Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension
Maghemite (γ-Fe2O3) nanoparticles have been synthesized using a chemical coprecipitation method at different nitric acid concentrations as an oxidizing agent. Characterization of all samples performed by several techniques including X-ray diffraction (XRD), transmission electron microscopy (TEM), al...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/589479 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832556725955198976 |
|---|---|
| author | Irwan Nurdin Mohd Rafie Johan Iskandar Idris Yaacob Bee Chin Ang |
| author_facet | Irwan Nurdin Mohd Rafie Johan Iskandar Idris Yaacob Bee Chin Ang |
| author_sort | Irwan Nurdin |
| collection | DOAJ |
| description | Maghemite (γ-Fe2O3) nanoparticles have been synthesized using a chemical coprecipitation method at different nitric acid concentrations as an oxidizing agent. Characterization of all samples performed by several techniques including X-ray diffraction (XRD), transmission electron microscopy (TEM), alternating gradient magnetometry (AGM), thermogravimetric analysis (TGA), dynamic light scattering (DLS), and zeta potential. The XRD patterns confirmed that the particles were maghemite. The crystallite size of all samples decreases with the increasing concentration of nitric acid. TEM observation showed that the particles have spherical morphology with narrow particle size distribution. The particles showed superparamagnetic behavior with decreased magnetization values at the increasing concentration of nitric acid. TGA measurement showed that the stability temperature decreases with the increasing concentration of nitric acid. DLS measurement showed that the hydrodynamic particle sizes decrease with the increasing concentration of nitric acid. Zeta potential values show a decrease with the increasing concentration of nitric acid. The increasing concentration of nitric acid in synthesis of maghemite nanoparticles produced smaller size particles, lower magnetization, better thermal stability, and more stable maghemite nanoparticles suspension. |
| format | Article |
| id | doaj-art-13bf81a26a2f4e7fb5bade2989a7bdc0 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-13bf81a26a2f4e7fb5bade2989a7bdc02025-02-03T05:44:26ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/589479589479Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles SuspensionIrwan Nurdin0Mohd Rafie Johan1Iskandar Idris Yaacob2Bee Chin Ang3Nanomaterials Engineering Research Group, Advanced Materials Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, MalaysiaNanomaterials Engineering Research Group, Advanced Materials Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Manufacturing and Materials Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, 50728 Kuala Lumpur, MalaysiaNanomaterials Engineering Research Group, Advanced Materials Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, MalaysiaMaghemite (γ-Fe2O3) nanoparticles have been synthesized using a chemical coprecipitation method at different nitric acid concentrations as an oxidizing agent. Characterization of all samples performed by several techniques including X-ray diffraction (XRD), transmission electron microscopy (TEM), alternating gradient magnetometry (AGM), thermogravimetric analysis (TGA), dynamic light scattering (DLS), and zeta potential. The XRD patterns confirmed that the particles were maghemite. The crystallite size of all samples decreases with the increasing concentration of nitric acid. TEM observation showed that the particles have spherical morphology with narrow particle size distribution. The particles showed superparamagnetic behavior with decreased magnetization values at the increasing concentration of nitric acid. TGA measurement showed that the stability temperature decreases with the increasing concentration of nitric acid. DLS measurement showed that the hydrodynamic particle sizes decrease with the increasing concentration of nitric acid. Zeta potential values show a decrease with the increasing concentration of nitric acid. The increasing concentration of nitric acid in synthesis of maghemite nanoparticles produced smaller size particles, lower magnetization, better thermal stability, and more stable maghemite nanoparticles suspension.http://dx.doi.org/10.1155/2014/589479 |
| spellingShingle | Irwan Nurdin Mohd Rafie Johan Iskandar Idris Yaacob Bee Chin Ang Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension The Scientific World Journal |
| title | Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension |
| title_full | Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension |
| title_fullStr | Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension |
| title_full_unstemmed | Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension |
| title_short | Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension |
| title_sort | effect of nitric acid concentrations on synthesis and stability of maghemite nanoparticles suspension |
| url | http://dx.doi.org/10.1155/2014/589479 |
| work_keys_str_mv | AT irwannurdin effectofnitricacidconcentrationsonsynthesisandstabilityofmaghemitenanoparticlessuspension AT mohdrafiejohan effectofnitricacidconcentrationsonsynthesisandstabilityofmaghemitenanoparticlessuspension AT iskandaridrisyaacob effectofnitricacidconcentrationsonsynthesisandstabilityofmaghemitenanoparticlessuspension AT beechinang effectofnitricacidconcentrationsonsynthesisandstabilityofmaghemitenanoparticlessuspension |