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Preparation method of C@SiO2 hollow sphere for adsorbing and removing Cr(VI)

A hollow sphere, vacuum drying technology, applied in the fields of adsorption water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of uneven dispersion, difficult to control morphology, etc., and achieves simple preparation process and low price. , the effect of high mechanical strength

Inactive Publication Date: 2017-06-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method will SiO 2 Dispersed in starch sol and then carbonized, there are problems such as uneven dispersion and difficult control of morphology

Method used

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  • Preparation method of C@SiO2 hollow sphere for adsorbing and removing Cr(VI)
  • Preparation method of C@SiO2 hollow sphere for adsorbing and removing Cr(VI)
  • Preparation method of C@SiO2 hollow sphere for adsorbing and removing Cr(VI)

Examples

Experimental program
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Effect test

Embodiment 1

[0032]Dissolve 6g of glucose and 0.05g of SDS into 40mL of water at room temperature, stir thoroughly for 30min, then transfer to a reaction kettle, undergo a hydrothermal reaction at 180°C for 8h, filter the brown suspension obtained after cooling, and wash alternately with water and ethanol three times , and finally dried under vacuum at 60° C. for 12 hours to obtain C hollow sphere powder.

[0033] Add the above 0.1g C hollow sphere powder into 60mL of absolute ethanol, stir at room temperature for 30min, then add 1.2mL of ammonia water with a volume concentration of 25%, and at the same time add 80mL of 0.01mol / L CTAB solution, and stir at room temperature for 6h Finally, 0.1 mL of TEOS was added dropwise, and the stirring reaction was continued for 6 h; finally, the product was filtered, washed alternately with water and ethanol three times, and the filter cake was dried under vacuum at 60 °C for 12 h to obtain C@SiO 2 Hollow spherical powder.

[0034] When adsorbing 100...

Embodiment 2

[0037] Dissolve 6g of glucose and 0.05g of SDS into 40mL of water at room temperature, stir thoroughly for 30min, then transfer to a reaction kettle, undergo a hydrothermal reaction at 180°C for 8h, filter the brown suspension obtained after cooling, and wash alternately with water and ethanol three times , and finally dried under vacuum at 60° C. for 12 hours to obtain C hollow sphere powder.

[0038] Add the above 0.1g C hollow sphere powder into 60mL of absolute ethanol, stir at room temperature for 30min, then add 1.2mL of ammonia water with a volume concentration of 25%, and at the same time add 80mL of 0.015mol / L CTAB solution, and stir at room temperature for 6h Finally, 0.1 mL of TEOS was added dropwise, and the stirring reaction was continued for 6 h; finally, the product was filtered, washed alternately with water and ethanol three times, and the filter cake was dried under vacuum at 60 °C for 12 h to obtain C@SiO 2 Hollow spherical powder.

[0039] When adsorbing 1...

Embodiment 3

[0042] Dissolve 6g of glucose and 0.05g of SDS into 40mL of water at room temperature, stir thoroughly for 30min, then transfer to a reaction kettle, undergo a hydrothermal reaction at 180°C for 8h, filter the brown suspension obtained after cooling, and wash alternately with water and ethanol three times , and finally dried under vacuum at 60° C. for 12 hours to obtain C hollow sphere powder.

[0043] Add the above 0.1g C hollow sphere powder into 60mL of absolute ethanol, stir at room temperature for 30min, then add 1.2mL of ammonia water with a volume concentration of 25%, and at the same time add 80mL of 0.005mol / L CTAB solution, and stir at room temperature for 6h Finally, 1 mL of TEOS was added dropwise, and the reaction was continued for 6 h. Finally, the product was filtered and washed alternately with water and ethanol three times, and the filter cake was dried under vacuum at 60 °C for 12 h to obtain C@SiO 2 Hollow spherical powder.

[0044] When adsorbing 100mL, 10...

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Abstract

The invention provides a preparation method of a C@SiO2 hollow sphere for adsorbing and removing Cr(VI). The preparation method specifically comprises the following steps: firstly, carrying out hydrothermal carbonization on glucose to form C hollow sphere powder; secondly, dispersing the powder into an alkaline ethanol and water mixed solution containing a surfactant cetyl trimethyl ammonium bromide; furthermore, adding tetraethyl orthosilicate; after sufficiently hydrolyzing and reacting, filtering a product, washing and drying in vacuum in sequence to prepare C@SiO2 hollow sphere powder. Compared with C hollow sphere powder with a single component, the adsorption amount and adsorption speed of the prepared C@SiO2 hollow sphere on the toxic Cr(VI) in wastewater are greatly improved; after the C@SiO2 hollow sphere is circularly used for 5 times, the adsorption amount on the Cr(VI) is 81.0 percent of an initial adsorption amount; an adsorbent has a good selective adsorption capability on the Cr(VI) in a mixed solution of the Cr(VI), Cd(II), Zn(II) and Ni(II) and the selective adsorption rate reaches 90.8 percent.

Description

technical field [0001] The invention relates to the development of an inorganic environment-friendly purification composite material. Specifically, it is a C@SiO for adsorption and removal of Cr(VI) in wastewater 2 The preparation method of the hollow spherical powder adsorbent. Background technique [0002] Heavy metal Cr(VI) pollutants, as one of the eight most harmful chemical substances to the human body, have strong carcinogenic and teratogenic properties. All countries in the world generally list Cr(VI) pollution as a key prevention and control object, and the chromium salt industry in my country has long been listed as the first serious polluting industry. In recent years, there have been many serious water pollution incidents caused by improper treatment of heavy metal Cr(VI)-containing wastewater, which have seriously affected people's health. Therefore, how to deal with Cr(VI)-containing wastewater reasonably and effectively has attracted the attention of the so...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/103B01J20/20B01J20/28021C02F1/281C02F2101/22
Inventor 蔡卫权古蒙蒙
Owner WUHAN UNIV OF TECH
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