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Method for preparing sandwich hollow titania nanomaterials by template-free method

A sandwich hollow, nano-material technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of poor shape controllability, low production efficiency, time-consuming and labor-intensive operation, etc., to achieve broad industrial The effect of application prospect, low cost and easy availability of raw materials

Inactive Publication Date: 2015-10-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the template method also has some shortcomings. For example, the soft template method mostly uses some expensive surfactants and their aggregates. Although the process is flexible, the shape controllability is not strong, and the synthesis cost is high; the hard template method Although the controllability is strong, because the template needs to be synthesized first, and then removed with strong acid or alkali, the operation is time-consuming and laborious, which is not only harmful to the environment, but also has low production efficiency.

Method used

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  • Method for preparing sandwich hollow titania nanomaterials by template-free method
  • Method for preparing sandwich hollow titania nanomaterials by template-free method
  • Method for preparing sandwich hollow titania nanomaterials by template-free method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] a. Weigh 20.0 g of deionized water and 0.13 mol of glycerin with an electronic balance, put them into a beaker and mix them evenly;

[0015] b. Weigh 0.0013 mol titanium sulfate (Ti(SO 4 ) 2 ) into the above solution and continue to stir for 0.5 h to make it evenly mixed;

[0016] c. Pour the above mixed solution into a polytetrafluoroethylene-lined autoclave and react at 110 °C for 6 h;

[0017] d. After the reaction is complete, take the product out of the reactor, wash and centrifuge it repeatedly with deionized water and ethanol, dry the product at 60 °C, and finally place it in the air atmosphere of the muffle furnace for calcination at 550 °C 3 h, to obtain the sandwich hollow TiO prepared by the present invention 2 nanomaterials.

[0018] The prepared samples were characterized for their physical properties, and some of the results are shown in the accompanying drawings. The obtained material is a sandwich hollow structure, and its particle size is between 7...

Embodiment 2

[0020] The preparation process and steps of this embodiment are exactly the same as in Example 1, except that in step a

[0021] Weigh 15.0 g of deionized water and 0.13 mol of glycerin with an electronic balance, put them into a beaker and mix them evenly.

[0022] The obtained result is basically similar to Example 1, except that the obtained TiO 2 The morphology of nanomaterials is not uniform, and the agglomeration is serious.

Embodiment 3

[0024] The preparation process and steps of this embodiment are exactly the same as in Example 1, except that in step c

[0025] The above mixed solution was poured into a polytetrafluoroethylene-lined autoclave and reacted at 110 °C for 2.5 h.

[0026] Gained result has bigger difference with embodiment 1, the TiO that makes 2 It is a solid particle with a rough surface and a burr-like structure.

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Abstract

The invention relates to a method for preparing a sandwich hollow titanium dioxide nanometer material by a template-free method. The present invention uses titanium sulfate (Ti(SO4)2) as a titanium source, water as a solvent, and glycerin as a crystallization aid, adopts a simple, effective, economical and environmentally friendly template-free method, and through a simple hydrothermal synthesis process, to obtain TiO2 nanomaterials with a unique sandwich hollow structure. It can be seen from the XRD spectrum that the prepared sandwich hollow TiO2 nanomaterial has a typical anatase structure. The sandwich hollow TiO2 nanomaterials prepared by this method have potential application prospects in the fields of environment, energy and biomedicine.

Description

technical field [0001] The invention relates to a method for preparing a hollow titanium dioxide nanometer material, in particular to a method for preparing a sandwich hollow titanium dioxide nanometer material by a template-free method. Background technique [0002] As a very important semiconductor metal oxide, titanium dioxide (TiO 2 ) Nanomaterials have many excellent characteristics. It not only has a very strong oxidizing ability to oxidize organic matter in water, but also has the characteristics of strong affinity, stable chemical properties, non-toxicity, and low cost. Therefore, it is widely used in various fields. Such as chromatographic separation, catalytic redox reaction, visible light catalytic water splitting, dye-sensitized solar cells, lithium-ion batteries, gas sensors and drug delivery, etc. However, during its application, it was found that the properties of materials are affected by many factors, such as particle size, specific surface area, porosity, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C01G23/08B82Y30/00B82Y40/00
Inventor 张海娇焦正王栋海高仁美伍路周洪顺
Owner SHANGHAI UNIV