Method for preparing carbon nitride tube-polyaniline-gold composite material and application method thereof

A composite material, carbon nitrogen tube technology, applied in the direction of material electrochemical variables, etc., to achieve the effects of easy availability of raw materials, high sensitivity, and strong anti-interference ability

Inactive Publication Date: 2011-05-11
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are also many reports on PANI/Au nanocomposites [Peng Z, Guo L, Zhang Z, Tesche B, Wilke T, Ogermann D, Hu S and Kleinermanns K 2006 Langmuir 2210915], however, carbon nitroge

Method used

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  • Method for preparing carbon nitride tube-polyaniline-gold composite material and application method thereof
  • Method for preparing carbon nitride tube-polyaniline-gold composite material and application method thereof
  • Method for preparing carbon nitride tube-polyaniline-gold composite material and application method thereof

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Embodiment 1

[0023] Embodiment 1. Preparation of carbon nitrogen tube / polyaniline nanocomposite

[0024] Carbonitride tubes and their acidification treatment were synthesized according to literature methods [see: Chen H, Yang Y, Hu Z, Huo K F, Ma Y W and Chen Y 2006 J.Phys.Chem.B 110 16422]. Acidified carbon nitrogen tube (2mg / mg) 5mL was dissolved in 1% polydiallyldimethylammonium chloride (PDDA) in 10mL NaCl (0.5M) aqueous solution, stirred for 20 minutes, washed with water, and then dissolved in 1% polystyrene sodium sulfonate (PSS) in 10 mL NaCl (0.5 M) aqueous solution, stirred for 20 minutes, washed with water, separated and dissolved in 1 mol / L HCl solution, added 10 μL of aniline monomer, stirred for 30 minutes , add 5 mL of 1 mol / L hydrochloric acid solution containing 24.38 mg oxidant ammonium persulfate, react for 24 hours, wash with water, centrifuge, and dry to obtain carbon nitrogen tube / polyaniline.

Embodiment 2

[0025] Embodiment 2. Preparation of carbon nitrogen tube / polyaniline / gold nanocomposite

[0026] The carbon nitrogen tube / polyaniline is dispersed in the gold colloid, and the gold colloid is synthesized according to the literature method [Yan W, Feng X M, Chen X J, Hou W H and Zhu J-J 2008 Biosens.Bioelectron.23 925], and the carbon nitrogen tube / polyaniline is obtained / gold nanocomposites.

Embodiment 3

[0027] Embodiment 3. Electrochemical activity test of carbon nitrogen tube / polyaniline and carbon nitrogen tube / polyaniline / gold nanocomposite

[0028] The carbon nitrogen tube / polyaniline and carbon nitrogen tube / polyaniline / gold modified electrodes are in the phosphate buffer solution with pH from 1 to 8 in the electrolyte, the potential window is -0.4-0.8v, and the sweep speed is 100mV / s In the case of cyclic voltammetry test.

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Abstract

The invention discloses a method for preparing a carbon nitride tube-polyaniline-gold composite material and an application method thereof. The method comprises the following steps: the acidified carbon nitride tube solution is alternatively treated by aqueous solutions, in which polydiene propyl dimethyl ammonium chloride and polystyrene sodium sulfonate sodium chloride serve as solutes respectively, and is then dissolved in hydrochloric acid solution; aniline monomer is added into the mixed solution, and hydrochloric acid solution serving as an oxidant and containing ammonium persulphate is added after the carbon nitride tube solution and the hydrochloric acid solution are uniformly mixed; carbon nitride tube-polyaniline is gained by washing, centrifuging and drying a reaction product obtained after the carbon nitride tube solution is reacted with the ammonium persulphate for 24 hours, and is dispersed in gold colloid; and carbon nitride tube-polyaniline-gold is obtained by centrifuging and drying a reaction product obtained after the carbon nitride tube-polyaniline is reacted with the gold colloid for 30 minutes. The pipe diameter of the two prepared composite materials is 60 nm, the carbon nitride tube-polyaniline and a modified electrode compose a dopamine biosensor, the detectability of the dopamine biosensor is 0.01 MuM, and the linearity range of the dopamine biosensor is 1-80 MuM and 1.5-3.5 mM. The carbon nitride tube-polyaniline-gold and a modified electrode compose a peroxide biosensor, the detectability of the peroxide biosensor is 1.4 MuM, and the linearity range of the peroxide biosensor is 0.02-2.05 mM.

Description

technical field [0001] The invention relates to the synthesis of carbon nitrogen tube / polyaniline and carbon nitrogen tube / polyaniline / gold composite material and their application in biosensors. Specifically, carbon nitride tubes / polyaniline and carbon nitride tubes / polyaniline / gold composites were prepared by self-assembly method, and biosensors for dopamine and hydrogen peroxide were constructed. Background technique [0002] The synthesis of novel nanomaterials provides new avenues for the development of novel biosensors. Carbon nanomaterials are an ideal electrode material, and carbon modified electrodes have many advantages, such as: fast response time, high conductivity, good biocompatibility, etc. [Ref: Alwarappan S, Erdem A, Liu C and Li C 2009 J .Phys.Chem.C 113 8853]. Among them, carbon nanotubes have attracted many scientific researchers to study their structure, properties and applications due to their unique structure, peculiar physical, chemical and mechanic...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08K9/04C08K7/00C08K3/08C08G73/02G01N27/26
Inventor 冯晓苗李瑞梅马延文黄维范曲立
Owner NANJING UNIV OF POSTS & TELECOMM
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