A kind of reduced graphene oxide/nano zirconia composite adsorption dephosphorization agent and its preparation method

A nano-zirconia, composite adsorption technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of secondary water pollution, low phosphorus removal efficiency, poor sedimentation, etc. Adsorption capacity, high adsorption efficiency, effect of preventing agglomeration

Active Publication Date: 2017-12-22
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, zirconia has poor settling properties and is difficult to recycle. Single use to remove phosphorus will cause secondary pollution to water bodies
Graphene oxide material has a high specific surface area, good stability, corrosion resistance, oxidation resistance, high temperature and low temperature resistance, non-toxic, and will not cause secondary pollution. The carbonyl, hydroxyl, epoxy and other functional groups on the surface The group provides metal active adsorption sites and is easy to modify, but its phosphorus removal efficiency is low

Method used

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  • A kind of reduced graphene oxide/nano zirconia composite adsorption dephosphorization agent and its preparation method
  • A kind of reduced graphene oxide/nano zirconia composite adsorption dephosphorization agent and its preparation method
  • A kind of reduced graphene oxide/nano zirconia composite adsorption dephosphorization agent and its preparation method

Examples

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Embodiment 1

[0050] A reduced graphene oxide / nano zirconium dioxide composite adsorption dephosphorization agent, which is made of the following raw materials in parts by weight:

[0051] Raw material parts by weight

[0052] Graphene oxide 2

[0053] Nano Zirconium Dioxide 2.

[0054] A preparation method of reduced graphene oxide / nano zirconium dioxide composite adsorption dephosphorization agent, the steps are:

[0055] a. Prepare graphene oxide from graphite powder: Weigh 6g of graphite powder and place it in a dry beaker, then add 24mL of 98% concentrated sulfuric acid, stir in a water bath at 80°C, then slowly add 5g of potassium persulfate and 5g of phosphorus pentoxide in sequence , after continuous stirring for 5 h, cooled to room temperature, added 1 L of deionized water for dilution, and left overnight. Filter the powder with a 0.2 micron microporous membrane, wash with deionized water three to five times until the solution becomes neutral, and dry the powder at 70°C. Transf...

Embodiment 2

[0058] A reduced graphene oxide / nano zirconium dioxide composite adsorption dephosphorization agent, which is made of the following raw materials in parts by weight:

[0059] Raw material parts by weight

[0060] Graphene Oxide 3

[0061] Nano Zirconium Dioxide 4.

[0062] A preparation method of reduced graphene oxide / nano zirconium dioxide composite adsorption dephosphorization agent, the steps are:

[0063] a. graphene oxide preparation method is identical with embodiment 1.

[0064] b. Preparation of reduced graphene oxide / nano-zirconia composite material: ultrasonically disperse the prepared graphene oxide in deionized water to prepare a 1 g / L graphene oxide dispersion. Add 0.02 g nanometer zirconia to 15 mL of 1 g / L graphene oxide solution, stir for 2 h, transfer the suspension to a 100 mL hydrothermal kettle, and let it react at 150 °C for 5-6 h. The obtained solid was washed 3-4 times with deionized water, and dried in a vacuum drying oven at 60°C for 12 hours. The...

Embodiment 3

[0066] A reduced graphene oxide / nano zirconium dioxide composite adsorption dephosphorization agent, which is made of the following raw materials in parts by weight:

[0067] Raw material parts by weight

[0068] Graphene oxide 5

[0069] Nano Zirconium Dioxide 6.

[0070] A preparation method of reduced graphene oxide / nano zirconium dioxide composite adsorption dephosphorization agent, the steps are:

[0071] a. graphene oxide preparation method is identical with embodiment 1.

[0072] b. Preparation of reduced graphene oxide / nano-zirconia composite material: ultrasonically disperse the prepared graphene oxide in deionized water to prepare a 1 g / L graphene oxide dispersion. Add 0.06 g nanometer zirconia to 25 mL of 1 g / L graphene oxide solution, stir for 2 h, transfer the suspension to a 100 mL hydrothermal kettle, and let it react at 150 °C for 5-6 h. The obtained solid was washed 3-4 times with deionized water, and dried in a vacuum drying oven at 60°C for 12 hours. The...

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Abstract

The invention discloses a reduced graphene oxide / nano zirconium dioxide composite adsorption phosphorous removing agent and a preparation method thereof. The reduced graphene oxide / nano zirconium dioxide composite adsorption phosphorous removing agent consists of graphene oxide and nano zirconium dioxide in a certain ratio. The method comprises the following steps of a. preparing graphene oxide from graphite powder, i.e., weighing out graphene powder, placing the graphene powder into a dry beaker, adding concentrated sulfuric acid, potassium persulfate and phosphorous pentoxide, then adding potassium permanganate and hydrogen peroxide, and subjecting an obtained solution to centrifugation, washing with diluted hydrochloric acid, and drying, thereby obtaining solid graphene oxide powder; b. preparing a reduced graphene oxide / nano zirconium dioxide composite material, i.e., ultrasonically dispersing the prepared graphene oxide into deionized water, adding nano zirconium dioxide, transferring suspension liquid into a hydrothermal kettle for reaction, and washing an obtained solid by using deionized water, thereby obtaining a product which is the reduced graphene oxide / nano zirconium dioxide composite material; and c. using the reduced graphene oxide / nano zirconium dioxide composite material to adsorb phosphorous. According to the invention, the reduced graphene oxide / nano zirconium dioxide composite adsorption phosphorous removing agent has a large adsorption capability, is high in adsorption speed, and can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanocomposite materials, and more specifically relates to a reduced graphene oxide / nano zirconia composite adsorption dephosphorization agent, and also relates to a reduced graphene oxide / nano zirconia composite adsorption dephosphorization agent. The preparation method is applicable to the field of phosphorus removal and purification of waste water. Background technique [0002] With the rapid economic development and increasing human activities, a large amount of domestic sewage, industrial and agricultural wastewater containing nitrogen and phosphorus nutrients are discharged into rivers and lakes, exceeding the self-purification capacity of water bodies, resulting in increasingly serious eutrophication of water bodies. Eutrophication of water body will cause aquatic plants to proliferate, resulting in the decrease of dissolved oxygen in water body, thus leading to deterioration of water qual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58
Inventor 方涛鲍少攀王秀荣罗鑫
Owner INST OF AQUATIC LIFE ACAD SINICA
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