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Nogueira M, Matos I, Bernardo M, Tarelho LAC, Ferraria AM, Botelho do Rego AM, Fonseca I, Lapa N. Recovery of rare earth elements (Nd 3+ and Dy 3+) by using carbon-based adsorbents from spent tire rubber. Waste Manag 2024; 174:451-461. [PMID: 38113670 DOI: 10.1016/j.wasman.2023.12.025] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 11/27/2023] [Accepted: 12/11/2023] [Indexed: 12/21/2023]
Abstract
Two samples of spent tire rubber (rubber A and rubber B) were submitted to thermochemical conversion by pyrolysis process. A450, B450 and A900, B900 chars were obtained from rubber A and rubber B at 450 °C and 900 °C, respectively. The chars were then applied as recovery agents of Nd3+ and Dy3+ from aqueous solutions in mono and bicomponent solutions, and their performance was benchmarked with a commercial activated carbon. The chars obtained at 900 °C were the most efficient adsorbents for both elements with uptake capacities around 30 mg g-1. The chars obtained at 450 °C presented uptake capacities similar to the commercial carbon (≈ 11 mg g-1). A900 and B900 chars presented a higher availability of Zn ions that favored the ion exchange mechanism. It was found that Nd3+ and Dy3+ were adsorbed as oxides after Zn was released from silicate structures (Zn2SiO4). A900 char was further selected to be tested with Nd/Dy binary mixtures and it was found a trend to adsorb a slightly higher amount of Dy3+ due to its smaller ionic radius. The uptake capacity in bicomponent solutions was generally higher than for single component solutions due to the higher driving force triggered by the higher concentration gradient.
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Affiliation(s)
- M Nogueira
- LAQV/REQUIMTE, Departamento of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516, Caparica, Portugal
| | - I Matos
- LAQV/REQUIMTE, Departamento of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516, Caparica, Portugal.
| | - M Bernardo
- LAQV/REQUIMTE, Departamento of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516, Caparica, Portugal.
| | - L A C Tarelho
- Centre for Environmental and Marine Studies, Department of Environment and Planning, University of Aveiro, Aveiro 3810-193, Portugal
| | - A M Ferraria
- BSIRG, IBB - Institute for Bioengineering and Biosciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal; Associate Laboratory i4HB-Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1049-001, Lisboa, Portugal
| | - A M Botelho do Rego
- BSIRG, IBB - Institute for Bioengineering and Biosciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal; Associate Laboratory i4HB-Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1049-001, Lisboa, Portugal
| | - I Fonseca
- LAQV/REQUIMTE, Departamento of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516, Caparica, Portugal
| | - N Lapa
- LAQV/REQUIMTE, Departamento of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516, Caparica, Portugal
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Bundaleski N, Adame CF, Alves E, Barradas NP, Cerqueira MF, Deuermeier J, Delaup Y, Ferraria AM, Ferreira IMM, Neupert H, Himmerlich M, do Rego AMMB, Rimoldi M, Teodoro OMND, Vasilevskiy M, Costa Pinto P. The Role of Hydrogen Incorporation into Amorphous Carbon Films in the Change of the Secondary Electron Yield. Int J Mol Sci 2023; 24:12999. [PMID: 37629181 PMCID: PMC10456004 DOI: 10.3390/ijms241612999] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/10/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
Over the last few years, there has been increasing interest in the use of amorphous carbon thin films with low secondary electron yield (SEY) to mitigate electron multipacting in particle accelerators and RF devices. Previous works found that the SEY increases with the amount of incorporated hydrogen and correlates with the Tauc gap. In this work, we analyse films produced by magnetron sputtering with different contents of hydrogen and deuterium incorporated via the target poisoning and sputtering of CxDy molecules. XPS was implemented to estimate the phase composition of the films. The maximal SEY was found to decrease linearly with the fraction of the graphitic phase in the films. These results are supported by Raman scattering and UPS measurements. The graphitic phase decreases almost linearly for hydrogen and deuterium concentrations between 12% and 46% (at.), but abruptly decreases when the concentration reaches 53%. This vanishing of the graphitic phase is accompanied by a strong increase of SEY and the Tauc gap. These results suggest that the SEY is not dictated directly by the concentration of H/D, but by the fraction of the graphitic phase in the film. The results are supported by an original model used to calculate the SEY of films consisting of a mixture of graphitic and polymeric phases.
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Affiliation(s)
- Nenad Bundaleski
- Centro de Física e Investigação Tecnologica, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal; (C.F.A.); (O.M.N.D.T.)
| | - Carolina F. Adame
- Centro de Física e Investigação Tecnologica, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal; (C.F.A.); (O.M.N.D.T.)
| | - Eduardo Alves
- Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, University of Lisbon, 2695-066 Bobadela, Portugal; (E.A.); (N.P.B.)
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
| | - Nuno P. Barradas
- Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, University of Lisbon, 2695-066 Bobadela, Portugal; (E.A.); (N.P.B.)
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
| | - Maria F. Cerqueira
- Centre of Physics of the Universities of Minho and Porto (CF-UM-UP) and Laboratorio de Física para Materiais e Tecnologias Emergentes (LaPMET), 4710-057 Braga, Portugal; (M.F.C.); (M.V.)
- International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - Jonas Deuermeier
- Centro de Investigação de Materias (Lab. Associade I3N), Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal; (J.D.); (I.M.M.F.)
| | - Yorick Delaup
- European Organization for Nuclear Research, CERN, 1211 Geneva, Switzerland; (Y.D.); (H.N.); (M.H.); (M.R.)
| | - Ana M. Ferraria
- Associate Laboratory i4HB—Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal; (A.M.F.); (A.M.M.B.d.R.)
- iBB—Institute for Bioengineering and Biosciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Isabel M. M. Ferreira
- Centro de Investigação de Materias (Lab. Associade I3N), Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal; (J.D.); (I.M.M.F.)
| | - Holger Neupert
- European Organization for Nuclear Research, CERN, 1211 Geneva, Switzerland; (Y.D.); (H.N.); (M.H.); (M.R.)
| | - Marcel Himmerlich
- European Organization for Nuclear Research, CERN, 1211 Geneva, Switzerland; (Y.D.); (H.N.); (M.H.); (M.R.)
| | - Ana Maria M. B. do Rego
- Associate Laboratory i4HB—Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal; (A.M.F.); (A.M.M.B.d.R.)
- iBB—Institute for Bioengineering and Biosciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Martino Rimoldi
- European Organization for Nuclear Research, CERN, 1211 Geneva, Switzerland; (Y.D.); (H.N.); (M.H.); (M.R.)
| | - Orlando M. N. D. Teodoro
- Centro de Física e Investigação Tecnologica, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal; (C.F.A.); (O.M.N.D.T.)
| | - Mikhail Vasilevskiy
- Centre of Physics of the Universities of Minho and Porto (CF-UM-UP) and Laboratorio de Física para Materiais e Tecnologias Emergentes (LaPMET), 4710-057 Braga, Portugal; (M.F.C.); (M.V.)
- International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - Pedro Costa Pinto
- European Organization for Nuclear Research, CERN, 1211 Geneva, Switzerland; (Y.D.); (H.N.); (M.H.); (M.R.)
