Co-Precipitation Synthesis of Lanthanum Borates with Different Morphologies

• Published in: Glass physics and chemistry 2023-02, Vol.49 (1), p.92-97
• Main Authors: Argun, Sevgi, Dumanli, F. Tugce Senberber, Kipcak, Azmi Seyhun, Tugrul, Nurcan, Derun, Emek Moroydor
• Format: Article
• Language: English
• Subjects: Borates; Boron compounds; Capping; Ceramics; Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Composites; Coprecipitation; Electron microscopes; Formulations; Fourier transforms; Glass; Infrared spectroscopy; Lanthanum; Materials Science; Natural Materials; Particle size; Physical Chemistry; Scanning electron microscopy; Sodium tetraborate; X-ray diffraction
• ISSN: 1087-6596; 1608-313X
• DOI: 10.1134/S108765962260020X

In this study, different formulations of lanthanum borates were successfully prepared by using two-step co-precipitation method. In the first step of hydrothermal synthesis, lanthanum source was selected as La(NO 3 ) 3 .6H 2 O and boron source was selected as Na 2 B 4 O 7 ·10H 2 O. Capping agents were selected as C 18 H 34 O 2 (OA), C 19 H 42 BrN (CTAB), C 6 H 15 N (TEA) and C 4 H 7 NO (PVP). The synthesis conditions were set to 180°C reaction temperature and 4 h reaction time, capping agents were added as 1 ml. After the synthesis products were purified and dried. At the second-step dried powders were pelleted and calcined for 2 h at 1000°C in air atmosphere. Characterization studies of X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and Scanning electron microscope (SEM) were applied to final products. According to the XRD results, three different phases were obtained as La(BO 2 ) 3 , LaBO 3 and LaB 3 O 6 , with powder diffraction file number (PDF no.) of 00-023-1140, 00-012-0762 and 01-073-1150. Obtained FTIR spectrum band values were consistent with the boron compounds and SEM analysis showed that the particle sizes of 260–300 nm obtained at non-capped product and particle sizes decreased in the capped products.