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Preparation method of nitrogen-sulfur double-doped biochar material for degrading phenol in water

A dual-doping, biochar technology, used in carbon preparation/purification, water pollutants, chemical instruments and methods, etc., can solve problems such as metal ion leaching, achieve more active sites, speed up degradation efficiency, specific surface area big effect

Inactive Publication Date: 2021-02-05
CHINA TOBACCO JIANGSU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activation methods include UV activation and heat activation; Co 2+ Activation by other metal ions; MnO 2 and Co 3 o 4 These methods require energy input, chemical input, or secondary pollution such as metal ion leaching.

Method used

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  • Preparation method of nitrogen-sulfur double-doped biochar material for degrading phenol in water
  • Preparation method of nitrogen-sulfur double-doped biochar material for degrading phenol in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Clean the discarded fireworks five times with ultra-pure water to remove surface impurities, and then dry them in a vacuum drying oven to obtain clean fireworks buds;

[0033] Shred the clean fireworks buds, grind them, and sieve them through a 40-mesh sieve to obtain gray-brown fireworks powder. Mix 1 g of the gray-brown fireworks powder with 1 g of thiourea and grind them with a ball mill to obtain a mixture;

[0034] The mixture was calcined in a tube furnace under the protection of nitrogen, the calcination temperature was 300° C., and the calcination time was 1 h. Then the calcined product was washed with ultrapure water and ethanol, and transferred to a vacuum drying oven. After drying at 80°C for 36 hours, the nitrogen-sulfur double-doped biochar material can be obtained by drying.

Embodiment 2

[0036] Clean the discarded fireworks five times with ultra-pure water to remove surface impurities, and then dry them in a vacuum drying oven to obtain clean fireworks buds;

[0037] Shred the clean fireworks buds, grind them, and sieve them through a 40-mesh sieve to obtain gray-brown fireworks powder. Mix 1 g of the gray-brown fireworks powder with 1 g of thiourea and grind them with a ball mill to obtain a mixture;

[0038] The mixture was calcined in a tube furnace under the protection of nitrogen, the calcination temperature was 400° C., and the calcination time was 1 h. Then the calcined product was cleaned with ultrapure water and ethanol, and transferred to a vacuum drying oven. After drying at 80°C for 36 hours, the nitrogen-sulfur double-doped biochar material can be obtained by drying.

Embodiment 3

[0040] Clean the discarded fireworks five times with ultra-pure water to remove surface impurities, and then dry them in a vacuum drying oven to obtain clean fireworks buds;

[0041] Shred the clean fireworks buds, grind them, and sieve them through a 40-mesh sieve to obtain gray-brown fireworks powder. Mix 1 g of the gray-brown fireworks powder with 1 g of thiourea and grind them with a ball mill to obtain a mixture;

[0042] The mixture was calcined in a tube furnace under the protection of nitrogen, the calcining temperature was 500° C., and the calcining time was 1 h. Then the calcined product was washed with ultrapure water and ethanol, and transferred to a vacuum drying oven. After drying at 80°C for 36 hours, the nitrogen-sulfur double-doped biochar material can be obtained by drying.

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Abstract

The invention discloses a preparation method of a nitrogen-sulfur double-doped biochar material for degrading phenol in water, which comprises the following steps: S1, cleaning waste fireworks with ultrapure water multiple times, and drying in a vacuum drying oven to obtain clean firework buds; s2, shredding, grinding and sieving the dried firework buds to obtain taupe firework powder, uniformly mixing the taupe firework powder with a certain amount of thiourea, and grinding by using a ball mill to obtain a mixture; and S3, calcining the mixture in a tubular furnace under the protection of inert gas, washing the calcined product with ultrapure water and ethanol, transferring the washed product into a vacuum drying oven, and drying to obtain the nitrogen-sulfur double-doped biochar material. The biochar material prepared by the method is of a porous structure, has a relatively large specific surface area, and is beneficial to adsorption of peroxymonosulfate on the surface of the material, so that target molecules are relatively easy to approach active sites to generate catalytic reaction.

Description

technical field [0001] The invention relates to the field of biochar material modification, in particular to a method for preparing a nitrogen-sulfur double-doped biochar material used for degrading phenol in water. Background technique [0002] Phenol is an organic compound with the chemical formula C 6 h 5 OH is a colorless needle-like crystal with a special smell. Its melting point is 43°C. It is slightly soluble in water at room temperature and easily soluble in organic solvents. When the temperature is higher than 65°C, it can be miscible with water in any proportion. Phenol is an important raw material for the production of certain resins, fungicides, preservatives, and pharmaceuticals such as aspirin. It can also be used for disinfection of surgical instruments and treatment of excrement, skin sterilization, antipruritic and otitis media. Moreover, as an important chemical intermediate, phenol is widely used in the production fields of dyes, pesticides and pharmace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08B09B3/00C01B32/05C02F1/72C02F101/34
CPCB01J27/24B01J37/084B09B3/00C01B32/05C02F1/725C02F1/722C02F2101/345
Inventor 李炜吴洋张钺刘梦梦袁益来
Owner CHINA TOBACCO JIANGSU INDAL
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