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Preparation method and application of ag/pam/ppy/go composite material

A composite material and graphene composite technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as easy agglomeration of silver nanoparticles, The effect of achieving excellent catalytic performance

Active Publication Date: 2019-02-19
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to prepare a kind of Ag / PAM / PPy / GO composite material, solve the problem of the easy agglomeration of silver nanoparticle, and utilize the synergy of silver nanoparticle and PAM / PPy / GO composite material to increase the catalytic efficiency of catalyst

Method used

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  • Preparation method and application of ag/pam/ppy/go composite material
  • Preparation method and application of ag/pam/ppy/go composite material
  • Preparation method and application of ag/pam/ppy/go composite material

Examples

Experimental program
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Embodiment 1A

[0030] The preparation of embodiment 1Ag / PAM / PPy / GO composite material

[0031] 1) Synthesis of polyacrylamide / polypyrrole / graphene oxide composite nanosheets (PAM / PPy / GO)

[0032] 1.1) Synthesis of graphene oxide (GO)

[0033] Graphene oxide is synthesized by the hummer method. First, add 67.5mL of concentrated sulfuric acid to a 250mL three-necked bottle, place it in an ice-water bath, then add 2g of graphite and 1.6g of sodium nitrate into the three-necked bottle, stir well and slowly add 9g of permanganate Potassium, and then put the three-necked bottle in an oil bath, react at 32-38°C for half an hour, and let it stand at room temperature for 5 days. Then it was diluted with 560mL warm water, and hydrogen peroxide (30%) was added dropwise until the solution was bright yellow. Finally, it was centrifuged and washed with deionized water until neutral, and dried in a vacuum oven at 50°C for 24 hours to obtain graphene oxide (GO).

[0034] 1.2) Synthesis of polypyrrole / gra...

Embodiment 2

[0046] Example 2Ag / PAM / PPy / GO composite material research on p-nitrophenol (4-NP) catalytic properties

[0047] (1) Method: The Ag / PAM / PPy / GO composite material prepared in Example 1 was used to catalyze the reduction of p-nitrophenol.

[0048] Take 0.4mg of dried Ag / PAM / PPy / GO complex, add it to 4mL of newly prepared 10mM sodium borohydride solution, disperse evenly, then add 1 microliter of 0.4M newly prepared p-nitrophenol aqueous solution and start timing , the absorbance was measured with a UV-Vis spectrophotometer at intervals of 30 s.

[0049] (2) Test results

[0050] Figure 4 It shows the ultraviolet absorption spectrum of absorbance changing with time as the reaction progresses. We can see that the absorption peak of p-nitrophenol (4-NP) at 400nm decreases with time, and after 2.5min, the absorption peak of p-nitrophenol almost disappears; meanwhile, at 295nm, p-nitrophenol ( The absorption peak of the reduction product p-aminophenol (4-AP) of 4-NP) appeared alo...

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Abstract

The invention discloses a method for preparing Ag / PAM / PPy / GO composite materials, which includes: 1) firstly using the hummer method to synthesize graphene oxide, and using polypyrrole to combine with graphene oxide through hydrogen bonds to obtain polypyrrole / graphene oxide , then connect propylene chloride to the surface of polypyrrole / graphene oxide through a substitution reaction to obtain intermediate A; then use acrylamide as the monomer and azobisisobutyronitrile as the initiator to initiate the formation of acrylamide on the surface of intermediate A Vinyl polymerization occurs to obtain PAM / PPy / GO; 2) Mix PAM / PPy / GO and AgNO3 solution evenly, use sodium borohydride as the reducing agent, and reduce Ag+ in situ on the surface of PAM / PPy / GO to obtain Ag / PAM / PPy / GO. Solve the problem of easy agglomeration of silver nanoparticles, and use the synergistic effect of silver nanoparticles and PAM / PPy / GO composite materials to increase the catalytic efficiency of the catalyst.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a preparation method of an Ag / PAM / PPy / GO composite material and its catalytic reduction of p-nitrophenol (4-NP). Background technique [0002] In recent years, with the development of nanotechnology, noble metal nanoparticles have attracted widespread attention due to their excellent performance in electronic devices, optical materials, medicine, wastewater treatment, catalysts, etc. Silver nanoparticles have attracted special attention because of their lower cost than other metals. In order to prevent the agglomeration of silver nanoparticles and improve their performance, silver nanoparticles are generally supported on carriers, such as activated carbon, carbon nanotubes, zeolites, silica, alumina and polymers. [0003] p-Nitrophenol is a pollutant in industrial waste and agricultural wastewater, while its reduced product, polyaminophenol, has little toxicity. Mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C02F1/70C02F101/34C02F101/38
CPCC02F1/70B01J31/28C02F2101/38C02F2101/345B01J35/33
Inventor 宋溪明纪春光茆卉刘美宏
Owner LIAONING UNIVERSITY