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A simple method to synthesize Dy(OH)(3) and Dy(2)O(3) nanotubes
An-Wu Xu1, Yue-Ping Fang, Li-Ping You
1School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275, China.
Journal of the American Chemical Society
|February 6, 2003
Summary
Researchers synthesized dysprosium(III) hydroxide (Dy(OH)(3)) and dysprosium(III) oxide (Dy(2)O(3)) nanotubes using a simple hydrothermal method. This technique also produced holmium nanotubes, indicating a versatile approach for rare-earth oxide nanomaterials.
Area of Science:
- Materials Science
- Nanotechnology
- Inorganic Chemistry
Background:
- Rare-earth metal oxides are crucial in various applications.
- Developing efficient synthesis methods for nanostructured rare-earth materials is essential.
- Previous methods for producing rare-earth nanotubes were limited.
Purpose of the Study:
- To report the first synthesis of dysprosium(III) hydroxide (Dy(OH)(3)) and dysprosium(III) oxide (Dy(2)O(3)) nanotubes.
- To explore the applicability of the synthesis method for other rare-earth elements.
- To elucidate the growth mechanism of the nanotubes.
Main Methods:
- Facile hydrothermal treatment of bulky Dy(2)O(3) crystals.
- Calcination of Dy(OH)(3) nanotubes to yield Dy(2)O(3) nanotubes.
- Application of the same method to synthesize holmium(III) hydroxide (Ho(OH)(3)) and holmium(III) oxide (Ho(2)O(3)) nanotubes.
Main Results:
- Successfully synthesized Dy(OH)(3) nanotubes for the first time.
- Produced Dy(2)O(3) nanotubes via calcination of the hydroxide precursor.
- Achieved synthesis of Ho(OH)(3) and Ho(2)O(3) nanotubes using the identical hydrothermal approach.
- Identified dissolution-recrystallization as the primary growth mechanism.
Conclusions:
- The facile hydrothermal method is effective for synthesizing rare-earth hydroxide and oxide nanotubes.
- The method is adaptable for producing nanotubes of different rare-earth elements like holmium.
- The dissolution-recrystallization process is key to nanotube formation in this system.
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01:371° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism
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