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Ferreira AC, Branco JB, Martinho JF, Ferraria AM, Botelho de Rego AM, Machado IF, Ferreira LFV. Methanation of CO2 over nanostructured Cobalt–Actinide bimetallic oxides. ChemCatChem 2023. [DOI: 10.1002/cctc.202201303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Ana C. Ferreira
- IST: Universidade de Lisboa Instituto Superior Tecnico Centro de Química Estrutural CQE, Campus Tecnológico e NuclearEstrada Nacional 10, ao km 139.7 2695-066 Portugal PORTUGAL
| | - Joaquim B. Branco
- Técnico Lisboa: Universidade de Lisboa Instituto Superior Tecnico CQE PORTUGAL
| | - J. F. Martinho
- Universidade de Lisboa Instituto Superior Tecnico CQE PORTUGAL
| | - Ana M. Ferraria
- Universidade de Lisboa Instituto Superior Tecnico iBB PORTUGAL
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Sousa DA, Ferreira LFV, Fedorov AA, do Rego AMB, Ferraria AM, Cruz AB, Berberan-Santos MN, Prata JV. Luminescent Carbon Dots from Wet Olive Pomace: Structural Insights, Photophysical Properties and Cytotoxicity. Molecules 2022; 27:molecules27196768. [PMID: 36235306 PMCID: PMC9573145 DOI: 10.3390/molecules27196768] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/02/2022] [Accepted: 10/06/2022] [Indexed: 02/05/2023] Open
Abstract
Carbon nanomaterials endowed with significant luminescence have been synthesized for the first time from an abundant, highly localized waste, the wet pomace (WP), a semi-solid by-product of industrial olive oil production. Synthetic efforts were undertaken to outshine the photoluminescence (PL) of carbon nanoparticles through a systematic search of the best reaction conditions to convert the waste biomass, mainly consisting in holocellulose, lignin and proteins, into carbon dots (CDs) by hydrothermal carbonization processes. Blue-emitting CDs with high fluorescence quantum yields were obtained. Using a comprehensive set of spectroscopic tools (FTIR, Raman, XPS, and 1H/13C NMR) in combination with steady-state and time-resolved fluorescence spectroscopy, a rational depiction of WP-CDs structures and their PL properties was reached. WP-CDs show the up-conversion of PL capabilities and negligible cytotoxicity against two mammalian cell lines (L929 and HeLa). Both properties are excellent indicators for their prospective application in biological imaging, biosensing, and dynamic therapies driven by light.
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Affiliation(s)
- Diogo A. Sousa
- Department of Chemical Engineering, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, 1959-007 Lisbon, Portugal
- CQ-VR-Centro de Química-Vila Real, Universidade de Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal
- BSIRG-iBB-Institute for Bioengineering and Biosciences, and Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Luís F. V. Ferreira
- BSIRG-iBB-Institute for Bioengineering and Biosciences, and Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Alexander A. Fedorov
- BSIRG-iBB-Institute for Bioengineering and Biosciences, and Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Ana M. B. do Rego
- BSIRG-iBB-Institute for Bioengineering and Biosciences, and Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Ana M. Ferraria
- BSIRG-iBB-Institute for Bioengineering and Biosciences, and Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Adriana B. Cruz
- BSIRG-iBB-Institute for Bioengineering and Biosciences, and Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Mário N. Berberan-Santos
- BSIRG-iBB-Institute for Bioengineering and Biosciences, and Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - José V. Prata
- Department of Chemical Engineering, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, 1959-007 Lisbon, Portugal
- CQ-VR-Centro de Química-Vila Real, Universidade de Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal
- Correspondence:
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Carvalho APG, Alegria ECBA, Fantoni A, Ferraria AM, do Rego AMB, Ribeiro APC. Effect of Graphene vs. Reduced Graphene Oxide in Gold Nanoparticles for Optical Biosensors-A Comparative Study. Biosensors (Basel) 2022; 12:bios12030163. [PMID: 35323433 PMCID: PMC8946507 DOI: 10.3390/bios12030163] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 03/01/2022] [Accepted: 03/02/2022] [Indexed: 05/14/2023]
Abstract
Aiming to develop a nanoparticle-based optical biosensor using gold nanoparticles (AuNPs) synthesized using green methods and supported by carbon-based nanomaterials, we studied the role of carbon derivatives in promoting AuNPs localized surface plasmon resonance (LSPR), as well as their morphology, dispersion, and stability. Carbon derivatives are expected to work as immobilization platforms for AuNPs, improving their analytical performance. Gold nanoparticles (AuNPs) were prepared using an eco-friendly approach in a single step by reduction of HAuCl4·3H2O using phytochemicals (from tea) which act as both reducing and capping agents. UV-Vis spectroscopy, transmission electron microscopy (TEM), zeta potential (ζ-potential), and X-ray photoelectron spectroscopy (XPS) were used to characterize the AuNPs and nanocomposites. The addition of reduced graphene oxide (rGO) resulted in greater dispersion of AuNPs on the rGO surface compared with carbon-based nanomaterials used as a support. Differences in morphology due to the nature of the carbon support were observed and are discussed here. AuNPs/rGO seem to be the most promising candidates for the development of LSPR biosensors among the three composites we studied (AuNPs/G, AuNPs/GO, and AuNPs/rGO). Simulations based on the Mie scattering theory have been used to outline the effect of the phytochemicals on LSPR, showing that when the presence of the residuals is limited to the formation of a thin capping layer, the quality of the plasmonic resonance is not affected. A further discussion of the application framework is presented.
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Affiliation(s)
- Ana P. G. Carvalho
- Departamento de Engenharia Química, ISEL, Instituto Politécnico de Lisboa, 1949-014 Lisbon, Portugal;
- Correspondence:
| | - Elisabete C. B. A. Alegria
- Departamento de Engenharia Química, ISEL, Instituto Politécnico de Lisboa, 1949-014 Lisbon, Portugal;
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal;
| | - Alessandro Fantoni
- Departamento de Engenharia Eletrónica e Telecomunicações e de Computadores, ISEL, Instituto Politécnico de Lisboa, 1949-014 Lisbon, Portugal;
- Centro de Tecnologias e Sistemas, UNINOVA, Faculdade de Ciências e Tecnologia, 2829-517 Caparica, Portugal
| | - Ana M. Ferraria
- iBB—Institute for Bioengineering and Biosciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal; (A.M.F.); (A.M.B.d.R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Ana M. Botelho do Rego
- iBB—Institute for Bioengineering and Biosciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal; (A.M.F.); (A.M.B.d.R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Ana P. C. Ribeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal;
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Gouveia AS, Oliveira V, Ferraria AM, Do Rego AM, Ferreira MJ, Tomé LC, Almeida A, Marrucho IM. Processing of poly(ionic liquid)–ionic liquid membranes using femtosecond (fs) laser radiation: Effect on CO2 separation performance. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.119903] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ferreira O, Monteiro OC, Botelho do Rego AM, Ferraria AM, Batista M, Silva ER. Dataset for the synthesis, characterisation and application of cobalt and nitrogen co-doped TiO2 anatase nanoparticles on triclosan photodegradation using visible LED light. Data Brief 2022; 40:107696. [PMID: 34977290 PMCID: PMC8688564 DOI: 10.1016/j.dib.2021.107696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/03/2021] [Accepted: 12/07/2021] [Indexed: 11/05/2022] Open
Abstract
The growing threat of emerging waterborne contaminants is a global concern, fuelled in part by the ineffectiveness of current remediation strategies. One of the most prominent remediation strategies is catalytic photodegradation, particularly with TiO2 nanoparticles (NPs), but its full utilization is hampered by using only UV radiation, which is scarce in sunlight. To fully benefit from the sunlight abundance, several efforts are focused on the tailoring of TiO2 to make it more active in visible (Vis) light. However, this target is yet to be met, sought for new developments. In a recent research paper entitled “Visible light-driven photodegradation of triclosan and antimicrobial activity against Legionella pneumophila with cobalt and nitrogen co-doped TiO2anatase nanoparticles” [1], we investigated the co-doping potential of cobalt and nitrogen in TiO2 NPs for water decontamination, focusing on its application for the degradation of triclosan (TCS) under Vis LED light irradiation. Herein, the synthesis methodology for the preparation of doped TiO2 with nitrogen is described in detail, along with complementary data on the characterisation of all previously synthesised photocatalysts in the form of specific surface area determination (B.E.T. method) based on the obtained physisorption isotherms, X-ray photoelectron spectroscopy (XPS), and the automatic determination of bandgap energy through the diffuse reflectance spectra (DRS) analysis by using the GapExtractor© software. This dataset article also includes optimised photocatalytic reaction conditions, specifically conducted under monochromatic LED light irradiation. The employed LED irradiation conditions can support photocatalytic research in the field, since LED systems are costless and have a long-life span compared to most conventional UV-Vis systems. In addition, raw UV-Vis spectra and high-performance liquid chromatography (HPLC) chromatograms for monitoring the TCS degradation reaction are also included, as are powder X-ray diffractograms (XRD) of recycled doped-TiO2 photocatalysts, confirming the renewable efficiency of the synthesised photocatalysts to pursue green chemistry principles.
