The synthesis and characterization of Fe2O3@SiO2–SO3H nanofibers as a novel magnetic core-shell catalyst for formamidine and formamide synthesis
Over the past several decades, the fabrication of novel ceramic nanofibers applicable in different areas has been a frequent focus of scientists around the world. Aiming to introduce novel ceramic core-shell nanofibers as a magnetic solid acid catalyst, Fe2O3@SiO2–SO3H magnetic nanofibers were prepa...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-06-01
|
| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844021012688 |
| _version_ | 1818656324627464192 |
|---|---|
| author | Hakimeh Ziyadi Mitra Baghali Akbar Heydari |
| author_facet | Hakimeh Ziyadi Mitra Baghali Akbar Heydari |
| author_sort | Hakimeh Ziyadi |
| collection | DOAJ |
| description | Over the past several decades, the fabrication of novel ceramic nanofibers applicable in different areas has been a frequent focus of scientists around the world. Aiming to introduce novel ceramic core-shell nanofibers as a magnetic solid acid catalyst, Fe2O3@SiO2–SO3H magnetic nanofibers were prepared in this study using a modification of Fe2O3@SiO2 core-shell nanofibers with chlorosulfonic acid to increase the acidic properties of these ceramic nanofibers. The products were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive X-ray spectroscope (EDS), vibrating sample magnetometer (VSM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The prepared nanofibers were used as catalysts in formamide and formamidine synthesis. The treatment of aqueous formic acid using diverse amines with a catalytic amount of Fe2O3@SiO2–SO3H nanofibers as a reusable, magnetic and heterogeneous catalyst produced high yields of corresponding formamides at room temperature. Likewise, the reaction of diverse amines with triethyl orthoformate led to the synthesis of formamidine derivatives in excellent yields using this novel catalyst. The catalytic system was able to be recovered and reused at least five times without any catalytic activity loss. Thus, novel core-shell nanofibers can act as efficient solid acid catalysts in different organic reactions capable of being reused several times due to their easy separation by applying magnet. |
| first_indexed | 2024-12-17T03:23:47Z |
| format | Article |
| id | doaj.art-2defa99045b345abba5c923cb96c22e9 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-17T03:23:47Z |
| publishDate | 2021-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-2defa99045b345abba5c923cb96c22e92022-12-21T22:05:26ZengElsevierHeliyon2405-84402021-06-0176e07165The synthesis and characterization of Fe2O3@SiO2–SO3H nanofibers as a novel magnetic core-shell catalyst for formamidine and formamide synthesisHakimeh Ziyadi0Mitra Baghali1Akbar Heydari2Department of Organic Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Corresponding author.Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, IranChemistry Department, Tarbiat Modares University, Tehran, IranOver the past several decades, the fabrication of novel ceramic nanofibers applicable in different areas has been a frequent focus of scientists around the world. Aiming to introduce novel ceramic core-shell nanofibers as a magnetic solid acid catalyst, Fe2O3@SiO2–SO3H magnetic nanofibers were prepared in this study using a modification of Fe2O3@SiO2 core-shell nanofibers with chlorosulfonic acid to increase the acidic properties of these ceramic nanofibers. The products were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive X-ray spectroscope (EDS), vibrating sample magnetometer (VSM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The prepared nanofibers were used as catalysts in formamide and formamidine synthesis. The treatment of aqueous formic acid using diverse amines with a catalytic amount of Fe2O3@SiO2–SO3H nanofibers as a reusable, magnetic and heterogeneous catalyst produced high yields of corresponding formamides at room temperature. Likewise, the reaction of diverse amines with triethyl orthoformate led to the synthesis of formamidine derivatives in excellent yields using this novel catalyst. The catalytic system was able to be recovered and reused at least five times without any catalytic activity loss. Thus, novel core-shell nanofibers can act as efficient solid acid catalysts in different organic reactions capable of being reused several times due to their easy separation by applying magnet.http://www.sciencedirect.com/science/article/pii/S2405844021012688Core-shell nanofibersFe2O3@SiO2–SO3HElectrospinningNano catalystFormamidineFormamide |
| spellingShingle | Hakimeh Ziyadi Mitra Baghali Akbar Heydari The synthesis and characterization of Fe2O3@SiO2–SO3H nanofibers as a novel magnetic core-shell catalyst for formamidine and formamide synthesis Heliyon Core-shell nanofibers Fe2O3@SiO2–SO3H Electrospinning Nano catalyst Formamidine Formamide |
| title | The synthesis and characterization of Fe2O3@SiO2–SO3H nanofibers as a novel magnetic core-shell catalyst for formamidine and formamide synthesis |
| title_full | The synthesis and characterization of Fe2O3@SiO2–SO3H nanofibers as a novel magnetic core-shell catalyst for formamidine and formamide synthesis |
| title_fullStr | The synthesis and characterization of Fe2O3@SiO2–SO3H nanofibers as a novel magnetic core-shell catalyst for formamidine and formamide synthesis |
| title_full_unstemmed | The synthesis and characterization of Fe2O3@SiO2–SO3H nanofibers as a novel magnetic core-shell catalyst for formamidine and formamide synthesis |
| title_short | The synthesis and characterization of Fe2O3@SiO2–SO3H nanofibers as a novel magnetic core-shell catalyst for formamidine and formamide synthesis |
| title_sort | synthesis and characterization of fe2o3 sio2 so3h nanofibers as a novel magnetic core shell catalyst for formamidine and formamide synthesis |
| topic | Core-shell nanofibers Fe2O3@SiO2–SO3H Electrospinning Nano catalyst Formamidine Formamide |
| url | http://www.sciencedirect.com/science/article/pii/S2405844021012688 |
| work_keys_str_mv | AT hakimehziyadi thesynthesisandcharacterizationoffe2o3sio2so3hnanofibersasanovelmagneticcoreshellcatalystforformamidineandformamidesynthesis AT mitrabaghali thesynthesisandcharacterizationoffe2o3sio2so3hnanofibersasanovelmagneticcoreshellcatalystforformamidineandformamidesynthesis AT akbarheydari thesynthesisandcharacterizationoffe2o3sio2so3hnanofibersasanovelmagneticcoreshellcatalystforformamidineandformamidesynthesis AT hakimehziyadi synthesisandcharacterizationoffe2o3sio2so3hnanofibersasanovelmagneticcoreshellcatalystforformamidineandformamidesynthesis AT mitrabaghali synthesisandcharacterizationoffe2o3sio2so3hnanofibersasanovelmagneticcoreshellcatalystforformamidineandformamidesynthesis AT akbarheydari synthesisandcharacterizationoffe2o3sio2so3hnanofibersasanovelmagneticcoreshellcatalystforformamidineandformamidesynthesis |