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Title: Hydrothermal synthesis and formation mechanism of hexagonal yttrium hydroxide fluoride nanobundles

Graphical abstract: The formation of yttrium hydroxide fluorides nanobundles can be expressed as a precipitation transformation from cubic NaYF{sub 4} to hexagonal NaYF{sub 4} and to hexagonal Y(OH){sub 2.02}F{sub 0.98} owing to ion exchange. - Highlights: • Novel Y(OH){sub 2.02}F{sub 0.98} nanobundles have been successfully prepared by hydrothermal method. • The branched nanobundles composed of numerous oriented-attached nanoparticles has been studied. • The growth mechanism is proposed to be ion exchange and precipitation transformation. - Abstract: This article presents the fabrication of hexagonal yttrium hydroxide fluoride nanobundles via one-pot hydrothermal process, using yttrium nitrate, sodium hydroxide and ammonia fluoride as raw materials to react in propanetriol solvent. The X-ray diffraction pattern clearly reveals that the grown product is pure yttrium hydroxide fluoride, namely Y(OH){sub 2.02}F{sub 0.98}. The morphology and microstructure of the synthesized product is testified to be nanobundles composed of numerous oriented-attached nanoparticles as observed from the field emission scanning electron microscopy (FESEM). The chemical composition was analyzed by the energy dispersive spectrum (EDS), confirming the phase transformation of the products which was clearly consistent with the result of XRD analysis. It is proposed that the growth of yttrium hydroxide fluoride nanobundles be attributed to ion exchange and precipitationmore » transformation.« less
Authors:
 [1] ;  [2] ; ; ; ;  [1] ;  [3]
  1. Department of Material Science and Engineering, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201 (China)
  2. (China)
  3. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)
Publication Date:
OSTI Identifier:
22285183
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 11; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHEMICAL COMPOSITION; CRYSTAL GROWTH; FLUORIDES; HYDROTHERMAL SYNTHESIS; INORGANIC COMPOUNDS; NANOSTRUCTURES; PHASE TRANSFORMATIONS; PRECIPITATION; RAW MATERIALS; SODIUM HYDROXIDES; X-RAY DIFFRACTION; YTTRIUM HYDROXIDES; YTTRIUM NITRATES