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Kisała J, Ferraria AM, Mitina N, Cieniek B, Krzemiński P, Pogocki D, Nebesnyi R, Zaichenko O, Bobitski Y. Photocatalytic activity of layered MoS 2 in the reductive degradation of bromophenol blue. RSC Adv 2022; 12:22465-22475. [PMID: 36105982 PMCID: PMC9366594 DOI: 10.1039/d2ra03362c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 07/28/2022] [Indexed: 11/21/2022] Open
Abstract
Molybdenum disulphide (MoS2) is a layered material with interesting photocatalytic properties. In this study, a layered MoS2 was produced using a hydrothermal method. The obtained material was characterised by XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), SEM (scanning electron microscopy), UV-Vis spectroscopy, DLS (dynamic light scattering), and zeta potential analysis. For the evaluation of the photocatalytic properties of layered MoS2, a solution of bromophenol blue (BPB) and the catalyst was illuminated for 120 minutes. According to the experimental results, MoS2 exhibited excellent catalytic activity in BPB degradation. The MoS2 preparation method enabled improved light harvesting, avoided fast charge recombination (related to bulk MoS2), and created a large number of suitable electron transfer sites for photocatalytic reactions. Simulation of BPB decay and bromide production was carried out for a further understanding of MoS2 photocatalytic action. The simulation results proved the reduction mechanism of BPB photodegradation. Molybdenum disulphide (MoS2) is a layered material with interesting photocatalytic properties.![]()
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Affiliation(s)
- Joanna Kisała
- Department of Biology, Institute of Biology and Biotechnology, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland
| | - Ana M. Ferraria
- BSIRG-iBB-Institute for Bioengineering and Biosciences, Universidade de Lisboa, 1049-001 Lisbon, Portugal
- Associate Laboratory i4HB—Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Nataliya Mitina
- Department of Organic Chemistry, Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, 79013 Lviv, Ukraine
| | - Bogumił Cieniek
- Institute of Materials Science, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-959 Rzeszow, Poland
| | - Piotr Krzemiński
- Centre for Microelectronics and Nanotechnology, Institute of Physics, University of Rzeszow, Pigonia 1, 35-959 Rzeszow, Poland
| | - Dariusz Pogocki
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195, Warsaw, Poland
| | - Roman Nebesnyi
- Technology of Organic Products Department, Lviv Polytechnic National University, 12S. Bandera St., Lviv, 79013, Ukraine
| | - Oleksandr Zaichenko
- Department of Organic Chemistry, Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, 79013 Lviv, Ukraine
| | - Yaroslav Bobitski
- Centre for Microelectronics and Nanotechnology, Institute of Physics, University of Rzeszow, Pigonia 1, 35-959 Rzeszow, Poland
- Department of Photonics, Lviv Polytechnic National University, 1 Sviatoho Yura Sq., 79013 Lviv, Ukraine
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Matias IAS, Ribeiro APC, Ferraria AM, do Rego AMB, Martins LMDRS. Catalytic Performance of a Magnetic Core-Shell Iron(II) C-Scorpionate under Unconventional Oxidation Conditions. Nanomaterials (Basel) 2020; 10:nano10112111. [PMID: 33114194 PMCID: PMC7690781 DOI: 10.3390/nano10112111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 10/16/2020] [Accepted: 10/21/2020] [Indexed: 11/16/2022]
Abstract
For the first time, herein is reported the use of a magnetic core-shell support for a C-scorpionate metallic complex. The prepared hybrid material, that consists on the C-scorpionate iron(II) complex [FeCl2{κ3-HC(pz)3}] (pz, pyrazolyl) immobilized at magnetic core-shell particles (Fe3O4/TiO2), was tested as catalyst for the oxidation of secondary alcohols using the model substrate 1-phenylethanol. Moreover, the application of alternative energy sources (e.g., ultrasounds, microwaves, mechanical or thermal) for the peroxidative alcohol oxidation using the magnetic heterogenized iron(II) scorpionate led to different/unusual outcomes that are presented and discussed.
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Affiliation(s)
- Inês A. S. Matias
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;
| | - Ana P. C. Ribeiro
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;
- Correspondence: (A.P.C.R.); (L.M.D.R.S.M.); Tel.: +351-218419389 (L.M.D.R.S.M.)
| | - Ana M. Ferraria
- BSIRG, IBB-Institute for Bioengineering and Biosciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (A.M.F.); (A.M.B.d.R.)
| | - Ana M. Botelho do Rego
- BSIRG, IBB-Institute for Bioengineering and Biosciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (A.M.F.); (A.M.B.d.R.)
| | - Luísa M. D. R. S. Martins
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;
- Correspondence: (A.P.C.R.); (L.M.D.R.S.M.); Tel.: +351-218419389 (L.M.D.R.S.M.)
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10
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Soliman MMA, Kopylovich MN, Alegria ECBA, Ribeiro APC, M. Ferraria A, M. Botelho do Rego A, Correia LMM, Saraiva MS, Pombeiro AJL. Ultrasound and Radiation-Induced Catalytic Oxidation of 1-Phenylethanol to Acetophenone with Iron-Containing Particulate Catalysts. Molecules 2020; 25:molecules25030740. [PMID: 32046303 PMCID: PMC7038031 DOI: 10.3390/molecules25030740] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 11/26/2022] Open
Abstract
Iron-containing particulate catalysts of 0.1–1 µm size were prepared by wet and ball-milling procedures from common salts and characterized by FTIR, TGA, UV-Vis, PXRD, FEG-SEM, and XPS analyses. It was found that when the wet method was used, semi-spherical magnetic nanoparticles were formed, whereas the mechanochemical method resulted in the formation of nonmagnetic microscale needles and rectangles. Catalytic activity of the prepared materials in the oxidation of 1-phenylethanol to acetophenone was assessed under conventional heating, microwave (MW) irradiation, ultrasound (US), and oscillating magnetic field of high frequency (induction heating). In general, the catalysts obtained by wet methods exhibit lower activities, whereas the materials prepared by ball milling afford better acetophenone yields (up to 83%). A significant increase in yield (up to 4 times) was observed under the induction heating if compared to conventional heating. The study demonstrated that MW, US irradiations, and induction heating may have great potential as alternative ways to activate the catalytic system for alcohol oxidation. The possibility of the synthesized material to be magnetically recoverable has been also verified.
