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W-TiO2 monatomic supported photocatalyst and preparation method thereof

A photocatalyst and atomic technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, catalyst, etc., can solve problems affecting photocatalytic stability, etc., and achieve the effect of improving photocatalytic activity, low cost, and wide sources

Active Publication Date: 2021-08-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing modification technologies are mainly anion and cation doping, noble metal deposition, morphology and crystal plane control, defect engineering, and forming heterojunction catalysts with other semiconductors, etc., but these methods also have shortcomings, such as affecting optical Stability during catalysis, etc.

Method used

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  • W-TiO2 monatomic supported photocatalyst and preparation method thereof
  • W-TiO2 monatomic supported photocatalyst and preparation method thereof
  • W-TiO2 monatomic supported photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of W-TiO 2 The preparation method of single atom supported photocatalyst comprises the steps:

[0025] S100: Weigh TiO according to the mass ratio of 10:1 2 and tungsten hexacarbonyl, and put them in a mortar, mix them thoroughly to get a well-mixed mixture, and then seal the mixture in a vacuum quartz tube

[0026] S200: Place the sealed vacuum quartz tube containing the mixture in a box-type resistance furnace, raise the temperature of the box-type resistance furnace to 80°C at a heating rate of 5°C / min to sublimate tungsten hexacarbonyl, and then keep the temperature at 80°C Keep for 1h;

[0027] S300: Continue to heat up to 500°C at a heating rate of 2-5°C / min, calcining for 2 hours, wait for the resistance furnace to cool down to room temperature, and then take out the vacuum quartz tube, and then obtain a blue powder;

[0028] S400: wash the blue powder with deionized water 2 to 3 times, and dry at 60°C to obtain W-TiO 2 Single atom supported photocatal...

Embodiment 2

[0030] A kind of W-TiO 2 The preparation method of single atom supported photocatalyst comprises the steps:

[0031] S100: Weigh TiO according to the mass ratio of 10:1 2 and tungsten hexacarbonyl, and put them in a mortar, mix them thoroughly to get a well-mixed mixture, and then seal the mixture in a vacuum quartz tube

[0032] S200: Place the sealed vacuum quartz tube containing the mixture in a box-type resistance furnace, raise the temperature of the box-type resistance furnace to 80°C at a heating rate of 5°C / min to sublimate tungsten hexacarbonyl, and then keep the temperature at 80°C Keep for 1h;

[0033] S300: Continue to heat up to 600°C at a heating rate of 2-5°C / min, calcining for 2 hours, wait for the resistance furnace to cool down to room temperature, and then take out the vacuum quartz tube, and then obtain a blue powder;

[0034] S400: wash the blue powder with deionized water 2 to 3 times, and dry at 60°C to obtain W-TiO 2 Single atom supported photocatal...

Embodiment 3

[0036] A kind of W-TiO 2 The preparation method of single atom supported photocatalyst comprises the steps:

[0037] S100: Weigh TiO according to the mass ratio of 10:1 2 and tungsten hexacarbonyl, and put them in a mortar, mix them thoroughly to get a well-mixed mixture, and then seal the mixture in a vacuum quartz tube

[0038] S200: Place the sealed vacuum quartz tube containing the mixture in a box-type resistance furnace, raise the temperature of the box-type resistance furnace to 80°C at a heating rate of 5°C / min to sublimate tungsten hexacarbonyl, and then keep the temperature at 80°C Keep for 1h;

[0039] S300: Continue to heat up to 700°C at a heating rate of 2-5°C / min, calcining for 2 hours, wait for the resistance furnace to cool down to room temperature, and then take out the vacuum quartz tube, and then obtain a blue powder;

[0040] S400: wash the blue powder with deionized water 2 to 3 times, and dry at 60°C to obtain W-TiO 2 Single atom supported photocatal...

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Abstract

The invention relates to a preparation method of a W-TiO2 monatomic supported photocatalyst. The preparation method comprises the following steps: sealing a mixture of TiO2 and tungsten hexacarbonyl in a vacuum tube; placing the vacuum tube filled with TiO2 and tungsten hexacarbonyl in a high-temperature environment to sublimate tungsten hexacarbonyl, and keeping constant temperature for a preset time; continuously raising the temperature to a high-temperature environment, and calcining the mixture in the vacuum tube to obtain blue powder; and washing and drying the blue powder to obtain the W-TiO2 monatomic supported photocatalyst. The W-TiO2 monatomic supported photocatalyst is prepared by the preparation method. According to the preparation method, TiO2 is modified by metal W monatomic, the preparation raw materials are wide in source and easy to obtain, the high-activity monatomic supported photocatalyst can be prepared on a large scale through a preparation process combining a sublimation method and a high-temperature calcination method, the photocatalytic activity is improved by utilizing the surface plasma effect, and the preparation method has the advantages of being easy to operate, safe, low in cost and the like.

Description

technical field [0001] The invention relates to the technical field of photocatalysts and new materials, in particular to a W-TiO 2 Single atom supported photocatalyst and preparation method thereof. Background technique [0002] Photocatalytic technology has the characteristics of renewability, high efficiency, and eco-friendliness, and can convert solar energy into chemical energy under relatively mild conditions, such as photocatalytic methane oxidation to methanol, CO 2 The reduction to methanol and photocatalytic hydrogen evolution can not only alleviate the energy crisis, but also control environmental problems. Among many photocatalytic materials, TiO 2 Because of its stable chemical properties, non-toxic, harmless, no secondary pollution, strong corrosion resistance, and low price, it is considered to be the most promising material in photocatalysts. But TiO 2 The bandgap width of TiO is 3.2eV, and it can only be excited by ultraviolet light or higher energy ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J37/08C01B32/40C07C1/02C07C9/04
CPCB01J23/30B01J37/08B01J37/086C01B32/40C07C1/02C07C2523/30B01J35/39C07C9/04
Inventor 张高科李源裴晓丹
Owner WUHAN UNIV OF TECH
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