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TiO2 hollow spheres and preparation method thereof

A technology of hollow balls and core-shell balls is applied in the field of TiO2 hollow balls and their preparation, which can solve the problems of low utilization rate of solar energy and the like, and achieve the effect of simple and easy method.

Inactive Publication Date: 2019-08-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiO 2 Photocatalytic materials can only absorb ultraviolet light, and the utilization rate of solar energy is low

Method used

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  • TiO2 hollow spheres and preparation method thereof
  • TiO2 hollow spheres and preparation method thereof
  • TiO2 hollow spheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of TiO 2 The preparation method of hollow sphere comprises the following steps:

[0032] 1) Mix ethylene glycol and acetone at a mass ratio of 2:1 to obtain solution A;

[0033] 2) Add mesoporous carbon spheres with a particle size of 229nm into solution A, and ultrasonically disperse them uniformly to obtain suspension B;

[0034] 3) Add tetrabutyl titanate to suspension B, the mass ratio of tetrabutyl titanate to mesoporous carbon spheres is 5:1, and obtain suspension C after ultrasonic dispersion;

[0035] 4) Transfer the suspension C to a magnetically stirred high-pressure reactor with a filling degree of 50% and a magnetic stirring speed of 300r / min, and react at 150°C for 12 hours to obtain the solvothermal product D;

[0036] 5) The solvothermal product D was centrifuged, washed with deionized water and ethanol, dried at 80°C for 12 hours, and ground to obtain mesoporous carbon @TiO 2 Nucleus shell ball.

[0037] 6) Integrating mesoporous carbon @TiO ...

Embodiment 2

[0039] A kind of TiO 2 The preparation method of hollow sphere comprises the following steps:

[0040] 1) Mix ethylene glycol and acetone at a mass ratio of 2:1 to obtain solution A;

[0041] 2) Add mesoporous carbon spheres with a particle size of 229nm into solution A, and ultrasonically disperse them uniformly to obtain suspension B;

[0042] 3) Add tetrabutyl titanate to suspension B, the mass ratio of tetrabutyl titanate to mesoporous carbon spheres is 5:1, and obtain suspension C after ultrasonic dispersion;

[0043] 4) Transfer the suspension C to a magnetically stirred high-pressure reactor with a filling degree of 50% and a magnetic stirring speed of 350r / min, and react at 160°C for 14 hours to obtain the solvothermal product D;

[0044] 5) The solvothermal product D was centrifuged, washed with deionized water and ethanol, dried at 80°C for 12 hours, and ground to obtain mesoporous carbon @TiO 2 Nucleus shell ball.

[0045] 6) Integrating mesoporous carbon @TiO ...

Embodiment 3

[0047] A kind of TiO 2 The preparation method of hollow sphere comprises the following steps:

[0048] 1) Mix ethylene glycol and acetone at a mass ratio of 3:1 to obtain solution A;

[0049] 2) Add mesoporous carbon spheres with a particle size of 306nm into solution A, and ultrasonically disperse them uniformly to obtain suspension B;

[0050] 3) Add tetrabutyl titanate to suspension B, the mass ratio of tetrabutyl titanate to mesoporous carbon spheres is 5:1, and obtain suspension C after ultrasonic dispersion;

[0051]4) Transfer the suspension C to a magnetically stirred high-pressure reactor with a filling degree of 80% and a magnetic stirring speed of 400r / min, and react at 180°C for 18 hours to obtain the solvothermal product D;

[0052] 5) The solvothermal product D was centrifuged, washed with deionized water and ethanol, dried at 90°C for 20 hours, and ground to obtain mesoporous carbon @TiO 2 Nucleus shell ball.

[0053] 6) Integrating mesoporous carbon @TiO 2...

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Abstract

The invention discloses a preparation method of TiO2 hollow spheres. The preparation method comprises the following steps: (1) dissolving ethylene glycol into acetone to obtain a solution A; (2) adding particle size controllable mesoporous carbon spheres into the solution A, and carrying out uniform ultrasonic dispersion to obtain a suspension B; (3) adding tetrabutyl titanate into the suspensionB, and carrying out uniform ultrasonic dispersion to obtain a suspension C; (4) transferring the suspension C into a magnetically stirred hydrothermal reactor, and subjecting a reactant to a solvothermal reaction under magnetic stirring to generate a solvothermal product D; (5) carrying out centrifugal separation, washing, drying and grinding on the solvothermal product D to obtain mesoporous carbon @ TiO2 core-shell spheres; and (6) roasting the mesoporous carbon @ TiO2 core-shell spheres at an air atmosphere to obtain the TiO2 hollow spheres. The TiO2 hollow spheres with different cavity sizes and thicknesses are prepared by changing the kind and proportion of the reactant and regulating the cavity sizes and thicknesses of the TiO2 hollow spheres, the method is simple and easy, and the product has relatively strong light absorption capacity and catalytic effect.

Description

technical field [0001] The invention relates to the field of hollow material synthesis, in particular to a TiO 2 Hollow sphere and its preparation method. Background technique [0002] TiO 2 Photocatalytic materials are widely used in photocatalytic hydrogen production, CO 2 Reduction and pollutant degradation field. However, TiO 2 Photocatalytic materials can only absorb ultraviolet light, and the utilization rate of solar energy is low. In order to improve the TiO 2 The solar photocatalytic efficiency of photocatalytic materials can be broadened by means of doping, constructing heterojunctions and forming surface defects on the one hand. 2 The photocatalytic material absorbs sunlight in the range and uses visible light to carry out photocatalytic reactions. On the other hand, TiO can be improved by structural design 2 The ability of photocatalytic materials to absorb ultraviolet light. [0003] As we all know, chloroplasts in plant leaves contain a large number of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J37/34B01J37/10B01J35/10B01J37/08C01G23/053
CPCB01J21/063B01J37/343B01J37/10B01J37/0018B01J37/082B01J37/0036C01G23/053C01P2004/34B01J35/61B01J35/39
Inventor 杨艳玲陈华军和茹梅孙瑜毕雅欣邹鑫鑫侯小江叶晓慧陈志刚朱建锋冯雷张荔锁国权
Owner SHAANXI UNIV OF SCI & TECH
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