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Preparation method of Cu-GN metal nanosheet electrocatalyst

A metal nano, electrocatalyst technology, applied in metal processing equipment, nano carbon, nano technology and other directions, can solve problems such as high energy consumption, and achieve the effect of improving electrical conductivity, mild conditions and less energy consumption

Active Publication Date: 2022-02-25
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term electrolysis and enhanced current density can further reduce nitrite and promote its conversion to nitrogen and ammonia, but these processes lead to higher energy consumption. The above issues highlight the need to develop efficient, selective, and stable electrocatalysts. Low applied current, short electrolysis time and ideal to drive NO3RR and ideal product

Method used

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  • Preparation method of Cu-GN metal nanosheet electrocatalyst
  • Preparation method of Cu-GN metal nanosheet electrocatalyst
  • Preparation method of Cu-GN metal nanosheet electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step (1) the graphene oxide dispersion liquid that concentration is 2g / L is melted in deionized water, forms the first solution; The volume ratio of graphene oxide dispersion liquid and deionized water is 1:0.5;

[0020] Step (2) According to the addition ratio of 10 grams per liter, copper chloride dihydrate is added to the first solution, and ultrasonic 30min is formed to form the second solution;

[0021] Step (3) Freeze the second solution in liquid nitrogen for 10 minutes, and then transfer it to a freeze dryer for 96 hours;

[0022] Step (4) moving the freeze-dried product into a tube furnace, and calcining for 4h under an ammonia atmosphere at 600°C;

[0023] Step (5) Add deionized water, isopropanol, and naphthol solution to the calcined product in sequence, and the addition ratio is 150 ml of deionized water, 80 ml of isopropanol, and 12 ml of naphthol solution per gram of product, and ultrasonically for 30 minutes , to obtain Cu-GN metal nanosheet electrocata...

Embodiment 2

[0025] Step (1) the graphene oxide dispersion liquid that concentration is 3g / L is melted in deionized water, forms the first solution; The volume ratio of graphene oxide dispersion liquid and deionized water is 1:0.8;

[0026] Step (2) According to the addition ratio of 100 grams per liter, copper chloride dihydrate is added to the first solution, and ultrasonic 60min is formed to form the second solution;

[0027] Step (3) freezing the second solution in liquid nitrogen for 30 minutes, and then transferring it to a freeze dryer for 48 hours;

[0028] Step (4) moving the freeze-dried product into a tube furnace, and calcining at 800°C for 2h under an ammonia atmosphere;

[0029] Step (5) Add deionized water, isopropanol, and naphthol solution to the calcined product successively, and the addition ratio is 200 milliliters of deionized water, 65 milliliters of isopropanol, and 15 milliliters of naphthol solution per gram of product, and ultrasonication for 60 minutes , to obta...

Embodiment 3

[0031] Step (1) the graphene oxide dispersion liquid that concentration is 2.5g / L is melted in deionized water, forms the first solution; The volume ratio of graphene oxide dispersion liquid and deionized water is 1:0.3;

[0032] Step (2) According to the addition ratio of 50 grams per liter, copper chloride dihydrate was added to the first solution, and the ultrasonic wave was used for 20 minutes to form a second solution;

[0033] Step (3) Freeze the second solution in liquid nitrogen for 20 minutes, then transfer it to a freeze dryer for 60 hours;

[0034] Step (4) moving the freeze-dried product into a tube furnace, and calcining for 3 hours in an ammonia atmosphere at 700°;

[0035] Step (5) Add deionized water, isopropanol, and naphthol solution to the calcined product successively, and the addition ratio is 180 milliliters of deionized water, 50 milliliters of isopropanol, and 10 milliliters of naphthol solution per gram of product, and ultrasonically for 20 minutes , ...

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Abstract

The invention discloses a preparation method of a Cu-GN metal nanosheet electrocatalyst. The method comprises the following steps: firstly, dissolving a graphene oxide dispersion liquid in deionized water to form a first solution; adding copper chloride dihydrate into the first solution to form a second solution; freezing the second solution in liquid nitrogen, and transferring into a freeze dryer for freezing; calcining the freeze-dried product in an ammonia gas atmosphere at 600-800 DEG C for 2-4 hours; sequentially adding deionized water, isopropanol and a naphthol solution, and performing ultrasonic treatment to obtain the Cu-GN metal nanosheet electrocatalyst. The synthesis method provided by the invention has the characteristics of simple process, low energy consumption, mild conditions, good product morphology and the like, and is suitable for large-scale production and application.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a preparation method of a Cu-GN metal nanosheet electrocatalyst. Background technique [0002] Nitrate pollution in surface and groundwater is widespread throughout the world, resulting from inappropriate discharge of fertilizer runoff, stormwater runoff, and wastewater from industries such as fertilizer, nuclear power, and metal processing plants. Nitrate pollution in surface water and groundwater is widespread in the world, which originates from improper discharge of fertilizer runoff, stormwater runoff, and industrial (such as fertilizer, nuclear energy, and metal processing plants) wastewater, seriously threatening ecological balance and human health. To minimize this adverse effect, a number of methods have been employed to remove nitrates from water. Due to its synergy, biological denitrification is the most widely used process, but there are also technical problems such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091B22F1/054B22F1/12B82Y30/00B82Y40/00C01B32/184C25B1/01C25B1/27
CPCC25B11/091C25B1/27C25B1/01C01B32/184B82Y40/00B82Y30/00Y02E60/36
Inventor 叶伟徐梦秋
Owner HANGZHOU NORMAL UNIVERSITY
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