CN111644150A - Preparation method of phosphate adsorbent based on 3D rGO/zirconium dioxide composite material - Google Patents

Abstract

The invention discloses a preparation method of a 3D rGO/zirconium dioxide composite-based phosphate adsorbent. ZrOCl₂·8H₂After the O and glutamic acid were dissolved uniformly, they were mixed with the GO dispersion. Transferring the mixed solution into a polytetrafluoroethylene reaction kettle for hydrothermal reaction, washing and drying the reacted material to obtain a final product 3D rGO/ZrO₂. The invention has the advantages that: 1. the prepared product has regular appearance and a three-dimensional structure; 2. the prepared product has high-efficiency phosphate radical adsorption performance; 3. simple material preparation, low cost and suitability for large areaAnd (5) popularization and application.

Description

Preparation method of phosphate adsorbent based on 3D rGO/zirconium dioxide composite material

Technical Field

The invention relates to a preparation method of a phosphate adsorbent based on a 3D rGO/zirconium dioxide composite material, belonging to the field of environmental pollutant treatment.

Background

Phosphorus (P) is widely used in agriculture and industry as an important resource and material. However, excessive phosphate content in water can promote rapid growth of algae species, some of which are toxic, which can lead to imbalance of organisms in the water. When the algae material begins to decay, the dissolved oxygen capacity of the water is rapidly reduced, which can lead to the death of a large number of fish and other aquatic organisms. Therefore, phosphorus has a great influence on lakes, rivers, and oceans, on which people live. Effectively controlling the content of phosphorus in water, removing excessive phosphorus, developing novel and efficient phosphorus removal materials and technologies, and being vital to environmental protection.

Disclosure of Invention

The invention aims to provide a preparation method of a phosphate adsorbent based on a 3D rGO/zirconium dioxide composite material.

The invention adopts the following means:

(1) GO was prepared in a conventionally reported method. And deionized water is used for preparing 3mg/mL dispersion liquid according to the requirement;

(2) ZrOCl₂·8H₂Dissolving O and 50mg glutamic acid in 1mL deionized water, and performing ultrasonic treatment for 10min to obtain ZrOCl₂·8H₂The amount of O is 30-60 mg;

(3) mixing the mixed solution obtained in the step (2) with 3mL of 3mg/L GO dispersion solution, and then carrying out hydrothermal reaction at 180 ℃ for 6 h;

(4) collecting the reacted product, washing and drying to obtain the final product 3D rGO/ZrO₂。

The invention has the advantages that:

1. the prepared product has regular appearance and a three-dimensional structure;

2. the prepared product has high-efficiency phosphate radical adsorption performance;

3. the material is simple to prepare, low in cost and suitable for large-area popularization and application;

4. the product prepared by the method adopts an adsorption method to treat the phosphorus-containing wastewater, is simple to operate, does not produce secondary pollution, and is an environment-friendly treatment method.

Drawings

FIG. 1 is a scanning electron micrograph of a product according to example 1 of the present invention;

FIG. 2 is a FT-IR plot of the product of example 1 of the present invention;

FIG. 3 is a graph showing the adsorption isotherm of the product of example 1 of the present invention for adsorbing phosphate.

Detailed Description

Example 1

GO was prepared by conventional methods and was formulated with deionized water as required to a 3mg/mL dispersion.

50mg of ZrOCl₂·8H₂O and 50mg of glutamic acid were dissolved in 1mL of deionized water and sonicated for 10 min. The mixture and 5mL of 3mg/mL GO dispersion were added to 30mL of ethylene glycol with stirring. Transferring the mixed solution into a polytetrafluoroethylene reaction kettle, carrying out hydrothermal reaction at 180 ℃ for 6 hours, repeatedly washing the reacted material with deionized water for many times to remove impurities, and finally carrying out freeze drying to obtain a final product 3D rGO/ZrO₂。

Example 2

GO was prepared by conventional methods and was formulated with deionized water as required to a 3mg/mL dispersion.

30mg of ZrOCl₂·8H₂O and 50mg of glutamic acid were dissolved in 1mL of deionized water and sonicated for 10 min. The mixture and 5mL of 3mg/mL GO dispersion were added to 30mL of ethylene glycol with stirring. Transferring the mixed solution into a polytetrafluoroethylene reaction kettle, carrying out hydrothermal reaction at 180 ℃ for 6 hours, repeatedly washing the reacted material with deionized water for many times to remove impurities, and finally carrying out freeze drying to obtain a final product 3D rGO/ZrO₂。

Example 3

GO was prepared by conventional methods and was formulated with deionized water as required to a 3mg/mL dispersion.

40mg of ZrOCl₂·8H₂O and 50mg of glutamic acid were dissolved in 1mL of deionized water and sonicated for 10 min. The mixture and 5mL of 3mg/mL GO dispersion were added to 30mL of ethylene glycol with stirring. Transferring the mixed solution into a polytetrafluoroethylene reaction kettle, carrying out hydrothermal reaction at 180 ℃ for 6 hours, repeatedly washing the reacted material with deionized water for many times to remove impurities, and finally carrying out freeze drying to obtain a final product 3D rGO/ZrO₂。

Example 4

GO was prepared by conventional methods and was formulated with deionized water as required to a 3mg/mL dispersion.

60mg of ZrOCl₂·8H₂O and 50mg of glutamic acid were dissolved in 1mL of deionized water and sonicated for 10 min. The mixture and 5mL of 3mg/mL GO dispersion were added to 30mL of ethylene glycol with stirring. Transferring the mixed solution into a polytetrafluoroethylene reaction kettle, carrying out hydrothermal reaction at 180 ℃ for 6 hours, repeatedly washing the reacted material with deionized water for many times to remove impurities, and finally carrying out freeze drying to obtain a final product 3D rGO/ZrO₂。

Without being limited thereto, any changes or substitutions that are not thought of through the inventive work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (2)

1. A preparation method of a phosphate adsorbent based on a 3D rGO/zirconium dioxide composite material is characterized by comprising the following steps:

(1) preparing GO by a conventional method, and preparing 3mg/mL dispersion liquid by deionized water according to requirements;

(2) ZrOCl₂·8H₂Dissolving O and 50mg glutamic acid in 1mL deionized water, and performing ultrasonic treatment for 10min to obtain ZrOCl₂·8H₂The amount of O is 30-60 mg;

(3) mixing the mixed solution obtained in the step (2) with 3mL of 3mg/L GO dispersion solution, and then carrying out hydrothermal reaction at 180 ℃ for 6 h;

(4) collecting the reacted product, washing and drying to obtain the final product 3D rGO/ZrO₂。

2. The process for the preparation of the 3D rGO/zirconium dioxide composite based phosphate adsorbent according to claim 1, characterized in that: the obtained product can efficiently adsorb phosphate ions.

Images