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Preparation method of hydroxylated graphene oxide-magnesium titanate/silver molybdate composite material

A composite material, magnesium titanate technology, which is applied in the field of preparation of hydroxylated graphene oxide-magnesium titanate/silver molybdate composite materials, can solve the problems of low processing efficiency, limited adsorption capacity, and difficult repair of composite pollution. Achieve strong adsorption, simple operation, and efficient treatment

Active Publication Date: 2020-05-01
江苏长三角环境科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex adsorption, chemical and microbial interactions between heavy metals and organic pollutants, compound pollution is much more difficult than single-factor pollution remediation.
[0003] The sheet structure of graphene oxide contains highly active oxygen-containing functional groups such as hydroxyl groups and a high specific surface area, which can effectively remove organic matter-heavy metal complex pollutants in the medium, but its adsorption capacity is limited and the treatment efficiency is low
Composite photocatalysts form free radicals on the catalyst surface to improve catalytic degradation efficiency, but it is difficult to meet long-term catalytic requirements
[0004] Organic matter-heavy metal compound pollution is becoming a research hotspot for scholars at home and abroad. There have been reports on phytoremediation, microbial remediation and other remediation technologies, but the treatment efficiency is generally low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of hydroxylated graphene oxide-magnesium titanate / silver molybdate composite material comprises the following steps:

[0022] Step 1: Preparation of Hydroxylated Graphene Oxide

[0023] (1) First, 2.0g graphene oxide, 1.0gP 2 o 5 , 1.0g Na 2 S 2 o 8 and 10 mL concentrated H 2 SO 4 After mixing evenly, heat to 85°C in a water bath, react for 8 hours, and place it for 12 hours after cooling. Repeatedly wash with ultrapure water to remove residual acid, ultrasonicate at 60°C for 5h, then vacuum dry at 65°C, add the dried crystals to 120mL of concentrated H 2 SO 4 , then add 2.0gKNO 3 , and vibrate in the oscillator for 5h, then add 0.5L water, control the temperature at 85°C to react, continue to shake for 3h, wash repeatedly with hydrochloric acid (mass percentage concentration 5-20%) and ultrapure water, and then ultrasonicate at 50°C 5h, obtain the graphene oxide that concentration is 5g / L after constant volume;

[0024] (2) Take 2g of ...

Embodiment 2

[0034] Step 1: Preparation of Hydroxylated Graphene Oxide

[0035] (1) First, 3.0g graphene oxide, 1.5gP 2 o 5 , 1.5gNa 2 S 2 o 8 and 10 mL concentrated H 2 SO 4 After mixing evenly, heat to 95°C in a water bath, react for 10 hours, and place it for 12 hours after cooling. Repeatedly wash with ultrapure water to remove residual acid, ultrasonicate at 80°C for 8h, and then vacuum-dry at 85°C, add the dried crystals to 200mL of concentrated H 2 SO 4 , then add 3.5gKNO 3 , and shake in the oscillator for 10h, then add 1.0L water, control the temperature at 95°C to react, continue to shake for 8h, wash repeatedly with hydrochloric acid (mass percentage concentration 5-20%) and ultrapure water, and then ultrasonic at 80°C 8h, obtain the graphene oxide that concentration is 10g / L after constant volume;

[0036] (2) The bromoethane that takes 5g is dissolved in the volume concentration of 50mL and is 1:1 ammoniacal liquor, after dissolving, add in the graphene oxide gained ...

Embodiment 3

[0046] Step 1: Preparation of Hydroxylated Graphene Oxide

[0047] (1) First, 4.0g graphene oxide, 2.0gP 2 o 5 , 2.0g Na 2 S 2 o 8 and 15 mL concentrated H 2 SO 4 After mixing evenly, heat to 95°C in a water bath, react for 12 hours, and place it for 12 hours after cooling. Repeatedly wash with ultrapure water to remove residual acid, ultrasonicate at 80°C for 8h, and then vacuum-dry at 85°C, add the dried crystals to 200mL of concentrated H 2 SO 4 , then add 3.5gKNO 3 , and shake in the oscillator for 10h, then add 1.0L water, control the temperature at 95°C to react, continue to shake for 10h, wash repeatedly with hydrochloric acid (mass percentage concentration 5-20%) and ultrapure water, and then ultrasonic at 80°C 5 to 8 hours, after constant volume, graphene oxide with a concentration of 10g / L was obtained;

[0048] (2) The bromoethane that takes 5g is dissolved in the volume concentration of 50mL and is 1:1 ammoniacal liquor, after dissolving, add in the graph...

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Abstract

The invention relates to a preparation method of hydroxylated graphene oxide-magnesium titanate / silver molybdate composite material. The composite material is mainly used to treat sewage organic matter-heavy metal composite pollution. Existing technologies have limited effectiveness in treating sewage organic matter-heavy metal composite pollution. In the present invention, the graphene oxide grafting group is hydroxylated and modified to increase the adsorption capacity, and the magnesium titanate / silver molybdate photocatalyst will greatly improve the degradation ability of organic pollutants. The invention not only has a strong adsorption function for organic matter and heavy metals, but also can effectively degrade organic pollutants, and has the characteristics of simple operation and efficient treatment.

Description

technical field [0001] The invention belongs to the technical field of water pollution control engineering, and in particular relates to a preparation method of a hydroxylated graphene oxide-magnesium titanate / silver molybdate composite material. Background technique [0002] With the development of pesticide, metallurgy, electroplating and other industries, more and more organic pollutants and heavy metals enter the water environment, resulting in the decline of agricultural product quality and ecological damage, and ultimately seriously affecting human health. Pollutants in the water environment mainly include heavy metals and organic pollutants, which show the characteristics of coupled and compound pollution over time. Due to the complex adsorption, chemical and microbial interactions between heavy metals and organic pollutants, compound pollution is much more difficult than single-factor pollution remediation. [0003] The sheet structure of graphene oxide contains hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/68C02F1/28C02F1/30
CPCC02F1/288C02F1/30B01J23/686C02F2305/10B01J35/39
Inventor 钟晓梅唐晓声何云霞徐翔
Owner 江苏长三角环境科学技术研究院有限公司
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