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Preparation method of lamellar stacking titanium dioxide nanoparticles

A technology of titanium dioxide and nanoparticles, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., to achieve the effect of simple process steps, good process stability and high purity

Active Publication Date: 2015-12-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The titanium dioxide nanosheets prepared by the technical scheme published in the above patents have a rutile structure, but currently, there are few reports on the technical information of using the MAX phase to prepare layered stacked anatase titanium dioxide nanoparticles

Method used

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  • Preparation method of lamellar stacking titanium dioxide nanoparticles
  • Preparation method of lamellar stacking titanium dioxide nanoparticles
  • Preparation method of lamellar stacking titanium dioxide nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Take 1g of Ti 3 AlC 2 , added to 10mL, 40% hydrofluoric acid, and magnetically stirred for 24 hours;

[0031] 2. Centrifuge and wash the stirred solution to pH=6, vacuum at 1000 Pascals, and dry for 12 hours to obtain the two-dimensional material MXene;

[0032] 3. Take 0.2g of MXene, add it to 20mL of deionized water, heat at 200°C for 5 hours, then centrifuge and wash until pH=7, vacuum at 1000 Pascals, and dry for 12 hours;

[0033] 4. Put the dried product into a high-temperature furnace, oxidize it at 300°C for 3 hours, and the obtained product is layered stacked titanium dioxide nanoparticles.

[0034] See attached figure 1 , which is the XRD spectrum of titanium dioxide nanoparticles provided in this implementation case. It can be seen from the figure that, compared with the standard card JCPDSNo.21-1272, its XRD diffraction peaks completely correspond to the standard spectrum of anatase titanium dioxide, and 11 diffraction peaks correspond to (101), (103)...

Embodiment 2

[0038] The present embodiment is a kind of preparation method of layered stacking titanium dioxide nanoparticles, the method is based on Ti 3 AlC 2 As raw material, acidic solution was used to corrode Ti 3 AlC 2, remove the Al atomic layer to generate the two-dimensional material MXene, and then use the two-dimensional material MXene as a precursor to undergo a hydrothermal reaction and an oxidation reaction in turn to obtain the layered stacked titanium dioxide nanoparticles, which specifically include the following steps:

[0039] (1) the preparation mass concentration is the acidic solution of 60%, adds Ti 3 AlC 2 , fully stirred, and then centrifuged and washed until the pH of the supernatant was 5, and vacuum-dried to obtain the two-dimensional material MXene;

[0040] (2) Add the two-dimensional material MXene prepared in step (1) into deionized water, transfer it to a hydrothermal reaction kettle, and perform a hydrothermal reaction. After the reaction is completed,...

Embodiment 3

[0047] The present embodiment is a kind of preparation method of layered stacking titanium dioxide nanoparticles, the method is based on Ti 3 AlC 2 As raw material, acidic solution was used to corrode Ti 3 AlC 2 , remove the Al atomic layer to generate the two-dimensional material MXene, and then use the two-dimensional material MXene as a precursor to undergo a hydrothermal reaction and an oxidation reaction in turn to obtain the layered stacked titanium dioxide nanoparticles, which specifically include the following steps:

[0048] (1) Prepare an acidic solution with a mass concentration of 10%, add Ti 3 AlC 2 , fully stirred, and then centrifuged and washed until the pH of the supernatant was 7, and vacuum-dried to obtain the two-dimensional material MXene;

[0049] (2) Add the two-dimensional material MXene prepared in step (1) into deionized water, transfer it to a hydrothermal reaction kettle, and perform a hydrothermal reaction. After the reaction is completed, cent...

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Abstract

The invention relates to a preparation method of lamellar stacking titanium dioxide nanoparticles. The preparation method comprises the steps of taking Ti3AlC2 as a material, corroding the Ti3AlC2 by adopting an acid solution, removing an Al atomic layer, and generating a two-dimensional material MXene, then taking the two-dimensional material MXene as a precursor, performing a hydrothermal reaction and an oxidizing reaction in sequence to obtain the lamellar stacking titanium dioxide nanoparticles. Compared with the prior art, the preparation method provided by the invention is simple in processing steps, the novel two-dimensional material is taken as a template, and the lamellar stacking titanium dioxide nanoparticles are synthesized by a two-step method of the hydrothermal reaction and the oxidizing reaction; the reaction condition is mild, the process stability is good, raw materials are easily obtained, the cost is low, and the preparation method of the lamellar stacking titanium dioxide nanoparticles is conducive to realizing the expanded production, and has a very good application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano functional materials, and relates to a preparation method of layered stacked titanium dioxide nanoparticles. Background technique [0002] Titanium dioxide material has a stable structure, environmental friendliness, easy preparation and low price, and has a wide range of applications in photocatalysis, photolysis hydrogen production, dye-sensitized solar cells and lithium-ion batteries. However, in terms of lithium battery applications, its electrochemical performance has a great relationship with the particle size and microscopic morphology of titanium dioxide. The reduction of particle size can shorten the diffusion path of lithium ions, facilitate charge transport, and improve the performance of lithium batteries. Therefore, anatase titanium dioxide with nanostructures of different shapes is being studied as an emerging electrode material, such as titanium dioxide quantum dots, ti...

Claims

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Application Information

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IPC IPC(8): C01G23/053B82Y30/00
CPCC01G23/053C01P2002/72C01P2004/03C01P2004/64C01P2006/40
Inventor 唐煌包志豪
Owner TONGJI UNIV
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