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Sonochemistry preparing method of nitrogen and rare earth element codope nanometer titania crystal

A nano-titanium dioxide, rare earth element technology, applied in the chemical/physical/physical chemical process of energy application, microsphere preparation, microcapsule preparation, etc., can solve the problems of high time consumption, inseparable from high temperature treatment, high energy consumption, etc. , to achieve the effect of simple process, narrow particle size distribution and small product particle size

Inactive Publication Date: 2013-06-05
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned methods have different operating conditions, but all require multi-step operations, and all of them are inseparable from high-temperature treatment, so they are time-consuming and energy-consuming.

Method used

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  • Sonochemistry preparing method of nitrogen and rare earth element codope nanometer titania crystal
  • Sonochemistry preparing method of nitrogen and rare earth element codope nanometer titania crystal
  • Sonochemistry preparing method of nitrogen and rare earth element codope nanometer titania crystal

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Dissolve 5ml tetraisopropyl titanate into 30ml deionized water / isopropanol (1:3, volume ratio) mixture to obtain solution A. 0.2 g urea, 0.3 g La (NO 3 ) 3 Dissolve in 20ml of deionized water / isopropanol (1:1, volume ratio) mixture to obtain solution B. Then the solution is slowly added dropwise to solution A, and at the same time, the titanium alloy probe of the ultrasonic generator is immersed in it for ultrasonic treatment. The ultrasonic frequency is 40KHz and the intensity is 60W / cm 2 , control the temperature of the reaction solution at 90°C, and the reaction time is 3h, then add 0.1g of polypyrrolidone dispersant, stir for 1h with magnetic force, then centrifuge, and the obtained precipitates are washed twice with deionized water and once with absolute ethanol, and finally vacuum-dried . The obtained product is short columnar, with a size of 10 / 16nm (W / L), narrow particle size distribution range, good monodispersity, and anatase crystal form.

Embodiment 2

[0031] Dissolve 5ml of tetrabutyl titanate into 30ml of deionized water / ethanol (1:3, volume ratio) mixture to obtain solution A. 0.2g urea, 0.3gCe(NO 3 ) 3 Dissolve in 20ml of deionized water / ethanol (1:1, volume ratio) mixture to obtain solution B. Then, while sonicating, solution B was slowly added dropwise into solution A. Ultrasonic frequency is 100KHz, intensity is 35 W / cm 2 , control the temperature of the reaction solution at 70°C, and the reaction time is 4 hours, then add 0.1g of polyethylene glycol (PEG) dispersant, stir it magnetically for 1 hour, then centrifuge, and the obtained precipitates are washed twice with deionized water and absolute ethanol Once, and finally vacuum dry. The obtained product is short columnar, with a size of 9 / 14nm (W / L), narrow particle size distribution range, good monodispersity, and anatase crystal form.

Embodiment 3

[0033] Dissolve 5ml of tetrapropyl titanate into 30ml of deionized water / propanol (1:3, volume ratio) mixture to obtain solution A. 0.2g (NH 4 ) 2 SO 4 , 0.3gNd(NO 3 ) 3 Dissolve in 20ml of deionized water / isopropanol (1:1, volume ratio) mixture to obtain solution B. Then solution B was slowly added dropwise to solution A while ultrasonic treatment was performed. Ultrasonic frequency is 20KHz, intensity is 40W / cm 2 , control the temperature of the reaction solution at 80°C, and the reaction time is 4h, then add 0.1g of polypyrrolidone dispersant, stir it with magnetic force for 1h, then centrifuge, and the obtained precipitates are washed twice with deionized water and once with absolute ethanol, and finally vacuum-dried . The obtained product is short columnar, with a size of 12 / 19nm (W / L), narrow particle size distribution range, good monodispersity, and anatase crystal form.

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Abstract

The invention belongs to the preparing field of nanometer titania crystal, particularly relates to a sonochemistry preparing method of nitrogen and rare earth element codope nanometer titania crystal. The sonochemistry preparing method is characterized in that titanate or titanium, nitrogen sources and nitrate having rare earth primary color serve as raw material, after mixture is even, under normal pressure of 70-90 DEG C, dispersing agents are added to the raw materials, and ultrasonic treatment is conducted for 3-4 hours to obtain white precipitate. The precipitate is separated in a centrifuged mode, washed and dried in a vacuum mode, and products having special crystal form structures are obtained. The sonochemistry preparing method is simple in operation step, reasonable in design, low in reaction temperature, and simple in process, produced nanometer titania has the advantages of being small in product grain diameter and narrow in grain diameter distribution range, and the sonochemistry preparing method is suitable for being popularized and applied widely.

Description

(1) Technical field [0001] The invention belongs to the field of preparation of titanium dioxide nano crystals, in particular to a sonochemical preparation method of nitrogen and rare earth element co-doped nano titanium dioxide crystals. (2) Background technology [0002] Nano-TiO 2 As a photocatalyst with excellent performance, it can degrade various organic pollutants in water and air, and at the same time, it also has the function of sterilization and disinfection, and because it is non-toxic and pollution-free, it has a good application prospect in environmental purification. But TiO 2 Only under the action of ultraviolet light with a wavelength less than 387nm can electron-hole pairs be generated, and then converted into active species such as hydroxyl radicals to degrade pollutants; while the energy of the ultraviolet band in sunlight only accounts for 5% of the total solar energy. %, most of the energy of visible light (about 45%) has not been fully utilized. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J19/10
Inventor 王西奎王晨国伟林
Owner QILU UNIV OF TECH
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