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Tin dioxide nanoflower with hollow structure and preparation method of tin dioxide nanoflower

A technology of tin dioxide and hollow structure, which is applied in the field of nanomaterials, can solve the problems of complex operation, high cost, and inability to prepare tin dioxide nanoparticles with complex shapes, and achieve good repeatability, easy operation, and good monodispersity Effect

Inactive Publication Date: 2015-09-09
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that the preparation method of tin dioxide nanoparticles in the prior art is complex in operation, high in cost, and unable to prepare tin dioxide nanoparticles with complex shapes, and to provide a hollow structure tin dioxide nanoflower and its preparation method

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  • Tin dioxide nanoflower with hollow structure and preparation method of tin dioxide nanoflower
  • Tin dioxide nanoflower with hollow structure and preparation method of tin dioxide nanoflower
  • Tin dioxide nanoflower with hollow structure and preparation method of tin dioxide nanoflower

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preparation example Construction

[0033] The preparation method of the above-mentioned hollow structure tin dioxide nanoflowers comprises the following steps:

[0034] Step 1, preparing solid zinc stannate nanoflowers:

[0035] ZnO, SnCl 4 , NaOH and CTAB are dissolved in water, generally using deionized water, stirring evenly, the stirring speed is generally 1200-1600r / min, and the time is generally 10-40min to obtain a mixed solution, the concentration of ZnO in the mixed solution is 0.003-0.005 mol / L, SnCl 4 The concentration of NaOH is 0.01-0.03 mol / liter, the concentration of CTAB is 0.01-0.03 mol / liter, the concentration of NaOH is 0.1-0.2 mol / liter, and then the mixed solution is moved into the hydrothermal reaction kettle, 160-200 ℃, the reaction After 10-16 hours, the obtained precipitate was washed by centrifugation with deionized water and absolute ethanol three times respectively (centrifugation speed 6500 rpm, centrifugation time 3 minutes), and then dried at 60°C to obtain solid zinc stannate ...

Embodiment 1

[0045] Step 1. Weigh 13mg of ZnO, 240mg of NaOH, 292mg of CTAB and 210mg of SnCl respectively 4 , add 40mL of deionized water, stir at 1600r / min for 10min and mix well to obtain a mixed solution, then transfer the mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 180°C for 12h. Ethanol was centrifuged and washed three times, and then dried at 60°C in an air atmosphere to obtain solid zinc stannate nanoflowers;

[0046] Step 2: Perform high-temperature annealing treatment on the solid zinc stannate nanoflowers at 850° C. in an air atmosphere for 30 minutes, and obtain solid mixed nanoflowers after cooling;

[0047] Step 3: Dissolving 50 mg of solid mixed nanoflowers in 5 mL of 0.25 M nitric acid aqueous solution, standing still for 24 hours, separating, centrifuging and washing with deionized water, and drying at 60° C. to obtain tin dioxide nanoflowers with a hollow structure.

[0048] The morphology of solid zinc stannate nanoflowers, s...

Embodiment 2

[0053] Step 1. Weigh 13mg of ZnO, 240mg of NaOH, 292mg of CTAB and 210mg of SnCl respectively 4 , add 40mL of deionized water, stir at 1500r / min for 10min and mix well to obtain a mixed solution, then transfer the mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 160°C for 16h. Ethanol was centrifuged and washed three times, and then dried at 60°C in an air atmosphere to obtain solid zinc stannate nanoflowers;

[0054] Step 2. Perform high-temperature annealing treatment on the solid zinc stannate nanoflowers at 700° C. in an air atmosphere for 3 hours, and obtain solid mixed nanoflowers after cooling;

[0055] Step 3: Dissolving 50 mg of solid mixed nanoflowers in 5 mL of 0.5 M nitric acid aqueous solution, standing still for 48 hours, separating, washing with deionized water, and drying at 60° C. to obtain tin dioxide nanoflowers with a hollow structure.

[0056] After testing, the specific surface area of ​​the nanoflowers obtained ...

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Abstract

The invention discloses a tin dioxide nanoflower with a hollow structure and a preparation method of the tin dioxide nanoflower, belonging to the technical field of nanomaterials and solving the technical problems that a preparation method of tin dioxide nanoparticles is complex in operation and high in cost and tin dioxide nanoparticles with complex appearances cannot be prepared in the prior art. The nanoflower is composed of more than one subunit, wherein all the subunits share the same geometric central point; each subunit is composed of a hollow tin dioxide sheet layer and a solid tin dioxide sheet layer which are respectively of a regular hexagonal structure; the hollow tin dioxide sheet layer is composed of a shell and an inner cavity; the solid tin dioxide sheet layer is parallel to the hollow tin dioxide sheet layer and shares the same geometric central point with the hollow tin dioxide sheet layer; and the solid tin dioxide sheet layer is arranged in the hollow tin dioxide sheet layer to divide the inner cavity into two regions. The nanoflower is of a hollow hierarchical structure and is good in monodispersity and crystallinity, large in specific surface area and favorable in gas sensibility.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a tin dioxide nanoflower with a hollow structure and a preparation method thereof. Background technique [0002] Tin dioxide, as a wide bandgap n-type semiconductor, has the advantages of good chemical stability, strong corrosion resistance, short gas adsorption and desorption time and high sensitivity, and almost zero absorption in the visible light range. It is widely used in gas sensitive materials, batteries, guided wave optics, transistors, optical sensors and other fields. [0003] In the prior art, the preparation methods of tin dioxide nanoparticles mainly include hydrothermal method and liquid phase deposition method. For example, in 2008, Wu et al. used amino acid-assisted hydrothermal method to prepare tin dioxide nanocrystals with a size less than 10nm (Wu, S., Cao, H., Yin, S., Liu, X., & Zhang, X.2009 .The Journal ofPhysical Chemistry C,113,17893...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02B82Y30/00B82Y40/00
Inventor 曾毅郑伟涛邴一飞王艳哲
Owner JILIN UNIV
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