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工艺变量对溶剂热法制备的CoFeO纳米颗粒性能的影响

Effects of Process Variables on Properties of CoFeO Nanoparticles Prepared by Solvothermal Process.

作者信息

Duong Hong Diu Thi, Nguyen Dung The, Kim Kyo-Seon

机构信息

Department of Chemical Engineering, Kangwon National University, Chuncheon 200-701, Kangwon-do, Korea.

Faculty of Chemistry, University of Sciences, Vietnam National University, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam.

出版信息

Nanomaterials (Basel). 2021 Nov 13;11(11):3056. doi: 10.3390/nano11113056.

DOI:10.3390/nano11113056
PMID:34835820
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8624225/
Abstract

Controlling the morphology and magnetic properties of CoFeO nanoparticles is crucial for the synthesis of compatible materials for different applications. CoFeO nanoparticles were synthesized by a solvothermal method using cobalt nitrate, iron nitrate as precursors, and oleic acid as a surfactant. The formation of CoFeO nanoparticles was systematically observed by adjusting synthesis process conditions including reaction temperature, reaction time, and oleic acid concentration. Nearly spherical, monodispersed CoFeO nanoparticles were formed by changing the reaction time and reaction temperature. The oleic acid-coated CoFeO nanoparticles inhibited the growth of particle size after 1 h and, therefore, the particle size of CoFeO nanoparticles did not change significantly as the reaction time increased. Both without and with low oleic acid concentration, the large-sized cubic CoFeO nanoparticles showing ferromagnetic behavior were synthesized, while the small-sized CoFeO 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 CoFeO magnetic nanoparticles by a solvothermal process, which can be applied to bio-separation, biosensors, drug delivery, magnetic hyperthermia, etc.

摘要

控制CoFeO纳米颗粒的形态和磁性对于合成适用于不同应用的材料至关重要。采用硝酸钴、硝酸铁作为前驱体,油酸作为表面活性剂,通过溶剂热法合成了CoFeO纳米颗粒。通过调节反应温度、反应时间和油酸浓度等合成工艺条件,系统地观察了CoFeO纳米颗粒的形成过程。通过改变反应时间和反应温度,形成了近球形、单分散的CoFeO纳米颗粒。油酸包覆的CoFeO纳米颗粒在1小时后抑制了粒径的增长,因此,随着反应时间的增加,CoFeO纳米颗粒的粒径没有显著变化。在油酸浓度较低和无油酸的情况下,均合成了表现出铁磁行为的大尺寸立方CoFeO纳米颗粒,而当油酸浓度高于0.1 M时,获得了具有超顺磁特性的小尺寸CoFeO纳米颗粒。本研究将为未来进一步研究通过溶剂热法制备高功能CoFeO磁性纳米颗粒奠定基础,该纳米颗粒可应用于生物分离、生物传感器、药物递送、磁热疗等领域。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/7476c2333465/nanomaterials-11-03056-g013a.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/6aeaba5b70df/nanomaterials-11-03056-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/2cd3ca8f151e/nanomaterials-11-03056-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/cf02ef0a3cc4/nanomaterials-11-03056-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/70923fca1df0/nanomaterials-11-03056-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/7476c2333465/nanomaterials-11-03056-g013a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/b65612a605d7/nanomaterials-11-03056-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/6aeaba5b70df/nanomaterials-11-03056-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/2cd3ca8f151e/nanomaterials-11-03056-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/cf02ef0a3cc4/nanomaterials-11-03056-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f082/8624225/7476c2333465/nanomaterials-11-03056-g013a.jpg

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