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Method for constructing ruthenium terpyridyl electrochemiluminescence sensor with graphene porous material

A ruthenium terpyridine electrochemical and porous material technology, which is applied in the direction of material electrochemical variables, can solve the problems of loss of electrode surface pore structure, affecting the performance of electrochemiluminescent sensors, and increase of electrode surface resistance, so as to achieve good conductivity and prevent The effect of reduced electrode active area and good porous structure

Inactive Publication Date: 2017-10-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene materials have the advantages of simple preparation and good electrical conductivity, and have been used to construct ruthenium triple pyridine electrochemiluminescence sensors. However, the graphene used is only a dispersion. Due to the strong interaction between graphenes, it is easy to The formation of a thin film on the electrode surface leads to the loss of the electrode surface pore structure and the increase of the electrode surface resistance, which affects the performance of the ECL sensor to a certain extent.

Method used

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  • Method for constructing ruthenium terpyridyl electrochemiluminescence sensor with graphene porous material
  • Method for constructing ruthenium terpyridyl electrochemiluminescence sensor with graphene porous material

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Experimental program
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Effect test

Embodiment 1

[0026] Measure 6mL of 2.5wt% polyvinyl alcohol solution into 35mg of graphene oxide contained in a beaker, and obtain a uniform dispersion after ultrasonic dispersion for 40min. The obtained graphene oxide dispersion was then frozen by placing the beaker in a bath filled with liquid nitrogen. After it is completely frozen, put the obtained solution into a freeze dryer whose freezing temperature has reached -60°C, turn on the vacuum mode, and operate the vacuum freeze dryer in vacuum freezing mode for 48 hours until the water in the sample is completely sublimated. A graphene oxide porous composite is obtained. Subsequently, the prepared graphene oxide porous composite was calcined in a nitrogen atmosphere at 750 °C for 2 h at a heating rate of 5 °C / min. After the calcination is completed, the sample is taken out to obtain a graphene porous material. Take PGR and ultrasonically disperse it into 1wt% Nafion solution to prepare 1.25mg mL -1 PGR. Take 5 µL of the PGR suspensi...

Embodiment 2

[0028] Measure 6mL of 2.5wt% polyvinyl alcohol solution into 35mg of graphene oxide contained in a beaker, and obtain a uniform dispersion after ultrasonic dispersion for 40min. The obtained graphene oxide dispersion was then frozen by placing the beaker in a bath filled with liquid nitrogen. After it is completely frozen, put the resulting solution into a freeze dryer whose freezing temperature has reached -60°C, turn on the vacuum mode, and operate the vacuum freeze dryer in vacuum freezing mode for 40 hours until the water in the sample is completely sublimated. The graphene oxide porous composite (PGR) is obtained. Subsequently, the prepared graphene oxide porous composite was calcined in a nitrogen atmosphere at 750° C. for 3.5 h at a heating rate of 5° C. / min. After the calcination, the sample is taken out to obtain a porous block reduced to graphene. Take a certain amount of PGR and ultrasonically disperse it into 1wt% Nafion solution to prepare 5mg mL -1 PGR.

[0...

Embodiment 3

[0032] Measure 5mL of 2.5wt% PVA solution and add it to 35mg graphene oxide contained in a beaker, and obtain a uniform dispersion after ultrasonic dispersion for 40min. The obtained graphene oxide dispersion was then frozen by placing the beaker in a bath filled with liquid nitrogen. After it is completely frozen, put the resulting solution into a freeze dryer whose freezing temperature has reached -60°C, turn on the vacuum mode, and operate the vacuum freeze dryer in vacuum freezing mode for 55 hours until the water in the sample is completely sublimated. The graphene oxide porous composite (PGR) is obtained. Subsequently, the prepared graphene oxide porous composite was calcined in a nitrogen atmosphere at 800° C. for 1.5 h at a heating rate of 2° C. / min. After the calcination, the sample is taken out to obtain a porous block reduced to graphene. Take a certain amount of PGR and ultrasonically disperse it into 1wt% Nafion solution to prepare 2.5mg mL -1 PGR. Take 5 μl ...

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Abstract

The present invention discloses a method for constructing a terpyridyl ruthenium electrochemiluminescence sensor from a graphene porous material. The method is as below: first, reducing graphene oxide composite material freeze-dried graphene three-dimensional porous material (porous graphene, PGR) by high-temperature; fixing terpyridyl ruthenium (Ru(bpy)3<2+>) to a PGR modified glassy carbon electrode by using Nafion ion exchange effect; and successfully applying the sensor to detection of tripropylamine. The linear range is 1*10<-6> to 1*10<-4>M, and the test line is 1*10<-9>M. The sensor has excellent stability and repeatability.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrochemical luminescence sensors, and in particular relates to a method for constructing ruthenium triple pyridine electrochemical luminescence sensors with graphene porous materials. Background technique [0002] Electrochemiluminescence is a process in which a substance undergoes an electron transfer reaction on the surface of an electrode to form an excited state and emits light. It is chemiluminescence caused directly or indirectly by an electrochemical reaction. Ruthenium tertiary pyridine electrochemiluminescence retains the advantages of chemiluminescence such as high sensitivity, Wide linear range, convenient observation, simple instrument, etc., and has its own characteristics such as good reproducibility, stable reagents, easy control, low detection limit, etc., so it is widely used in food, drug and environmental testing. Compared with liquid ruthenium terpyridine ECL system,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 钱磊林杰陆璐吴海坤
Owner SHANDONG UNIV
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