Hydrothermal synthesis and formation mechanism of hexagonal yttrium hydroxide fluoride nanobundles

Journal Article · Fri Nov 15 04:00:00 EST 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.07.058· OSTI ID:22285183

Tian, Li ^[1]; Sun, QiLiang; Zhao, RuiNi; He, HuiLin; Xue, JianRong ^[1]; Lin, Jun ^[2]

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1. Department of Material Science and Engineering, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201 (China)
2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)

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 precipitation transformation.

• OSTI ID: 22285183
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 48; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

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