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Solvent thermal synthesis method of TiO2 core-shell structure submicron ball

A synthesis method, sub-micron technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc.

Active Publication Date: 2015-08-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Isopropanol and acetylacetone are common reagents, but the synthesis of TiO2 micro-nano materials using isopropanol and acetylacetone as solvents has not been reported yet.

Method used

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  • Solvent thermal synthesis method of TiO2 core-shell structure submicron ball
  • Solvent thermal synthesis method of TiO2 core-shell structure submicron ball

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Experimental program
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Effect test

Embodiment 1

[0022] Mix acetylacetone and isopropanol at a volume ratio of 1:4 to form a mixed solvent. After stirring evenly, add 2ml of tetra-n-butyl titanate (TBT), then fully stir and transfer the mixed solution to a reaction kettle, and react at 200°C 6 hours. After natural cooling, TiO was obtained by centrifugation, washing and drying. 2 Core-shell microspheres ( figure 1 ), the diameter of the microspheres is ~1200 nm.

Embodiment 2

[0024] Mix acetylacetone and isopropanol at a volume ratio of 1:4 to form a mixed solvent. After stirring evenly, add 2ml of tetra-n-butyl titanate (TBT), then fully stir and transfer the mixed solution to a reaction kettle, and react at 200°C 12 hours. After natural cooling, TiO was obtained by centrifugation, washing and drying. 2 Core-shell microspheres ( figure 2 ), the diameter of the microspheres is ~1400 nm.

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Abstract

The invention discloses a solvent thermal synthesis method of a TiO2 core-shell structure submicron ball. The solvent thermal synthesis method comprises the following steps: mixing acetylacetone and isopropanol to form a mixed solvent; adding tetrabutyl titanate or tetraisopropyl titanate; sufficiently stirring and reacting in a reaction kettle at 160-230 DEG C for 6-24 hours; and after naturally cooling, separating, washing and drying to obtain the TiO2 core-shell structure submicron ball. The synthesis method has the advantages of moderate reaction conditions, simple method, uniform grain diameter and adjustable size, and high yield. The TiO2 core-shell structure submicron ball synthesized by the method has a wide application prospect in the fields of novel solar batteries, photocatalysis, lithium ion batteries and the like.

Description

technical field [0001] The invention belongs to the preparation of inorganic nanomaterials, in particular to TiO 2 Solvothermal synthesis of core-shell structured submicron spheres. Background technique [0002] In recent years, nanomaterials have developed rapidly. Due to the characteristics of nanoparticles such as surface effects, quantum effects, small size effects, and macroscopic quantum tunneling effects, they exhibit significant differences from general macroscopic materials in terms of electricity, optics, mechanics, and magnetism. feature. [0003] Titanium dioxide is widely used in photocatalysis, solar cells, lithium-ion batteries and other fields due to its advantages of non-toxicity, rich content, stability and photoactivity. There are four main crystal forms of titanium dioxide: anatase, rutile, brookite and metastable TiO 2 (B) phase. The rutile type is more stable and dense than the anatase type, and has higher hardness, density, dielectric constant and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 胡林华李兆乾莫立娥戴松元
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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