Preparation method of stannic oxide nanocrystalline loaded tin disulfide nanosheet composite nanomaterial

A nanocrystalline composite and tin disulfide technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of difficulty in controlling the degree of sulfidation, easy aggregation of nanoparticles, etc., and achieve improved photocatalysis Reactivity, avoiding agglomeration, effect of simple process

Active Publication Date: 2015-10-28
LINGNAN NORMAL UNIV
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Problems solved by technology

In addition, SnO2 materials have an inherent defect in the process of photocatalytic degradation: the electron/hole pairs generated by SnO2 will recombine in large quantities under light irradiation, Therefore, only a small number of electron/hole pairs can be utilized by the photocatalytic reaction
The two-step method is to prepare tin dioxide nanoparticles first, and then partially vulcanize them into ti

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  • Preparation method of stannic oxide nanocrystalline loaded tin disulfide nanosheet composite nanomaterial
  • Preparation method of stannic oxide nanocrystalline loaded tin disulfide nanosheet composite nanomaterial
  • Preparation method of stannic oxide nanocrystalline loaded tin disulfide nanosheet composite nanomaterial

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[0030] Example 1

[0031] A method for preparing tin disulfide nanosheets loaded tin dioxide nanocrystalline composite nanomaterials includes the following steps:

[0032] S1. Preparation of tin disulfide nanosheets: 9mmol L-cysteine ​​and 1.5mmol tin tetrachloride are dissolved in 60ml of deionized water under stirring to form a clear solution, the molar concentration of tin ions is 0.025mol / L; The above solution was transferred to a reaction kettle, heated under hydrothermal conditions at 180°C for 10 hours, and then naturally cooled. The resulting pale yellow precipitate was rinsed with deionized water and absolute ethanol for three times, centrifuged and dried in vacuum to obtain the product tin disulfide SnS 2 Nanosheets.

[0033] S2. Preparation of composite material: Dissolve 2mmol of tin tetrachloride and 2mmol of vitamin C in 60ml of deionized water under stirring to form a clear solution, the molar concentration of tin ions is 0.033mol / L; according to the molar ratio of t...

Example Embodiment

[0036] Example 2

[0037] A method for preparing tin disulfide nanosheets loaded tin dioxide nanocrystalline composite nanomaterials includes the following steps:

[0038] S1. Preparation of tin disulfide nanosheets: Dissolve 24mmol L-cysteine ​​and 3mmol tin tetrachloride in 60ml deionized water under stirring to form a clear solution. The molar concentration of tin ions is 0.05mol / L; The solution was transferred to the reactor, heated under hydrothermal conditions at 180°C for 10 hours, and then naturally cooled. The obtained light yellow precipitate was rinsed with deionized water and absolute ethanol three times, centrifuged and dried in vacuum to obtain the product tin disulfide SnS 2 Nanosheets.

[0039] S2. Preparation of composite material: Dissolve 3mmol of tin tetrachloride and 3mmol of vitamin C in 60ml of deionized water under stirring to form a clear solution, the molar concentration of tin ion is 0.05mol / L; according to the molar ratio of tin ion to tin disulfide Weig...

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Abstract

The invention discloses a preparation method of a stannic oxide nanocrystalline loaded tin disulfide nanosheet composite nanomaterial. The method comprises the following steps that S1, a tin disulfide nanosheet is prepared, wherein L-cysteine and stannic chloride are dissolved in water and are mixed evenly, light yellow sediment is obtained after a hydrothermal reaction, rinsing, centrifugal separation and drying are carried out, and the SnS2 nanosheet is obtained; S2, a composite material is prepared, wherein stannic chloride and vitamin C are dissolved in water, the SnS2 nanosheet prepared in the S1 is dispersed in the solution, then NaHCO3 is added, even mixing is carried out, a microwave reaction is carried out under the backflow condition, cooling, rinsing, centrifugal separation and drying are carried out, and the composite nanomaterial SnO2/SnS2 is obtained. The molar ratio of the L-cysteine to the stannic chloride added in the S1 is 6-8:1, and the molar ratio of the stannic chloride added in the S2 to the SnS2 nanosheet is 1-5:1. According to the prepared SnO2/SnS2 composite material, SnO2 nanocrystalline is evenly dispersed and firmly loaded on the SnS2 nanosheet, the caking phenomenon of the SnO2 nanocrystalline is avoided, and the obviously-enhanced catalytic property is shown.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic micro-nano materials, and in particular relates to a preparation method of tin disulfide nanosheet-loaded tin dioxide nanocrystal composite nanomaterials. Background technique [0002] In contemporary society, photocatalytic degradation of organic pollutants and heavy metal ions in water has received extensive attention in recent years. Tin dioxide (SnO 2 ) is regarded as a commercial titania catalyst TiO due to its relatively good photocatalytic stability and catalytic activity. 2 potential substitutes. SnO 2 The catalyst performed well under ultraviolet light, but its band gap (Eg = 3.6 eV) was large, so its catalytic activity under visible light was limited. Since the proportion of ultraviolet light energy in solar energy is very small, only about 4%, but the energy of visible light reaches 43%, so the SnO 2 It is meaningful that the photoresponse range of the catalyst e...

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Application Information

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IPC IPC(8): B01J27/04
Inventor 马琳许丽梅周晓平徐旭耀张玲玲
Owner LINGNAN NORMAL UNIV
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