Method for synthesizing mesoporous titanium dioxide by adding template agent through ultrasonic coupling and microwave

A technology of mesoporous titanium dioxide and templating agent, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as affecting the application of photocatalytic purification technology, easy to agglomerate particles, difficult to obtain particle size and other problems , to achieve the effect of reducing particle agglomeration, small particle size and good dispersibility

Pending Publication Date: 2020-11-17
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the photocatalytic performance is improved, TiO 2 Particles are prone to agglomeration, and it is difficult to obtain TiO with small particle size, uniform shape and good dispersion 2 , the surface of the prepared titanium dioxide particles has uneven mesopores, which affects its application in photocatalytic purification technology

Method used

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  • Method for synthesizing mesoporous titanium dioxide by adding template agent through ultrasonic coupling and microwave
  • Method for synthesizing mesoporous titanium dioxide by adding template agent through ultrasonic coupling and microwave
  • Method for synthesizing mesoporous titanium dioxide by adding template agent through ultrasonic coupling and microwave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First configure a sodium hydroxide solution with a volume of 80mL and a concentration of 0.09g / L, then configure a mixture of 15.4ml of tetrabutyl titanate, 0.1g of template agent CTAB and 35mL of absolute ethanol. 600rpm, reaction temperature 60℃, ultrasonic power density 0.231W / cm 2 , the ultrasonic operation mode is intermittent operation and the ultrasonic operation cycle is ultrasonic 10s stop 20s, the mixed solution is dripped into the 0.09g / L sodium hydroxide solution at a rate of 100rpm with a peristaltic pump, and at the same time, start timing with a stopwatch, After the dropwise addition is completed, turn off the ultrasonic generator, record the time spent in ultrasonication for 15 minutes, and use deionized water to make up the volume of the obtained precursor to 200mL, stir evenly, and finally transfer the volume-fixed precursor to the microwave reaction device , under the conditions of microwave power density of 1.5W / mL, microwave temperature of 120°C and...

Embodiment 2

[0027]First configure a sodium hydroxide solution with a volume of 80mL and a concentration of 0.09g / L, and then configure a mixed solution of 15.4ml tetrabutyl titanate, 0.2g template agent CTAB and 35mL absolute ethanol. 600rpm, reaction temperature 60℃, ultrasonic power density 0.231W / cm 2 , the ultrasonic operation mode is intermittent operation and the ultrasonic operation cycle is ultrasonic 10s stop 20s, the mixed solution is dripped into the 0.09g / L sodium hydroxide solution at a rate of 100rpm with a peristaltic pump, and at the same time, start timing with a stopwatch, After the dropwise addition is completed, turn off the ultrasonic generator, record the time spent in ultrasonication for 15 minutes, and use deionized water to make up the volume of the obtained precursor to 200mL, stir evenly, and finally transfer the volume-fixed precursor to the microwave reaction device , under the conditions of microwave power density of 1.5W / mL, microwave temperature of 120°C an...

Embodiment 3

[0030] First prepare a sodium hydroxide solution with a volume of 80mL and a concentration of 0.09g / L, and then prepare a mixture of 15.4ml of tetrabutyl titanate and 35mL of absolute ethanol. The magnetic stirrer rotates at 600rpm and the reaction temperature is 60°C. , the ultrasonic power density is 0.231W / cm 2 , the ultrasonic operation mode is intermittent operation and the ultrasonic operation cycle is ultrasonic 10s stop 20s, the mixed solution is dripped into the 0.09g / L sodium hydroxide solution at a rate of 100rpm with a peristaltic pump, and at the same time, start timing with a stopwatch, After the dropwise addition is completed, turn off the ultrasonic generator, record the time spent in ultrasonication for 15 minutes, and use deionized water to make up the volume of the obtained precursor to 200mL, stir evenly, and finally transfer the volume-fixed precursor to the microwave reaction device , under the conditions of microwave power density of 1.5W / mL, microwave t...

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Abstract

The invention relates to a method for synthesizing mesoporous titanium dioxide by adding a template agent through ultrasonic coupling microwaves. The method is characterized in that the template agentis added, so that the mesoporous size is reduced and the product dispersity is improved under the ultrasonic action. And the dispersity of titanium dioxide is maintained through microwave heating. The prepared particles are small in size and good in dispersity and have an ordered and controllable mesoporous structure, and the photocatalytic performance of the particles is improved. The method comprises the following steps: preparing a 0.045-0.18 g / L NaOH solution, preparing a mixed solution of a certain amount of tetrabutyl titanate, 0.1 g of a template agent and a certain amount of absoluteethyl alcohol, dripping the mixed solution into the NaOH solution under the conditions that the reaction temperature is 20 DEG C-80 DEG C, the ultrasonic power density is 0.077 W / mL-0. 385W / mL, the ultrasonic operation mode is intermittent operation, the operation period is 5-20 seconds of ultrasonic operation and 25-10 seconds of no ultrasonic operation, and the time for the ultrasonic operationis 7-30 minutes; and after dropping, transferring the obtained precursor into a microwave reactor, conducting reacting under the conditions that the microwave power density is 1 W / mL- 2.5 W / mL and themicrowave temperature and time are certain, and obtaining the mesoporous titanium dioxide after the reaction.

Description

technical field [0001] The invention relates to a method for synthesizing mesoporous titanium dioxide under the condition of adding a template agent through a method for coupling microwave physical fields with ultrasonic waves, and belongs to the technical field of preparing photocatalysts. Background technique [0002] TiO 2 Photocatalytic materials have the advantages of being non-toxic, cheap, chemically inert, and not prone to light and chemical corrosion, and have been widely used in the fields of environment and energy. Since the photocatalytic reaction is in the TiO 2 photocatalyst surface, so the TiO 2 The surface morphology, particle size, structure and number of surface active sites of photocatalysts have certain requirements. by TiO 2 It is an effective method to improve the catalytic performance of photocatalysts by adjusting the morphology and structure of photocatalysts. Nowadays, in order to prepare more efficient TiO 2 As a photocatalyst, TiO with vario...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J19/10B01J19/12B01J21/06B01J35/10B01J37/34
CPCB01J19/10B01J19/126B01J21/063B01J35/004B01J35/10B01J37/343B01J37/346C01G23/053
Inventor 郭志超李济王丽霞
Owner TIANJIN UNIV OF SCI & TECH
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