Two-dimensional ultrathin tin sulfide nanosheets, and preparation method and application thereof

A nanosheet, tin sulfide technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., to achieve the effect of good cycle performance, simple process and high specific capacitance

Inactive Publication Date: 2015-04-01
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the controllable synthesis of ultrathin tin sulfide nanosheets by solid-liquid phase method

Method used

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  • Two-dimensional ultrathin tin sulfide nanosheets, and preparation method and application thereof
  • Two-dimensional ultrathin tin sulfide nanosheets, and preparation method and application thereof
  • Two-dimensional ultrathin tin sulfide nanosheets, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] At room temperature, in a clean and dry 100mL three-necked flask, add 0.25mmol Sn 2 Cl 4 (Tu) 5 2H 2 O and 10mL oleic acid, ultrasonic 5min to obtain a suspension. Heat the mixture in a sand bath at 5 °C min -1 The heating rate is increased from room temperature to 180-230 ° C, and the heating is stopped after 30 minutes of heat preservation. During the heating process, it can be seen that before 100°C, the color of the suspension does not change substantially and is colorless. Subsequently, bubbles gradually emerged, and the solid matter began to decompose, and the color gradually changed from colorless to light yellow, then brown, and finally dark brown. After the reaction, the reaction product was dispersed and settled with absolute ethanol, centrifuged, washed with ethanol and n-hexane, and dried by centrifugation. The final target product was vacuum-dried at room temperature for 3-5 hours for subsequent analysis and characterization.

[0035] The products wer...

Embodiment 2

[0037] At room temperature, in a clean and dry 100mL three-necked flask, add 0.25mmol Sn 2 Cl 4 (Tu) 5 2H 2 O and 10mL oleic acid, ultrasonic 5min to obtain a suspension. Heat the mixture in a sand bath at 5 °C min -1 The heating rate is increased from room temperature to 300-330 ° C, and the heating is stopped after 30 minutes of heat preservation. After the reaction, the product was naturally cooled to room temperature and centrifuged, washed with n-heptane and absolute ethanol several times, and dried in a vacuum oven for subsequent analysis and characterization.

[0038] Same as in Example 1, the target product SnS nanocrystals were characterized by X-Ray energy spectrometer (EDX), element surface distribution map (Mapping), XRD, TEM and HRTEM, etc. XRD results see Figure 5 .

Embodiment 3

[0040] At room temperature, in a clean and dry 100mL three-necked flask, add 0.25mmol Sn 2 Cl 4 (Tu) 5 2H 2 O and 10mL oleic acid, ultrasonic 5min to obtain a suspension. Heat the mixture in a sand bath at 5 °C min -1 The heating rate is increased from room temperature to 260-295 ° C, and the heating is stopped after 30 minutes of heat preservation. After the reaction, the product was naturally cooled to room temperature and centrifuged, washed with n-heptane and absolute ethanol several times, and dried in a vacuum oven for subsequent analysis and characterization.

[0041] Same as in Example 1, the target product SnS nanocrystals were characterized by X-Ray energy spectrometer (EDX), element surface distribution map (Mapping), XRD, TEM and HRTEM, etc. XRD results see Figure 5 .

[0042] According to Examples 1-3, the method of the present invention adopts solid-liquid phase chemical reaction to synthesize tin sulfide nanocrystals, and the hexagonal phase SnS can be o...

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Abstract

The invention relates to a preparation method of two-dimensional ultrathin tin sulfide nanosheets and a material prepared from the same. Sn2Cl4(Tu)5.2H2O is used as a precursor and subjected to thermal decomposition at 230 DEG C by a novel solid-liquid reaction route to synthesize the graphene-like ultrathin SnS2 nanosheets in a controllable way. The reaction temperature is controlled to obtain the pure hexagonal-phase SnS2 nanosheets, mixed-phase SnS2-SnS and pure orthorhombic-phase SnS nanosheets. The obtained hexagonal-phase SnS2 nanosheets have high mass specific capacitance (the specific capacitance is 614.6F g<-1> when the current density is 1A g<-1> and excellent stability), and are much better and the mixed-phase SnS2-SnS and pure orthorhombic-phase SnS nanosheets. The hexagonal-phase SnS2 nanosheets can be used as an active material for constructing high-performance supercapacitors.

Description

technical field [0001] The invention relates to a metal sulfide nano-tin sulfide, in particular to a two-dimensional ultra-thin tin sulfide nano-sheet and its preparation method and application, through a solid-liquid phase chemical reaction route to controllable synthesis of two-dimensional ultra-thin SnS on a large scale 2 Nanosheets, mixed-phase SnS 2 -SnS and pure orthorhombic SnS nanosheets, the two-dimensional ultrathin SnS 2 Nanosheet applications have excellent performance in supercapacitors. Background technique [0002] Supercapacitors are expected to become a new type of green energy in this century due to their advantages such as low cost, fast charge-discharge process, environmental friendliness, long cycle life, and high power density. Based on the above advantages, in recent years, people have been devoting themselves to the development of supercapacitors with high specific capacitance, high specific power and high specific energy, which are used in differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00B82Y30/00B82Y40/00H01G11/24H01G11/30
CPCY02E60/13
Inventor 包建春刘苏莉张龙张春丽韩敏戴志晖
Owner NANJING NORMAL UNIVERSITY
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