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Zirconia-modified graphene and method for removing fluorine ions in water

A technology of graphene and zirconia, applied in separation methods, chemical instruments and methods, combustible gas purification/transformation, etc., can solve the problems of reducing the effectiveness of zirconia, uneven zirconia, etc., and achieve good economic and environmental benefits, Efficient adsorption capacity, easy regeneration and recycling effect

Inactive Publication Date: 2014-06-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the adsorption materials loaded with zirconia are precipitated or hydrothermally reacted to form uneven zirconia on the surface of the carrier, which greatly reduces the effectiveness of zirconia.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Mix 3g graphite powder with 2g NaNO 3 After adding to concentrated sulfuric acid (98%), mix uniformly under the condition of keeping the temperature at 1°C to obtain mixture A, add 8g KMnO 4 Then stir at room temperature for 18 hours to obtain mixture B, add 90 mL of water to mixture B, heat and stir for 30 minutes under the condition of controlling the temperature equal to 80°C to obtain mixture C, after mixture C is cooled to room temperature, add 30 mL of 30% H to mixture C 2 o 2 Stir continuously, and then filter to obtain a filter residue. The filter residue is washed repeatedly with 5% hydrochloric acid and distilled water to neutrality, and then vacuum-dried at 40°C to obtain graphite oxide (GO).

[0031] 2) Ultrasonic disperse graphite oxide in water to obtain mixture D, add 80% hydrazine hydrate to mixture D according to the mass ratio of graphite oxide:80% hydrazine hydrate = 10:8, and then stir in a water bath at 50°C for 100 minutes to obtain a reaction ...

Embodiment 2

[0034] 1) Mix 5g graphite powder with 2.5g NaNO 3 After adding to concentrated sulfuric acid (98%), mix uniformly under the condition of keeping the temperature at 3°C ​​to obtain mixture A, add 15g KMnO 4 After that, stir at room temperature for 24 hours to obtain mixture B, add 150 mL of water to mixture B and heat and stir for 75 minutes under the condition that the temperature is equal to 70°C to obtain mixture C, after mixture C is cooled to room temperature, add 50 mL of 30% H to mixture C 2 o 2 Stir continuously, and then filter to obtain a filter residue. The filter residue is washed repeatedly with 5% hydrochloric acid and distilled water to neutrality, and then vacuum-dried at 60°C to obtain graphite oxide (GO).

[0035] 2) Ultrasonic disperse graphite oxide in water to obtain mixture D, add 80% hydrazine hydrate to mixture D according to the mass ratio of graphite oxide: 80% hydrazine hydrate = 10:7, and then stir in a water bath at 75°C for 55 minutes to obtain a ...

Embodiment 3

[0038] 1) Mix 1g graphite powder with 0.5g NaNO3 After adding to concentrated sulfuric acid (98%), mix uniformly under the condition of keeping the temperature at 5°C to obtain mixture A, add 3g KMnO 4 After that, stir at room temperature for 12 hours to obtain mixture B, add 50 mL of water to mixture B, heat and stir at a temperature equal to 60°C for 100 minutes to obtain mixture C, and add 40 mL of 30% H to mixture C after cooling to room temperature 2 o 2 Stir continuously, and then filter to obtain a filter residue. The filter residue is washed repeatedly with 5% hydrochloric acid and distilled water to neutrality, and then vacuum-dried at 50°C to obtain graphite oxide (GO).

[0039] 2) Ultrasonic disperse graphite oxide in water to obtain mixture D, add 80% hydrazine hydrate to mixture D according to the mass ratio of graphite oxide: 80% hydrazine hydrate = 10:10, and then stir in a water bath at 100°C for 30 minutes to obtain a reaction solution , after the reaction so...

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PUM

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Abstract

The invention provides zirconia-modified graphene and a method for removing fluorine ions in water. A preparation method of the zirconia-modified graphene comprises the following steps of dispersing graphene in a zirconium oxychloride water solution, heating, stirring, filtering to obtain a reaction product, washing and drying the reaction product to obtain the zirconia-modified graphene. Through zirconia modification, the advantages of acid and alkali resistance, large specific surface area and the like of graphene materials are maintained and the efficient adsorption capacity of zirconium oxide to the fluorine ions is fully utilized; when serving as an adsorbent to remove the fluorine ions in the water, the zirconia-modified graphene is simple to operate, strong in adsorption capacity, remarkable in removing effect, easy in regeneration recycling and good in economic and environmental benefits and is an adsorbent with a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of purification of fluorine ions in water, and in particular relates to the synthesis of zirconia-modified graphene and the use of zirconia-modified graphene to remove fluorine ions in water. Background technique [0002] Fluorine is one of the essential trace elements for the human body, and an appropriate amount of fluorine is essential for maintaining the development of bones and teeth. Drinking water with low fluoride content for a long time will cause dental caries; on the contrary, drinking water with high fluoride content for a long time will lead to fluorosis, dental fluorosis, bone fluorosis, thyroid damage and kidney damage and other diseases. have a serious impact on the environment. Therefore, effectively controlling and removing fluorine in water is an important issue related to the environment and human beings. [0003] At present, the commonly used defluorination methods at home and abroad m...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01J20/34C02F1/28C02F1/58
Inventor 王家宏陈浩
Owner SHAANXI UNIV OF SCI & TECH
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