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

田俐^1,2，蒋文韬¹，孙起亮¹，刘金¹

1. Department of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology2. School of Chemistry and Chemical Engineering, Central South University

摘 要：Hexagonal yttrium hydroxide fluoride microcrystals were prepared by a two-step hydrothermal route 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-IR）, thermogravimetre and differential-thermogravimetric analysis （TG-DTA）, which revealed that Y（OH）2.14F0.86 microcrystals were multi-branched and that the branches of Y（OH）2.14F0.86 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.

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