Synthesis and Photoelectrocatalytic Performance of Sb2S3 Nanorods from Natural Stibnite

doi:10.15541/jim20180006

Abstract

Abstract:

Antimony trisulfide (Sb₂S₃) nanorods were successfully synthesized via hydrothermal method with the assistance of polyethylene glycol (PEG) and N,N-dimethylformamide (DMF), using natural stibnite as precursor. The effects of experimental parameters on the morphology and the properties of the obtained Sb₂S₃ were systematically studied, and the possible formation mechanism of Sb₂S₃ nanorods in the preparation process was also discussed. Phase, compositions, morphology and photoelectric properties of the products were investigated by a series of characterization methods. The photocatalytic activity of nano Sb₂S₃ on the degradation of methyl orange were investigated under the visible light irradiation. The results showed that the Sb₂S₃ nanoflakes formed after hydrothermal synthesis at 160℃ for 12 h, and the nanoflakes would transform into nanorods eventually after N₂-annealing at 400℃ for 1 h. The obtained Sb₂S₃ nanorods with a single crystal structure are typically 2~3 μm in length, 100~200 nm in width, which are direct semiconductor with band gap of 1.66 eV. Photocatalytic degradation rate of the obtained Sb₂S₃ nanorods on methyl orange under visible light irradiation is higher than that of commercial Sb₂S₃, which is up to 87.6% after 60 min degradation, exhibiting obvious visible-light activity.

Key words: natural stibnite, nanorods, hydrothermal synthesis, photocatalytic properties

CLC Number:

TQ135

JIA Si-Qi, JIANG Zheng, CHI Li-Na, YE Ying, HU Shuang-Shuang. Synthesis and Photoelectrocatalytic Performance of Sb₂S₃ Nanorods from Natural Stibnite[J]. Journal of Inorganic Materials, 2018, 33(11): 1213-1218.

Figures/Tables 8

Table 1 Number of product under different preparation conditions

Sample	PEG	Hydrothermal temperature/℃	Heat-treatment temperature/℃
S₁	?	80	-
S₂	?	120	-
S₃	?	160	-
S₄	?	160	200
S₅	?	160	300
S₆	?	160	400
S₇	-	160	400

Fig. 1 XRD patterns for samples prepared at different hydrothermal temperatures and heat-treated at different temperatures

Fig. 2 SEM images of Sb2S3 samples prepared at different hydrothermal temperatures^(a)S1; (b) S2; (c) S3

Fig. 3 SEM images of Sb2S3 samples heat-treated at different temperatures^(a)S4; (b) S5; (c) S6; (d) S7

Fig. 4 (a) TEM and (b) HRTEM images and (c) EDS pattern of S6

Fig. 5 (a) UV-Vis spectra and (b) Tauc plots of nano Sb2S3 prepared at different conditions and commercial Sb2S3

Fig. 6 Photocatalytic degradation curves of samples on methyl orange under visible light irradiation

Fig. 7 XRD patterns of sample S6 (a) before and (b) after photocatalytic reaction

References 17

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Synthesis and Photoelectrocatalytic Performance of Sb₂S₃ Nanorods from Natural Stibnite

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