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Affiliation(s)
- Mohamed M. A. Soliman
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (M.M.A.S.); (A.J.L.P.)
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal;
| | - Maximilian N. Kopylovich
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (M.M.A.S.); (A.J.L.P.)
- Correspondence: (M.N.K.); (E.C.B.A.A.); (A.P.C.R.); Tel.: +351-218-317-163 (E.C.B.A.A.)
| | - Elisabete C. B. A. Alegria
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (M.M.A.S.); (A.J.L.P.)
- Área Departamental de Engenharia Química, ISEL, Instituto Politécnico de Lisboa, 1959-007 Lisboa, Portugal;
- Correspondence: (M.N.K.); (E.C.B.A.A.); (A.P.C.R.); Tel.: +351-218-317-163 (E.C.B.A.A.)
| | - Ana P. C. Ribeiro
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (M.M.A.S.); (A.J.L.P.)
- Correspondence: (M.N.K.); (E.C.B.A.A.); (A.P.C.R.); Tel.: +351-218-317-163 (E.C.B.A.A.)
| | - Ana M. Ferraria
- BSIRG, IBB-Institute for Bioengineering and Biosciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (A.M.F.); (A.M.B.d.R.)
| | - Ana M. Botelho do Rego
- BSIRG, IBB-Institute for Bioengineering and Biosciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (A.M.F.); (A.M.B.d.R.)
| | - Luís M. M. Correia
- Área Departamental de Engenharia Química, ISEL, Instituto Politécnico de Lisboa, 1959-007 Lisboa, Portugal;
| | - Marta S. Saraiva
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal;
- BioISI-Biosystems & Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1049-001 Lisboa, Portugal
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (M.M.A.S.); (A.J.L.P.)
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11
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Veloso AD, Ferraria AM, Botelho do Rego AM, Tavares PB, Valentão P, Pereira DD, Andrade PB, Fernandes AJ, Oliveira MC, Videira RA. Hydrophilic Carbon Nanomaterials: Characterisation by Physical, Chemical, and Biological Assays. ChemMedChem 2019; 14:699-711. [DOI: 10.1002/cmdc.201900003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/29/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Andreia D. Veloso
- CQ-VR and Chemistry DepartmentUniversity of Trás-os-Montes e Alto Douro 5000-801 Vila Real Portugal
| | - Ana M. Ferraria
- Centro de Química-Física Molecular and IN and IBBInstituto Superior TécnicoUniversidade de Lisboa 1049-001 Lisboa Portugal
| | - Ana M. Botelho do Rego
- Centro de Química-Física Molecular and IN and IBBInstituto Superior TécnicoUniversidade de Lisboa 1049-001 Lisboa Portugal
| | - Pedro B. Tavares
- CQ-VR and Chemistry DepartmentUniversity of Trás-os-Montes e Alto Douro 5000-801 Vila Real Portugal
| | - Patrícia Valentão
- REQUIMTE/LAQV, Laboratório de FarmacognosiaDepartamento de Química, Faculdade de FarmáciaUniversidade do Porto 4050-313 Porto Portugal
| | - David D. Pereira
- REQUIMTE/LAQV, Laboratório de FarmacognosiaDepartamento de Química, Faculdade de FarmáciaUniversidade do Porto 4050-313 Porto Portugal
| | - Paula B. Andrade
- REQUIMTE/LAQV, Laboratório de FarmacognosiaDepartamento de Química, Faculdade de FarmáciaUniversidade do Porto 4050-313 Porto Portugal
| | - António J. Fernandes
- I3N and Physics DepartmentUniversity of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - Maria C. Oliveira
- CQ-VR and Chemistry DepartmentUniversity of Trás-os-Montes e Alto Douro 5000-801 Vila Real Portugal
| | - Romeu A. Videira
- REQUIMTE/LAQV, Laboratório de FarmacognosiaDepartamento de Química, Faculdade de FarmáciaUniversidade do Porto 4050-313 Porto Portugal
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12
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Ferretti F, Ribeiro APC, Alegria ECBA, Ferraria AM, Kopylovich MN, Guedes da Silva MFC, Marchetti F, Pombeiro AJL. Synergistic catalytic action of vanadia–titania composites towards the microwave-assisted benzoin oxidation. Dalton Trans 2019; 48:3198-3203. [DOI: 10.1039/c8dt04274h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Application of synergistic effects is among the main ways to boost chemical efficiency.
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Affiliation(s)
- Francesco Ferretti
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Av. Rovisco Pais 1
- 1049-001 Lisboa
| | - Ana P. C. Ribeiro
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Av. Rovisco Pais 1
- 1049-001 Lisboa
| | | | - Ana M. Ferraria
- CQFM-Centro de Química-Física Molecular and IN and IBB-Institute for Bioengineering and Biosciences
- Instituto Superior Técnico
- Av. Rovisco Pais 1
- 1049-001 Lisboa
- Universidade de Lisboa
| | - Maximilian N. Kopylovich
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Av. Rovisco Pais 1
- 1049-001 Lisboa
| | | | - Fabio Marchetti
- School of Science and Technology
- Chemistry Section
- University of Camerino
- 62032 Camerino
- Italy
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Av. Rovisco Pais 1
- 1049-001 Lisboa
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13
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Bundaleska N, Henriques J, Abrashev M, Botelho do Rego AM, Ferraria AM, Almeida A, Dias FM, Valcheva E, Arnaudov B, Upadhyay KK, Montemor MF, Tatarova E. Large-scale synthesis of free-standing N-doped graphene using microwave plasma. Sci Rep 2018; 8:12595. [PMID: 30135558 PMCID: PMC6105711 DOI: 10.1038/s41598-018-30870-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 08/02/2018] [Indexed: 11/13/2022] Open
Abstract
Direct assembling of N-graphene, i.e. nitrogen doped graphene, in a controllable manner was achieved using microwave plasmas at atmospheric pressure conditions. The synthesis is accomplished via a single step using ethanol and ammonia as carbon and nitrogen precursors. Tailoring of the high-energy density plasma environment results in a selective synthesis of N-graphene (~0.4% doping level) in a narrow range of externally controlled operational conditions, i.e. precursor and background gas fluxes, plasma reactor design and microwave power. Applying infrared (IR) and ultraviolet (UV) irradiation to the flow of free-standing sheets in the post-plasma zone carries out changes in the percentage of sp2, the N doping type and the oxygen functionalities. X-ray photoelectron spectroscopy (XPS) revealed the relative extension of the graphene sheets π-system and the type of nitrogen chemical functions present in the lattice structure. Scanning Electron microscopy (SEM), Transmission Electron microscopy (TEM) and Raman spectroscopy were applied to determine morphological and structural characteristics of the sheets. Optical emission and FT-IR spectroscopy were applied for characterization of the high-energy density plasma environment and outlet gas stream. Electrochemical measurements were also performed to elucidate the electrochemical behavior of NG for supercapacitor applications.
