Situmeang, Rudy and Supryanto, R and Kahar, Lolita N. Albert and Simanjuntak, Wasinton and Sembiring, Simon (2017) Characteristics of Nano-Size LaCrO3 Prepared Through Sol-gel Route Using Pectin as Emulsifying Agent. Oriental Journal of Chemistry, 33 (4). pp. 1705-1713. ISSN 0970-020 X

OJC_Vol33_No4_p_1705-1713 Characteristics of Nano-size LaCrO3 prepared Through Sol-gel Route using pectin as emulsifying agent.pdf

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In this Study, nano-size LaCrO3 was prepared through sol-gel route using pectin as an emulsifying agent, followed by freeze-drying to obtain a solid sample. The sample was prepared by mixing the solution of La(NO3)3. 6H2O and Cr(NO3)3. 9H2O with pectin solution under magnetic stirring. The sample was frozen and subsequently subjected to freeze-drying and calcination treatment at temperatures of 600, 700, and 800 oC for 6 hours. The calcined samples were characterized by several techniques.The phase composition was evaluated using the X-ray diffraction(XRD) technique, followed by crystallite size calculation using Scherrer Methods. The functionality of sample was identified using Fourier transform infrared (FTIR) Spectroscopy, the surface structure in three-dimensional images was analyzed using Transmission Electron Microscopy (TEM), and particle size distribution was determined by Particles Size Distribution (PSA). The results of XRD characterization indicated that materials consist of various crystalline phases, with LaCrO3 as a major phase. FTIR Analysis revealed the existence of both Lewis and Bronsted - Lowry acid sites with Lewis acid as a prominent site, represented by absorption band located at around 1636 cm-1. The sample was found to display relatively homogeneous surface morphology, having the crystallite size in the range of 24 to 25 nm according to Scherrer equation. The PSA analyses revealed increased relative percentages of the nano-size portion in the sample from 22 to 89% as temperatures increased from 600 to 800 oC, with the particle size in the range of 30 to 35 nm as seen by the TEM.

Item Type: Article
Subjects: Q Science > QD Chemistry
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Kimia
Depositing User: Dr. Rudy Tahan Mangapul Situmeang
Date Deposited: 25 Oct 2017 03:32
Last Modified: 25 Oct 2017 03:32

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