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Preparation method of polyaniline/graphene controllable load platinum nanoparticles

A technology of graphene and polyaniline, which is applied in the field of synthesis of PANI/rGNS nanocomposite materials, can solve problems such as easy agglomeration of products, poor dispersion, and influence on the uniform dispersion of PtNPs, and achieve the effects of preventing agglomeration, high-efficiency loading, and excellent electrocatalytic activity

Inactive Publication Date: 2013-03-13
NANCHANG UNIV
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Problems solved by technology

At present, the preparation of polyaniline / graphene composites mainly adopts direct chemical methods, and the resulting products are easy to agglomerate and have poor dispersion, which seriously affects the uniform dispersion of Pt NPs.

Method used

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  • Preparation method of polyaniline/graphene controllable load platinum nanoparticles
  • Preparation method of polyaniline/graphene controllable load platinum nanoparticles
  • Preparation method of polyaniline/graphene controllable load platinum nanoparticles

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Experimental program
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Embodiment 1

[0025] (1) Preparation of rGNS: First, graphene oxide was prepared by the improved Hummers method (Li, D.; Muller, M. B.; Gilje, S.; Kaner, R. B.; Wallace, G. G. Nat. Nanotechnol. 2008, 3, 101-105 ; Hummers, W. S.; Offeman, R. E. J Am Chem Soc. 1958, 80, 1339; Cote, L. J.; Kim, F.; Huang, J. X. J Am Chem Soc. 2009, 131, 1043-1049.); Add 1 mg / mL graphene oxide into a 250 mL three-neck flask, add 150 mg NaBH 4 , mechanically stirred in a water bath at 80°C for 6 hours, then centrifuged and washed the product with twice distilled water until the supernatant was neutral, the centrifugal cleaning speed was 12000 r / min~14000 r / min, and the centrifugation time was 5 minutes. The obtained product was dispersed into 10 mL of double-distilled water, and ultrasonicated for 20 minutes (ultrasonic power was 150 W~200 W), and uniformly dispersed reduced graphene was obtained;

[0026] (2) Synthesis of PANI / rGNS nanocomposites by liquid / liquid interface method: 5 mg aniline was dissolved in...

Embodiment 2

[0030] (1) For the preparation method of rGNS and PANI / rGNS, refer to steps (1) and (2) of Example 1.

[0031] (2) Preparation of Pt / PANI / rGNS catalysts with different Pt loadings: disperse 0.5 mg, 1.0 mg, 2.0 mg, and 5.0 mg of PANI / rGNS in 4 mL of twice-distilled water, sonicate for 20 min, and then add 5 mg h 2 PtCl 6 solution and 0.25 mL HCOOH solution, and stirred magnetically at about 25°C for 24 hours, then centrifuged the product with double distilled water (centrifugal cleaning speed was 10000 r / min~12000 r / min), and the centrifugation time was 3 minutes. The product was vacuum-dried at 40 °C for 48 hours, and the mass fractions of Pt NPs of Pt / PANI / rGNS nanocatalysts were 86 wt %, 75 wt %, 57 wt % and 39 wt %, respectively.

[0032] The transmission electron microscopy results of the prepared Pt / PANI / rGNS nanocatalysts are shown in Figure 7 , it can be seen from the figure that the particle size of Pt NPs does not change significantly with the change of loading de...

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Abstract

A preparation method of polyaniline / graphene controllable load platinum nanoparticles comprises the following steps of: (1) preparing reduced grapheme; (2) synthesizing a polyaniline / reduced grapheme (PANI / rGNS) nanocomposite by a liquid-liquid interfacial method; (3) preparing a platinum loaded polyaniline / graphene (Pt / PANI / rGNS) nanocatalyst. The invention has the following advantages: by the adoption of the liquid-liquid interfacial polymerization method, the uniformly dispersed PANI / rGNS nanocomposite is synthesized, thus effectively preventing the agglomeration of the composite material,making for uniformly and controllably loading PtNPs on the surface of PANI / rGNS, solving the technical difficulty of metal particle agglomeration and realizing uniform and efficient loading of PtNPs;an electrochemical test result shows that the catalyst has excellent electrocatalytic activity for methanol oxidation and oxygen reduction and ultrasensitive detection of hydrogen peroxide (H2O2) andglucose can be also realized.

Description

technical field [0001] The invention relates to a PANI / rGNS nanocomposite material synthesized by a novel liquid / liquid interface polymerization method, in particular to a preparation method of polyaniline / graphene controllably loaded platinum nanoparticles. Background technique [0002] PANI is a special conductive polymer with alternating benzene rings and nitrogen atoms in the main chain, which has the advantages of low raw material cost, simple synthesis method and high environmental stability. Graphene is a two-dimensional crystal with a single layer of carbon atoms. Graphene has extraordinary electrical conductivity, ultra-high specific surface area, strength dozens of times stronger than steel, and excellent light transmission. Its appearance is expected to It has triggered a round of revolution in the field of modern material science, and has very broad application prospects. Combining the unique conductivity and ultra-high specific surface area of ​​graphene with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06B01J37/00H01M4/92G01N27/48
CPCY02E60/50
Inventor 邱建丁石玲梁汝萍
Owner NANCHANG UNIV
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