Bi<SUB>2</SUB>S<SUB>3</SUB>纳米带的制备及其谱学性能研究

doi:10.3964/j.issn.1000-0593(2009)01-0048-04

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Abstract In the present study, bismuth sulfide (Bi₂S₃) nanoribbons were prepared by the hydrothermal method using bismuth nitrate(Bi (NO₃)₃·5H₂O), thioacetamide (C₂H₅NS) and nitrilotriacetic acid (C6H₉NO₆) as raw materials at 180 ℃ for 12 h. The reaction time was largely reduced and the route has been unreported. The constituent, structure and morphology of the products were characterized by XRD, XPS and TEM, respectively. The powder X-ray diffraction (XRD) pattern shows that the Bi2S3 crystals belong to the orthorhombic phase (JCPDS：17-320) with calculated lattice constants a=1.110 6 nm, b=1.099 3 nm and c=0.389 2 nm, which are consistent with the reported values (a=1.114 9 nm, b=1.130 4 nm and c=0.398 1 nm). Transmission electron microscopic (TEM) studies reveal that the appearance of as-prepared Bi₂S₃ is nanoribbon-like with the typical width of about 100 nm; and the high-resolution transmission electron microscope (HRTEM) image shows that the crystal grows along the y axis. The quantification of X-ray photoelectron spectra (XPS) analysis peaks gives an atomic ratio of 2∶3 for Bi∶S, which is consistent with the given formula of Bi₂S₃. Furthermore, the Raman and UV-Vis spectra of the product were also studied. Compared with bulk Bi₂S₃ (236 cm^-1), the Raman absorption band of the Bi₂S₃ nanoribbons (195 cm^-1) red-shifts 41 cm^-1,which is because of the surface effect of nanomaterials. Furthermore, the product has absorption at the wavelength of about 450 nm in the UV-Vis region. The direct bang gap energy (E_g) was estimated to be about 1.58 eV(E_g of the bulk Bi₂S₃ is 1.3 eV), which indicates that the product has potential application in the optical and electrical areas.

Key words：Bi₂S₃ nanoribbons;Band gap;Spectral characteristics

Received: 2007-09-19 Accepted: 2007-12-18

ZTFLH:

O433.1

Corresponding Authors: YANG Xu-jie E-mail: jizmriddle@yahoo.com.cn

Cite this article:

LU Juan,HAN Qiao-feng,YANG Xu-jie, et al. Study on the Preparation and Spectral Characteristics of Bi₂S₃ Nanoribbons[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(01): 48-51.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2009)01-0048-04 OR https://www.gpxygpfx.com/EN/Y2009/V29/I01/48

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