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Affiliation(s)
- N Bundaleska
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - J Henriques
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - M Abrashev
- Faculty of Physics, Sofia University, 1164, Sofia, Bulgaria
| | - A M Botelho do Rego
- CQFM-Centro de Química-Física Molecular and IN and IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal
| | - A M Ferraria
- CQFM-Centro de Química-Física Molecular and IN and IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal
| | - A Almeida
- Centre of Physics and Engineering of Advanced Materiais, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal
| | - F M Dias
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - E Valcheva
- Faculty of Physics, Sofia University, 1164, Sofia, Bulgaria
| | - B Arnaudov
- Faculty of Physics, Sofia University, 1164, Sofia, Bulgaria
| | - K K Upadhyay
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - M F Montemor
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - E Tatarova
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal.
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14
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Ribeiro APC, Alegria ECBA, Kopylovich MN, Ferraria AM, Botelho do Rego AM, Pombeiro AJL. Comparison of microwave and mechanochemical energy inputs in the catalytic oxidation of cyclohexane. Dalton Trans 2018; 47:8193-8198. [PMID: 29872828 DOI: 10.1039/c8dt00866c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of microwave and mechanochemical ball milling energy inputs was studied for the peroxidative oxidation (with aqueous H2O2) of cyclohexane to cyclohexanol and cyclohexanone, over CoCl2 and/or V2O5 dispersed (μm scale) catalysts. A maximum total yield of cyclohexanol and cyclohexanone of 43% after 1 h of reaction at 30 °C, in acetonitrile and under microwave irradiation (5 W), was achieved over the CoCl2-V2O5 (3 : 1) catalyst prepared by ball milling. Cyclohexanol is the main final product with a selectivity of up to 93% over cyclohexanone. Conducting the oxidation reaction under microwave irradiation under the same conditions but without any mechanochemical treatment of the catalyst prior to use resulted in a lower total yield of 30% with a lower selectivity (69%) towards cyclohexanol over cyclohexanone. The sole application of mechanochemical treatment for the catalyst preparation and the catalytic oxidation of cyclohexane allowed to reach yields of 29% after 1 h of reaction, at room temperature, without microwave irradiation and any additive and in the absence of any organic solvent. Ball milling is shown to provide a convenient, solvent-free method to disperse these solid catalysts and to promote the above cyclohexane oxidation, although, in the latter case, not so effectively as microwave irradiation.
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Affiliation(s)
- Ana P C Ribeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
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15
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Alegria ECBA, Ribeiro APC, Mendes M, Ferraria AM, do Rego AMB, Pombeiro AJL. Effect of Phenolic Compounds on the Synthesis of Gold Nanoparticles and its Catalytic Activity in the Reduction of Nitro Compounds. Nanomaterials (Basel) 2018; 8:nano8050320. [PMID: 29748502 PMCID: PMC5977334 DOI: 10.3390/nano8050320] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/05/2018] [Accepted: 05/08/2018] [Indexed: 11/16/2022]
Abstract
Gold nanoparticles (AuNPs) were prepared using an eco-friendly approach in a single step by reduction of HAuCl4 with polyphenols from tea extracts, which act as both reducing and capping agents. The obtained AuNPs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet–visible spectroscopy (UV–vis), and X-ray photoelectron spectroscopy (XPS). They act as highly efficient catalysts in the reduction of various aromatic nitro compounds in aqueous solution. The effects of a variety of factors (e.g., reaction time, type and amount of reducing agent, shape, size, or amount of AuNPs) were studied towards the optimization of the processes. The total polyphenol content (TPC) was determined before and after the catalytic reaction and the results are discussed in terms of the tea extract percentage, the size of the AuNPs, and their catalytic activity. The reusability of the AuNP catalyst in the reduction of 4-nitrophenol was also tested. The reactions follow pseudo first-order kinetics.
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Affiliation(s)
- Elisabete C B A Alegria
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
- Chemical Engineering Departament, ISEL-Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, 1959-007 Lisboa, Portugal.
| | - Ana P C Ribeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Marta Mendes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
- Chemical Engineering Departament, ISEL-Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, 1959-007 Lisboa, Portugal.
| | - Ana M Ferraria
- CQFM-Centro de Química-Física Molecular and IN-Institute for Nanosciences and Nanotechnologies and IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - Ana M Botelho do Rego
- CQFM-Centro de Química-Física Molecular and IN-Institute for Nanosciences and Nanotechnologies and IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - Armando J L Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
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16
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Abid M, Bouattour S, Ferraria AM, Conceição DS, Carapeto AP, Vieira Ferreira LF, Botelho do Rego AM, Chehimi MM, Rei Vilar M, Boufi S. Facile functionalization of cotton with nanostructured silver/titania for visible-light plasmonic photocatalysis. J Colloid Interface Sci 2017; 507:83-94. [DOI: 10.1016/j.jcis.2017.07.109] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/21/2017] [Accepted: 07/28/2017] [Indexed: 11/15/2022]
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17
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Amorim PM, Ferraria AM, Colaço R, Branco LC, Saramago B. Imidazolium-based ionic liquids used as additives in the nanolubrication of silicon surfaces. Beilstein J Nanotechnol 2017; 8:1961-1971. [PMID: 29046844 PMCID: PMC5629412 DOI: 10.3762/bjnano.8.197] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 08/31/2017] [Indexed: 06/02/2023]
Abstract
In recent years, with the development of micro/nanoelectromechanical systems (MEMS/NEMS), the demand for efficient lubricants of silicon surfaces intensified. Although the use of ionic liquids (ILs) as additives to base oils in the lubrication of steel/steel or other types of metal/ metal tribological pairs has been investigated, the number of studies involving Si is very low. In this work, we tested imidazolium-based ILs as additives to the base oil polyethylene glycol (PEG) to lubricate Si surfaces. The friction coefficients were measured in a nanotribometer. The viscosity of the PEG + IL mixtures as well as their contact angles on the Si surface were measured. The topography and chemical composition of the substrates surfaces were determined with atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS), respectively. Due to the hygroscopic properties of PEG, the first step was to assess the effect of the presence of water. Then, a series of ILs based on the cations 1-ethyl-3-methylimidazolium [EMIM], 1-butyl-3-methylimidazolium [BMIM], 1-ethyl-3-vinylimidazolium [EVIM], 1-(2-hydroxyethyl)-3-methylimidazolium [C2OHMIM] and 1-allyl-3-methylimidazolium [AMIM] combined with the anions dicyanamide [DCA], trifluoromethanesulfonate [TfO], and ethylsulfate [EtSO4] were added to dry PEG. All additives (2 wt %) led to a decrease in friction coefficient as well as an increase in viscosity (with the exception of [AMIM][TfO]) and improved the Si wettability. The additives based on the anion [EtSO4] exhibited the most promising tribological behavior, which was attributed to the strong interaction with the Si surface ensuring the formation of a stable surface layer, which hinders the contact between the sliding surfaces.
