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Zinc oxide/cotton stalk biomass carbon composite material, and preparation method and application thereof

A technology of biomass carbon and composite materials, applied in the field of composite materials, can solve problems such as environmental pollution and resource waste, and achieve the effects of improving catalytic efficiency, improving utilization rate and reducing pollution

Inactive Publication Date: 2019-09-06
TARIM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, part of the cotton stalks are crushed and returned to the fields to replace coal for heating, and a large part is burned, which not only wastes resources, but also causes serious pollution to the environment

Method used

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  • Zinc oxide/cotton stalk biomass carbon composite material, and preparation method and application thereof
  • Zinc oxide/cotton stalk biomass carbon composite material, and preparation method and application thereof
  • Zinc oxide/cotton stalk biomass carbon composite material, and preparation method and application thereof

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preparation example Construction

[0032] The invention provides a method for preparing a zinc oxide / cotton stalk biochar composite material, comprising the following steps:

[0033] (1) mixing cotton stalks, activator and water, drying and calcining in sequence to obtain biochar;

[0034] (2) Mixing the biochar, concentrated sulfuric acid, potassium permanganate, hydrogen peroxide and water for oxidation reaction to obtain oxidized biochar;

[0035] (3) Mix the oxidized biomass charcoal and water for ultrasonic treatment, then mix with the zinc source solution, adjust the pH value of the mixed solution to alkaline, and then carry out coprecipitation reaction to obtain a composite material precursor;

[0036] (4) Calcining the composite material precursor to obtain a zinc oxide / cotton stalk biochar composite material.

[0037] The invention mixes cotton stalks, an activator and water, and sequentially performs drying and calcining to obtain biochar. Before mixing, in the present invention, the cotton stalks a...

Embodiment 1

[0051] (1) Crush and sieve the cotton stalks, take 5g of crushed cotton stalks and 2g of potassium hydroxide, put them in a 500mL beaker, add 100mL of distilled water, stir with a glass rod until the alkali is completely dissolved, and place in a blast dryer , the temperature was set at 100°C, and dried; the dried substance was taken out and put into a crucible, and calcined in a box-type electric furnace at 500°C for 4 hours; the calcined substance was rinsed with 1mol / L dilute hydrochloric acid, and filtered drying to obtain biochar;

[0052] (2) Take a 500mL beaker, add 50mL of concentrated sulfuric acid, then add 1g of biomass charcoal, 7g of potassium permanganate in turn, magnetically stir for 2 hours, then add 250mL of distilled water in turn under the condition of continuous stirring, 20mL of mass concentration to 30% hydrogen peroxide, stop stirring; take it out after standing for 12 hours, pour off the supernatant, wash with distilled water 3 times, strengthen the al...

Embodiment 2

[0056] The mass of the oxidized biochar in step (3) of Example 1 was changed to 0.05 g, and the rest of the operation methods were kept unchanged to obtain the zinc oxide / cotton stalk biochar composite material.

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Abstract

The invention provides a zinc oxide / cotton stalk biomass carbon composite material, and a preparation method and an application thereof, and belongs to the technical field of composite materials. Oxidized biomass carbon is obtained by a chemical activation and oxidation process by using concentrated sulfuric acid, potassium permanganate and hydrogen peroxide as oxidants; and a zinc source and theoxidized biomass carbon undergo chemical coprecipitation under an alkaline condition, and then high-temperature thermal decomposition is carried out to prepare the zinc oxide / cotton stalk biomass carbon composite. The method can load the easily-agglomerated zinc oxide onto the surface of the biomass carbon having a large specific surface area, so the agglomeration of the metal oxide is effectivelycontrolled, the utilization rate of the metal oxide is increased, the excellent electron conduction ability of the biomass carbon is exerted, recombination of photogenerated electrons and holes can be effectively slowed down in the photocatalytic process, and the catalytic efficiency is improved. Results of embodiments in the invention show that the degradation rate of methyl orange can reach 99.83% when the composite material is used for photocatalytic degradation of methyl orange.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a zinc oxide / cotton stalk biochar composite material and its preparation method and application. Background technique [0002] With the rapid development of the dye industry, a large number of organic dyes are directly discharged into water bodies to form dye wastewater. Organic dyes are mainly divided into anionic dyes, cationic dyes and nonionic dyes. The chromophores in anionic and nonionic dyes are mainly azo groups or anthraquinone groups. Compared with other dyes, azo dyes are widely used because of their advantages such as simple synthesis method, variable structure, low cost, pleochroism, and strong stability, accounting for 65-70% of the total dyes produced. [0003] Methyl orange (Methy Orange, MO) is a widely used azo dye, also known as golden lotus orange D, its molecular formula is C 14 h 14 N 3 SO 3 Na, which is formed by coupling p-aminobenzenesul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J35/10B01J37/34B01J37/08B01J37/12B01J37/03C02F1/72C02F101/30C02F101/34C02F101/38
CPCB01J23/06B01J37/343B01J37/084B01J37/12B01J37/03C02F1/725C02F2101/308C02F2101/34C02F2101/38C02F2101/40C02F2305/10B01J35/61B01J35/39
Inventor 梁鹏举穆金城姜建辉汪河滨胡孝慧
Owner TARIM UNIV
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