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Bi2Te3 dimensional nano tablet, preparation method and applications thereof

A technology of two-dimensional nano- and nano-materials, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the excellent properties of nanosheets are difficult to show, limit the application of two-dimensional nanosheets, Nanosheets are prone to agglomeration and other problems, achieving good photothermal conversion efficiency, improving stability and biocompatibility, good biocompatibility and stability

Active Publication Date: 2015-11-18
JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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Problems solved by technology

According to the reported literature, due to the wide range of sulfur sources and the low toxicity of most of them, there are more studies on transition metal sulfides, while water-soluble tungsten selenide is toxic. At the same time, due to the large specific surface area and surface energy of two-dimensional materials Existence, the exfoliated nanosheets are prone to agglomeration in a short period of time, resulting in a large amount of precipitation in the dispersion, making it difficult to show the excellent performance of the nanosheets, which greatly limits the application of two-dimensional nanosheets in many fields

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  • Bi2Te3 dimensional nano tablet, preparation method and applications thereof
  • Bi2Te3 dimensional nano tablet, preparation method and applications thereof
  • Bi2Te3 dimensional nano tablet, preparation method and applications thereof

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preparation example Construction

[0029] The embodiment of the invention discloses a Bi 2 Te 3 A method for preparing two-dimensional nanosheets, comprising:

[0030] Bi 2 Te 3 Ultrasonic exfoliation of nanomaterials, water and functionalized ligand molecules yields Bi 2 Te 3 A two-dimensional nanosheet; the functionalized ligand molecule is polyvinylpyrrolidone, cytochrome C or bovine serum albumin.

[0031] Bi provided by this application 2 Te 3 The preparation method of two-dimensional nanosheets uses functionalized ligand molecules as stripping agents, which are inserted into the Bi 2 Te 3 In nanomaterials, the formation of Bi 2 Te 3 Two-dimensional nanosheets. Bi prepared by this application 2 Te 3 The two-dimensional nanosheets have uniform particle size, controllable shape, and good water solubility. They not only have good biocompatibility, but also have high photothermal conversion efficiency. They are good photothermal reagents and can be used for tumor phototherapy heat treatment.

[...

Embodiment 1

[0042] (1) Weigh 0.63g bismuth chloride and dissolve in 35mL ethanol and water mixed solvent (V 水 / V 乙 醇 =1:6), stirred magnetically at room temperature for 30min, mixed uniformly, and obtained a colorless solution; then added 0.38g tellurium powder, and continued stirring to fully disperse the tellurium powder;

[0043] (2) Weigh 0.1gNaOH and 0.3gNaBH respectively 4 , added to the above-mentioned uniformly stirred mixed solution, and stirred for 15 minutes;

[0044] (3) Transfer the solution to the lining of a 50mL polytetrafluoroethylene reactor, tighten the lid of the reactor, put it in an oven, and react at a temperature of 180°C for 20h;

[0045] (4) Centrifuge the reactant, wash twice with deionized water, and dry under vacuum at 50°C to obtain Bi 2 Te 3 Nanomaterials, 100mg of the resulting product was redispersed in 100mL of deionized water, and then 100mg of BSA was added, ultrasonically stripped for 5h, and BSA-Bi 2 Te 3 The 2D nanosheets were then centrifuged...

Embodiment 2

[0048] (1) Weigh 0.63g bismuth chloride and dissolve in 35mL ethanol and water mixed solvent (V 水 / V 乙 醇 =1:6), stirred magnetically at room temperature for 30min, mixed uniformly, and obtained a colorless solution; then added 0.38g tellurium powder, and continued stirring to fully disperse the tellurium powder;

[0049] (2) Weigh 0.1gNaOH and 0.3gNaBH respectively 4 , added to the above-mentioned uniformly stirred mixed solution, and stirred for 15 minutes;

[0050] (3) Transfer the solution to the lining of a 50mL polytetrafluoroethylene reactor, tighten the lid of the reactor, put it in an oven, and react at a temperature of 180°C for 20h;

[0051] (4) Centrifuge the reactant, wash twice with deionized water, and dry under vacuum at 50°C to obtain Bi 2 Te 3 Nanomaterials, 100mg of the obtained product was redispersed in 100mL of deionized water, and then 50mg of BSA was added, ultrasonically stripped for 5h, and BSA-Bi 2 Te 3 The 2D nanosheets were then centrifuged a...

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Abstract

The invention provides a preparation method of a Bi2Te3 dimensional nano tablet. The preparation method comprises a step of subjecting a Bi2Te3 nano material, water, and functional ligand molecules to ultrasonic exfoliation so as to obtain the Bi2Te3 dimensional nano tablet; wherein the functional ligand molecule is polyvinylpyrrolidone, cytochrome C, or bovine serum albumin. In the preparation method, the functional ligand molecule is taken as the stripping agent to carry out ultrasonic exfoliation on a Bi2Te3 nano material so as to obtain a functional ligand molecule-Bi2Te3 dimensional nano tablet with high water solubility; and the dimensional nano tablet has the advantages of uniform particle size, controllable morphology, high water solubility, good biocompatibility, and high photo-thermal conversion efficiency, is a good photo-thermal agent, and can be applied to tumor photo-thermal therapy. The provided preparation method can synthesize massive water-soluble Bi2Te3 with a photo-thermal property, the preparation process is simple, the cost is low, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of nanomedical materials, in particular to a Bi 2 Te 3 Two-dimensional nanosheets, their preparation methods and applications. Background technique [0002] With the development of science and technology, more and more diseases have been conquered by humans, but malignant tumors are still a world-class problem until now. Although the current detection methods and treatment techniques have made significant progress, the morbidity and mortality of malignant tumors are still high, surpassing cardiovascular diseases, becoming the leading cause of death for urban residents, and seriously threatening human life and health. Common methods for treating tumors include surgical treatment, chemotherapy and radiotherapy, but these methods have great side effects on the human body. Therefore, people expect to develop a new treatment method, which will greatly improve the cure rate of malignant tumors. [0003] Photot...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y30/00B82Y40/00
Inventor 姜秀娥白静贾潇丹
Owner JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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