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Oxygen-rich vacancy type black phosphorus quantum dot/bismuth oxycarbonate visible light catalyst and preparation method and application

A technology of bismuth oxycarbonate and quantum dots, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low absorption efficiency, achieve effective quality improvement, high efficiency, and simple preparation methods Effect

Active Publication Date: 2022-07-15
INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a wide bandgap semiconductor (~3.2eV), it can only absorb ultraviolet light with a wavelength of less than 380nm (accounting for only 8% of sunlight), and the absorption efficiency of visible light is low

Method used

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  • Oxygen-rich vacancy type black phosphorus quantum dot/bismuth oxycarbonate visible light catalyst and preparation method and application
  • Oxygen-rich vacancy type black phosphorus quantum dot/bismuth oxycarbonate visible light catalyst and preparation method and application
  • Oxygen-rich vacancy type black phosphorus quantum dot/bismuth oxycarbonate visible light catalyst and preparation method and application

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preparation example Construction

[0022] A preparation method of an oxygen-enriched vacancy type black phosphorus quantum dot / bismuth oxycarbonate visible light catalyst of the present invention comprises the following steps:

[0023] (1) Preparation of black phosphorus quantum dots:

[0024] Weigh black phosphorus and sodium hydroxide in a glove box, add deoxygenated absolute ethanol, seal them in an agate cup, and grind them with a ball mill at 300-600 rpm for 3-9 hours. Then transfer it into a round-bottomed flask, add a certain volume of deoxygenated absolute ethanol, heat the solvent under nitrogen bubbling at 80-120 °C for 4-16 h, and cool to room temperature naturally to obtain a black phosphorus quantum dot solution. Among them, the mass ratio of black phosphorus crystal to sodium hydroxide is 1:(0.5~15).

[0025] (2) Preparation of oxygen-rich vacancy black phosphorus quantum dots / bismuth oxycarbonate:

[0026] The nano-flaky bismuth oxycarbonate is treated with a flow rate of 30-50mL / min in a reduc...

Embodiment 1

[0030] Weigh 20 mg of black phosphorus and 10 mg of sodium hydroxide in a glove box, add 20 mL of deoxygenated absolute ethanol, seal them in an agate cup, and grind them with a ball mill at 300 rpm for 3 h. Then it was transferred to a round-bottomed flask, 30 mL of deoxygenated absolute ethanol was added, and the solvent was heated to reflux at 80°C for 4 h under nitrogen bubbling, and cooled to room temperature naturally to obtain a black phosphorus quantum dot solution.

[0031] 0.5 g of nano-flaky bismuth oxycarbonate was treated at 280 °C for 3 h at a flow rate of 30 mL / min in a nitrogen atmosphere, then dispersed in an ethanol solution, and 50 μL of black phosphorus quantum dot solution was added. After ultrasonic treatment for 10 min, it was added to a microwave reaction tube. , under the action of power 500W, microwave solvothermal reaction at 60°C for 30min, washed with deionized water and ethanol respectively after natural cooling, and dried at 60°C under vacuum to o...

Embodiment 2

[0033] Weigh 20 mg of black phosphorus and 0.1 g of sodium hydroxide in a glove box, add 20 mL of deoxygenated absolute ethanol, seal them in an agate cup, and grind them with a ball mill at 400 rpm for 6 h. Then it was transferred to a round-bottomed flask, 30 mL of deoxygenated absolute ethanol was added, and the solvent was heated to reflux at 100 °C for 10 h under nitrogen bubbling, and cooled to room temperature naturally to obtain a black phosphorus quantum dot solution.

[0034]0.5 g of nano-flaky bismuth oxycarbonate was treated at 290 °C for 5 h at a flow rate of 40 mL / min in a nitrogen atmosphere, then dispersed in an ethanol solution, and 100 μL of black phosphorus quantum dot solution was added. After ultrasonic treatment for 20 min, it was added to a microwave reaction tube. , under the action of power 700W, microwave solvothermal reaction at 70°C for 10min, washed with deionized water and ethanol respectively after natural cooling, and dried at 60°C under vacuum t...

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Abstract

An oxygen-enriched vacancy type black phosphorus quantum dot / bismuth oxycarbonate visible light catalyst, preparation method and application, the nano-flaky bismuth oxycarbonate is heat-treated and then dispersed in an ethanol solution, then the black phosphorus quantum dot solution is added, and after ultrasonic uniformity, the The microwave reaction is carried out at a power of 500-800 W to obtain an oxygen-rich vacancy type black phosphorus quantum dot / bismuth oxycarbonate visible light catalyst. The oxygen-enriched vacancy type black phosphorus quantum dots / bismuth oxycarbonate prepared by the invention can effectively remove NO from ambient air pollutants under visible light irradiation, the synthesis method is simple, fast and low in cost, and the black phosphorus quantum dots are evenly loaded, and have the advantages of good application prospects.

Description

technical field [0001] The invention belongs to the field of visible light catalytic material preparation, and relates to an oxygen-rich vacancy type black phosphorus quantum dot / bismuth oxycarbonate visible light catalyst as well as a preparation method and application. Background technique [0002] NO in ambient atmosphere x It has low concentration, strong diffusivity, and is not easy to remove. traditional NO x Treatment techniques include physical absorption, adsorption, and selective catalytic reduction, etc., but most of them are only suitable for removing high concentrations of NO x Polluting gases, and there are problems such as low efficiency, high energy consumption, and secondary pollution. Nano-photocatalytic purification technology can use solar energy to achieve low concentration of NO in ambient atmosphere under normal temperature and pressure x It is considered to be one of the effective strategies to protect the ecological environment and deal with poll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/232B01J37/34B01J27/14B82Y30/00B82Y40/00B01D53/86B01D53/56C09K11/70B82Y20/00
CPCB01J27/232B01J35/004B01J37/343B01J37/346B01J27/14C09K11/70B82Y20/00B82Y30/00B82Y40/00B01D53/8628B01D2257/404B01D2258/06
Inventor 黄宇路艳峰姜柳李海玮李顺诚
Owner INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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