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Affiliation(s)
- Patrícia M Amorim
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal
| | - Ana M Ferraria
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Rogério Colaço
- IDMEC-Instituto de Engenharia Mecânica, Departamento de Engenharia Mecânica, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Luís C Branco
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal
| | - Benilde Saramago
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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18
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Tatarova E, Dias A, Henriques J, Abrashev M, Bundaleska N, Kovacevic E, Bundaleski N, Cvelbar U, Valcheva E, Arnaudov B, do Rego AMB, Ferraria AM, Berndt J, Felizardo E, Teodoro OMND, Strunskus T, Alves LL, Gonçalves B. Towards large-scale in free-standing graphene and N-graphene sheets. Sci Rep 2017; 7:10175. [PMID: 28860575 PMCID: PMC5579263 DOI: 10.1038/s41598-017-10810-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 08/15/2017] [Indexed: 11/09/2022] Open
Abstract
One of the greatest challenges in the commercialization of graphene and derivatives is production of high quality material in bulk quantities at low price and in a reproducible manner. The very limited control, or even lack of, over the synthesis process is one of the main problems of conventional approaches. Herein, we present a microwave plasma-enabled scalable route for continuous, large-scale fabrication of free-standing graphene and nitrogen doped graphene sheets. The method's crucial advantage relies on harnessing unique plasma mechanisms to control the material and energy fluxes of the main building units at the atomic scale. By tailoring the high energy density plasma environment and complementarily applying in situ IR and soft UV radiation, a controllable selective synthesis of high quality graphene sheets at 2 mg/min yield with prescribed structural qualities was achieved. Raman spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and Near Edge X-ray-absorption fine-structure spectroscopy were used to probe the morphological, chemical and microstructural features of the produced material. The method described here is scalable and show a potential for controllable, large-scale fabrication of other graphene derivatives and promotes microwave plasmas as a competitive, green, and cost-effective alternative to presently used chemical methods.
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Affiliation(s)
- E Tatarova
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal.
| | - A Dias
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - J Henriques
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - M Abrashev
- Faculty of Physics, Sofia University, 1164, Sofia, Bulgaria
| | - N Bundaleska
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - E Kovacevic
- GREMI UMR 7344 CNRS and Université d'Orléans, Orleans Cedex 2, France
| | - N Bundaleski
- Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Lisboa, 2829-516, Portugal
| | - U Cvelbar
- Department for Surface Engineering and Optoelectronics F4, Jozef Stefan Institute, Ljubljana, 1000, Slovenia
| | - E Valcheva
- Faculty of Physics, Sofia University, 1164, Sofia, Bulgaria
| | - B Arnaudov
- Faculty of Physics, Sofia University, 1164, Sofia, Bulgaria
| | - A M Botelho do Rego
- Centro de Química-Física Molecular and IN, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - A M Ferraria
- Centro de Química-Física Molecular and IN, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - J Berndt
- GREMI UMR 7344 CNRS and Université d'Orléans, Orleans Cedex 2, France
| | | | - O M N D Teodoro
- Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Lisboa, 2829-516, Portugal
| | - Th Strunskus
- Institute for Materials Science, Christian Albrechts Universitaet zu Kiel, Kiel, Germany
| | - L L Alves
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
| | - B Gonçalves
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal
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19
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Dias C, Guerra LM, Bordalo BD, Lv H, Ferraria AM, Botelho do Rego AM, Cardoso S, Freitas PP, Ventura J. Voltage-polarity dependent multi-mode resistive switching on sputtered MgO nanostructures. Phys Chem Chem Phys 2017; 19:10898-10904. [PMID: 28401238 DOI: 10.1039/c7cp00062f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Resistive switching in metal-insulator-metal nanosctructures is being intensively studied for nonvolatile memory applications. Here, we report unipolar resistive switching in Pt/MgO/Ta/Ru structures, with a 30 nm oxide barrier. A forming process was needed to initiate the resistive switching, which was then observed for all Set and Reset voltage polarity combinations. We studied the influence of the voltage polarity on the variability of the Set/Reset voltages and ON/OFF resistances and revealed the importance of a thin TaOx layer working as an oxygen revervoir for resistive switching. The mechanism behind this phenomenon can be understood in terms of conductive filaments formation/rupture with a contribution from Joule heating. Resistance change is thus caused by a voltage-driven oxygen vacancy motion in the MgO layer and a filament model was proposed for each polarity mode. A OFF/ON resistance ratio of at least 2 orders of magnitude was obtained with resistive states stable up to 104 s. Our results open the prospect to improve switching performance in other resistive switching systems, by proving a better understanding of the differences between operation modes.
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Affiliation(s)
- Catarina Dias
- IFIMUP-IN and Department of Physics and Astronomy, Faculty of Sciences, Porto, Portugal.
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20
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Farinhas J, Ferraria AM, do Rego AMB, Morgado J, Charas A. Understanding the Role of Phenanthroline as Interlayer in Bulk Heterojunction Organic Photovoltaic Cells. ChemistrySelect 2016. [DOI: 10.1002/slct.201600574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Joana Farinhas
- Instituto de Telecomunicações; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais, 1 P-1049-001 Lisboa Portugal
| | - Ana M. Ferraria
- Centro de Química Física Molecular and IN; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais, 1 P-1049-001 Lisboa Portugal
| | - Ana M. B. do Rego
- Centro de Química Física Molecular and IN; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais, 1 P-1049-001 Lisboa Portugal
| | - Jorge Morgado
- Instituto de Telecomunicações; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais, 1 P-1049-001 Lisboa Portugal
- Department of Bioengineering; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais, 1 P-1049-001 Lisboa Portugal
| | - Ana Charas
- Instituto de Telecomunicações; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais, 1 P-1049-001 Lisboa Portugal
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21
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Oliveira MC, Viana AS, Botelho do Rego AM, Ferraria AM, Tavares PB, Veloso AD, Videira RA. Dual Behaviour of Amorphous Carbon Released Electrochemically from Graphite. ChemistrySelect 2016. [DOI: 10.1002/slct.201600965] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Maria C. Oliveira
- Centro de Química-Vila Real, Escola de Ciências da Vida e do Ambiente; Universidade de Trás-os-Montes e Alto Douro; 5000-801 Vila Real Portugal
| | - Ana S. Viana
- Centro de Química e Bioquímica, Faculdade de Ciências de Lisboa; Universidade de Lisboa; 1749-016 Lisboa Portugal
| | - Ana M. Botelho do Rego
- Centro de Química-Física Molecular and IN; Instituto Superior Técnico; 1049-001 Lisboa Portugal
| | - Ana M. Ferraria
- Centro de Química-Física Molecular and IN; Instituto Superior Técnico; 1049-001 Lisboa Portugal
| | - Pedro B. Tavares
- Centro de Química-Vila Real, Escola de Ciências da Vida e do Ambiente; Universidade de Trás-os-Montes e Alto Douro; 5000-801 Vila Real Portugal
| | - Andreia D. Veloso
- Centro de Química-Vila Real, Escola de Ciências da Vida e do Ambiente; Universidade de Trás-os-Montes e Alto Douro; 5000-801 Vila Real Portugal
| | - Romeu A. Videira
- Centro de Química-Vila Real, Escola de Ciências da Vida e do Ambiente; Universidade de Trás-os-Montes e Alto Douro; 5000-801 Vila Real Portugal
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22
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Errokh A, Ferraria AM, Conceição DS, Vieira Ferreira LF, Botelho do Rego AM, Rei Vilar M, Boufi S. Controlled growth of Cu2O nanoparticles bound to cotton fibres. Carbohydr Polym 2016; 141:229-37. [PMID: 26877017 DOI: 10.1016/j.carbpol.2016.01.019] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/03/2016] [Accepted: 01/09/2016] [Indexed: 11/17/2022]
Abstract
A green, safe and fast procedure is presented for in situ generation of nanoparticles (NPs) of cuprous oxide (Cu2O) onto cotton fibres at room temperature using water as a solvent. The method is based on a mild surface oxidation of cellulose fibres to generate in a controlled way carboxylic groups acting as a binding site for the adsorption of Cu(2+) via electrostatic coordination. Then, the adsorbed Cu(2+) ions were readly converted into Cu2O by dipping the treated cotton fibres into a aqueous solution of a reducing agent. Field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), as well as UV-vis absorption and emission spectroscopic methods were used to analyse the size, morphology, chemical composition and the crystalline structure of the generated nanoparticles on the fabrics. The morphology of the ensuing Cu2O nanoparticles was shown to be dependent on the reduycing agent used. Antibacterial properties of the modified fibres were also investigated.
