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Method for preparing candied haw-shaped pure anatase type nano-titania wire in larger scale

A nano-titanium dioxide, anatase-type technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of not obtaining pure anatase-type titanium dioxide nanostructures and candied haws-shaped nanowires, etc. Achieve the effect of low production cost, good dispersion and parameter control

Active Publication Date: 2012-11-14
铜陵鑫隆钢结构有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many preparation methods have not obtained the ideal pure anatase titanium dioxide nanostructure, and in addition, the shape of the nanowires has not obtained the candied haws-like nanowires.

Method used

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  • Method for preparing candied haw-shaped pure anatase type nano-titania wire in larger scale
  • Method for preparing candied haw-shaped pure anatase type nano-titania wire in larger scale
  • Method for preparing candied haw-shaped pure anatase type nano-titania wire in larger scale

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Inject 30ml of 5M NaOH solution prepared in advance into a 50mL autoclave (lined with PTFE 316 stainless steel), and then add 0.2gTiO 2 Nanopowder ((P25, Degussa), ultrasonically made TiO 2 The powder is evenly dispersed, then sealed, and hydrothermally reacted in a furnace temperature of 160°C (constant temperature drying box) for 24 hours. After cooling, pour off the supernatant to obtain a white precipitate, which contains self-grown sodium titanate nanowires . Firstly, the white precipitate rich in sodium titanate nanowires is repeatedly washed with distilled water, dilute hydrochloric acid (pH=2), and distilled water until neutral to generate titanate nanowires. After being collected by filtration, they are calcined in a muffle furnace with a temperature gradient of 2-5°C / min, and heat-treated in a furnace at 650°C for 2 hours to obtain the required samples.

Embodiment 2

[0030] Inject 300ml of 15M NaOH solution prepared in advance into a 500mL autoclave (lined with PTFE 316 stainless steel), and then add 6gTiO 2 Nanopowder ((P25, Degussa), ultrasonically made TiO 2 The powder is evenly dispersed, then sealed, and hydrothermally reacted in a furnace temperature of 250°C (constant temperature drying box) for 7 days. After cooling, pour off the supernatant to obtain a white precipitate, which contains self-grown sodium titanate nanowires . Firstly, the white precipitate rich in sodium titanate nanowires is repeatedly washed with distilled water, dilute hydrochloric acid (pH=1), and distilled water until neutral to generate titanate nanowires. After being collected by filtration, it is calcined in a muffle furnace with a temperature gradient of 2-5°C / min, and heat-treated in a furnace at 800°C for 2 hours to obtain the desired sample.

[0031] Embodiment 1, 2 all can obtain specific surface area and be 35.2m 2 / g, candied haws-shaped nanowires ...

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Abstract

The invention relates to a method for preparing a candied haw-shaped pure anatase type nano-titania wire in a large scale, which is that a titanic acid nanowire is washed to be neutral, is put in a muffle to be heated at a heating rate of 2-5 DEG C / min, and is thermally insulated for 2-3 hours at the temperature of 650-800 DEG C, and accordingly, the required nano-titania wire is obtained. The method has a simple technology and is suitable for mass production; and the obtained nano-titania wire is of a candied haw shape, has good dispersity, larger slender proportion and large specific surface area, and is easy for settling separation, so the problems of separating and recovering titanium dioxide particles in the solution are solved.

Description

technical field [0001] The invention mainly relates to a mass preparation method of candied haws-shaped pure anatase nano-titanium dioxide wires. Background technique [0002] Since Fujishima and Honda discovered titanium dioxide photolysis of water in 1972, titanium dioxide has become a hotspot in material science research due to its broad application prospects in solar cells, photocatalysis, photolysis of water and sensor batteries. [0003] In recent years, one-dimensional titanium dioxide nanostructures (nanotubes, nanorods, nanowires) have become a research hotspot instead of titanium dioxide nanoparticles. The probability of recombination of holes and electrons is expected to improve the efficiency of photocatalysis, photolysis of water, and solar cells. At the same time, the one-dimensional titanium dioxide nanomaterial has the characteristics of easy separation and recovery in photolysis water compared with titanium dioxide particles. [0004] So far, a variety of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
Inventor 魏永
Owner 铜陵鑫隆钢结构有限公司
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