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A porous reduced graphene oxide oil-absorbing material with controllable doping degree and its preparation method

An oil-absorbing material and graphene technology, applied in the field of nanomaterials, can solve the problems of chemical reductant doping degree, oil-absorbing performance, influence of mechanical properties, uneven pore size, poor oil selectivity, etc., to promote selective oil absorption and good adsorption. Ability, high hydrophobicity effect

Active Publication Date: 2020-05-12
SHANGHAI INST OF TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although traditional graphene airgel oil-absorbing materials have the ability to adsorb oil and organic pollutants, their selectivity to oil is poor due to their uneven pore size and poor repeatability.
The reductive assembly process of amino acid chemicals on graphene oxide is rarely reported, and the doping degree of the prepared reduced graphene oxide airgel is usually uncontrollable
The doping degree of the chemical reducing agent will affect the oil absorption performance and mechanical properties of the material. Therefore, how to obtain the reduced graphene oxide aerogel with a controllable doping degree can better complete the development of the graphene oxide aerogel. Selective oil absorption remains a great challenge

Method used

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  • A porous reduced graphene oxide oil-absorbing material with controllable doping degree and its preparation method
  • A porous reduced graphene oxide oil-absorbing material with controllable doping degree and its preparation method
  • A porous reduced graphene oxide oil-absorbing material with controllable doping degree and its preparation method

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Embodiment 1～6

[0028] (1) Weigh 750 mg of graphene oxide solids into a beaker, add 100 ml of deionized water to prepare a 7.5 mg / ml graphene oxide dispersion, and ultrasonically disperse uniformly;

[0029] (2) Measure 10ml from the dispersion obtained in step 1) and transfer it to a 30ml straight tube reaction flask;

[0030] (3) Weigh 75 mg of tyrosine reducing agent and add it to the dispersion obtained in step 2);

[0031] (4) Add to the solution obtained in step 3) a formic acid aqueous solution with pH 2 prepared by using formic acid as a co-solvent and formic acid as an acidic medium, and fill it with a height of 80%, and ultrasonically disperse uniformly after sufficient shaking;

[0032] (5) Put the reaction flask obtained in step 4) into an autoclave with a polytetrafluoroethylene lining, and react at 120°C for 32 hours;

[0033] (6) After the reaction liquid is naturally cooled, the gel obtained is washed with deionized water, washed with ethanol, soaked in dilute ammonia water, and then fr...

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Abstract

The invention discloses a porous reduced graphene oxide oil absorption material with a controllable doping level and a preparation method thereof. The porous reduced graphene oxide oil absorption material with the controllable doping level is of a hierarchical porous structure stacked layer by layer; a reduced graphene oxide aerogel is adopted as a substrate; and amino acid is doped in a framework of the reduced graphene oxide aerogel. The preparation method provided by the invention comprises the steps of firstly mixing graphene oxide and an amino acid reducing agent dissolving solution; then obtaining a reduced graphene oxide hydrogel through a high pressure hydrothermal method; and finally, washing the hydrogel, freezing at low temperature for pore-forming, and obtaining the porous reduced graphene oxide oil absorption material. The oil absorption material provided by the invention has favorable hydrophobicity, has a better adsorption capacity on an oil product and an organic pollutant, and achieves the aim of oil-water separation in an oil-water composite environment; and meanwhile, pore diameter distribution and a pore structure of the material can be regulated and controlled through the control on the doping level, the selective oil absorption of the material is promoted, and the selective adsorption of the oil product is realized.

Description

Technical field [0001] The invention belongs to the technical field of nanomaterials, and specifically relates to a porous reduced graphene oxide oil-absorbing material with a controllable doping degree and a preparation method thereof. Background technique [0002] Graphene aerogel has high specific surface area and multi-level pore structure characteristics, and has a wide range of applications in the fields of supercapacitors, lithium batteries, catalysis, and adsorption. The absorption of oil-absorbing materials is very effective in the treatment of marine oil spills and organic pollutants. Because of its high efficiency, economy, and easy recovery of oil and organic matter, it is widely used in the emergency treatment of marine oil spill pollution. However, traditional oil-absorbing materials have various disadvantages in practical applications due to their poor hydrophobicity, low oil absorption, potential biological toxicity, and difficulty in recycling. Therefore, it is u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/20B01J20/22
Inventor 卢德力任济夫刘玥冉任大伟韩生
Owner SHANGHAI INST OF TECH
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