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A kind of transition metal chalcogenide material and preparation method thereof

A technology of transition metal chalcogenides and compounds, applied in cobalt compounds, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve problems such as difficulties in monitoring and mass production, and difficult dimensions

Active Publication Date: 2019-10-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although great progress has been made, there are still difficulties in easy operation, monitoring and mass production
In addition, the above methods are difficult to prepare two-dimensional TMCs with uniform size and adjustable chemical composition.

Method used

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  • A kind of transition metal chalcogenide material and preparation method thereof
  • A kind of transition metal chalcogenide material and preparation method thereof
  • A kind of transition metal chalcogenide material and preparation method thereof

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preparation example Construction

[0049] The present invention provides a method for preparing a transition metal chalcogenide material, which comprises the following steps:

[0050] (1) Mixing the cobalt-iron inorganic salt solution, the inorganic alkali solution and the sodium nitrate solution to react to obtain the cobalt-iron hydrotalcite nanosheets;

[0051] The solute in the cobalt-iron inorganic salt solution is an inorganic cobalt salt and an inorganic iron salt;

[0052] The solvent of the sodium nitrate solution is formamide and water;

[0053] (2) Under an inert atmosphere, reduce sodium borohydride and selenium powder in water to obtain a reduction reaction solution;

[0054] Under an inert atmosphere, mixing the reduction reaction liquid and absolute ethanol to obtain a reduction treatment liquid;

[0055] (3) Under an inert atmosphere, mixing the hydrosol of the cobalt-iron hydrotalcite nanosheets and the reduction treatment solution to perform a primary selenization reaction to obtain a selenization reacti...

Embodiment 1

[0076] Solution A: Co(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 ·9H 2 O is dissolved in 60 mL of deionized water, mixed well, and used as an inorganic salt solution for later use. Co(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 ·9H 2 The ratio of the amount of O substance is 2:1, of which Fe(NO 3 ) 3 ·9H 2 O is 0.6mmol;

[0077] Solution B: Dissolve NaOH in 54mL deionized water as an alkaline solution for later use, NaOH is 13.5mmol;

[0078] Solution C: NaNO 3 Dissolved in deionized water containing 25% (volume ratio) of formamide for later use, in which NaNO 3 0.6mmol; Among them, 15mL formamide, 45mL deionized water;

[0079] Solution A and solution B were added dropwise to solution C at the same time at a uniform rate, and the overall pH condition was controlled to 9-10. The dropwise addition was carried out while stirring under 80°C oil bath conditions. The titration was completed within 30 minutes. After the reaction, the obtained hydrotalcite colloid was taken out by centrifugal separation, and the ...

Embodiment 2

[0085] Solution A: Co(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 ·9H 2 O is dissolved in 60 mL of deionized water, mixed well, and used as an inorganic salt solution for later use. Co(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 ·9H 2 The ratio of the amount of O substance is 3:1, where Fe(NO 3 ) 3 ·9H 2 O is 0.6mmol;

[0086] Solution B: Dissolve NaOH in 54mL deionized water as an alkaline solution for later use, NaOH is 13.5mmol;

[0087] Solution C: NaNO 3 Dissolved in deionized water containing 25% (volume ratio) of formamide for later use, in which NaNO 3 0.6mmol; Among them, 15mL formamide, 45mL deionized water;

[0088] Solution A and solution B were added dropwise to solution C at the same time at a uniform rate, and the overall pH condition was controlled to 9-10. The dropwise addition was carried out while stirring under 80°C oil bath conditions. The titration was completed within 30 minutes. After the reaction, the obtained hydrotalcite colloid was taken out by centrifugal separation, and the col...

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Abstract

The invention provides a preparation method of a transition metal chalcogenide material. The preparation method provided by the invention is simple in operation and easy to implement, and can be applied to mass production. The invention further provides the transition metal chalcogenide material which is in the form of a sheet with the thickness of 0.9 to 1.2 nm. Results of the embodiments show that the transition metal chalcogenide material obtained by the invention is of a lamellar structure, uniform in distribution, uniform in particle size, good in absorption effect on near-infrared lightand good in photothermal property; the thickness is 1.1 to 1.2 nm; the temperature is increased by 39.6 DEG C under 808 nm laser irradiation, and the photothermal conversion efficiency of the materialcan reach 75.3%; 95% or more than 95% of apoptosis can be caused with 50 [mu]g / ml of the material, and the effect is obvious.

Description

Technical field [0001] The invention relates to the technical field of two-dimensional nanomaterials, in particular to a transition metal chalcogenide material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of nanotechnology, two-dimensional nanomaterials (such as graphene, black phosphorus, etc.) have attracted widespread attention in various fields due to their unique 2D morphology, quantum size effect and versatility. Among all kinds of two-dimensional nanomaterials, transition metal chalcogenide materials have shown good application prospects in catalysis, optoelectronics, energy and biomedicine due to their unique electronic structural characteristics and optoelectronic properties, and have become a research topic. focus. [0003] Since 2004, when Andre Geim and Konstantin Novoselov of the University of Manchester in the United Kingdom published in the Science magazine about stripping graphene from graphite, graphen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/00B82Y30/00B82Y40/00
Inventor 梁瑞政张少敏梅旭安刘宁闫亮卫敏
Owner BEIJING UNIV OF CHEM TECH
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