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Method for preparing Nano line of titania, and application of the prepared Nano line of titania

A titanium dioxide and nanowire technology, applied in the direction of titanium oxide/hydroxide, titanium dioxide, nanostructure manufacturing, etc., to achieve wide application prospects, low production cost, and good powder crystallinity.

Inactive Publication Date: 2007-02-21
BEIJING XIANXUNDONGTAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for preparing Nano line of titania, and application of the prepared Nano line of titania
  • Method for preparing Nano line of titania, and application of the prepared Nano line of titania
  • Method for preparing Nano line of titania, and application of the prepared Nano line of titania

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Disperse 1g of titanium oxide (Deguass P25) in 40mL of 5M sodium hydroxide solution, transfer the solution to a hydrothermal kettle, heat to 250°C, and keep the temperature constant for 48 hours. When the temperature of the reaction kettle drops to room temperature, take out the hydrothermal kettle , until the supernatant was dropped, the white solid at the bottom was transferred to a beaker, ultrasonically dispersed, washed with deionized water several times, and centrifuged until the pH of the washing liquid reached 9-11. Add 0.1M nitric acid solution until the solution becomes acidic, sonicate and let it stand for more than 6 hours, so that the H + The ions can convert the Na in the nanowire + The ions are fully exchanged out. Wash with deionized water several times, centrifuge until the pH of the washing solution is close to neutral, and dry at 80°C. Disperse 1-1.5g of titanic acid nanowires into 80mL of the above nitric acid solution with pH=7, transfer the solut...

Embodiment 2

[0048] Disperse 2g of metatitanic acid in 80mL of 10M sodium hydroxide solution, transfer the solution to a hydrothermal kettle, heat to 180°C, and keep the temperature constant for 10 hours. The supernatant and the white solid at the bottom were transferred to a beaker, ultrasonically dispersed, washed with deionized water several times, and centrifuged until the pH of the washing liquid reached 9-11. Add 0.1M hydrochloric acid solution until the solution becomes acidic, sonicate and let it stand for more than 6 hours, so that the H + The ions can convert the Na in the nanowire + The ions are fully exchanged out. Wash with deionized water several times, centrifuge until the pH of the washing solution is close to neutral, and dry under vacuum at 60°C. Disperse 1-1.5g of titanic acid nanowires into 80mL of the above nitric acid solution with pH=2, transfer the solution to a hydrothermal kettle, raise the temperature to 250°C, and keep the temperature constant for 1 hour. was...

Embodiment 3

[0050] Comparative experiment: repeat the embodiment 2 of CN 1613585A

[0051] Put 25kg of metatitanic acid powder into the reaction kettle, add 10M NaOH aqueous solution, mix and stir evenly, heat to 160°C and keep at this temperature for 24h; when the reaction kettle is lowered to room temperature, open the reaction kettle to take out the product, and carry out Filter and wash with 0.1M dilute nitric acid, wash in water, and dry. Obtain the x-ray diffraction pattern (XRD) of product as Figure 6 As shown, it can be directly drawn from the spectrum that the product of this example is titanic acid.

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Abstract

This invention relates to a method for preparing titanium dioxide nanowires. The method uses titanium dioxide powder as the raw material, and performing hydrothermal reaction to obtain titanium dioxide nanowires. The obtained titanium dioxide nanowires have high activity in photodegradation of organic pollutants and can be recovered easily for recycling.

Description

technical field [0001] The invention mainly relates to a method for preparing titanium dioxide nanowires and the application of the titanium dioxide nanowires in the degradation of organic pollutants. Background technique [0002] Since Fujishima and Honda discovered that titanium dioxide electrodes can be used to photolyze water in 1972, titanium dioxide has become a research hotspot in the field of materials due to its broad application prospects in solar cells, photocatalysis, photolysis of water and sensor batteries. [0003] In recent years, one-dimensional titania nanostructures (nanowires, rods, and tubes) have become the focus of research instead of titania nanoparticles, because photogenerated carriers can migrate long distances in the axial direction of one-dimensional nanostructures, reducing the space The probability of recombination of holes and electrons is expected to improve the efficiency of its application in photocatalysis, photolysis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82B3/00B01J21/06C02F1/30
CPCC02F1/725C01G23/053C01P2004/16C01P2002/72C02F2101/30B01J35/004B01J21/063C02F1/30B82Y30/00Y02W10/37B01J35/39
Inventor 徐东升余宇翔
Owner BEIJING XIANXUNDONGTAI TECH
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