Supported silver nanonet, and preparation method and application thereof

A technology of loaded silver and nano-network, which is applied in the field of nano-silver, can solve problems such as difficult handling and high energy consumption, and achieve rapid response, low cost and good repeatability

Active Publication Date: 2015-09-16
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the main method of carbon dioxide reduction is electrochemical reduction, and metal nanoparticles and nanonets are the main catalysts for electrochemical reduction. Among them, the electrode with silver nanostructure has good catalytic performance. According to reports (Q.Lu, et al. , Nature Communications,5(2014).), the silver network structure obtained by corroding aluminum-silver alloy with hydrochloric acid is used for the electrochemical reduction of carbon dioxide, which has a better catalytic effect than the conventional silver nanoparticle electrode, but it requires silver and aluminum Melting in a certain proportion involves high energy consumption and produces corrosive solution residues that are not easy to handle. In view of the advantages and disadvantages of the mesh electrode, the simple method of the present invention to obtain the silver mesh electrode can reduce the production cost of the silver electrode

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  • Supported silver nanonet, and preparation method and application thereof
  • Supported silver nanonet, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0027] (1) First cut the ITO into 0.8×1.5cm 2 , among which, the extra part is the contact area of ​​the electrode clamp of the workstation, and the effective working area is about 0.8×1mm 2 , and then placed in acetone, ethanol, and deionized water for ultrasonic treatment for 5 minutes, and then exposed to air to dry naturally;

[0028] (2) Prepare 20 mL of copper sulfate solution containing n-propanol, wherein the mol ratio of n-propanol to copper sulfate is 100:1, and ITO is sandwiched in an electrochemical workstation as a working electrode, and its reference electrode and counter electrode are respectively Ag|AgCl, platinum sheet, and the front of ITO are aligned with the platinum sheet counter electrode with a distance of 2cm, and the reference electrode is in the middle, and put into the electrolytic cell. After adding the electrolyte, apply a voltage of -0.3V to the working electrode for 5 minutes. At this time, there is a layer of yellow substance on the ITO, which ...

Embodiment 2

[0031] (1) First cut the ITO into 0.8×1.5cm 2 , among which, the extra part is the contact area of ​​the electrode clamp of the workstation, and the effective working area is about 0.8×1mm 2 , and then placed in acetone, ethanol, and deionized water for ultrasonic treatment for 5 minutes, and then exposed to air to dry naturally;

[0032] (2) Prepare 20 mL of copper sulfate solution containing n-propanol, wherein the mol ratio of n-propanol to copper sulfate is 150:1, and ITO is sandwiched in an electrochemical workstation as a working electrode, and its reference electrode and counter electrode are respectively Ag|AgCl, platinum sheet, and the front of ITO are aligned with the platinum sheet counter electrode with a distance of 2cm, and the reference electrode is in the middle, and put into the electrolytic cell. After adding the electrolyte, apply a voltage of -0.3V to the working electrode for 5 minutes. At this time, there is a layer of yellow substance on the ITO, which ...

Embodiment 3

[0035] (1) First cut the ITO into 0.8×1.5cm 2 , among which, the extra part is the contact area of ​​the electrode clamp of the workstation, and the effective working area is about 0.8×1mm 2 , and then placed in acetone, ethanol, and deionized water for ultrasonic treatment for 15 minutes, and then exposed to air to dry naturally;

[0036](2) Prepare 20 mL of copper sulfate solution containing n-propanol, wherein the mol ratio of n-propanol to copper sulfate is 200:1, and ITO is sandwiched in an electrochemical workstation as a working electrode, and its reference electrode and counter electrode are respectively Ag|AgCl, platinum sheet, ITO face to the platinum sheet counter electrode, the distance is 2cm, the reference electrode is in the middle, and put into the electrolytic cell; after adding the electrolyte, apply a voltage of -0.2V to the working electrode for 5min , At this time, there is a layer of yellow substance on the ITO, which is cuprous oxide. Take out the ITO ...

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Abstract

The invention discloses a supported silver nanonet, and a preparation method and application thereof. The preparation method comprises the following steps: by using a copper sulfate-n-propanol mixed solution as an electrolyte, Ag/AgCl as a reference electrode, a platinum sheet as a counter electrode and ITO (indium tin oxide) as a work electrode, preparing cuprous oxide nano cubes supported on an ITO substrate by a constant voltage process, cleaning the surface, drying in a vacuum drying oven, adding silver nitrate to sufficiently react by using the cuprous oxide nano cubes supported on the ITO substrate as a template and reducer, taking out, cleaning with deionized water, and carrying out vacuum drying to obtain the ITO-supported net silver nano structure which is the supported silver nanonet. The material can be used for electrochemical reduction of carbon dioxide. The net silver nano structure electrode material has application potential in electrochemical catalytic reduction of carbon dioxide. The preparation method is simple to operate and easy to control, and does not generate any toxic substance.

Description

technical field [0001] The invention belongs to the field of nano-silver, and in particular relates to a loaded silver nano-network and a preparation method and application thereof. Background technique [0002] At present, fossil energy is the main form of energy utilization in the world, and the limited storage capacity is gradually being exhausted, and the large amount of carbon dioxide produced during the combustion of fossil fuels is the chief culprit of the greenhouse effect. The world is facing both the greenhouse effect and the energy crisis. Under the great challenge, converting carbon dioxide into clean liquid alcohol energy is an effective way, and at the same time, it has become extremely important. According to a survey, between 2000 and 2004, the annual growth rate of global carbon dioxide emissions was 3.2%. Scientists predict that global carbon dioxide emissions will reach 40 billion tons in 2030. As one of the fastest-growing developing countries at the beg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/08C23C18/44C25B11/08
Inventor 刘启明吴国星杨三军
Owner WUHAN UNIV
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