Graphene-metal-poly(m-phenylenediamine) plural gel as well as quick preparation and application methods thereof

A polym-phenylenediamine, composite gel technology, applied in the directions of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the complex synthesis process, residual toxic monomers, and harsh reaction conditions. and other problems, to achieve the effect of high reaction efficiency, efficient and fast reaction, and good mechanical properties

Active Publication Date: 2014-05-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the preparation process of graphene polymer gel, it is often necessary to add a reducing agent (NaBH 4 , HI, Na 2 S, hydroquinone, ascorbic acid, etc.) (Nanoscale2011, 3(8), 3132-3137; Journal of Materials Chemistry2012, 22(42), 22459-22466), crosslinking agent (Ca 2+ , PAM) (Small2013,10(3),448–453), polymerization initiator ((NH 4 ) 2 S 2 o 8 ) (2013, 25(16), 3357-3362) or polymer pre-synthesis steps (Chemical Communications2013, 49(85), 9974-9976), etc., and the reaction conditions are relatively harsh, such as requiring high temperature hydrothermal (t≥6h ) and other steps, the synthesis process is relatively complex and easy to cause secondary pollution (residual toxic monomers in the polymer synthesis process)

Method used

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  • Graphene-metal-poly(m-phenylenediamine) plural gel as well as quick preparation and application methods thereof
  • Graphene-metal-poly(m-phenylenediamine) plural gel as well as quick preparation and application methods thereof
  • Graphene-metal-poly(m-phenylenediamine) plural gel as well as quick preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Synthetic graphene-copper-poly-m-phenylenediamine gel.

[0027] Slowly add 5g graphite powder to 30g KMnO under ice bath 4 and 120mL of concentrated sulfuric acid mixed solution, after stirring evenly, raise the temperature to 35°C for 30min, add 500mL of water, raise the temperature to 85°C for 2h, add 200mL of 30%H 2 o 2 , sufficient suction filtration and dialysis to remove impurity ions, and the product is graphene oxide. Make 5ml concentration to 5mg mL -1 The graphene oxide was ultrasonically dispersed for 1 h to obtain a uniform dispersion of graphene oxide. Dilute 1mL concentration to 10mg mL -1 The m-phenylenediamine solution with 0.1mL concentration is 40mg mL -1 CuCl 2 2H 2 The O solution was mixed and quickly added to the graphene oxide dispersion under ultrasound to form a GO-Cu-mPD gel (t≤1min). The gel was reacted at 95°C for 1 h to obtain rGO-Cu-PmPD gel. By measuring the residual liquid organic matter content (TOC method) and meta...

Embodiment 2

[0028] Embodiment 2: Synthetic graphene-copper-poly-m-phenylenediamine gel.

[0029] The preparation of graphene oxide is the same as in Example 1. Make 5ml concentration to 2mg mL -1 The graphene oxide was ultrasonically dispersed for 1 h to obtain a uniform dispersion of graphene oxide. Dilute 1mL concentration to 10mg mL -1 m-Phenylenediamine solution with a concentration of 0.1mL to 40mgmL -1 CuCl 2 2H 2O solution was mixed and quickly added to the graphene oxide dispersion under ultrasonication. After standing still for 1 min, the GO-Cu-mPD gel was formed, and the gel was reacted at 90°C for 1 h to obtain the rGO-Cu-PmPD gel. The monomer conversion rate is as high as 99.5%, and the metal ion chelation rate is 94.7%.

Embodiment 3

[0030] Embodiment 3: Synthetic graphene-copper-poly-m-phenylenediamine gel.

[0031] The preparation of graphene oxide is the same as in Example 1. Make 5ml concentration to 5mg mL -1 The graphene oxide was ultrasonically dispersed for 1 h to obtain a uniform dispersion of graphene oxide. Dilute 1mL concentration to 20mg mL -1 m-Phenylenediamine solution with a concentration of 0.2mL to 40mgmL -1 CuCl 2 2H 2 O solution was mixed and quickly added to the graphene oxide dispersion under ultrasonication. After standing still for 1 min, the GO-Cu-mPD gel was formed, and the gel was reacted at 80°C for 2 h to obtain the rGO-Cu-PmPD gel. The monomer conversion rate is as high as 99.1%, and the metal ion chelation rate is 92.9%

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Abstract

The invention discloses graphene-metal-poly(m-phenylenediamine) plural gel as well as quick preparation and application methods thereof. In the method, metal ions, organic monomers and graphene oxide are taken as raw materials, a high-activity complex comprises the metal ions and the organic monomers, and the graphene-metal-poly(m-phenylenediamine) plural gel is obtained by performing in-situ reduction oxidation on graphite so as to cause graphene gelatinization and then performing one-step quick hydrothermal. According to the method, the redox characteristics of the raw materials are fully used, so that a polymerization initiator and a gel crosslinking agent do not need to be added; the preparation method is simple and fast (1-2 hours); the monomer conversion rate is higher than or equal to 99.0 percent; the synthesis process is clean, and the cost is low; the plural gel can be used for high-efficiency dye adsorption; the static saturated adsorption (methylthionine chloride) capacity is up to 615mg/g<-1>.

Description

technical field [0001] The invention belongs to the field of graphene composite gel preparation and water treatment thereof, and relates to a graphene composite gel material synthesized cleanly and quickly in one step, a preparation method thereof, and an application method of using the graphene composite gel material for water body dye adsorption. Background technique [0002] Hydrogel is a kind of flexible macroscopic body, which is widely used in basic research fields such as energy storage, catalysis, biomedicine, and environment. (Chemical Society Reviews2013, 42(2), 794-830; Chemical Society Reviews2010, 39(9), 3528-3540) In the environmental field involving the adsorption process, its advantages are highlighted as follows: 1) The microporous structure endows it with excellent transport properties. 2) The macroscopic three-dimensional structure solves the problem of cumbersome separation of nano components; 3) The components can be organically assembled according to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 王海鹰柴立元王婷张理源杨卫春杨志辉唐崇俭刘恢
Owner CENT SOUTH UNIV
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