Synthesis, Characterization and Photocatalytic Performance of SnS Nanofibers and SnSe Nanofibers Derived from the Electrospinning-made SnO2 Nanofibers

Abstract

SnO 2 nanofibers were fabricated by calcination of the electrospun PVP/SnCl 4 composite nanofibers. For the first time, SnS nanofibers and SnSe nanofibers were successfully synthesized by doublecrucible sulfurization and selenidation methods via inheriting the morphology of SnO 2 nanofibers used as precursors, respectively. X-ray diffraction (XRD) analysis shows SnS nanofibers and SnSe nanofibers are respectively pure orthorhombic phase with space group of Pbnm and Cmcm. Scanning electron microscope (SEM) observation indicates that the diameters of SnS nanofibers and SnSe nanofibers are respectively 140.54±12.80 nm and 96.52±14.17 nm under the 95 % confidence level. The photocatalytic activities of samples were studied by using rhodamine B (Rh B) as degradation agent. When SnS or SnSe nanofibers are employed as the photocatalysts, the respective degradation rates of Rh B solution under the ultraviolet light irradiation after 200 min irradiation are 92.55 % and 92.86 %. The photocatalytic mechanism and formation process of SnS and SnSe nanofibers are also provided. More importantly, this preparation technique is of universal significance to prepare other metal chalcogenides nanofibers.

Photochemical Synthesis of Nanosheet Tin Di/Sulfide with Sunlight Response on Water Pollutant Degradation

“…From the inset Figure 7b, by extrapolating the linear part of the transformed (αhν) 2 against photon energy plots the indirect gaps of PS-SnS 2-x were calculated at 2.49 eV. This value is in good agreement with the previous reports on nanostructured SnS 2-x (2.18–2.50 eV) [46,47]. Moreover, the theoretical optical bandgap energy of the PS-SnS 2-x was calculated using the following Einstein’s photoelectric effect formula [36,48]: E g = (1240/λ) eV where λ is the lower cut-off wavelength in nm.…”

Tin-selenide as a futuristic material: properties and applications

“…Li Cheng et al used the RhB solution under UV radiation to check the SnO 2 , SnSe, and SnS nano-fibers' photocatalytic activity. 62 The degradation curve showed a first-order kinetics equation type curve. The degradation rate for RhB was 85.90%, 92.55% and 92.86% for SnO 2 , SnS and SnSe, respectively.…”

“…In a typical experiment, the various dyes' degradation rate is checked using eqn (3). These figures has been adapted/reproduced from ref 62. with permission from Scielo, copyright 2017".…”

Experimental Study of the Tl4PbTe3-Tl9TbTe6-Tl9BiTe6 Section of the Tl-Pb-Bi-Tb-Te System

“…Presently, great interest has devoted to the chalcogenides of heavy metals as prospective functional materials which found applications in the wide range of devices such as computer memories, chemical sensors, photo-detectors, solar cells, thermoelectric and optical devices, and ionic sensors [1][2][3][4] . Some of them expected as a good candidates for use in the spintronic devices 5,6 .…”

“…gr.I4/mcm, a = 8.930; c = 12.598 Å, z=4) 12,13 . The formula Tl 5 Te 3 can thus be rewritten as Tl 16 [TlTe 3 ] 4 . The thallium atoms on the 4c site can be partially or fully replaced by other elements, resulting in a group of ternary compounds: Tl 4 A IV Te 3 and Tl 9 B V Te 6 -type (A IV -Sn, Pb; B V -Sb, Bi) [14][15][16][17] .…”