Comparative Study of Stearic Acid/Iron-Oxide Binary and Stearic Acid/Iron-Oxide/Titanium-Oxide Ternary for Use as Energy Storage Material

4th International Conference on Science & Engineering in Mathematics, Chemistry and Physics 2016

数学;化学;物理学

Andiarto, Rizky^1 ; Nuryadin, Muhammad Khalish^1 ; Saleh, Rosari^2

Departemen Fisika, Fakultas MIPA, Universitas Indonesia, Depok

16424, Indonesia^1

Integrated Laboratory of Energy and Environment, Fakultas MIPA, Universitas Indonesia, Depok

1624, Indonesia^2

关键词: Characteristic peaks;    Comparative studies;    Degradation temperatures;    Dispersion technique;    Energy dispersive X ray spectroscopy;    Fe3O4 nanoparticles;    Field emission scanning electron microscopes;    X ray diffractometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/710/1/012020/pdf
DOI  :  10.1088/1742-6596/710/1/012020

来源: IOP

【 摘 要 】

In this work, a series of stearic acid/Fe3O4, and stearic acid/Fe3O4/TiO2nanocomposites for thermal energy storage (TES) system were synthesized through a two-step process. Fe3O4nanoparticles and Fe3O4/TiO2nanocomposites were first prepared using sol-gel methods and then both samples were mixed into stearic acid by dispersion technique at three different weight % ratio to stearic acid: 5%, 10% and 15% to obtain stearic acid/Fe3O4, and stearic acid/Fe3O4/TiO2nanocomposites. Morphologies and structural properties of the samples were characterized by X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM) and energy dispersive X-ray spectroscopy (EDX), while thermal properties of the sample were determined by differential scanning calorimetry (DSC) and fhermogravimetric analysis (TGA). The XRD patterns demonstrate, that stearic acid/Fe3O4contained characteristic peaks of Fe3O4and stearic acid structures, while peaks corresponded to anatase TiO2structures appear in stearic acid/ Fe3O4/TiO2nanocomposites. From the DSC measurements, it is found that the maximum latent heat was found at samples with weight ratio of 5%. Moreover, the enhancement up to 20% of latent heat in solidifying as well as melting processes was observed. TGA measurements show high degradation temperature in the range of 246 - 251°C. The TGA results also shows that the residual mass of the sample matches the composition of Fe3O4and Fe3O4/TiO2which is added to the stearic acid.