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Temperature and pH value dual-stimulation responsive flexible laccase electrode and construction method

A dual-stimuli-response and stimulus-response technology, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of low enzyme loading, reduced efficiency of electron transfer to electrodes, poor stability, etc., to achieve good catalytic performance and meet load stability Good performance and stability

Inactive Publication Date: 2018-06-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the "on / off" functional enzyme biofuel cell currently studied is only a conceptual battery
On the one hand, because the current enzyme electrode itself has low enzyme loading, low electron transfer efficiency, and easy enzyme detachment, the enzyme fuel cell constructed based on this inevitably has application bottlenecks such as low open circuit voltage, low power density, and poor stability.
On the other hand, the electrochemical responsiveness of responsive enzyme electrodes generally depends on the stimuli-responsive polymer on the surface of the electrode. The worse the electrical performance, the lower the efficiency of electron transfer to the electrode; in addition, the stimuli-responsive polymer brush The modification method on the electrode is mostly drop coating, the interaction between the prepared response layer and the electrode is small, and it is easy to fall off during use, resulting in serious attenuation of the "on / off" function of the electrode, and "on / off" less effective

Method used

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  • Temperature and pH value dual-stimulation responsive flexible laccase electrode and construction method
  • Temperature and pH value dual-stimulation responsive flexible laccase electrode and construction method
  • Temperature and pH value dual-stimulation responsive flexible laccase electrode and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Implementation example 1: Reaction flow chart such as figure 1 Shown.

[0023] a. Pretreatment of the nickel foam electrode: Cut the electrode-grade foam nickel into an appropriate size, and sonicate it in acetone, 0.5mM sulfuric acid, ultrapure water, and in 0.1mM NiCl 4 Soak in the aqueous solution for 4 hours, then take it out and let it dry naturally;

[0024] b. Preparation of nano-gold deposition solution: add 40 μL of 10 mg / mL chloroauric acid solution to 10 ml of K with a pH of 8 2 HPO 4 -KH 2 PO 4 In the buffer solution, stir to completely dissolve and blow in nitrogen until saturation, to obtain a nano gold deposition solution;

[0025] c. Preparation of nano-gold hybrid nickel foam electrode: Take the electrode processed in step a as the working electrode, the platinum column electrode as the counter electrode, and the silver / silver chloride electrode as the reference electrode to construct a three-electrode system, and use cyclic voltammetry to construct a three-ele...

Embodiment 2

[0029] Implementation example 2: Reaction flow chart such as figure 1 Shown.

[0030] a. Pretreatment of the nickel foam electrode: Cut the electrode-grade foam nickel into an appropriate size, and sonicate it in acetone, 0.5mM sulfuric acid, ultrapure water, and in 0.1mM NiCl 4 Soak in the aqueous solution for 4 hours, then take it out and let it dry naturally;

[0031] b. Preparation of nano-gold deposition solution: add 40μL of 10mg / mL chloroauric acid solution to 10ml of K with a pH of 8 2 HPO 4 -KH 2 PO 4 In the buffer solution, stir to completely dissolve and blow in nitrogen until saturation, to obtain a nano gold deposition solution;

[0032] c. Preparation of nano-gold hybrid nickel foam electrode: Take the electrode processed in step a as the working electrode, the platinum column electrode as the counter electrode, and the silver / silver chloride electrode as the reference electrode to construct a three-electrode system, and use cyclic voltammetry to construct a three-electr...

Embodiment 3

[0036] Implementation Example 3: Reaction flow chart as figure 1 Shown.

[0037] a. Pretreatment of the nickel foam electrode: Cut the electrode-grade foam nickel into an appropriate size, and sonicate it in acetone, 0.5mM sulfuric acid, ultrapure water, and in 0.1mM NiCl 4 Soak in the aqueous solution for 4 hours, then take it out and let it dry naturally;

[0038] b. Preparation of nano-gold deposition solution: add 40μL of 10mg / mL chloroauric acid solution to 10ml of K with a pH of 8 2 HPO 4 -KH 2 PO 4 In the buffer solution, stir to completely dissolve and blow in nitrogen until saturation, to obtain a nano gold deposition solution;

[0039] c. Preparation of nano-gold hybrid nickel foam electrode: Take the electrode processed in step a as the working electrode, the platinum column electrode as the counter electrode, and the silver / silver chloride electrode as the reference electrode to construct a three-electrode system, and use cyclic voltammetry to construct a three-electrode s...

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PUM

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Abstract

The invention relates to a temperature and pH value dual-stimulation responsive flexible laccase electrode and a construction method. According to the method, the dual-stimulation responsive laccase electrode is prepared on a flexible foam nickel conductive substrate through free radical electro-copolymerization, and laccase is fixed in a covalent bond manner, so that the electrode stability can be better met. One temperature-stimulation responsive monomer and two pH-stimulation responsive monomers are selected and subjected to free radical electro-copolymerization on the surface of the laccase electrode, and the prepared stimulation responsive laccase electrode has good on / off performance, has the catalytic peak current of 0.000771 A in a 20 mM glucose solution and has good catalytic performance. The electrode has the catalytic peak current only decreased by 6.49% in 10 times of on / off cycles and has good stability. The electrode can meet the cathode use requirement in EBFCs (enzymatic biofuel cells).

Description

Technical field [0001] The invention belongs to the technical field of preparation of flexible stimulation-responsive enzyme electrodes, relates to a temperature and pH dual stimulation-responsive flexible laccase electrode and a construction method, and relates to an electro-induced free radical copolymerization to prepare a temperature and pH dual stimulation-responsive polymer The method of membrane modified enzyme electrode. Background technique [0002] Enzyme bioelectrode is an electrode constructed with biologically active enzymes instead of precious metal catalysts. The electrode can catalyze the oxidation-reduction reaction of the substrate in the physiological body fluid environment, and convert its gain and loss electrons into electrical signal output. The battery constructed with this electrode is the enzyme biofuel cell (EBFC). This type of battery is currently the most potential green and renewable micro fuel cell that can be used for implanting small medical devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M8/16
CPCH01M4/8605H01M4/8825H01M8/16Y02E60/50
Inventor 马晓燕陈影索鸿飞屈枫锦
Owner NORTHWESTERN POLYTECHNICAL UNIV
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