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A photocatalyst with visible light response and preparation method thereof

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of lack of visible light response, etc., and achieve the effects of easy industrial production, simple operation, and mild reaction

Active Publication Date: 2020-10-30
YANGZHOU MINGSHENG NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a lack of visible light-responsive photocatalytic materials for the degradation of indoor organic gases in the prior art.

Method used

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  • A photocatalyst with visible light response and preparation method thereof
  • A photocatalyst with visible light response and preparation method thereof
  • A photocatalyst with visible light response and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of photocatalyst with visible light response, it is prepared by following steps:

[0025] S1. Weigh 20g of urea and place it in a muffle furnace, raise the temperature to 550°C at a rate of 10°C / min, keep it warm for 4 hours, and then cool down naturally to prepare graphite phase nitrogen carbide powder;

[0026] S2. Weigh 0.2g of graphite phase nitrogen carbide powder and ultrasonically disperse it in 50ml of absolute ethanol solvent to obtain a dispersion;

[0027] S3. Weigh 0.004mol tantalum oxide and dissolve it in 30ml deionized water, then weigh 0.005mol barium hydroxide and dissolve it in 30ml deionized water; then slowly add the tantalum oxide solution dropwise into the bismuth nitrate solution, continue stirring for 30min, and then add 4g of NaOH particles, and then transferred to a hydrothermal kettle for 24 hours of hydrothermal reaction at 270°C; the reaction product was cooled, filtered, and washed with absolute ethanol, and then ultrasonically dispe...

Embodiment 2

[0030] Each step of the preparation method of a photocatalyst with visible light response described in this embodiment is all the same as in Example 1, and the different technical parameters are: Ba in S4 5 Ta 4 o 15 Quantum dot mass fraction is 1%wt; Gained described quantum dot sensitized graphite phase nitrogen carbide photocatalyst with visible light response, expressed with BTO / g-CN2, its composite particle diameter is 10-50nm, wherein Ba 5 Ta 4 o 15 The particle diameter of the quantum dot is 3nm, and the thickness of the graphite phase nitrogen carbide is 10nm.

Embodiment 3

[0032] Each step of the preparation method of a photocatalyst with visible light response described in this embodiment is all the same as in Example 1, and the different technical parameters are: Ba in S4 5 Ta 4 o 15 Quantum dot mass fraction is 3%wt; Gained described quantum dot sensitized graphite phase nitrogen carbide photocatalyst with visible light response, expressed with BTO / g-CN3, its composite particle diameter is 10-50nm, wherein Ba 5 Ta 4 o 15 The particle size of the quantum dots is 5nm, and the thickness of the graphite phase nitrogen carbide is 25nm.

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Abstract

The invention belongs to the technical field of fruit and vegetable preservation and environmental protection, and specifically relates to a photocatalyst with visible light response and a preparation method thereof. The photocatalyst is a nanoscale powder material composed of Ba 5 Ta 4 O 15 Quantum dots and graphite phase carbonized nitrogen are composited, and the Ba 5 Ta 4 O 15 The mass ratio of quantum dots and graphite phase carbonized nitrogen is (0.5-3):100. The preparation method of the composite material is a low-temperature solution method, using tantalum oxide and barium hydroxide as raw materials, and generating Bi under alkaline conditions at 230-270°C. 3 tO 7 Quantum dots are combined with graphite phase carbonized nitrogen in a mixed solvent of ethanol and water to obtain a powder material. The composite material provided by the present invention has excellent visible light catalytic purification of organic gaseous substances in the air, and can be used in the fields of indoor air pollution control and fruit and vegetable preservation; the preparation method provided by the present invention is a hydrothermal solution method, which is simple to operate and efficient in reaction The equipment has no special requirements and is easy for industrial production.

Description

technical field [0001] The invention belongs to the technical field of fruit and vegetable preservation and environmental protection, and in particular relates to a photocatalyst with visible light response and a preparation method thereof. Background technique [0002] With the continuous improvement of living standards, indoor formaldehyde, toluene and other organic air pollution have attracted more and more attention. How to reduce and purify indoor air pollutants is imminent. In addition, in the field of fruit and vegetable preservation, during the storage of fruits and vegetables, when various acids in fruits and vegetables turn into sugars, ethylene will be released at the same time. This gas accelerates the ripening speed of fruits and vegetables and greatly shortens the storage time of fruits and vegetables. Therefore, how to Effectively reducing the ethylene concentration in the warehouse has always been a research hotspot in the field of fruit and vegetable preserv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/02A23B7/152B01D53/86B01D53/44B01J35/00
CPCB01D53/8668A23B7/152B01J27/24B01D2259/802B01D2257/7027B01D2257/70B01D2258/06B01J35/39B01J35/40B01J35/50
Inventor 张高科王金龙林和春
Owner YANGZHOU MINGSHENG NEW TECH
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