Effects of Process Variables on Properties of CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles Prepared by Solvothermal Process
Controlling the morphology and magnetic properties of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles is crucial for the synthesis of compatible materials for different applications. CoFe<sub>2</sub>O<sub>4</sub> nanoparticles were synthesized by a solvoth...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/11/11/3056 |
| _version_ | 1797509080271552512 |
|---|---|
| author | Hong Diu Thi Duong Dung The Nguyen Kyo-Seon Kim |
| author_facet | Hong Diu Thi Duong Dung The Nguyen Kyo-Seon Kim |
| author_sort | Hong Diu Thi Duong |
| collection | DOAJ |
| description | Controlling the morphology and magnetic properties of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles is crucial for the synthesis of compatible materials for different applications. CoFe<sub>2</sub>O<sub>4</sub> nanoparticles were synthesized by a solvothermal method using cobalt nitrate, iron nitrate as precursors, and oleic acid as a surfactant. The formation of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles was systematically observed by adjusting synthesis process conditions including reaction temperature, reaction time, and oleic acid concentration. Nearly spherical, monodispersed CoFe<sub>2</sub>O<sub>4</sub> nanoparticles were formed by changing the reaction time and reaction temperature. The oleic acid-coated CoFe<sub>2</sub>O<sub>4</sub> nanoparticles inhibited the growth of particle size after 1 h and, therefore, the particle size of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles did not change significantly as the reaction time increased. Both without and with low oleic acid concentration, the large-sized cubic CoFe<sub>2</sub>O<sub>4</sub> nanoparticles showing ferromagnetic behavior were synthesized, while the small-sized CoFe<sub>2</sub>O<sub>4</sub> nanoparticles with superparamagnetic properties were obtained for the oleic acid concentration higher than 0.1 M. This study will become a basis for further research in the future to prepare the high-functional CoFe<sub>2</sub>O<sub>4</sub> magnetic nanoparticles by a solvothermal process, which can be applied to bio-separation, biosensors, drug delivery, magnetic hyperthermia, etc. |
| first_indexed | 2024-03-10T05:12:47Z |
| format | Article |
| id | doaj.art-53989f4e2c0347c2acb24c2c739d88f5 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T05:12:47Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-53989f4e2c0347c2acb24c2c739d88f52023-11-23T00:42:31ZengMDPI AGNanomaterials2079-49912021-11-011111305610.3390/nano11113056Effects of Process Variables on Properties of CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles Prepared by Solvothermal ProcessHong Diu Thi Duong0Dung The Nguyen1Kyo-Seon Kim2Department of Chemical Engineering, Kangwon National University, Chuncheon 200-701, Kangwon-do, KoreaFaculty of Chemistry, University of Sciences, Vietnam National University, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, VietnamDepartment of Chemical Engineering, Kangwon National University, Chuncheon 200-701, Kangwon-do, KoreaControlling the morphology and magnetic properties of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles is crucial for the synthesis of compatible materials for different applications. CoFe<sub>2</sub>O<sub>4</sub> nanoparticles were synthesized by a solvothermal method using cobalt nitrate, iron nitrate as precursors, and oleic acid as a surfactant. The formation of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles was systematically observed by adjusting synthesis process conditions including reaction temperature, reaction time, and oleic acid concentration. Nearly spherical, monodispersed CoFe<sub>2</sub>O<sub>4</sub> nanoparticles were formed by changing the reaction time and reaction temperature. The oleic acid-coated CoFe<sub>2</sub>O<sub>4</sub> nanoparticles inhibited the growth of particle size after 1 h and, therefore, the particle size of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles did not change significantly as the reaction time increased. Both without and with low oleic acid concentration, the large-sized cubic CoFe<sub>2</sub>O<sub>4</sub> nanoparticles showing ferromagnetic behavior were synthesized, while the small-sized CoFe<sub>2</sub>O<sub>4</sub> nanoparticles with superparamagnetic properties were obtained for the oleic acid concentration higher than 0.1 M. This study will become a basis for further research in the future to prepare the high-functional CoFe<sub>2</sub>O<sub>4</sub> magnetic nanoparticles by a solvothermal process, which can be applied to bio-separation, biosensors, drug delivery, magnetic hyperthermia, etc.https://www.mdpi.com/2079-4991/11/11/3056cobalt ferrite nanoparticlescontrolled synthesissolvothermal methodoleic acidmagnetic properties |
| spellingShingle | Hong Diu Thi Duong Dung The Nguyen Kyo-Seon Kim Effects of Process Variables on Properties of CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles Prepared by Solvothermal Process Nanomaterials cobalt ferrite nanoparticles controlled synthesis solvothermal method oleic acid magnetic properties |
| title | Effects of Process Variables on Properties of CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles Prepared by Solvothermal Process |
| title_full | Effects of Process Variables on Properties of CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles Prepared by Solvothermal Process |
| title_fullStr | Effects of Process Variables on Properties of CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles Prepared by Solvothermal Process |
| title_full_unstemmed | Effects of Process Variables on Properties of CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles Prepared by Solvothermal Process |
| title_short | Effects of Process Variables on Properties of CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles Prepared by Solvothermal Process |
| title_sort | effects of process variables on properties of cofe sub 2 sub o sub 4 sub nanoparticles prepared by solvothermal process |
| topic | cobalt ferrite nanoparticles controlled synthesis solvothermal method oleic acid magnetic properties |
| url | https://www.mdpi.com/2079-4991/11/11/3056 |
| work_keys_str_mv | AT hongdiuthiduong effectsofprocessvariablesonpropertiesofcofesub2subosub4subnanoparticlespreparedbysolvothermalprocess AT dungthenguyen effectsofprocessvariablesonpropertiesofcofesub2subosub4subnanoparticlespreparedbysolvothermalprocess AT kyoseonkim effectsofprocessvariablesonpropertiesofcofesub2subosub4subnanoparticlespreparedbysolvothermalprocess |