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Affiliation(s)
- A Errokh
- University of Sfax, Faculty of Science, LMES, BP1171-3018 Sfax, Tunisia
| | - A M Ferraria
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - D S Conceição
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - L F Vieira Ferreira
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - A M Botelho do Rego
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - M Rei Vilar
- ITODYS, UMR7086 CNRS, Université Paris Diderot, Sorbonne Paris Cité, Rue Jean Antoine de Baïf, 75205 Paris Cedex 13, France
| | - S Boufi
- University of Sfax, Faculty of Science, LMES, BP1171-3018 Sfax, Tunisia.
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23
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Correia VG, Ferraria AM, Pinho MG, Aguiar-Ricardo A. Antimicrobial Contact-Active Oligo(2-oxazoline)s-Grafted Surfaces for Fast Water Disinfection at the Point-of-Use. Biomacromolecules 2015; 16:3904-15. [DOI: 10.1021/acs.biomac.5b01243] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Vanessa G. Correia
- LAQV-REQUIMTE,
Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
- Bacterial
Cell Biology Laboratory, Instituto de Tecnologia Química e Biológica António Xavier, Av. da República (EAN) 2780-157 Oeiras, Portugal
| | - Ana M. Ferraria
- Centro
de Química-Física Molecular (CQFM) and Institute of
Nanoscience and Nanotechnology (IN), Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Mariana G. Pinho
- Bacterial
Cell Biology Laboratory, Instituto de Tecnologia Química e Biológica António Xavier, Av. da República (EAN) 2780-157 Oeiras, Portugal
| | - Ana Aguiar-Ricardo
- LAQV-REQUIMTE,
Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
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24
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Affiliation(s)
- A P Carapeto
- CQFM and IN,IST,Universidade de Lisboa,Av. Rovisco Pais,1049-001 Lisboa,Portugal
| | - A M Ferraria
- CQFM and IN,IST,Universidade de Lisboa,Av. Rovisco Pais,1049-001 Lisboa,Portugal
| | - A M Botelho do Rego
- CQFM and IN,IST,Universidade de Lisboa,Av. Rovisco Pais,1049-001 Lisboa,Portugal
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25
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Fernandes TA, Ferraria AM, Galvão AM, Botelho do Rego AM, Suárez AC, Carvalho MN. Synthesis, characterization and study of the catalytic properties of Zn(II) camphor derived complexes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.10.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Branco JB, Ferreira AC, do Rego AMB, Ferraria AM, Lopes G, Gasche TA. Oxidative coupling of methane over KCl–LnCl3 eutectic molten salt catalysts. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.11.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Das SK, Mukherjee S, Lopes LMF, Ilharco LM, Ferraria AM, Botelho do Rego AM, Pombeiro AJL. Synthesis, characterization and heterogeneous catalytic application of copper integrated mesoporous matrices. Dalton Trans 2014; 43:3215-26. [DOI: 10.1039/c3dt52510d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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28
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Araújo A, Barros R, Mateus T, Gaspar D, Neves N, Vicente A, Filonovich SA, Barquinha P, Fortunato E, Ferraria AM, Botelho do Rego AM, Bicho A, Águas H, Martins R. Role of a disperse carbon interlayer on the performances of tandem a-Si solar cells. Sci Technol Adv Mater 2013; 14:045009. [PMID: 27877602 PMCID: PMC5090328 DOI: 10.1088/1468-6996/14/4/045009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 07/18/2013] [Indexed: 06/03/2023]
Abstract
We report the effect of a disperse carbon interlayer between the n-a-Si:H layer and an aluminium zinc oxide (AZO) back contact on the performance of amorphous silicon solar cells. Carbon was incorporated to the AZO film as revealed by x-ray photoelectron spectroscopy and energy-dispersive x-ray analysis. Solar cells fabricated on glass substrates using AZO in the back contact performed better when a disperse carbon interlayer was present in their structure. They exhibited an initial efficiency of 11%, open-circuit voltage Voc = 1.6 V, short-circuit current JSC = 11 mA cm-2 and a filling factor of 63%, that is, a 10% increase in the JSC and 20% increase in the efficiency compared to a standard solar cell.
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Affiliation(s)
- Andreia Araújo
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Raquel Barros
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Tiago Mateus
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Diana Gaspar
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Nuno Neves
- INNOVNANO, Materiais Avançados, SA, 3040-570 Antanhol, Portugal
| | - António Vicente
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Sergej A Filonovich
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Pedro Barquinha
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Elvira Fortunato
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Ana M Ferraria
- CQFM and IN, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal
| | - Ana M Botelho do Rego
- CQFM and IN, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal
| | - Ana Bicho
- Solar Plus, Produção de Painéis Solares SA, 3770-305 Oliveira do Bairro, Portugal
| | - Hugo Águas
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
| | - Rodrigo Martins
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
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Branco JB, Ferreira AC, Botelho do Rego AM, Ferraria AM, Almeida-Gasche T. Conversion of Methane over Bimetallic Copper and Nickel Actinide Oxides (Th, U) Using Nitrous Oxide As Oxidant. ACS Catal 2012. [DOI: 10.1021/cs300530h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joaquim B. Branco
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN−Campus Tecnológico
e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953
Sacavém, Portugal
| | - Ana C. Ferreira
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN−Campus Tecnológico
e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953
Sacavém, Portugal
| | - Ana M. Botelho do Rego
- Centro de Química-Física
Molecular and Institute of Nanoscience and Nanotechnology, IST, Technical University of Lisbon, Avenida Rovisco Pais,
1049-001 Lisboa, Portugal
| | - Ana M. Ferraria
- Centro de Química-Física
Molecular and Institute of Nanoscience and Nanotechnology, IST, Technical University of Lisbon, Avenida Rovisco Pais,
1049-001 Lisboa, Portugal
| | - Teresa Almeida-Gasche
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN−Campus Tecnológico
e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953
Sacavém, Portugal
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30
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Lavareda G, de Carvalho CN, Ferraria AM, do Rego AMB, Amaral A. P-type Cuox thin films by rf-plasma enhanced reactive thermal evaporation: influence of rf-power density. J Nanosci Nanotechnol 2012; 12:6754-6757. [PMID: 22962818 DOI: 10.1166/jnn.2012.4556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Copper oxide is a well known p-type semiconductor material, usually obtained by thermal oxidation of copper thin-films within few minutes, at atmospheric pressure. In this paper, thin films of copper oxide that were deposited by radio-frequency plasma enhanced reactive thermal evaporation of copper at room temperature, without any post-deposition annealing treatment, are studied. The deposition of good quality p-type semiconductor oxide to be used in the fabrication of p-TFTs is the purpose of this work. The thickness of the films varies from 97 up to 160 nm. The influence of rf power density on chemical, electrical and optical properties of the films was studied. Samples present conductivity within the range of 6 x 10(-5) to 4 x 10(2) omega(-1) x cm(-1) (thermal activation energy in the interval 0.46 to 0.01 eV). The p-type conductivity of the films was confirmed by Seebeck effect in the more conductive samples. Surface composition obtained by XPS analysis was correlated with optical and electrical properties, showing that rf-power plays a main role in changes of material characteristics.
