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Synthetic method of MoS2/SnS nanometer heterojunction

A synthesis method and heterojunction technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve the effects of easy operation, simple synthesis process, and high product purity

Active Publication Date: 2017-11-07
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Synthesis of MoS by hydrothermal method 2 nanopowders, followed by a two-step method to synthesize MoS 2 / SnS nano-heterojunction, the product is expected to obtain excellent photocatalytic performance under visible light conditions, however MoS 2 / SnS heterogeneous combination method has not been reported yet

Method used

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  • Synthetic method of MoS2/SnS nanometer heterojunction

Examples

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Embodiment 1

[0032] (1) Take a certain amount of ammonium molybdate and thiourea and dissolve them in deionized water respectively, and obtain uniform ammonium molybdate solution and thiourea solution after fully stirring and dissolving, wherein Mo in ammonium molybdate solution and thiourea solution 4+ , The concentration of thiourea is 1mol / L, 2mol / L respectively;

[0033] (2) Get a part of ammonium molybdate solution and join in two parts of thiourea solutions with a drop rate of 0.5ml / min, obtain a uniform mixed solution after continuous stirring, Mo in the gained mixed solution 4+ The molar ratio with thiourea is 1:4;

[0034](3) Take a certain amount of lysine and dissolve it in deionized water, pour it into the mixed solution of ammonium molybdate and thiourea after stirring, so that lysine and Mo 4+ The molar ratio is 1:10, and the pH of the solution is adjusted to 4.3 by adding glacial acetic acid with a mass fraction of 99.5%. After fully reacting, the solution obtained is moved...

Embodiment 2

[0042] (1) Take a certain amount of ammonium molybdate and thiourea and dissolve them in deionized water respectively, and obtain uniform ammonium molybdate solution and thiourea solution after fully stirring and dissolving, wherein Mo in ammonium molybdate solution and thiourea solution 4+ , The concentration of thiourea is 1mol / L, 2mol / L respectively;

[0043] (2) Get 1 part of ammonium molybdate solution and join in 2 parts of thiourea solutions at a rate of addition of 0.5ml / min, obtain a uniform mixed solution after continuous stirring, Mo in the gained mixed solution 4+ The molar ratio with thiourea is 1:4;

[0044] (3) Take a certain amount of lysine and dissolve it in deionized water, pour it into the mixed solution of ammonium molybdate and thiourea after stirring, so that lysine and Mo 4+ The molar ratio is 1:10, and the pH of the solution is adjusted to 4.6 by adding glacial acetic acid with a mass fraction of 99.5%. After fully reacting, the solution obtained is m...

Embodiment 3

[0050] (1) Take a certain amount of ammonium molybdate and thiourea and dissolve them in deionized water respectively, and obtain uniform ammonium molybdate solution and thiourea solution after fully stirring and dissolving, wherein Mo in ammonium molybdate solution and thiourea solution 4+ , The concentration of thiourea is 1mol / L, 2mol / L respectively;

[0051] (2) Get 1 part of ammonium molybdate solution and join in 2 parts of thiourea solutions at a rate of addition of 0.5ml / min, obtain a uniform mixed solution after continuous stirring, Mo in the gained mixed solution 4+ The molar ratio with thiourea is 1:4;

[0052] (3) Take a certain amount of lysine and dissolve it in deionized water, pour it into the mixed solution of ammonium molybdate and thiourea after stirring, so that lysine and Mo 4+ The molar ratio is 1:10, and the pH of the solution is adjusted to 4.8 by adding glacial acetic acid with a mass fraction of 99.5%. After fully reacting, the solution obtained is m...

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Abstract

The invention relates to a synthetic method of an MoS2 / SnS nanometer heterojunction. The synthetic method comprises the following steps of 1) weighing ammonium molybdate ( (NH4)6Mo7O24.4H2O) and thiourea ((NH2)2CS), and respectively dissolving the ammonium molybdate ( (NH4)6Mo7O24.4H2O) and the thiourea ((NH2)2CS) into deionized water; 2) slowly dropwise adding an ammonium molybdate solution in a thiourea solution, and stirring to enable the ammonium molybdate solution and the thiourea solution to be uniformly mixed; 3) weighing a certain quantity of lysine, dissolving the lysine into the deionized water, pouring a dissolved solution in a mixed solution of the ammonium molybdate and the thiourea, regulating a pH value to be 4-5, stirring, moving the mixed solution into a reaction kettle, and keeping the temperature for a certain time under the hydrothermal condition with the temperature being 190-200 DEG C; 4) carrying out separation, washing and drying to obtain MoS2; 5) weighing SnCl2, dissolving the SnCl2 into a solvent, stirring, adding the MoS2 in the solvent, and continuously stirring; 6) weighing Na2S.9H2O, dissolving the Na2S.9H2O into the deionized water, dropwise adding a dissolved solution in a mixed solution of the MoS2 and the SnCl2, and stirring to carry out full reaction; and 7) carrying out separation, washing and drying on a reactant to obtain a final product. The synthetic method provided by the invention is simple in synthetic process; the product is high in chemical stability and large in specific surface area and has good visible-light catalytic performance.

Description

technical field [0001] The invention relates to a chemical synthesis method of a sulfide semiconductor nanopowder, in particular to a MoS 2 / SnS nano-heterojunction synthesis method and products. Background technique [0002] Molybdenum disulfide (MoS 2 ) is a typical layered transition metal compound with three crystal structures, namely 1T type, 2H type and 3R type. But the most stable and most studied one is the 2H type, which has a layered structure similar to graphene. 2H-MoS2 nanomaterials belong to the hexagonal crystal system. Each unit has a structure of S-Mo-S, two units form a unit cell, the atoms in the layer are bonded together by covalent bonds, and the layers are linked by van der Waals force. MoS 2 The bandgap width of MoS is about 1.78eV, and it has good photocatalytic activity under the irradiation of visible light source. At the same time, the nanostructured MoS 2 The specific surface area is large, and the adsorption amount of the catalytic reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/10
CPCB01J27/051B01J35/613B01J35/39
Inventor 贾铁昆付芳李婷婷李建伟王孝辉李继利孙中亮
Owner LUOYANG INST OF SCI & TECH
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