Synthesis and characterization of branched yttrium hydroxide fluoride microcrystals with hierarchical tubular structure

• Published in: Journal of rare earths Vol. 30; no. 4; pp. 378 - 382
• Main Author: 田俐 蒋文韬 孙起亮 刘金
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-04-2012
• Subjects: Branched; branched microcrystals; Fluorides; hydrothermal synthesis; Hydroxides; Microcrystals; Rare earth metals; rare earths; Scanning electron microscopy; Substitution reactions; Yttrium; yttrium hydroxide fluoride; 微晶; 扫描电子显微镜; 氟化钠; 氢氧化钠; 硝酸钇; 管状结构; 结构层; 表征; hydrothermal synthesis; branched microcrystals; yttrium hydroxide fluoride; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(12)60054-4

Hexagonal yttrium hydroxide fluoride microcrystals were prepared by a two-step hydrothermal routte using yttrium nitrate, sodium hydroxide and sodium fluoride as raw materials to react in propanetriol solvent. The samples were characterized by powder X-ray diffraction （XRD）, energy dispersive spectrum （EDS）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, Fourier trans- form infrared spectroscopy （FT-1R）, thermogravimetre and differential-thermogravimetric analysis （TG-DTA）, which revealed that Y（OH）2.14F0.86 microerystals were multi-branched and that the branches of Y（OH）2A4F0.86 microcrystals were composed of hierarchical tubes. This novel multi-branched and intriguing hierarchical tubular structure of yttrium hydroxide fluoride maybe has a potential application in photoelectric crystals. The formation of branched Y（OH）2.14F0.86 microcrystals with hierarchical tubular structure were due to the substitution reaction and Oswald ripening.