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Nano platinum-cobalt/porous gold/graphene composite material and preparation method thereof

A composite material and nano-platinum technology, which is applied in the field of nano-materials, can solve the problems of unstable nano-platinum catalyst, high cost of precious metal platinum, and complicated preparation process, so as to shorten the effective contact distance, improve catalytic performance, flexibility and stability. Effect

Inactive Publication Date: 2017-05-31
江苏丰格测控技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, the current preparation process of supported catalytic materials based on platinum and other noble metal nanoparticles is generally complicated, the cost of noble metal platinum is high, nano-platinum catalysts are unstable and easy to lose during use, and platinum catalysts are easy to adsorb intermediate products in the oxidation process of glucose. and cause catalyst poisoning, etc., which limit its large-scale application

Method used

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  • Nano platinum-cobalt/porous gold/graphene composite material and preparation method thereof
  • Nano platinum-cobalt/porous gold/graphene composite material and preparation method thereof
  • Nano platinum-cobalt/porous gold/graphene composite material and preparation method thereof

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Embodiment 1

[0056] 1. A nano-platinum-cobalt / porous gold / graphene composite material, consisting of graphene paper loaded with porous gold and platinum-cobalt alloy nanoparticles deposited on its surface, the platinum-cobalt nanoparticles grow in granular form on the porous gold carrier .

[0057] 2. A preparation method of nano-platinum-cobalt / porous gold / graphene composite material, comprising the following steps:

[0058] (1) Prepare graphene oxide with the improved Hummers method, get a certain volume of graphene oxide solution and drop-coat it on a glass sheet to dry naturally, peel it off to get graphene oxide paper, and use the graphene oxide paper obtained with hydroiodic acid (HI ) for 2 hours, washed repeatedly with absolute ethanol and ultrapure water, and dried for later use.

[0059] (2) The Au-Ag alloy leaf was treated with concentrated HNO 3 Corroded for 6 hours, washed 3 times with ultrapure water for later use.

[0060] (3) Lay the washed porous gold on the graphene pape...

Embodiment 2

[0076] 1. A nano-platinum-cobalt / porous gold / graphene composite material, consisting of graphene paper loaded with porous gold and platinum-cobalt alloy nanoparticles deposited on its surface, the platinum-cobalt nanoparticles grow in granular form on the porous gold carrier .

[0077] 2. A preparation method of nano-platinum-cobalt / porous gold / graphene composite material, comprising the following steps:

[0078] (1) Prepare graphene oxide with the improved Hummers method, get a certain volume of graphene oxide solution and drop-coat it on a glass sheet to dry naturally, peel it off to get graphene oxide paper, and use the graphene oxide paper obtained with hydroiodic acid (HI ) for 2 hours, washed repeatedly with absolute ethanol and ultrapure water, and dried for later use.

[0079] (2) The Au-Ag alloy leaf was treated with concentrated HNO 3 Corroded for 6 hours, washed 3 times with ultrapure water for later use.

[0080] (3) Lay the washed porous gold on the graphene pa...

Embodiment 3

[0084] 1. A nano-platinum-cobalt / porous gold / graphene composite material, consisting of graphene paper loaded with porous gold and platinum-cobalt alloy nanoparticles deposited on its surface, the platinum-cobalt nanoparticles grow in granular form on the porous gold carrier .

[0085] 2. A preparation method of nano-platinum-cobalt / porous gold / graphene composite material, comprising the following steps:

[0086] (1) Prepare graphene oxide with the improved Hummers method, get a certain volume of graphene oxide solution and drop-coat it on a glass sheet to dry naturally, peel it off to get graphene oxide paper, and use the graphene oxide paper obtained with hydroiodic acid (HI ) for 2 hours, washed repeatedly with absolute ethanol and ultrapure water, and dried for later use.

[0087] (2) The Au-Ag alloy leaf was treated with concentrated HNO 3 Corroded for 6 hours, washed 3 times with ultrapure water for later use.

[0088] (3) Lay the washed porous gold on the graphene pa...

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Abstract

The invention relates to a nano platinum-cobalt / porous gold / graphene composite material and a preparation method thereof. The nano platinum-cobalt / porous gold / graphene composite material is used for manufacturing glucose-detection graphene composite paper electrodes and assembling electrochemical blood sugar sensors. The method comprises the following steps: supporting a nano porous gold film on the surface of high-strength high-flexibility high-stability high-electric-conductivity graphene paper, and growing platinum-cobalt bimetal nanoparticles on the nano porous gold film in situ by one-step electrodeposition, thereby obtaining the nano porous alloy / graphene paper-like composite material. The nano porous alloy supported on the graphene paper has high electrocatalytic oxidizing capacity on glucose; the glucose can generate an obvious catalytic current on the composite paper electrode surface; the magnitude of the current density has favorable linear relationship with the glucose concentration; and thus, when the electrode prepared from the nano platinum-cobalt / porous gold / graphene composite material is used for assembling the electrochemical glucose sensor system, the electrochemical glucose sensor system can be used for determining the glucose in the human blood sample in a stable, sensitive, accurate and fast way.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a nano-platinum-cobalt / porous gold / graphene composite material and a preparation method thereof, which are used for assembling electrodes of glucose sensors. Background technique [0002] According to IDF statistics, in 2015, there were about 415 million people with diabetes in the world, and China ranked first in the world, and 1.3 million people died of diabetes and its complications. It is predicted that by 2040, 642 million people in the world will suffer from diabetes. Diabetic patients in China will also reach 151 million. Therefore, the development of blood glucose monitoring instruments and auxiliary equipment with independent intellectual property rights not only has great scientific research value, but also has good social benefits and broad commercial application prospects. [0003] With the continuous innovation of analytical methods, the continuous...

Claims

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Application Information

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IPC IPC(8): G01N27/327B82Y30/00C01B32/19
CPCG01N27/3278B82Y30/00
Inventor 冯国栋肖菲
Owner 江苏丰格测控技术有限公司
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