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Lotus-root-shaped porous carbon/oxyhalogen bismuth semiconductor composite photocatalysis material as well as preparation and application thereof

A composite photocatalysis, porous carbon technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of weak visible light activity, large forbidden band width, low quantum efficiency, etc. Low cost, good stability and strong catalytic ability

Inactive Publication Date: 2017-01-04
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems such as the large band gap, low quantum efficiency, poor stability, and weak visible light activity of traditional photocatalytic degradation materials, and to provide a porous carbon material based on lotus root-shaped micro-nano hierarchical structure and BiOX (X= Cl, Br, I) compound preparation method of high-efficiency photocatalytic degradation composite material and its use method for treating organic pollutants in water bodies

Method used

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  • Lotus-root-shaped porous carbon/oxyhalogen bismuth semiconductor composite photocatalysis material as well as preparation and application thereof
  • Lotus-root-shaped porous carbon/oxyhalogen bismuth semiconductor composite photocatalysis material as well as preparation and application thereof
  • Lotus-root-shaped porous carbon/oxyhalogen bismuth semiconductor composite photocatalysis material as well as preparation and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1. Material preparation:

[0058] (1) The air-dried cattail grass is placed in a tube furnace and carbonized for a period of time under the protection of inert gas. The black powder collected after cooling is the lotus root-like porous carbon.

[0059] (2) Add 36mg of lotus root-like porous carbon to a 20ml mixture of ethanol and ethylene glycol in a beaker and stir for 30 minutes (including 8ml of ethanol and 12ml of ethylene glycol), and then add 3m mol (1.4553g) of Bi(NO) 3 ) 3 ·5H 2 O, marked as solution 1; meanwhile, 3m mol of KI (0.4980g) was dissolved in 20ml of ethanol and ethylene glycol mixed solution (of which 8ml of ethanol, 12ml of ethylene glycol), recorded as solution 2;

[0060] (3) Solutions 1 and 2 were quickly stirred at room temperature for 30 minutes; the stirred solution 2 was quickly added to solution 1, and quickly stirred at room temperature for 60 minutes;

[0061] (4) Load the above-mentioned mixed liquid into a microwave reactor and perform microwave ...

Embodiment 2

[0076] Material preparation: (1) Air-dried cattail grass is placed in a tube furnace and carbonized for a period of time under the protection of inert gas. The black powder collected after cooling is lotus root-like porous carbon.

[0077] (2) Add 36mg of lotus root-like porous carbon to a 20ml mixture of ethanol and ethylene glycol in a beaker and stir for 30 minutes (including 8ml of ethanol and 12ml of ethylene glycol), and then add 3m mol (1.4553g) of Bi(NO) 3 ) 3 ·5H 2 O, marked as solution 1; meanwhile, 3m mol of KBr (0.3570g) was dissolved in 20ml of ethanol and ethylene glycol mixed solution (of which 8ml of ethanol, 12ml of ethylene glycol), recorded as solution 2;

[0078] (3) Solutions 1 and 2 were quickly stirred at room temperature for 30 minutes; the stirred solution 2 was quickly added to solution 1, and quickly stirred at room temperature for 60 minutes;

[0079] (4) Load the above-mentioned mixed liquid into a microwave reactor and perform microwave reaction at 600W f...

Embodiment 3

[0090] (1) The air-dried cattail grass is placed in a tube furnace and carbonized for a period of time under the protection of inert gas. The black powder collected after cooling is the lotus root-like porous carbon.

[0091] (2) Add 36mg of lotus root-like porous carbon to a 20ml mixture of ethanol and ethylene glycol in a beaker and stir for 30 minutes (including 8ml of ethanol and 12ml of ethylene glycol), and then add 3m mol (1.4553g) of Bi(NO) 3 ) 3 ·5H 2 O, marked as solution 1; at the same time, 1.5m mol of KI (0.2490g) and 1.5m mol of KBr (0.1785g) were dissolved in 20ml of ethanol and ethylene glycol mixed solution (including 8ml of ethanol and 12ml of ethylene glycol), Recorded as solution 2;

[0092] (3) Solutions 1 and 2 were quickly stirred at room temperature for 30 minutes; the stirred solution 2 was quickly added to solution 1, and quickly stirred at room temperature for 60 minutes;

[0093] (4) Load the above mixed liquid into a microwave reactor and perform microwav...

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Abstract

The invention discloses a lotus-root-shaped porous carbon / oxyhalogen bismuth semiconductor composite photocatalysis material as well as preparation and application thereof. The preparation of the material comprises the following steps: putting air-dried typha angustata into a tubular furnace, carbonizing for a period of time under the protection of inert gas, and collecting black powder, namely lotus-root-shaped porous carbon; adding a certain mass of the lotus-root-shaped porous carbon into alcoholic solution and bismuth salt, and stirring, wherein the obtained solution is denoted as solution 1; meanwhile, dissolving halide into the same alcoholic solution, wherein the obtained solution is denoted as solution 2; quickly adding the stirred solution 2 into the solution 1, and continuously stirring for a period of time; putting the mixed liquid into a microwave reactor, and carrying out microwave reaction for 1-190 minutes at different powers; centrifuging for taking out precipitates obtained during reaction, washing, and drying, so that the lotus-root-shaped porous carbon / oxyhalogen bismuth semiconductor composite photocatalysis material is obtained; and finally, weighing the photocatalysis material, adding a certain concentration of organic pollutant, putting into a photocatalysis instrument, and carrying out photodegradation reaction, so that performance of the lotus-root-shaped porous carbon / oxyhalogen bismuth semiconductor composite photocatalysis material can be measured.

Description

Technical field [0001] The invention relates to a lotus root-shaped porous carbon / bismuth oxyhalide semiconductor composite photocatalytic material, preparation and application, and is an environmental restoration material used for visible light catalytic degradation of organic pollutants in a water environment, belonging to the field of material preparation and environmental restoration. Background technique [0002] For a long time, a large number of chemical raw materials have been used in various industrial production, which in turn produces a large number of high-concentration water pollutants. The sewage often contains a lot of toxic organic substances, and the discharge without treatment or incomplete treatment has caused serious pollution to water resources. Because these organic pollutants are difficult to be degraded and have strong toxicity and carcinogenicity, they have become a major problem that endangers human survival. Therefore, finding a method to remove organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J27/06C02F1/30
CPCC02F1/30B01J27/06B01J27/22B01J37/084B01J37/346C02F2305/10B01J35/50B01J35/39Y02W10/37
Inventor 侯建华魏蕊陈丹左天培蒋坤沈明
Owner YANGZHOU UNIV
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