Controlled synthesis of spherical α-NiS and urchin-like β-NiS microstructures

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Abstract

Spheres and self-assembled wires of α-NiS (the hexagonal phase) have been successfully synthesized by a facile mix solvothermal route (glycol and water). Varying the volume ratio between glycol and water, and leaving the other conditions unchanged, the urchin-like β-NiS (the rhombohedral phase) microstructures were also prepared. The as-obtained products were characterized by means of X-ray powder diffraction patterns (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). The TEM results show that the wires of α-NiS are constructed by a number of spheres of α-NiS as primary building units. On the basis of the TEM results, a phenomenological elucidation of the growth mechanism of α-NiS architectures has been presented as the directional aggregating and the Ostwald ripening. Moreover, the optical properties of the α-NiS and β-NiS microstructures were investigated by the room-temperature ultraviolet-visible (UV-Vis) absorption spectroscopy and the photoluminescence (PL) spectroscopy. © 2014 Copyright Taylor & Francis Group, LLC.

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APA

Liu, S., Shi, Q., Tong, J., Li, S., & Li, M. (2014). Controlled synthesis of spherical α-NiS and urchin-like β-NiS microstructures. Journal of Experimental Nanoscience, 9(5), 475–481. https://doi.org/10.1080/17458080.2012.669853

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