Magnetic cobalt loaded ordered mesoporous carbon, its preparation method and application

A mesoporous carbon and ordered mesoporous technology, which is applied in the field of magnetic cobalt-loaded ordered mesoporous carbon and its preparation, can solve the problems of enhancing the adsorption effect of nanoparticles, producing non-magnetic substances, and harsh synthesis conditions, etc. The cycle can be recycled, the treatment cycle is short, and the effect of stable physical and chemical properties

Inactive Publication Date: 2014-02-26
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Ordered mesoporous carbon has large specific surface area, pore volume, high hydrothermal stability and unique physicochemical properties, however, due to the inherent Agglomeration and the adsorption of nanoparticles on the outer surface or pores of mesoporous carbon after loading, resulting in pore blockage, and the enhancement of the adsorption effect of nanoparticles is therefore limited to a certain extent
[0005] In addition, the synthesis of magnetically ordered mesoporous carbon is subject to many restrictions, such as complex synthesis steps and the use of highly toxic substances in the synthesis process, Liu et al. (Ningning Liu, Ferromagnetic Ni decorated ordered mesoporous carbons as magnetically separable adsorbents for methyl orange, Materials Chemistry and Physics, 2011.131.) pointed out that the preparation of cobalt-loaded ordered mesoporous carbons requires the use of highly toxic substances Co2(CO) 8, this method is not only cumbersome, but also has certain toxicity to the human body, or it is easy to produce non-magnetic substances due to harsh synthesis conditions (such as the synthesis process of ordered mesoporous carbon loaded with iron produces α-Fe2O3 nanoparticles, which lead to non-magnetic properties)
Moreover, in the prior art, magnetically loaded cobalt-loaded ordered mesoporous carbon is mostly used in the field of battery preparation, and has not been applied to the process of wastewater treatment.

Method used

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  • Magnetic cobalt loaded ordered mesoporous carbon, its preparation method and application
  • Magnetic cobalt loaded ordered mesoporous carbon, its preparation method and application
  • Magnetic cobalt loaded ordered mesoporous carbon, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Example 1 : Preparation method of magnetically loaded cobalt ordered mesoporous carbon.

[0037] 1. The preparation of mesoporous silicon template SBA-15 comprises the following steps:

[0038] Measure 42mL of hydrochloric acid with a mass fraction of 36% and dissolve it in 270mL of water to prepare a hydrochloric acid solution. Stir in the medium until dissolved, then add 17g of ethyl orthosilicate dropwise to obtain a mixed solution, mix and stir the mixed solution at 35°C for 20 hours, then transfer the mixed solution to a reaction kettle, and conduct a hydrothermal reaction at 140°C for 24 hours. A white precipitate was obtained; the white precipitate was washed to neutrality, filtered, and dried at room temperature to obtain a white powder; the white powder was calcined at 550° C. for 4 h, and the heating rate was 1° C. / min. After grinding, the mesoporous silicon SBA- 15 templates; the molar ratio of the above-mentioned ethyl orthosilicate, P123 and hydrochloric...

Embodiment 2

[0047] Example 2 : Preparation method of magnetically loaded cobalt ordered mesoporous carbon.

[0048] 1. The preparation of the mesoporous silicon template SBA-15 comprises the following steps: consistent with step 1 of Example 1;

[0049] 2. The preparation of ordered mesoporous carbon (OMC) includes the following steps: consistent with step 2 of Example 1;

[0050] 3. The preparation of magnetically loaded cobalt ordered mesoporous carbon comprises the following steps:

[0051] Dissolve 0.6g ordered mesoporous carbon in 0.3g Co(NO 3 ) 2 ·6H 2 In the mixed solution of O and 19mL ethanol, the density of ethanol is 0.79g / ml, after stirring evenly, dry it in a vacuum oven at 60°C, and then put it under N 2 Calcined at 500° C. for 4 h under atmosphere with a heating rate of 2° C. / min to obtain magnetically loaded cobalt-supported ordered mesoporous carbon.

Embodiment 3

[0052] Example 3: Application of magnetically supported cobalt-supported ordered mesoporous carbon in the treatment of rhodamine B aqueous solution.

[0053] Prepare 8 groups of 10mL aqueous solutions containing rhodamine B with a concentration of 100mg / L, and adjust the pH values ​​to 2, 3, 4, 5, 6, 7, 8 and 9, respectively, and add 3mg of magnetically loaded cobalt ordered mesoporous carbon , after oscillating and adsorbing at room temperature and 150 rpm for 3 h, centrifugation for 5 min to complete the adsorption. Then utilize the ultraviolet spectrophotometer to measure the content of remaining rhodamine B in the solution, and calculate the removal rate of magnetically loaded cobalt ordered mesoporous carbon to rhodamine B, the experimental results are as follows Figure 5 shown.

[0054] Depend on Figure 5 It can be seen that the removal rate of rhodamine B by the magnetic cobalt-loaded ordered mesoporous carbon of the present invention gradually increases with the ...

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Abstract

The invention discloses a magnetic cobalt loaded ordered mesoporous carbon, which takes ordered mesoporous carbon as a carrier. The magnetic nanoparticles on the ordered mesoporous carbon are loaded by post-impregnation, the surface of the ordered mesoporous carbon and the inside and outside of pore paths are embedded with magnetic nanoparticles, which are mainly oxides of cobalt. The invention also discloses a preparation method of the magnetic cobalt loaded ordered mesoporous carbon. The method comprises the steps of: using ethanol as a solvent, mixing a cobalt source with ethanol and dissolving them completely to obtain a mixed solution, then adding ordered mesoporous carbon, mixing and stirring them uniformly, conducting drying and high-temperature calcination, thus obtaining the magnetic cobalt loaded ordered mesoporous carbon. The invention also relates to application of the magnetic cobalt loaded ordered mesoporous carbon prepared by the method in removal of rhodamine B from water. The material prepared by the invention has the advantages of large specific surface area and pore volume, wide application range, stable physicochemical properties, simple and feasible preparation method, and can effectively remove rhodamine B from water.

Description

technical field [0001] The invention relates to a mesoporous material, a preparation method thereof, and an application in the field of wastewater treatment, in particular to a magnetically loaded cobalt-loaded ordered mesoporous carbon, a preparation method thereof, and an application for treating rhodamine B wastewater. Background technique [0002] Rhodamine B is usually used in industrial dyeing such as fiber, paper, leather, etc., and in chemical or biological laboratories for chemical analysis. Therefore, long-term discharge of waste water containing rhodamine B in industrial production such as textile, printing and dyeing, paper making, leather making and laboratories has caused pollution to water bodies with high toxicity, carcinogenicity and water solubility. Rhodamine B is easy to degrade under light conditions to form intermediate products such as aromatic amines, which seriously endangers the normal metabolism of aquatic organisms and has a huge impact on water q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/38
Inventor 汤琳蔡叶曾光明杨贵德魏雪刘媛媛周耀渝王佳佳张盛陈俊方艳
Owner HUNAN UNIV
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