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Carbon-based adsorbent and preparation method thereof

An adsorbent, carbon-based technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of poor adsorption performance, single element type, etc., achieve easy recovery, wide pH range, The effect of excellent adsorption activity

Inactive Publication Date: 2021-01-01
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Carbon-based adsorbents doped with nitrogen, phosphorus, and sulfur have rarely been reported in the literature in recent years, and no relevant patents have been published on carbon-based adsorbents doped with nitrogen, phosphorus, and sulfur.
Moreover, in the existing reports, carbon-based nanomaterials have disadvantages such as single element types and poor adsorption performance.

Method used

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  • Carbon-based adsorbent and preparation method thereof
  • Carbon-based adsorbent and preparation method thereof
  • Carbon-based adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 100mg SiO 2 Evenly dispersed in 100mL of methanol, ultrasonic 10min. Dissolve 300mg of hexachlorotripolyphosphazene and 600mg of bisphenol S in 10mL of methanol solution, add dropwise to the ultrasonically dispersed silica suspension, and stir for 5 minutes; add 0.6mL of triethylamine dropwise to the above suspension, and stir 1 hour. The resulting product was washed three times with methanol and dried under vacuum at 60°C. The obtained product was carbonized at 400° C. under an argon atmosphere at a heating rate of 2° C. / min. Then, it was etched in 0.5 mol / L sodium hydroxide solution for 2 hours, and the product was washed with desalted water until neutral, and dried in vacuum at 60°C.

[0038] Such as figure 1 , figure 2 As shown, after removing the silica template by etching, it can be clearly seen that the adsorbent presents a three-dimensional inverse opal-type framework structure. image 3 It is the X-ray photoelectron spectroscopy (XPS) analysis of the ads...

Embodiment 2

[0042] 200mg SiO 2 Evenly dispersed in 100mL ethanol, ultrasonic 15min. Dissolve 300mg of hexachlorotripolyphosphazene and 1000mg of bisphenol S in 50mL of methanol solution, add dropwise to the ultrasonically dispersed silica suspension, and stir for 10min; add 0.9mL of triethylamine dropwise to the above suspension, and stir 3 hours. The resulting product was washed three times with methanol and dried under vacuum at 60°C. The obtained product was carbonized at 500° C. under an argon atmosphere at a heating rate of 3° C. / min. Then, it was etched in 5.0 mol / L sodium hydroxide solution for 6 hours, and the product was washed with desalted water until it was neutral, and dried in vacuum at 60°C.

Embodiment 3

[0044] 300mg SiO 2 Evenly dispersed in 100mL of methanol, ultrasonic 20min. Dissolve 300mg of hexachlorotripolyphosphazene and 1500mg of bisphenol S in 100mL of methanol solution, add dropwise the ultrasonically dispersed silica suspension, and stir for 15 minutes; add 1.2mL of triethylamine dropwise to the above suspension, and stir 5 hours. The resulting product was washed three times with methanol and dried under vacuum at 60°C. The obtained product was carbonized at 600° C. under a nitrogen atmosphere at a heating rate of 5° C. / min. Then, it was etched in 0.5 mol / L potassium hydroxide solution for 10 hours, and the product was washed with desalted water to neutrality, and dried in vacuum at 60°C.

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Abstract

The invention discloses a nitrogen, phosphorus and sulfur heteroatom co-doped carbon-based adsorbent. The adsorbent adopts silica as the template, with the assistance of triethylamine, hexachlorotriphosphazene and bisphenol S polymerize into highly crosslinked polycyclotriphosphazene-4, 4'-dihydroxy diphenyl sulfone. By means of a carbonization process in an inert atmosphere, a nitrogen, phosphorus and sulfur heteroatom co-doped carbon-based material can be formed, wherein the carbon content is 85-90%, the oxygen content is 8.0-11%, the nitrogen content is 1.0-2.0%, the phosphorus content is 0.5-1.0%, and the sulfur content is 0.5-1.0%. The adsorbent has good adsorption activity on radionuclides, organic pollutants and other harmful substances in a water environment like uranyl, methyleneblue, bisphenol A, etc., also has the characteristics of wide application pH range, low cost, environmental friendliness, easy recovery and reusability, thus having good application prospects.

Description

technical field [0001] The invention relates to the technical field of environmental functional materials and water treatment, in particular to the adsorption of radionuclides and organic pollutants in water bodies. Background technique [0002] The mass transfer and adsorption process at the solid-liquid interface is a crucial step in the treatment of water pollutants. The progress of the adsorption process determines the load of the subsequent water treatment process. Stable and efficient adsorption performance can effectively relieve the pressure of the subsequent process, improve the overall process efficiency, and extend the life of the equipment. The mineralization and degradation process of radionuclides and organic matter in water strongly depends on the speed of mass transfer in the adsorption process, which in turn affects the entire process mechanism. Therefore, the performance of the adsorbent directly determines the speed and mechanism of the adsorption of harm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/30
CPCB01J20/02B01J20/20B01J20/3078B01J20/3085C02F1/283C02F2101/006C02F2101/30
Inventor 陈哲王祥科王维雪
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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