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Preparation method and application of nonmetal doped stainless steel mesh composite material

A technology of stainless steel mesh and composite materials, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as inability to produce metal nanoparticles on a large scale, cumbersome preparation process, and loss of active centers , to achieve excellent electron transfer ability, rich pore structure, and enhanced performance

Active Publication Date: 2019-08-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies in the prior art, to provide a method for preparing a non-metallic doped stainless steel mesh composite material and its application for degrading organic pollutants. What needs to be solved is that the preparation process is cumbersome, the process cost is high, and the synthesis time is long. , can not be produced on a large scale, and the metal nanoparticles are easy to oxidize and lose active centers during the catalytic degradation reaction.

Method used

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  • Preparation method and application of nonmetal doped stainless steel mesh composite material
  • Preparation method and application of nonmetal doped stainless steel mesh composite material
  • Preparation method and application of nonmetal doped stainless steel mesh composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] In this example, firstly, a nitrogen-doped metal nanoparticle-loaded stainless steel mesh composite material was prepared according to the following steps.

[0036]1. Pretreatment of stainless steel: put 1.4g of 2000-mesh stainless steel mesh in ethanol and aqueous solution to remove surface impurities by ultrasonic, then put it in a mixed solution of 1M lithium chloride monohydrate and 1M phosphoric acid, and conduct 2h at 120°C. After activation treatment, it is washed with water several times until neutral and then dried for later use.

[0037] 2. Loading of non-metallic elements: Weigh 2g of melamine and the pretreated stainless steel mesh and place them in a quartz boat, then transfer the whole to a tubular resistance furnace, perform calcination and pyrolysis under the protection of an inert gas, and cool to At room temperature, the target product was obtained. Among them, the process of calcination and pyrolysis is to raise the temperature to 700° C. at a heatin...

Embodiment 2

[0049] In this example, a non-metal-doped stainless steel mesh composite material was prepared in the same manner as in Example 1, the only difference being that 2 g of dicyandiamide was used instead of 2 g of melamine to obtain the target non-metal-doped stainless steel mesh composite material.

[0050] Construct the organic pollutant catalytic reaction device identical with embodiment 1 with the nonmetal-doped stainless steel mesh composite material of the present embodiment, process following organic pollutant solution: the golden orange II solution simulation organic pollutant waste water (V of preparation 20mg / L =1000 mL), and 200 mg of oxidant permonomonosulfate (PMS) was added at the same time, and the degradation experiment was carried out by using an organic pollutant catalytic reaction device. After testing, the degradation rate of organic pollutant Golden Orange II can reach 100%.

Embodiment 3

[0052] In this example, a non-metal-doped stainless steel mesh composite material was prepared in the same manner as in Example 1, the only difference being that 2 g of urea was used instead of 2 g of dicyandiamide to obtain the target product non-metal-doped stainless steel mesh composite material.

[0053] Construct the organic pollutant catalytic reaction device identical with embodiment 1 with the nonmetal-doped stainless steel mesh composite material of the present embodiment, process following organic pollutant solution: the golden orange II solution simulation organic pollutant waste water (V of preparation 20mg / L =1000 mL), and 200 mg of oxidant permonomonosulfate (PMS) was added at the same time, and the degradation experiment was carried out by using an organic pollutant catalytic reaction device. After testing, the degradation rate of organic pollutant Golden Orange II can reach 100%.

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Abstract

The invention discloses a preparation method and application of a nonmetallic doped stainless steel mesh composite material, and the preparation method comprises the following steps of: firstly, performing surface activation treatment on a cleaned stainless steel mesh by adopting a mixed solution of lithium chloride and phosphoric acid; and transferring the activated stainless steel mesh and an inorganic nonmetal source to a tubular furnace for calcination and pyrolysis to obtain the target product. The composite material can be used as a catalyst to construct an organic pollutant catalytic reaction device to degrade organic pollutants, the catalytic degradation rate reaches 100%, and the removal rate of total organic carbon reaches more than 99%.

Description

technical field [0001] The invention relates to a preparation method and application of a non-metal-doped stainless steel composite material, belonging to the technical field of inorganic catalyst preparation. Background technique [0002] Persistent Toxic Pollutants are a class of pollutants that are difficult to degrade in the environment, can be transported over long distances, and have the characteristics of bioaccumulation and "three-caused" toxicity. Due to their complex composition, strong biological toxicity, and poor biochemical Difficult to use traditional physical and chemical methods and biochemical technology for governance. How to eradicate persistent toxic pollutants is a key technical problem that needs to be solved urgently in the field of water pollution control. Subsequently, advanced oxidation technology has become a research hotspot in the field of sewage treatment by virtue of its ability to efficiently mineralize toxic organic pollutants in water. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24C02F1/725C02F2101/30C02F2101/34C02F2101/345C02F2101/36C02F2101/38C02F2101/40
Inventor 姚运金余茂静胡欢欢高梦雪尹红玉张阳洋
Owner HEFEI UNIV OF TECH
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