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Affiliation(s)
- G Lavareda
- Centro de Tecnologias e Sistemas, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2825-114 Caparica, Portugal
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31
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Mourato A, Cabrita JF, Ferraria AM, Botelho do Rego AM, Abrantes LM. Electrocatalytic activity of polypyrrole films incorporating palladium particles. Catal Today 2010. [DOI: 10.1016/j.cattod.2010.07.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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32
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Vilar MR, Botelho do Rego AM, Ferraria AM, Jugnet Y, Noguès C, Peled D, Naaman R. Interaction of Self-Assembled Monolayers of DNA with Electrons: HREELS and XPS Studies. J Phys Chem B 2008; 112:6957-64. [DOI: 10.1021/jp8008207] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Manuel Rei Vilar
- ITODYS-CNRS, Université Paris Diderot, F-75005 Paris, France, CQFM, IST, Technical University of Lisbon, P-1049-001 Lisboa, Portugal, IRCELYON-CNRS, 2, avenue A. Einstein F-69626 Villeurbanne cedex, France, and Department of Chemical Physics, The Weizmann Institute, Rehovot 76100, Israel
| | - Ana M. Botelho do Rego
- ITODYS-CNRS, Université Paris Diderot, F-75005 Paris, France, CQFM, IST, Technical University of Lisbon, P-1049-001 Lisboa, Portugal, IRCELYON-CNRS, 2, avenue A. Einstein F-69626 Villeurbanne cedex, France, and Department of Chemical Physics, The Weizmann Institute, Rehovot 76100, Israel
| | - Ana M. Ferraria
- ITODYS-CNRS, Université Paris Diderot, F-75005 Paris, France, CQFM, IST, Technical University of Lisbon, P-1049-001 Lisboa, Portugal, IRCELYON-CNRS, 2, avenue A. Einstein F-69626 Villeurbanne cedex, France, and Department of Chemical Physics, The Weizmann Institute, Rehovot 76100, Israel
| | - Yvette Jugnet
- ITODYS-CNRS, Université Paris Diderot, F-75005 Paris, France, CQFM, IST, Technical University of Lisbon, P-1049-001 Lisboa, Portugal, IRCELYON-CNRS, 2, avenue A. Einstein F-69626 Villeurbanne cedex, France, and Department of Chemical Physics, The Weizmann Institute, Rehovot 76100, Israel
| | - Claude Noguès
- ITODYS-CNRS, Université Paris Diderot, F-75005 Paris, France, CQFM, IST, Technical University of Lisbon, P-1049-001 Lisboa, Portugal, IRCELYON-CNRS, 2, avenue A. Einstein F-69626 Villeurbanne cedex, France, and Department of Chemical Physics, The Weizmann Institute, Rehovot 76100, Israel
| | - Dana Peled
- ITODYS-CNRS, Université Paris Diderot, F-75005 Paris, France, CQFM, IST, Technical University of Lisbon, P-1049-001 Lisboa, Portugal, IRCELYON-CNRS, 2, avenue A. Einstein F-69626 Villeurbanne cedex, France, and Department of Chemical Physics, The Weizmann Institute, Rehovot 76100, Israel
| | - Ron Naaman
- ITODYS-CNRS, Université Paris Diderot, F-75005 Paris, France, CQFM, IST, Technical University of Lisbon, P-1049-001 Lisboa, Portugal, IRCELYON-CNRS, 2, avenue A. Einstein F-69626 Villeurbanne cedex, France, and Department of Chemical Physics, The Weizmann Institute, Rehovot 76100, Israel
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33
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Parra V, Vilar MR, Battaglini N, Ferraria AM, Rego AMBD, Boufi S, Rodríguez-Méndez ML, Fonavs E, Muzikante I, Bouvet M. New hybrid films based on cellulose and hydroxygallium phthalocyanine. Synergetic effects in the structure and properties. Langmuir 2007; 23:3712-22. [PMID: 17316034 DOI: 10.1021/la063114i] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Hydroxygallium phthalocyanine (HOGaPc) and cellulose (from a trimethylsilyl derivative) have been used as native elements for the preparation of a novel family of hybrid films. By spin-coating, both components allow the building of films with different configurations on various substrates in a controlled way. The particularities of these hybrid films have been characterized by a range of techniques such as Fourier transform infrared spectroscopy (FTIRS) in attenuated total reflection using multiple internal reflections (ATR/MIR), absorption ultraviolet and visible spectroscopy (UV-vis), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and surface potential measurements using the Kelvin-Zisman vibrating capacitor probe (KP). This enabled determination of the influence of cellulose on the arrangement of HOGaPc and, consequently, control of the relation between the structure and the properties of the films. Finally, gas sensor tests were performed to check the potentialities of these hybrid films. In particular, the synergetic behavior between the film-forming materials allows a fast and sensible change in surface potential after cyclic exposures to ozone (O3, 100 ppb) and nitrogen. Overall, we present the advantages of combining phthalocyanine with cellulose in enhancing the properties of the final product. Introduction of cellulose as a host material opens up a new area of hybrid films.
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Affiliation(s)
- Vicente Parra
- Laboratoire de Chimie Inorganique et Matériaux Moléculaires-CNRS, Université Pierre et Marie Curie-Paris 6, Paris, France
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34
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Botelho do Rego AM, Ferraria AM, El Beghdadi J, Debontridder F, Brogueira P, Naaman R, Rei Vilar M. Adsorption of phenylphosphonic acid on GaAs (100) surfaces. Langmuir 2005; 21:8765-73. [PMID: 16142959 DOI: 10.1021/la050682+] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The adsorption of phenylphosphonic acid (PPA) on GaAs (100) surfaces from solutions in acetonitrile/water mixtures was studied using Fourier transform infrared spectroscopy in attenuated total reflection in multiple internal reflections (ATR/MIR), X-ray photoelectron spectroscopy (XPS), high-resolution electron energy loss spectroscopy (HREELS), and atomic force microscopy (AFM). ATR/MIR in situ showed that the accumulation of PPA molecules near the GaAs surface increased with the water concentration in the solution. For water contents lower than 4%, ATR/MIR and XPS results are consistent with the formation of a low-density monolayer. A mechanism is proposed for H2O percentages lower than 4% involving the creation of interfacial bonds through a Brønsted acid-base reaction, which involves the surface hydroxyl groups most probably bound to Ga. It was found that the morphology of the final layer depended strongly on the water concentration in the adsorbing solution. For water concentrations equal to or higher than 5%, the amount of adsorbed molecules drastically increased and was accompanied by modifications in the infrared spectral region corresponding to P-O and P=O. This sudden change indicates a deprotonation of the acid. XPS studies revealed the presence of extra oxygen atoms as well as gallium species in the layer, leading to the conclusion that phosphonate and hydrogenophosphonate ions are present in the PPA layer intercalated with H3O+ and Ga3+ ions. This mechanism enables the formation of layers approximately 10 times thicker than those obtained with lower H2O percentages. HREELS indicated that the surface is composed of regions covered by PPA layers and uncovered regions, but the uncovered regions disappeared for water contents equal to or higher than 5%. XPS results are interpreted using a model consisting of a monolayer partially covering the surface and a thick layer. This model is consistent with AFM images revealing roughness on the order of 7 nm for the thick layer and 0.2-0.5 nm for the thin layer. Sonication proves to be an effective method for reducing layer thickness.
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Affiliation(s)
- A M Botelho do Rego
- Centro de Química Física Molecular and ICEMS, Departamento de Física, Instituto Superior Técnico, P-1049-001 Lisboa, Portugal.
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