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Layered-structure anatase titanium-oxide hollow hexagonal nanosheet and preparation method thereof

A layered structure, nanosheet technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high energy consumption, complex reaction, difficult control, etc., and achieve the effect of simple reaction process, easy control and novel structure

Active Publication Date: 2011-01-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the existing hollow structures are spherical structures, and the synthesis methods are mostly hydrothermal method and sol-gel template method, which consume a lot of energy, have complex reactions, and are difficult to control

Method used

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  • Layered-structure anatase titanium-oxide hollow hexagonal nanosheet and preparation method thereof
  • Layered-structure anatase titanium-oxide hollow hexagonal nanosheet and preparation method thereof
  • Layered-structure anatase titanium-oxide hollow hexagonal nanosheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 Preparation of hollow hexagonal titanium oxide nanosheets with single-layer structure

[0017] Dissolve 1.48 g of ammonium fluotitanate and 1.24 g of boric acid in 100 ml of deionized water, and magnetically stir until the solution is clear. Disperse 0.23 g of cadmium hydroxide in 10 ml of deionized water, ultrasonically disperse for 10 minutes, add the above-mentioned ammonium fluotitanate / boric acid aqueous solution dropwise to the above-mentioned dispersion solution of cadmium hydroxide nanosheets, and stir magnetically for 120 minutes. The white precipitate was washed with deionized water, dried at 80°C, and sintered at 450°C for 30 minutes to obtain hollow hexagonal titanium oxide nanosheets with a single-layer structure.

Embodiment 2

[0018] Example 2 Preparation of hollow hexagonal titanium oxide nanosheets with single-layer structure

[0019] Other processes are the same as in Example 1. However, the ratio of ammonium fluorotitanate and boric acid was adjusted as follows: 1.48 g of ammonium fluorotitanate and 1.73 g of boric acid were dissolved in 100 ml of deionized water. Hollow hexagonal titanium oxide nanosheets with a single-layer hollow structure were obtained.

Embodiment 3

[0020] Example 3 Preparation of hollow hexagonal titanium oxide nanosheets with double-layer structure

[0021] Dissolve 0.98 g of ammonium fluotitanate and 1.22 g of boric acid in 50 ml of deionized water, and magnetically stir until the solution is clear. Disperse 0.11 g of cadmium hydroxide in 5 ml of deionized water and ultrasonically disperse for 10 minutes. Add the above-mentioned ammonium fluorotitanate / boric acid aqueous solution dropwise to the above-mentioned dispersion solution of cadmium hydroxide nanosheets, stir magnetically for 120 minutes, let stand for 12 hours, wash the white precipitate with deionized water, dry it at 80°C, and heat it at 500°C After sintering for 30 minutes, hollow hexagonal titanium oxide nanosheets with double-layer structure were obtained.

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Abstract

The invention relates to a layered-structure anatase titanium-oxide hollow hexagonal nanosheet and a preparation method thereof. The titanium oxide is assembled from 2-10 nm anatase nanoparticles and forms a multilayer hollow hexagonal nanosheet structure, the diameter of the cavity is 150-400 nm, and the wall thickness of a single layer is 10-30 nm. The preparation method comprises the following steps: using a hexagonal cadmium hydroxide nanosheet as a template, dispersing the hexagonal cadmium hydroxide nanosheet in a water solution, dropwise adding ammonium fluorotitanate and boric acid water solution in a certain proportion, stirring, standing, precipitating, and carrying out centrifugal washing to obtain a single-layer hollow-structure hexagonal titanium oxide nanosheet. A multilayer-structure hollow titanium oxide nanosheet can be obtained by repeating the operations above. The preparation method has the advantages of simple reaction process and easy control. The titanium oxide has a novel structure, and has wide application prospects in the fields of photocatalysis, catalyst carriers, thermal insulation, sound insulation, electric insulation, optical hydrolysis hydrogen production, dye-sensitized solar cells and the like.

Description

technical field [0001] The invention relates to an anatase phase titanium oxide hollow hexagonal nanosheet with a layered structure and a preparation method thereof. Background technique [0002] The chemical, optical and electrical properties of nano-semiconductor oxides mainly depend on the morphology and size of crystals. The development of nanocrystals with special morphology and three-dimensional structure will give them better functional application prospects. [0003] As a semiconductor material with a wide bandgap, titanium oxide has the advantages of good stability, strong oxidation ability, and not easy to be corroded by light. It is widely used as an energy conversion material in modern scientific and technological research, especially light energy, chemical energy, and electrical energy. conversion between. The disadvantages of nano-titanium oxide are insufficient light utilization and low carrier separation efficiency. Therefore, titanium oxide nanocrystals w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C01G23/053
Inventor 李春忠顾锋邵玮
Owner EAST CHINA UNIV OF SCI & TECH
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