Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation
As organic dyes are a major source of pollution, it is important to develop novel and efficient heterogeneous catalysts with high activity for their degradation. In this work, two innovative techniques, atomic layer deposition and electrospinning, were used to prepare palladium nanoparticles (Pd NPs...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-04-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/13/8/1947 |
| _version_ | 1797570126105542656 |
|---|---|
| author | Melissa Najem Amr A. Nada Matthieu Weber Syreina Sayegh Antonio Razzouk Chrystelle Salameh Cynthia Eid Mikhael Bechelany |
| author_facet | Melissa Najem Amr A. Nada Matthieu Weber Syreina Sayegh Antonio Razzouk Chrystelle Salameh Cynthia Eid Mikhael Bechelany |
| author_sort | Melissa Najem |
| collection | DOAJ |
| description | As organic dyes are a major source of pollution, it is important to develop novel and efficient heterogeneous catalysts with high activity for their degradation. In this work, two innovative techniques, atomic layer deposition and electrospinning, were used to prepare palladium nanoparticles (Pd NPs) supported on carbon nanofibers (CNFs). The sample morphology was investigated using scanning and transmission electron microscopy. This showed the presence of nanofibers of several micrometers in length and with a mean diameter of 200 nm. Moreover, the size of the highly dispersed Pd NPs was about 7 nm. X-ray photoelectron spectroscopy visually validated the inclusion of metallic Pd. The prepared nano-catalysts were then used to reduce methyl orange (MO) in the presence of sodium borohydride (NaBH<sub>4</sub>). The Freundlich isotherm model was the most suitable model to explain the adsorption equilibrium for MO onto the Pd/CNF catalysts. Using 5 mL MO dye-solution (0.0305 mM) and 1 mL NaBH<sub>4</sub> (0.026 mM), a 98.9% of catalytic activity was achieved in 240 min by 0.01 g of the prepared nano-catalysts Pd/C (0.016 M). Finally, no loss of catalytic activity was observed when such catalysts were used again. These results represent a promising avenue for the degradation of organic pollutants and for heterogeneous catalysis. |
| first_indexed | 2024-03-10T20:20:29Z |
| format | Article |
| id | doaj.art-9c5fc966ceef490ca1a283746ff968ca |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T20:20:29Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9c5fc966ceef490ca1a283746ff968ca2023-11-19T22:14:38ZengMDPI AGMaterials1996-19442020-04-01138194710.3390/ma13081947Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant DegradationMelissa Najem0Amr A. Nada1Matthieu Weber2Syreina Sayegh3Antonio Razzouk4Chrystelle Salameh5Cynthia Eid6Mikhael Bechelany7Institut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, FranceInstitut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, FranceInstitut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, FranceInstitut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, FranceLaboratory of Chemical Analyses, Faculty of Sciences 2, Lebanese University, Fanar B.P. 90656, LebanonInstitut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, FranceEC2M, Faculty of Science 2, Fanar Campus, Lebanese University, Fanar B.P. 90656, LebanonInstitut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, FranceAs organic dyes are a major source of pollution, it is important to develop novel and efficient heterogeneous catalysts with high activity for their degradation. In this work, two innovative techniques, atomic layer deposition and electrospinning, were used to prepare palladium nanoparticles (Pd NPs) supported on carbon nanofibers (CNFs). The sample morphology was investigated using scanning and transmission electron microscopy. This showed the presence of nanofibers of several micrometers in length and with a mean diameter of 200 nm. Moreover, the size of the highly dispersed Pd NPs was about 7 nm. X-ray photoelectron spectroscopy visually validated the inclusion of metallic Pd. The prepared nano-catalysts were then used to reduce methyl orange (MO) in the presence of sodium borohydride (NaBH<sub>4</sub>). The Freundlich isotherm model was the most suitable model to explain the adsorption equilibrium for MO onto the Pd/CNF catalysts. Using 5 mL MO dye-solution (0.0305 mM) and 1 mL NaBH<sub>4</sub> (0.026 mM), a 98.9% of catalytic activity was achieved in 240 min by 0.01 g of the prepared nano-catalysts Pd/C (0.016 M). Finally, no loss of catalytic activity was observed when such catalysts were used again. These results represent a promising avenue for the degradation of organic pollutants and for heterogeneous catalysis.https://www.mdpi.com/1996-1944/13/8/1947palladium nanoparticlescarbon nanofibersnanocatalystselectrospinningatomic layer depositionheterogeneous catalysis |
| spellingShingle | Melissa Najem Amr A. Nada Matthieu Weber Syreina Sayegh Antonio Razzouk Chrystelle Salameh Cynthia Eid Mikhael Bechelany Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation Materials palladium nanoparticles carbon nanofibers nanocatalysts electrospinning atomic layer deposition heterogeneous catalysis |
| title | Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation |
| title_full | Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation |
| title_fullStr | Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation |
| title_full_unstemmed | Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation |
| title_short | Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation |
| title_sort | palladium carbon nanofibers by combining atomic layer deposition and electrospinning for organic pollutant degradation |
| topic | palladium nanoparticles carbon nanofibers nanocatalysts electrospinning atomic layer deposition heterogeneous catalysis |
| url | https://www.mdpi.com/1996-1944/13/8/1947 |
| work_keys_str_mv | AT melissanajem palladiumcarbonnanofibersbycombiningatomiclayerdepositionandelectrospinningfororganicpollutantdegradation AT amranada palladiumcarbonnanofibersbycombiningatomiclayerdepositionandelectrospinningfororganicpollutantdegradation AT matthieuweber palladiumcarbonnanofibersbycombiningatomiclayerdepositionandelectrospinningfororganicpollutantdegradation AT syreinasayegh palladiumcarbonnanofibersbycombiningatomiclayerdepositionandelectrospinningfororganicpollutantdegradation AT antoniorazzouk palladiumcarbonnanofibersbycombiningatomiclayerdepositionandelectrospinningfororganicpollutantdegradation AT chrystellesalameh palladiumcarbonnanofibersbycombiningatomiclayerdepositionandelectrospinningfororganicpollutantdegradation AT cynthiaeid palladiumcarbonnanofibersbycombiningatomiclayerdepositionandelectrospinningfororganicpollutantdegradation AT mikhaelbechelany palladiumcarbonnanofibersbycombiningatomiclayerdepositionandelectrospinningfororganicpollutantdegradation |