Preparation method and application of oxidized graphene based cadmium ion imprinted polymer

A technology of ion imprinting and alkenyl cadmium, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., to achieve the effect of improving adsorption capacity, large adsorption capacity, and stable and controllable polymerization process

Inactive Publication Date: 2015-11-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the microemulsion system, using graphene oxide as the matrix, using the method of RAFT polymerization, the study

Method used

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  • Preparation method and application of oxidized graphene based cadmium ion imprinted polymer
  • Preparation method and application of oxidized graphene based cadmium ion imprinted polymer
  • Preparation method and application of oxidized graphene based cadmium ion imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of graphene oxide

[0036] In a 250mL beaker, add 23mL of 98% concentrated sulfuric acid and place in an ice-water bath. Then, under stirring condition, add 1g colloidal graphite powder and 0.5g sodium nitrate. Then under strong stirring, slowly add 3g of potassium permanganate, keep the temperature below 20°C during the reaction; then remove the ice-water bath, raise the temperature to 35°C, and continue the reaction for 30min. Under stirring conditions, slowly add 46mL deionized water, and raise the temperature to 98°C, the solution turns brown, and react for 15min; then add about 140mL of 60°C hot deionized water and 4.5mL of 30% hydrogen peroxide until the reaction is completed It is brownish yellow in color. Finally, through centrifugation, first wash with 5% hydrochloric acid until there is no sulfate group, then wash with deionized water until neutral, and finally process by ultrasonic treatment and dry at 50°C to obtain graphene oxide.

[0037...

Embodiment 2

[0044] (1) Preparation of graphene oxide

[0045] In a 250mL beaker, add 23mL of 98% concentrated sulfuric acid and place in an ice-water bath. Then, under stirring condition, add 1g colloidal graphite powder and 0.5g sodium nitrate. Then under strong stirring, slowly add 3g of potassium permanganate, keep the temperature below 20°C during the reaction; then remove the ice-water bath, raise the temperature to 35°C, and continue the reaction for 30min. Under stirring conditions, slowly add 46mL deionized water, and raise the temperature to 98°C, the solution turns brown, and react for 15min; then add about 140mL of 60°C hot deionized water and 4.5mL of 30% hydrogen peroxide until the reaction is completed It is brownish yellow in color. Finally, through centrifugation, first wash with 5% hydrochloric acid until there is no sulfate group, then wash with deionized water until neutral, and finally process by ultrasonic treatment and dry at 50°C to obtain graphene oxide.

[0046...

Embodiment 3

[0054] (1) Preparation of graphene oxide

[0055] In a 250mL beaker, add 23mL of 98% concentrated sulfuric acid and place in an ice-water bath. Then, under stirring condition, add 1g colloidal graphite powder and 0.5g sodium nitrate. Then under strong stirring, slowly add 3g of potassium permanganate, keep the temperature below 20°C during the reaction; then remove the ice-water bath, raise the temperature to 35°C, and continue the reaction for 30min. Under stirring conditions, slowly add 46mL deionized water, and raise the temperature to 98°C, the solution turns brown, and react for 15min; then add about 140mL of 60°C hot deionized water and 4.5mL of 30% hydrogen peroxide until the reaction is completed It is brownish yellow in color. Finally, through centrifugation, first wash with 5% hydrochloric acid until there is no sulfate group, then wash with deionized water until neutral, and finally process by ultrasonic treatment and dry at 50°C to obtain graphene oxide.

[0056...

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Abstract

The invention relates to a preparation method and application of an oxidized graphene based cadmium ion imprinted polymer and belongs to the field of new technology of environment function material preparation and water treatment. The preparation method includes: taking oxidized graphene as a substrate, Cd (II) as a template, methyl methacrylate (MMA) as monomer, cetyl trimethyl ammonium bromide (CTAB) as surfactant, azodiisobutyronitrile (AIBN) as initiator and S,S'-di(alpha, alpha'-dimethyl-alpha''-aceto) trithiocarbonate (BDAT) as RAFT auxiliary; performing reversible addition-fragmentation chain transfer (RAFT) polymerization in microemulsion to prepare a cadmium ion imprinted polymer composite material adsorbent taking oxidized graphene as the substrate. Performance in adsorbing Cd (II) is studied. The adsorbent has high selectivity to Cd (II) and large in adsorption capacity; the polymerization process can be controlled by controlling reactant ratio, and the preparation method is simple in operation and has wide application prospect in the environment field of sewage treatment.

Description

technical field [0001] The invention relates to a preparation method and application of a graphene oxide-based cadmium ion imprinted polymer, which belongs to the field of environmental functional material preparation and water treatment new technologies. Background technique [0002] With the rapid development of the economy, a large number of chemical reagents in the industrial and agricultural fields have been used in large quantities. Most of the surface water and groundwater in my country have been polluted to varying degrees. The pollutants mainly include heavy metals and organic substances. Among them, cadmium is one of the main heavy metal pollutants. one. Heavy metal cadmium can not only affect the growth and development of crops, but also cannot be biodegraded. The biological half-life in the organism is as long as 10-30 years. It can also endanger human health through bioaccumulation and eventually through the food chain. Combining with the sulfhydryl group of the...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62C02F101/20
Inventor 刘燕刘占超胡肖孟祥国
Owner JIANGSU UNIV
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