Solvothermal Synthesis of Bi₂Se₃ Hexagonal Nanosheet Crystals

Abstract:

Bismuth selenide (Bi₂Se₃) hexagonal nanosheet crystals with uniform size were successfully prepared via a solvothermal method at 160°C for 22 h using bismuth trichloride(BiCl₃) and selenium powder(Se) as raw materials, sodium bisulfite(NaHSO₃) as a reducing agent, diethylene glycol(DEG) as solvent, and ammonia as pH regulator. Various techniques such as X-ray diffraction (XRD), field-emission scanning electron microscope (FESEM), high-resolution transmission electron microscope (HRTEM), and selected area electron diffraction (SAED) were used to characterize the obtained products. Results show that the as-synthesized samples are pure Bi₂Se₃ hexagonal nanosheet crystals. A possible growth mechanism for Bi₂Se₃ hexagonal nanosheet crystals is also discussed based on the experiment.

• Periodical: Advanced Materials Research (Volumes 236-238)
• Pages: 1712-1716
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.236-238.1712
• Online since: May 2011
• Authors: Hai Tao Liu, Jun Dai, Jia Jia Zhang, Wei Dong Xiang
• Keywords: Bi₂Se₃, Binary Chalcogenide, Semiconductor, Solvothermal Synthesis

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