Titanium dioxide hollow sphere constructed by nanorods and preparation method and application thereof

A technology of titanium dioxide and nanorods, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as limited applications, and achieve the effects of storage and penetration, good structural stability, and large output

Inactive Publication Date: 2017-03-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bandgap of titanium dioxide is relatively wide, and it only responds in the ultraviolet band. At the same time, photogenerated electrons and holes are prone to recombination, which limits its application in the fields of photolysis of water for hydrogen production, dye-sensitized solar cells, etc.

Method used

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  • Titanium dioxide hollow sphere constructed by nanorods and preparation method and application thereof
  • Titanium dioxide hollow sphere constructed by nanorods and preparation method and application thereof
  • Titanium dioxide hollow sphere constructed by nanorods and preparation method and application thereof

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Effect test

Embodiment 1

[0038] Add 1.5 mL of titanium tetrachloride to 84 mL of isopropanol and stir for 30 minutes. The above solution was transferred to a 150mL reactor and reacted at 200°C for 24 hours. Then, the obtained product is repeatedly washed with ethanol, centrifuged and dried to obtain titanium dioxide hollow spheres constructed of nanorods. Titanium dioxide hollow spheres have a diameter of 1.5 μm, a shell thickness of 400-500 nm, a cavity size of about 500 nm, and a specific surface area of ​​43.8 m 2 g -1 . In addition, the shell consists of a large number of radial nanorods with a nanorod size of ~15 nm. The hollow structure titanium dioxide crystal form is anatase phase.

[0039] figure 1 It is the scanning electron microscope picture of the core-shell structure titanium dioxide constructed by nanosheets, figure 2 is the TEM image of the material, image 3 is the XRD pattern of the material, Figure 4 is the nitrogen adsorption-desorption curve of the material, the specific...

Embodiment 2

[0042] Add 1.5 mL of titanium tetrachloride to 84 mL of isopropanol and stir for 30 minutes. The above solution was transferred to a 150mL reactor and reacted at 200°C for 3 hours. Then, the obtained product is repeatedly washed with ethanol, centrifuged and dried to obtain titanium dioxide hollow spheres constructed of nanorods. Figure 6 It is the scanning electron micrograph of embodiment 2. The diameter of the titanium dioxide core-shell structure is about 4 μm, the thickness of the shell layer is 1 μm, and the diameter of the core part is about 1.8 μm. In addition, the shell consists of a large number of radiating nanorods with a nanorod size of ~15 nm.

Embodiment 3

[0044] Add 1.5 mL of titanium tetrachloride to 84 mL of isopropanol and stir for 30 minutes. The above solution was transferred to a 150mL reactor and reacted at 200°C for 9 hours. Then, the obtained product is repeatedly washed with ethanol, centrifuged and dried to obtain titanium dioxide hollow spheres constructed of nanorods. Figure 7 It is the scanning electron micrograph of embodiment 3. The diameter of the titanium dioxide hollow sphere is about 2 μm. In addition, the shell consists of a large number of radiating nanorods with a nanorod size of ~15 nm.

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Abstract

The invention discloses a nanorod-constructed titanium dioxide hollow sphere with ultra-high stability, and excellent charge and discharge capacity and rate capability, and a preparation method thereof. The method is as below: employing a solvent thermal method by dissolving a titanium source in isopropanol and stirring uniformly to obtain a mixed solution; and transferring the above solution to a reactor with a teflon lining, placing the reactor in an oven at 100-220 DEG C, insulating for 1.5-48 h, cooling to room temperature, washing the product by ethanol, centrifuging, and drying to obtain the nanorod-constructed titanium dioxide hollow sphere. The invention employs the solvent thermal method to realize one step method for synthesis of the nanorod-constructed titanium dioxide hollow sphere. The titanium dioxide hollow sphere can be applied to lithium ion battery cathode material. At the same time, the special nanorod grade hollow structure as a photocatalyst can regulate the of absorption and usage of light, and improve photocatalytic activity; and the nanorod-constructed titanium dioxide hollow sphere has broad application prospects in the fields of photocatalysis, photocatalytic water splitting and dye-sensitized solar cell.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, and in particular relates to a titanium dioxide hollow sphere constructed of nanorods and a preparation method and application thereof. Background technique [0002] In recent years, modern society is facing increasingly serious energy and environmental problems, and people's demand and application of renewable energy are becoming increasingly urgent. As a new energy conversion and storage device, lithium-ion batteries have the advantages of high open circuit voltage, high energy density, long service life, and low pollution. The development of new electrode materials is a key factor in the development of a new generation of lithium-ion batteries. Titanium dioxide has a stable structure, chemical properties, safety, and abundant reserves. It can be used as an anode material to achieve rapid and low-voltage lithium insertion. However, the lithium storage performance of titanium ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06C01G23/053B82Y30/00B82Y40/00
Inventor 李昱金俊黄绍专刘婧王超彭昊阳王洪恩吴旻陈丽华苏宝连
Owner WUHAN UNIV OF TECH
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