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Mesguich D, Moumaneix L, Henri V, Legnani M, Collière V, Esvan J, Ouali A, Fau P. Grafting Copper Atoms and Nanoparticles on Double-Walled Carbon Nanotubes: Application to Catalytic Synthesis of Propargylamine. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8545-8554. [PMID: 35793138 DOI: 10.1021/acs.langmuir.2c00771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The decoration of carbon nanotubes (CNTs) by metal nanoparticles (NPs) combines the advantages of a high specific surface material with catalytic properties of metal nanocrystals. Little work has been devoted to the decoration of CNTs with copper NPs, and no evidence of copper atomic decoration of CNTs has shown up until now. Herein, we demonstrate that the strong acidic oxidation of double-walled CNTs (dwCNTs) is very efficient for the decoration of the carbon surface by copper NPs and atoms. This treatment severely degraded the CNT walls and generated a large amount of disordered sp3 carbon. This amorphous carbon film bears many chemically active functions like carboxyl and hydroxyl ones. In such conditions, the CNT walls behave as very efficient ligands for the stabilization of copper obtained by the thermolysis of the mesityl precursor in organic solution under mild dihydrogen pressure. In addition to copper NPs, we evidenced the presence of a regular coverage with copper atoms over the dwCNTs. This nanocomposite catalyzes the quantitative synthesis of propargylamines via one A3-type coupling reaction. Five consecutive catalytic cycles with 100% yield could be performed with no loss of activity, and the combination of Cu supported on dwCNTs allows a facile recycling of the catalytic material.
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Affiliation(s)
- David Mesguich
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, Université de Toulouse 3 Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Lilian Moumaneix
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, Université de Toulouse 3 Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
- LCC-CNRS (Laboratoire de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse, France
| | - Victor Henri
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, Université de Toulouse 3 Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
- LCC-CNRS (Laboratoire de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse, France
| | - Morgan Legnani
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, Université de Toulouse 3 Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
- LCC-CNRS (Laboratoire de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse, France
| | - Vincent Collière
- LCC-CNRS (Laboratoire de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse, France
- Université de Toulouse, UT 3 Paul-Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Jérôme Esvan
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, 4 Allée Emile Monso, BP 44362, 31030 Toulouse, France
| | - Armelle Ouali
- Institut Charles Gerhardt, UMR5253 Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Pierre Fau
- LCC-CNRS (Laboratoire de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse, France
- Université de Toulouse, UT 3 Paul-Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
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Puyo M, Fau P, Kahn ML, Mesguich D, Launay J, Fajerwerg K. Removable Composite Electrode Made of Silver Nanoparticles on Pyrolyzed Photoresist Film for the Electroreduction of 4-Nitrophenol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14194-14202. [PMID: 31550887 DOI: 10.1021/acs.langmuir.9b02405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Access to removable nanocomposite electrodes for electrosensing of pollutants is of great importance. However, the preparation of reproducible and reliable carbon electrodes decorated with metallic nanoparticles, a prerequisite for trustworthy devices, remains a challenge. Here we describe an innovative and easy method to prepare such electrodes. These latter are silicon-coated with a thin carbon film on which controlled silver nanostructures are grafted. Different silver nanostructures and surface coverage of the carbon electrode (16, 36, 51, and 67%) can be obtained through a careful control of the time of the hydrogenolysis of the N-N' isopropyl butylamidinate silver organometallic precursor (t = 1, 5, 15, and 60 min, respectively). Importantly, all nanocomposite surfaces are efficient for the electrodetection of 4-nitrophenol with a remarkable decrease of the overpotential of the reduction of such molecule up to 330 mV. The surfaces are characterized by atomic force microscopy, grazing incidence X-ray diffraction, scanning electronic microscopy, and Raman spectroscopy. Furthermore, surface-enhanced Raman scattering effect is also observed. The exaltation of the Raman intensity is proportional to the surface coverage of the electrode; the number of hot spots increases with the surface coverage.
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Affiliation(s)
- Maxime Puyo
- LCC-CNRS , University of Toulouse , 205 route de Narbonne , F-31077 Toulouse , France
| | - Pierre Fau
- LCC-CNRS , University of Toulouse , 205 route de Narbonne , F-31077 Toulouse , France
| | - Myrtil L Kahn
- LCC-CNRS , University of Toulouse , 205 route de Narbonne , F-31077 Toulouse , France
| | - David Mesguich
- CIRIMAT , University of Toulouse, CNRS, Université Toulouse 3 Paul-Sabatier , 118 route de Narbonne , F-31062 Toulouse cedex 9 , France
| | - Jérôme Launay
- LAAS-CNRS , University of Toulouse , 7 avenue du colonel Roche , F-31077 Toulouse , France
| | - Katia Fajerwerg
- LCC-CNRS , University of Toulouse , 205 route de Narbonne , F-31077 Toulouse , France
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In Situ Metalorganic Deposition of Silver Nanoparticles on Gold Substrate and Square Wave Voltammetry: A Highly Efficient Combination for Nanomolar Detection of Nitrate Ions in Sea Water. CHEMOSENSORS 2018. [DOI: 10.3390/chemosensors6040050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The electro-reduction of nitrate ions in artificial sea water was investigated at a gold substrate (EAu) functionalized by silver nanoparticles (AgNPs). These AgNPs were generated in situ on the gold substrate by the direct decomposition of the metalorganic N,N′-diisopropylacetamidinate silver precursor [Ag(Amd)] in the liquid phase. Very small and well dispersed AgNPs were deposited on the gold electrode and then used as working electrode (EAu/AgNPs). Square wave voltammetry (SWV) was successfully employed to detect nitrate ions (NO3−) with a detection limit (LOD) of 0.9 nmol∙L−1 in artificial sea water (pH = 6.0) without pre-concentration or pH adjustment.
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