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Preparation method and application of magnetic graphene titanium dioxide nano composite wastewater treatment agent

A technology of magnetic graphene and wastewater treatment agent, which is applied in special compound water treatment, magnetic field/electric field water/sewage treatment, water/sewage treatment, etc. It can solve the problems of poor photodegradation performance recovery and regeneration performance, and achieve high-efficiency adsorption and photocatalytic degradation, good regeneration performance

Inactive Publication Date: 2017-12-08
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that titanium dioxide / ferric oxide / graphene has poor photodegradation performance and recovery and regeneration performance of organic pollutants in water, and provides a titanium dioxide / ferric oxide / The preparation method of graphene nano-composite material; Another object of the present invention relates to the application of titanium dioxide / ferric oxide / graphene nano-composite material in sewage treatment as wastewater treatment agent

Method used

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  • Preparation method and application of magnetic graphene titanium dioxide nano composite wastewater treatment agent
  • Preparation method and application of magnetic graphene titanium dioxide nano composite wastewater treatment agent
  • Preparation method and application of magnetic graphene titanium dioxide nano composite wastewater treatment agent

Examples

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Embodiment 1

[0028] 1. Preparation of sulfonated graphene:

[0029] ① Disperse 50 mg of graphene oxide in 50 mL of deionized water, and obtain a graphene oxide suspension with a concentration of 1 mg / mL after ultrasonic dispersion;

[0030] ② Dissolve 36 mg of sodium nitrite in 20 g of water to obtain an aqueous solution of sodium nitrite. After cooling to 0 °C, add 92 mg of p-aminobenzenesulfonic acid and 1 mL of aqueous HCl with a concentration of 1 mol / L. Reacted for 30 minutes to obtain aryl diazonium salt;

[0031] ③ Dissolve 300 mg of sodium borohydride in 15 mL of water to obtain an aqueous solution of sodium borohydride; adjust the pH of the graphene oxide suspension prepared in step ① to 9 with 5 wt% aqueous sodium carbonate solution, and then add the above-mentioned sodium borohydride Aqueous solution, stirred evenly, stirred and reacted at 75 °C for 2 hours, cooled to room temperature after the reaction, ultrasonically stripped for 10 minutes, then added dropwise the aryl diazo...

Embodiment 2

[0041] 1. Preparation of sulfonated graphene:

[0042] ① Disperse 50 mg of graphene oxide in 50 mL of deionized water, and obtain a graphene oxide suspension with a concentration of 1 mg / mL after ultrasonic dispersion;

[0043] ② Dissolve 36 mg of sodium nitrite in 20 g of water to obtain an aqueous solution of sodium nitrite. After cooling to 3 °C, add 92 mg of p-aminobenzenesulfonic acid and 1 mL of aqueous HCl with a concentration of 1 mol / L. Reacted for 30 minutes to obtain aryl diazonium salt;

[0044] ③ Dissolve 360 ​​mg of sodium borohydride in 18 mL of water to obtain an aqueous solution of sodium borohydride; adjust the pH of the graphene oxide suspension prepared in step ① to 10 with 5 wt% aqueous sodium carbonate solution, and then add the above-mentioned sodium borohydride Aqueous solution, stirred evenly, stirred and reacted at 80°C for 1.5 hours, cooled to room temperature after the reaction, ultrasonically stripped for 20 minutes, then added dropwise the aryl d...

Embodiment 3

[0052] 1. Preparation of sulfonated graphene:

[0053] ① Disperse 50 mg of graphene oxide in 50 mL of deionized water, and obtain a graphene oxide suspension with a concentration of 1 mg / mL after ultrasonic dispersion;

[0054] ②Dissolve 36 mg of sodium nitrite in 20 g of water to obtain an aqueous solution of sodium nitrite. After cooling to 5 °C, add 92 mg of p-aminobenzenesulfonic acid and 1 mL of aqueous HCl with a concentration of 1 mol / L. Reacted for 30 minutes to obtain aryl diazonium salt;

[0055] ③ Dissolve 380 mg of sodium borohydride in 20 mL of water to obtain an aqueous solution of sodium borohydride; adjust the pH of the graphene oxide suspension prepared in step ① to 10 with 5 wt% aqueous sodium carbonate, and then add the above-mentioned sodium borohydride Aqueous solution, stirred evenly, stirred and reacted at 85°C for 2 hours, cooled to room temperature after the reaction, ultrasonically stripped for 30 minutes, then added dropwise the aryl diazonium salt ...

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Abstract

The invention discloses a preparation method of a magnetic graphene titanium dioxide nano composite wastewater treatment agent. The preparation method comprises the following steps: A, performing sulfonation modification on graphene by using organic small molecules so as to obtain sulfonated graphene nanosheets with high dispersibility in water; B, by taking sulfonated graphene and iron ions as raw materials, synthesizing a graphene / ferroferric oxide nano composite material with magnetism by using a coprecipitation method; C, by taking the magnetic graphene and titanium dioxide powder as raw materials, implementing a hydrothermal method, thereby obtaining a titanium dioxide / ferroferric oxide / graphene nano composite material as a composite wastewater treatment agent. The composite wastewater treatment agent prepared by using the method is capable of effectively degrading organic pollutants such as methylene blue in water, can be recycled and reused through an external magnetic field, is excellent in photocatalysis degradation performance and good in recyclability and regenerability, is very applicable to treatment on organic pollutants in water, and has important significances and application values for environment protection and sustainable development.

Description

technical field [0001] The invention relates to a preparation method and application of an efficient novel wastewater treatment agent, in particular to a preparation method and application of a highly dispersed magnetic graphene-titanium dioxide nanocomposite wastewater treatment agent. Background technique [0002] With the rapid development of my country's economy, the problem of water pollution has become increasingly prominent. Water pollution has not only aggravated the shortage of water resources, but also brought a severe test to environmental protection. Water pollutants have a wide range of sources, except for Pb discharged from industries such as smelting, batteries, electroplating, and metal processing. 2+ 、Cd 2+ and Cu 2+ In addition to heavy metal ions such as heavy metal ions; organic pollutants such as methyl violet (MV), malachite green (MG) and methylene blue (MB) discharged from papermaking, printing, textile and leather industries are particularly seriou...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F101/30
CPCC02F9/00C02F1/281C02F1/283C02F1/325C02F1/48C02F1/725C02F2101/308C02F2303/16C02F2305/10
Inventor 张丽园刘莲姜菲王传虎吕长鹏
Owner BENGBU COLLEGE
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