A Facile and TGA Free Hydrothermal Synthesis of SnS Nanoparticles

Y. P. Venkata Subbaiah; Narayana Thota; M. Raghavender; Y. P. Venkata Subbaiah; G. Hema Chandra; K.T. Ramakrishna Reddy

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자료유형: 학술저널

저자정보: Y. P. Venkata Subbaiah (Yogi Vemana University) Narayana Thota (Yogi Vemana University) M. Raghavender (Yogi Vemana University) Y. P. Venkata Subbaiah (Yogi Vemana University) G. Hema Chandra (Visvesvaraya National Institute of Technology) K.T. Ramakrishna Reddy (Sri Venkateswara University)

저널정보: 성균관대학교 성균나노과학기술원 NANO NANO Vol.12 No.10

발행연도: 2017.1

수록면: 28 - 37 (10page)

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In this paper, we employed a simple and cost-effective thioglycolic acid (TGA) free hydrothermal method, based on thiourea hydrolysis of stannous chloride dihydrate [SnCl2 · 2H2O] at 160 ℃ – 190 ℃ for 6 h, for the synthesis of SnS nanoparticles. The effect of hydrothermal autoclave reaction temperature on various properties of SnS nanoparticles have been examined at length using X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), field-emission scanning electron microscopy attached with EDAX (FE-SEM), transmission electron microscopy (TEM) and ultraviolet-visible (UV-Vis) spectroscopy. The results suggest that the crystallization of orthorhombic SnS nanoparticles, with size varying from 3 nm to 5 nm, formed at RT = 160 ℃. Further, the formation of SnS phase was confirmed by an IR Sn-S characteristic bands around 2350 cm -1, 1041 cm -1 and 570 cm -1, and four distinguished Raman peaks at 95 cm -1, 160 cm -1, 189 cm -1 and 220 cm -1. The mechanism for the formation of SnS nanoparticles have been proposed and discussed. The SnS nanoparticles have exhibited reaction temperature dependent morphological features like nanoflowers, nanoflakes, spherical nanoparticles and nanogranules. The absorbance studies indicated both strong direct and weak indirect allowed transitions for SnS nanoparticles and the associated band gaps were found to be 1.5 eV and 1.19 eV, respectively. The dual band gap combination of SnS would favor strong direct absorption of carriers and improved minority carrier life time due to indirect nature, which means the grown particles are suitable for ideal absorber material for solar cell applications.

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참고문헌 신청

L. Washington II / 2008 / J. Am. Chem. Soc 130:8916

N. Al-Salim / 2007 / Chem. Mater 19:5185

S. Xu / 2006 / J. Am. Chem. Soc 128:1054

W. Lu / 2004 / J. Am. Chem. Soc 126:11798

M. V. Kovalenko / 2007 / J. Am. Chem. Soc 129:11354

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