Characterization and hydrothermal synthesis of nanocrystalline α-Fe2O3 with different morphologies. (4th July 2018)

• Record Type: Journal Article
• Authors: Zhou, Ying; Yu, Longlong; Xie, Xinyu; Tang, Peisong; Chen, Haifeng
• Is Part Of: Ferroelectrics. Volume 530(2018)
• Page Start: 32
• Page End: 38
• Publication Date: 2018-07-04
• Subjects: α-Fe2O3 -- hydrothermal method -- morphology -- nanomaterials; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2018.1454075
• Languages: English
• ISSNs: 0015-0193

Abstract

ABSTRACT: The nanocrystalline α-Fe2 O3 was prepared using ferric(III) chloride and sodium hydroxide by a hydrothermal process. The effects of hydrothermal reaction temperature and time, concentration of sodium hydroxide on the morphology of α-Fe2 O3 were studied. The prepared α-Fe2 O3 products were characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that hydrothermal reaction temperature and time, concentration of sodium hydroxide have all effects on morphology of α-Fe2 O3 . When hydrothermal reaction temperature is raised from 140°C to 200°C, the morphologies of α-Fe2 O3 samples are gradually converted from a needle-like mixture to a single flaky. When hydrothermal reaction time increased from 8 h to 24 h, the morphologies of α-Fe2 O3 samples gradually changed from grain to flaky. And when concentration of sodium hydroxide increased from 1 mol/L to 6.5 mol/L, the morphologies of α-Fe2 O3 samples changed from quasi-cubic to sheet.