A simple straightforward thermal decomposition synthesis of PEG-covered Gd 2 O 3 (Gd 2 O 3 @PEG) nanoparticles
| Autor: | Freddy Haryanto, Ferry Iskandar, Atika S. Ahab, Idam Arif, Fadli Rohman |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering Thermal decomposition technology industry and agriculture Analytical chemistry Nanoparticle 02 engineering and technology Polyethylene glycol 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Mechanics of Materials Transmission electron microscopy PEG ratio Crystallite Fourier transform infrared spectroscopy 0210 nano-technology Nuclear chemistry |
| Zdroj: | Advanced Powder Technology. 27:1800-1805 |
| ISSN: | 0921-8831 |
| Popis: | Paramagnetic polyethylene glycol (PEG) functionalized gadolinium oxide (Gd 2 O 3 @PEG) nanoparticles were synthesized by a facile thermal decomposition of gadolinium acetate hydrate (Gd(CH 3 CO 2 ) 3 ·XH 2 O) precursors in PEG-1000. PEG-1000 was used as a solvent, and as a size reducing and functionalizing agent. The advantages of the present method are that it is simple and relatively fast, and it only needs a small amount of reagents. The resulting nanoparticles were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray Spectroscopy (EDX). From the XRD data, the average crystallite size, t , of the Gd 2 O 3 @PEG nanoparticles was calculated to be about 5.4, 3.8, and 3.1 nm at decomposition temperatures of 260 °C, 280 °C and 300 °C respectively. The SEM images revealed that the synthesized nanoparticles had a homogenous spherical shape while the coated nanoparticle diameters were about 178 nm at 260 °C. Synthesis at higher temperatures tended to cause agglomeration. FTIR analysis showed that the oxidation of PEG is linked to the Gd 2 O 3 surface. Magnetization was investigated using a Vibrating Sample Magnetometer (VSM). The magnetization vs. magnetic field (M–H) curve, measured at 300 K, showed that the Gd 2 O 3 @PEG nanoparticles exhibit characteristic paramagnetic behavior. We confirmed that the dispersibility and functionalization behavior of the PEG was successfully transferred to the Gd 2 O 3 nanoparticles. |
| Databáze: | OpenAIRE |
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