A kind of nitrogen oxide nanoparticle photocatalyst and its application

A nitrogen oxide and nanoparticle technology, applied in the field of photocatalytic materials, can solve the problems of poor stability, inability to effectively absorb visible light, low solar light absorption rate, etc., and achieve good monodispersity, excellent solar photocatalytic water splitting system. Hydrogen and photodegradation of formaldehyde, good chemical stability

Active Publication Date: 2021-09-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, for solar photocatalytic water splitting hydrogen production and formaldehyde degradation, common photocatalysts mainly focus on TiO 2 (A photocatalytic degradation of formaldehyde film, patent number: CN 106390740A), CdS (The Journal of Physical Chemistry C, 115 (2011) 11466-11473), etc., but these photocatalysts either only respond to ultraviolet light, resulting in low solar light absorption rate , cannot effectively absorb visible light, or have poor stability and toxic metals that are easy to cause harm to the environment, so they are not the most ideal photocatalysts for hydrogen production and formaldehyde degradation

Method used

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  • A kind of nitrogen oxide nanoparticle photocatalyst and its application
  • A kind of nitrogen oxide nanoparticle photocatalyst and its application
  • A kind of nitrogen oxide nanoparticle photocatalyst and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Ta 3 N 5 Preparation and performance testing of nanoparticles

[0032] Under the condition of temperature at 298K, tantalum pentachloride ethanol solution (1g tantalum pentachloride, 5mL ethanol) was dissolved in 100mL deionized water to obtain transparent solution S1; 20g of sodium hydroxide was dissolved in 100mL deionized water, Obtain a transparent solution S2; add the S2 solution dropwise to the stirred S1 solution at a rate of 30 drops per minute, from the beginning to the end of the stirring, the whole process time is 4 hours, and the product is a flocculent white oxide, Wash with deionized water until the pH value is neutral, and place it in an oven to obtain the metal oxide precursor powder P1; the powder P1 is placed in an alumina crucible, and under the protection of an ammonia atmosphere, it is burned at 1223K for 5 hours to obtain Ta 3 N 5 Powder; Ta 3 N 5 Immerse the powder in 5mL of aqua regia, and place it in a 353-363K oven for heat treatment for 2...

Embodiment 2

[0035] Preparation and Performance Test of TaON Nanoparticles

[0036]Under the condition of temperature at 298K, tantalum pentachloride ethanol solution (1g tantalum pentachloride, 5mL ethanol) was dissolved in 100mL deionized water to obtain transparent solution S1; 20g of sodium hydroxide was dissolved in 100mL deionized water, Obtain a transparent solution S2; add the S2 solution dropwise to the stirred S1 solution at a rate of 30 drops per minute, from the beginning to the end of the stirring, the whole process takes 3 hours, and the product is a flocculent white oxide, Wash with deionized water until the pH value is neutral, and place it in an oven to obtain the metal oxide precursor powder P1; the powder P1 is placed in an alumina crucible, and under the protection of an ammonia atmosphere, it is burned at 1073K for 2 hours to obtain TaON powder; impregnate TaON powder in 5mL of aqua regia, and place it in a 353-363K oven for heat treatment for 2-12 hours; absorb the up...

Embodiment 3

[0039] LaTaON 2 Preparation and performance testing of nanoparticles

[0040] Under the condition of temperature at 298K, dissolve 1.2095g lanthanum nitrate hexahydrate and tantalum pentachloride ethanol solution (1g tantalum pentachloride, 5mL ethanol) in 100mL deionized water to obtain transparent solution S1; Dissolve in 100mL deionized water to obtain a transparent solution S2; add the S2 solution dropwise to the stirred S1 solution at a rate of 50 drops per minute, from the beginning of the dropwise addition to the end of the stirring, the entire process time is 6 hours, the product It is a flocculent white oxide, washed with deionized water until the pH value is neutral, and placed in an oven to obtain a metal oxide precursor powder P1; the powder P1 is placed in an alumina crucible, and under the protection of an ammonia atmosphere, it is burned at 1223K Burn for 10 hours and get LaTaON 2 Powder; LaTaON 2 Immerse the powder in 5mL of aqua regia, and place it in a 353...

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Abstract

The invention relates to a nitrogen oxide nanoparticle photocatalyst and its application. The nitrogen oxide nanoparticle photocatalyst is A a B b o c N d Type nitrogen oxide, wherein, 0≤a, b, c, d≤5, A is a kind of calcium, strontium, barium, lanthanum or sodium, B is a kind of titanium, tantalum or niobium, prepared by the following steps : Preparation of metal oxide precursor by co-precipitation method: perovskite nitrogen oxide is prepared by ammonification and burning of metal oxide precursor, and nitrogen oxide nanoparticle photocatalyst is obtained after aqua regia treatment. After the photocatalyst nanoparticles are loaded with a suitable co-catalyst, they exhibit excellent photocatalytic water splitting hydrogen production and photodegradation of organic pollutant formaldehyde under sunlight.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a nitrogen oxide nanoparticle photocatalyst and its application. Background technique [0002] With the rapid development of social economy, human beings have significantly improved in science and technology, and the consumption of fossil fuels based on this has brought energy crisis and environmental problems. Studies have shown that fossil energy will be exhausted in the next few hundred years, and the toxic and harmful gases released after burning will cause environmental problems such as greenhouse effect, acid rain, and smog. Therefore, it is particularly important to develop a green and clean new energy source. [0003] As we all know, solar energy, as an inexhaustible renewable clean energy, has attracted increasing attention because of its abundant reserves and wide distribution. However, the low energy density of solar energy is easily affe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J31/28B01J35/00B01J35/02B01D53/86B01D53/72C01B3/04C25B1/04C25B11/091C25B11/093
CPCB01D53/8668B01J27/24B01J31/003B01J31/28B01J35/0013B01J35/004B01J35/023C01B3/042C25B1/04C25B11/04Y02E60/36
Inventor 徐晓翔汪亚威喻金星
Owner TONGJI UNIV
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