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A kind of in-based organic framework-graphene oxide composite material and its preparation method and application

An organic framework and composite material technology, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve problems such as poor adsorption efficiency, and achieve excellent adsorption performance and high adsorption capacity.

Active Publication Date: 2017-10-20
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional materials such as activated carbon, natural minerals, and industrial waste residues all show high adsorption capacity for high-concentration wastewater, but the adsorption efficiency is not good when applied to the treatment of low-concentration dye wastewater

Method used

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  • A kind of in-based organic framework-graphene oxide composite material and its preparation method and application
  • A kind of in-based organic framework-graphene oxide composite material and its preparation method and application
  • A kind of in-based organic framework-graphene oxide composite material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: comparative example

[0029] Dissolve 1.49g of indium nitrate and 0.230g of 2-aminoterephthalic acid in 12.4mL of N,N'-dimethylformamide, stir evenly and ultrasonically treat the obtained reaction solution from room temperature at a rate of 10°C / h. to 150°C, keep the temperature constant for 5h, and cool down to room temperature naturally. The product after suction filtration was rinsed with N,N′-dimethylformamide for 3 times, soaked in methanol for 3 days, and passed through a tube furnace in N 2 Calcined at 200°C for 5 hours in the atmosphere, activated at 150°C for 12 hours under vacuum, and marked the sample as MIL-68(In)-NH 2 .

Embodiment 2

[0030] Embodiment 2: Preparation of In-based organic framework-graphene oxide composite material

[0031] 0.0965g graphene oxide powder was dispersed in 11.0mLN, N'-dimethylformamide and ultrasonically treated to obtain a dispersion of graphene oxide; 1.148g indium nitrate and 0.230g 2-aminoterephthalic acid were added to In the above graphene oxide dispersion liquid, stir evenly and ultrasonically treat the obtained reaction liquid from room temperature to 160 °C at a rate of 5 °C / h, keep the temperature constant for 6 hours, and cool naturally to room temperature. The product after suction filtration was rinsed with N,N′-dimethylformamide for 3 times, soaked in methanol for 3 days, and passed through a tube furnace in N 2 Calcined at 180°C for 5 hours in the atmosphere, activated at 130°C for 12 hours under vacuum, and marked the sample as MIL-68(In)-NH 2 @GO-1.

Embodiment 3

[0032] Embodiment 3: Preparation of In-based organic framework-graphene oxide composite material

[0033] 0.0722g of graphene oxide powder was dispersed in 10.1mLN, N'-dimethylformamide and ultrasonically treated to obtain a dispersion of graphene oxide; 1.207g of indium nitrate and 0.237g of 2-aminoterephthalic acid were added to In the above graphene oxide dispersion liquid, uniformly stirred and ultrasonically treated, the obtained reaction liquid was raised from room temperature to 170 °C at a rate of 8 °C / h, kept at a constant temperature for 5 hours, and then naturally cooled to room temperature. The product after suction filtration was rinsed with N,N′-dimethylformamide for 3 times, soaked in methanol for 3 days, and passed through a tube furnace in N 2 Calcined at 150°C for 5 hours in the atmosphere, activated at 100°C for 12 hours under vacuum, and marked the sample as MIL-68(In)-NH 2 @GO-2.

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Abstract

The invention belongs to the technical field of metal-organic framework materials, and discloses an In-based organic framework-graphene oxide composite material and its preparation method and application. The preparation method is: dispersing graphene oxide powder in N,N'-dimethyl formamide and perform ultrasonic treatment to obtain a dispersion liquid; add soluble indium salt and 2-aminoterephthalic acid to the above dispersion liquid, stir evenly and perform ultrasonic treatment to obtain a reaction liquid, react under programmed temperature conditions to obtain crude Prepare the composite material; wash and soak the crude composite material with N,N′-dimethylformamide and methanol solvent successively, activate, and finally obtain the target composite material. The material prepared by the present invention has a large specific surface, has a well-developed microporous pore structure, and has a high adsorption capacity for rhodamine B dye molecules at a low concentration in water. Under the same conditions, the adsorption capacity for rhodamine B is 2.24 times that of activated carbon. , 20.1 times that of ZSM‑5 molecular sieve.

Description

technical field [0001] The invention relates to a dye molecule rhodamine B adsorption material in water, in particular to an In-based organic framework-graphene oxide composite material and a preparation method thereof. Background technique [0002] Dyes are widely used in printing and dyeing, paper making, paint, wood preservatives and other industries. In some developing countries, the amount of wastewater discharged by the textile industry is estimated to be more than one billion tons per year. High chroma dye wastewater seriously affects the water quality, and will have toxic effects on organisms and even "three causes" effects. In view of the toxicity of dye molecules, their complex structure, and poor biochemical properties, the effective and safe adsorption and removal of dye molecules in water has important scientific and practical significance for solving the problem of water environmental safety. [0003] For the treatment of high-concentration dye wastewater in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
Inventor 程建华杨草郑华生张鹏谢培镇
Owner SOUTH CHINA UNIV OF TECH
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