Synthesis of Micro/Nano VO2 Structure by Hydrothermal Method

The Manh Nguyen1, Hong Quan Duong2, Xuan Thang Cao2, Hung Vuong Pham1,
1 Hanoi University of Science and Technology – No. 1, Dai Co Viet, Hai Ba Trung, Hanoi, Vietnam
2 Vietnam National University Ho Chi Minh City, National Key Laboratory on Control and Sensor Technologies (DCSEALAB), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam

Main Article Content

Abstract

Vanadium dioxide was synthesized successfully by hydrothermal method. C₂H₅O₄ was played as reducing agent for reducing V⁵⁺ to V⁴⁺ from V₂O₅ precursor. In this article, we have studied the effect of hydrothermal time (6 h–24 h), V₂O₅ concentration (0.1 M–0.4 M) and ratio of V₂O₅/C₂H₅O₄ (1 : 2.4; 1 : 3; 1 : 4) to the structure and morphology of VO₂. Phase formation of VO₂ was analyzed by X-ray diffraction. Morphology and size of micro/nano structures were examined by FE-SEM. The synthesized VO₂ structures were showed variation in particle size and morphology. VO₂ nanorods, micro rotor and nanoplate were observed when ratio of V₂O₅/C₂H₅O₄ was 1 : 2.4, 1 : 3 and 1 : 4, respectively. Moreover, the surface of micro rotor became well-defined morphology with increasing hydrothermal time from 6 h to 24 h. This research showed the way to control the structure and morphology of VO₂ which was useful for VO₂ research area.

Article Details

References

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