilm and clot formation in medical devices: The use of atmospheric non-thermal plasma assisted deposition of silver-based nanostructured coatings. PLoS One 2023; 18:e0282059. [PMID: 36812218 PMCID: PMC9946233 DOI: 10.1371/journal.pone.0282059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 02/07/2023] [Indexed: 02/24/2023] Open
Abstract
In industrialized countries, health care associated infections, the fourth leading cause of disease, are a major health issue. At least half of all cases of nosocomial infections are associated with medical devices. Antibacterial coatings arise as an important approach to restrict the nosocomial infection rate without side effects and the development of antibiotic resistance. Beside nosocomial infections, clot formation affects cardiovascular medical devices and central venous catheters implants. In order to reduce and prevent such infection, we develop a plasma-assisted process for the deposition of nanostructured functional coatings on flat substrates and mini catheters. Silver nanoparticles (Ag NPs) are synthesized exploiting in-flight plasma-droplet reactions and are embedded in an organic coating deposited through hexamethyldisiloxane (HMDSO) plasma assisted polymerization. Coating stability upon liquid immersion and ethylene oxide (EtO) sterilization is assessed through chemical and morphological analysis carried out by means of Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). In the perspective of future clinical application, an in vitro analysis of anti-biofilm effect has been done. Moreover, we employed a murine model of catheter-associated infection which further highlighted the performance of Ag nanostructured films in counteract biofilm formation. The anti-clot performances coupled by haemo- and cytocompatibility assays have also been performed.
Collapse
Affiliation(s)
- Tommaso Gallingani
- Department of Industrial Engineering (DIN), Alma Mater Studiorum-Università di Bologna, Bologna, Italy
| | - Elisa Resca
- Technopole “Mario Veronesi” (TPM), Mirandola, MO, Italy
| | - Massimo Dominici
- Technopole “Mario Veronesi” (TPM), Mirandola, MO, Italy
- Department of Medical and Surgical Sciences for Children & Adults, University-Hospital of Modena and Reggio Emilia, Modena, Italy
| | | | - Romolo Laurita
- Department of Industrial Engineering (DIN), Alma Mater Studiorum-Università di Bologna, Bologna, Italy
| | - Anna Liguori
- Department of Chemistry, Alma Mater Studiorum-Università di Bologna, Bologna, Italy
| | - Giorgio Mari
- Technopole “Mario Veronesi” (TPM), Mirandola, MO, Italy
| | - Luca Ortolani
- IMM-Consiglio Nazionale delle Ricerche, Bologna, Italy
| | - Eva Pericolini
- Department of Surgical, Medical, Dental and Morphological Sciences with interest in Transplant, Oncological and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Arianna Sala
- Department of Surgical, Medical, Dental and Morphological Sciences with interest in Transplant, Oncological and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Giulia Laghi
- Department of Industrial Engineering (DIN), Alma Mater Studiorum-Università di Bologna, Bologna, Italy
- Advanced Mechanics and Materials, Interdepartmental Center for Industrial Research (AMMICIR), Alma Mater Studiorum-Università di Bologna, Bologna, Italy
| | | | | | - Luca Accorsi
- Technopole “Mario Veronesi” (TPM), Mirandola, MO, Italy
| | - Rita Rizzoli
- IMM-Consiglio Nazionale delle Ricerche, Bologna, Italy
| | - Vittorio Colombo
- Department of Industrial Engineering (DIN), Alma Mater Studiorum-Università di Bologna, Bologna, Italy
- Advanced Mechanics and Materials, Interdepartmental Center for Industrial Research (AMMICIR), Alma Mater Studiorum-Università di Bologna, Bologna, Italy
| | - Matteo Gherardi
- Department of Industrial Engineering (DIN), Alma Mater Studiorum-Università di Bologna, Bologna, Italy
- Advanced Mechanics and Materials, Interdepartmental Center for Industrial Research (AMMICIR), Alma Mater Studiorum-Università di Bologna, Bologna, Italy
| | - Elena Veronesi
- Technopole “Mario Veronesi” (TPM), Mirandola, MO, Italy
- * E-mail:
| |
Collapse
|
4
|
Spectroscopic Characterization of an Atmospheric Pressure Plasma Jet Used for Cold Plasma Spraying. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12136814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Cold plasma spray, a powder deposition method by means of an atmospheric pressure plasma jet is a promising coating technology for use on temperature sensitive surfaces. For further improvement of this coating process, a deeper understanding of its thermokinetic properties is required. By means of optical emission spectroscopy, the plasma effluent of an atmospheric pressure nitrogen arc jet is characterized by different distances from the nozzle and different gas flow rates of 35 Lmin−1 and 45 Lmin−1. A Boltzmann plot of N2+(B-X) was used to determine rotational temperatures, which were found to be around 4000 K at the nozzle exit. Excitation temperatures, analyzed using atomic nitrogen lines, were around 6000 K for all distances. Stark broadening of the Hα-line was too weak for determination of electron density for both gas flow rates. Overall no influence on gas flow rate was found.
Collapse
|
5
|
Special Issue “Micro and Nanotechnology: Application in Surface Modification”. Processes (Basel) 2022. [DOI: 10.3390/pr10061121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
Surface modification is crucial to the fabrication of (multi)functional materials and interfaces for a range of applications, such as superhydrophobic and self-cleaning surfaces, anti-biofouling and antibacterial coatings, dropwise condensation, packaging materials, sensors, catalysis, and photonics [...]
Collapse
|