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Preparation method for metallic oxide spherical cascade structure

A cascade structure, oxide technology, applied in oxide/hydroxide preparation, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve low pollution environment, time-consuming output, hydrothermal, hydrolysis The method and steps are complicated, and the equipment requirements are not high, the time required is short, and the cost is low.

Inactive Publication Date: 2013-09-04
NANJING UNIV
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Problems solved by technology

[0003] At present, the metal oxide spherical cascade structure is mainly a large nanoscale / microscale sphere composed of some nanoparticles, and its main preparation methods mainly include hydrothermal synthesis, hydrolysis, vacuum evaporation, or atomic beam deposition. However, hydrothermal 1. The steps of the hydrolysis method are complicated, time-consuming and the output is low, polluting the environment, the cost of the atomic beam deposition method is relatively high, and the above-mentioned methods are difficult to better control the size of the spherical cascade structure

Method used

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  • Preparation method for metallic oxide spherical cascade structure
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Effect test

Embodiment 1

[0017] Mix titanium dioxide powder with a particle size of about 25 nanometers and polyethylene glycol with a molecular weight of 20,000 according to a mass ratio of 3:1 by ball milling to obtain a mixed powder of titanium dioxide and polyethylene glycol; use water as a solvent to prepare slurry material, after stirring evenly, use the coating method to coat the substrate; remove the organic matter through the sintering process to obtain a titanium dioxide spherical cascaded film, see figure 1 (a).

Embodiment 2

[0019] Mix titanium dioxide powder with a particle size of about 25 nanometers and polyethylene glycol with a molecular weight of 10,000 according to a mass ratio of 3:1 by ball milling to obtain a mixed powder of titanium dioxide and polyethylene glycol; use ethanol as a solvent to prepare slurry After stirring evenly, it is coated on the substrate to form a block; the organic matter is removed through the sintering process to obtain a block of titanium dioxide spherical cascade structure, see figure 1 (b).

Embodiment 3

[0021] Mix titanium dioxide powder with a particle size of about 25 nanometers and polyethylene glycol with a molecular weight of 4000 according to a mass ratio of 3:1 by ball milling to obtain a mixed powder of titanium dioxide and polyethylene glycol; use water as a solvent to prepare slurry material, after stirring evenly, the method of spin coating is used to form a film on the substrate; the organic matter is removed by sintering process, and a titanium dioxide spherical cascade structure film is obtained, see figure 1 (c).

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Abstract

The invention discloses a preparation method for a metallic oxide spherical cascade structure, and belongs to the nano / micron microstructural materials and preparative techniques thereof. The metallic oxide spherical cascade structure refers to a micron-scale spheroidal particle structure formed by metallic oxide powder with a particle size of dozens of nanometers. The preparation method comprises the steps that the metallic oxide powder is mixed uniformly with polyethylene glycol through a ball-milling method, and metallic oxide and polyethylene glycol mixed powder is obtained; slurry is prepared with the powder, stirred uniformly, and dried on a substrate to obtain a film or a bulk; and organic matters are removed through calcination, and a film or a bulk with the metallic oxide spherical cascade structure. The preparation method has the characteristics of capacity of preparing the metallic oxide spherical cascade structure, homogeneous ball particle size, various types of applicable oxide particles, low cost, easiness in operation, no pollution, high output, no requirement for complex equipment and device, capacity of fast production in batch, and the like.

Description

technical field [0001] The invention relates to a method for preparing a metal oxide micro-nano-sized spherical cascaded structure, which belongs to nano / micro microstructure materials and the preparation technology thereof. Background technique [0002] The preparation of metal oxide spherical cascade structure is a technology with important application background. For example, the spherical cascade structure of titanium dioxide has better photocatalytic performance and ultraviolet absorption ability, and is widely used in air purification, sewage treatment, self-cleaning glass, nano-environmental protection coatings, functional textiles, plastics, ceramics and thin-film solar cells. It plays an important role in environmental purification and pollution control. The surface microstructure of the metal oxide spherical cascade structure also has important scientific research value and application prospects. For example, spherical titanium dioxide has a large specific surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14C01G19/02C01G49/06C01G23/047C01F7/02B82Y30/00B82Y40/00C01F7/021
CPCC01G19/02C01G23/047B82Y30/00B82Y40/00C01F7/021C01G49/06C01B33/12C01F7/02
Inventor 王超祝名伟刘治陈延峰
Owner NANJING UNIV
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