Nonmetal co-doped thorn-shaped inlaid TiO2 hollow structures as well as preparation method and application thereof

A hollow structure, non-metallic technology, applied in chemical instruments and methods, chemical/physical/physicochemical processes using energy, water treatment of special compounds, etc., can solve problems such as hollow structure methods that have not been reported in the literature, and achieve the process Simple, time-shortening effect

Active Publication Date: 2019-03-08
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, non-metallic co-doped spiny mosaic TiO is prepared by ultrasonic and microwave synergistic one-step reaction method. 2 The method of hollow structure has not been reported in the literature

Method used

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  • Nonmetal co-doped thorn-shaped inlaid TiO2 hollow structures as well as preparation method and application thereof
  • Nonmetal co-doped thorn-shaped inlaid TiO2 hollow structures as well as preparation method and application thereof
  • Nonmetal co-doped thorn-shaped inlaid TiO2 hollow structures as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1: A spiny mosaic TiO doped with nitrogen and sulfur elements 2 Hollow spheres are prepared by the following method:

[0063]In the ultrasonic and microwave integrated device, the ultrasonic power of the ultrasonic nebulizer 3 is set to 100W, and the spray volume is 0.7L / h, and then 1g of titanium difluoride, 30mL of absolute ethanol and 0.1g of methionine are added to the ultrasonic nebulizer 3, Under the pre-set conditions, the solution was stirred evenly with the ultrasonic nebulizer 3 and dispersed into a uniform mist 8, and the mist 8 was slowly transported to the ultrasonic microwave under the action of nitrogen in the nitrogen bottle (flow rate: 50mL / min). Reactor 7 carries out the reaction, the ultrasonic microwave temperature of ultrasonic microwave reactor 7 is 300°C, the ultrasonic microwave time is 3h, and the ultrasonic microwave power is 200W. The filter screen 9 enters the microwave dryer 11, and after being treated by the microwave dryer 11 at a...

Embodiment 2

[0064] Example 2: A spiny mosaic TiO doped with nitrogen and sulfur elements 2 The hollow box is prepared by the following method:

[0065] In the ultrasonic microwave integrated device, the ultrasonic power of the ultrasonic nebulizer 3 is set to 320W, and the spray volume is 0.4L / h, and then 1g of titanium difluoride, 50mL of absolute ethanol and 0.3g of methionine are added to the ultrasonic nebulizer 3, Under the pre-set conditions, the solution was stirred evenly with the ultrasonic nebulizer 3 and dispersed into a uniform mist 8, and the mist 8 was slowly transported to the ultrasonic microwave under the action of nitrogen in the nitrogen bottle (flow rate: 50mL / min). The reaction is carried out in the reactor 7. The ultrasonic microwave temperature of the ultrasonic microwave reactor 7 is 650°C, the ultrasonic microwave time is 5h, and the ultrasonic microwave power is 500W. Filter screen 9 enters microwave drier 11, after microwave drier 11 is at drying temperature 50...

Embodiment 3

[0066] Example 3: A spiny mosaic TiO doped with nitrogen and sulfur elements 2 The symbiotic structure of hollow sphere and hollow box is prepared by the following method:

[0067] In the ultrasonic microwave integrated device, the ultrasonic power of the ultrasonic nebulizer 3 is set to 200W, and the spray volume is 0.5L / h, and then 1g of titanium difluoride, 40mL of absolute ethanol and 0.2g of methionine are added to the ultrasonic nebulizer 3, Under the pre-set conditions, the solution was stirred evenly with the ultrasonic nebulizer 3 and dispersed into a uniform mist 8, and the mist 8 was slowly transported to the ultrasonic microwave under the action of nitrogen in the nitrogen bottle (flow rate: 50mL / min). The reaction is carried out in the reactor 7, the ultrasonic microwave temperature is 450°C, the ultrasonic microwave time is 4h, and the ultrasonic microwave power is 400W. After the reaction is completed, the partition 15 is opened, and the particles precipitated f...

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Abstract

The invention belongs to the technical field of photocatalysts and particularly relates to nonmetal co-doped thorn-shaped inlaid TiO2 hollow structures as well as a preparation method and an application thereof. A titanium source, alcohol and a nonmetal element dopant are added to a self-made ultrasonic integrated device, the solution is dispersed into uniform mist by an ultrasonic sprayer, the mist is slowly conveyed to an ultrasonic reactor to react under the action of inert gas, then, the mists passes through a microwave dryer, the nonmetal co-doped thorn-shaped inlaid TiO2 hollow structures, including thorn-shaped hollow spheres, thorn-shaped hollow boxes and symbiotic structures of thorn-shaped hollow spheres and hollow boxes, can be obtained by controlling the amount of alcohol and conditions of a reaction device, and these nonmetal co-doped thorn-shaped inlaid TiO2 hollow structure photocatalysts have better catalytic effects on degradation of organic pollutants and organic oxidation reactions.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a non-metallic co-doped thorn mosaic TiO 2 Hollow structure and its preparation method and application. Background technique [0002] TiO 2 As a non-toxic, cheap, strong oxidation ability and no secondary pollution semiconductor photocatalytic material, it is used in the treatment of industrial wastewater and waste gas, hydrogen production, solar energy conversion and other aspects. But TiO 2 There is a problem that it can only be excited by ultraviolet light with a shorter absorption wavelength, and the solar energy utilization rate and quantum efficiency are relatively low, which hinders the development of TiO 2 application in practice. Researchers have proposed many TiO 2 Modification methods include ion doping, shape change, dye sensitization, noble metal surface deposition and semiconductor recombination to improve its photocatalytic performance. [0003] Ion do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J27/24B01J21/06B01J19/10B01J19/12C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J19/10B01J19/126B01J21/063B01J27/24B01J35/004C01G23/053C01P2004/03C01P2004/04C01P2004/30C01P2004/34C02F1/30C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 陈连清韦晓珊
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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