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Self-assembling carbon nitride-TiO2/hollow structure biomass charcoal degradation ammonia nitrogen composite and preparation method thereof

A biochar and ammonia nitrogen degradation technology, applied in chemical instruments and methods, chemical/physical processes, water treatment of special compounds, etc., can solve the problems of high management input and cost, harsh treatment conditions, etc., and achieve low cost and good experimental conditions Simple and controllable preparation process

Inactive Publication Date: 2019-04-12
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is more common to use biological methods to treat low-concentration ammonia nitrogen, but under the condition of high polluting ammonia nitrogen concentration, biological methods require more stringent treatment conditions, and the management input and cost are high. Therefore, it is necessary to find efficient and rapid removal methods and Material

Method used

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  • Self-assembling carbon nitride-TiO2/hollow structure biomass charcoal degradation ammonia nitrogen composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a) Cut the cannabis into small pieces (1.5mm~2mm) with a pulverizer, wash it with ethanol, dry it in a 50°C oven for 6 hours, take out the sample and place it in a tube furnace, and heat it up to 450°C under nitrogen protection, Obtain biomass charcoal for 2 hours;

[0030] b) Soak 80 mg of biomass charcoal in 60 mL of glacial acetic acid, stir magnetically for 10 min to obtain a uniform suspension, 4 mL of sodium dodecylbenzene sulfonate and 4 mL of dimethyl sulfoxide are added to the suspension to fully dissolve Slowly drop 4 mL of titanium isopropoxide into the suspension and stir magnetically for 30 min to obtain a uniform suspension;

[0031] c) Transfer the homogeneous suspension to a suitable size reactor, hydrothermally react at 120 °C for 11 h, filter with suction, wash with ethanol for three times, and then dry it in an oven at 75 °C for 6 h to obtain TiO 2 / HSBC;

[0032] d) According to the mass ratio of melamine:cyanuric acid is 1:1.02, they are respectiv...

Embodiment 2

[0036] a) Cut the cannabis into small pieces (1.5mm~2mm) with a pulverizer, wash it with ethanol, dry it in a 50°C oven for 6 hours, take out the sample and place it in a tube furnace, and heat it up to 500°C under nitrogen protection, Obtain biomass charcoal for 2 hours;

[0037] b) Soak 80 mg of biomass charcoal in 60 mL of glacial acetic acid, stir magnetically for 10 min to obtain a uniform suspension, 4 mL of sodium dodecylbenzene sulfonate and 4 mL of dimethyl sulfoxide are added to the suspension to fully dissolve Slowly drop 4 mL of titanium isopropoxide into the suspension and stir magnetically for 30 min to obtain a uniform suspension;

[0038] c) Transfer the homogeneous suspension to a suitable size reactor, hydrothermally react at 120 °C for 11 h, filter with suction, wash with ethanol for three times, and then dry it in an oven at 75 °C for 6 h to obtain TiO 2 / HSBC;

[0039] d) Dissolve equal volumes in dimethyl sulfoxide solution according to the mass ratio o...

Embodiment 3

[0043] a) Cut the cannabis into small pieces (1.5mm~2mm) with a pulverizer, wash it with ethanol, dry it in a 50°C oven for 6 hours, take out the sample and place it in a tube furnace, and heat it up to 500°C under nitrogen protection, The biomass charcoal was obtained for 3 hours;

[0044] b) Soak 80 mg biomass charcoal in 60 mL glacial acetic acid, stir magnetically for 10 min to obtain a uniform suspension, 4 mL N,N,N',N'-tetramethyldiamine and 4 mL dimethyl sulfoxide are added to the suspension After fully dissolving in the liquid, slowly drop 4 mL of titanium isopropoxide into the suspension, and stir magnetically for 30 minutes to obtain a uniform suspension;

[0045] c) Transfer the homogeneous suspension to a suitable size reactor, conduct hydrothermal reaction at 120 °C for 12 h, filter with suction, wash with ethanol for three times, and then dry it in an oven at 75 °C for 6 h to obtain TiO 2 / HSBC;

[0046] d) Dissolve in an equal volume of dimethyl sulfoxide solu...

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Abstract

The invention belongs to the technical field of composite photocatalysts, and relates to biomass charcoal degradation of ammonia nitrogen, in particular to a self-assembling carbon nitride-TiO2 / hollowstructure biomass charcoal degradation ammonia nitrogen composite. The composite is composed of hollow structure biomass charcoal (HSBC), sheet carbon nitride and TiO2 microspheres of the grading structure, wherein the HSBC is formed by adopting biomass as raw materials through smashing and carbonization, and the hollow aperture is 10-50 micrometers; the sheet carbon nitride is formed by self-assembling, and the thickness is 100-200 nanometers; the grading structure TiO2 microspheres are obtained through hydrothermal in-situ growth, the diameter of the microspheres is 1-2 micrometers, and themicrospheres are composed of dense nano-rods. The invention further discloses a preparation method of the material. The preparation conditions are simple, the high specific surface area of the HSBC and the photocatalysis performance of TiO2 and carbon nitride are combined, and ammonia nitrogen can be rapidly removed. The composite is low in cost, stable, free of secondary contamination and environmentally friendly; ammonia nitrogen wastewater is removed through experiment simulation, and the removal rate under ultraviolet irradiation reaches up to 90.3%.

Description

technical field [0001] The invention belongs to the technical field of composite photocatalysts, relates to the degradation of ammonia nitrogen by biomass carbon, and particularly relates to a self-assembled carbon nitride-TiO 2 / Hollow structure biomass carbon degradation ammonia nitrogen composite material and preparation method thereof. Background technique [0002] In recent years, due to excessive fertilization and unreasonable use of pesticides, a large amount of nitrogen has been input into rivers, rivers and lakes, resulting in increasingly poor water environment, especially water eutrophication has become more and more serious, destroying the ecological balance of water bodies. Ammonia nitrogen treatment methods are generally divided into physical methods, biological methods and chemical methods. At present, for low-concentration ammonia nitrogen, it is more common to use biological treatment, but under the condition of high-pollution ammonia nitrogen concentration...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/32C02F1/72C02F101/16
CPCC02F1/32C02F1/725B01J27/24C02F2305/10C02F2305/023C02F2101/16B01J35/23B01J35/39
Inventor 戴红玲王艺罗文栋胡锋平彭小明胡玉瑛王敏
Owner EAST CHINA JIAOTONG UNIVERSITY
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