Sensor for hydrazine detection, nitrogen-doped porous carbon loaded copper-cobalt nano composite material and preparation method and application thereof

A technology of nitrogen-doped porous carbon and nanocomposite materials, applied in the direction of nanotechnology for sensing, nanotechnology, analytical materials, etc., can solve the complex synthesis process, narrow linear response range, electrochemical sensing sensitivity and selection It can solve the problem of low stability and achieve the effect of simple preparation process, good stability and repeatability, and excellent electrocatalysis

Active Publication Date: 2021-02-19
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the existing electrochemical analysis method for the determination of hydrazine by the electrode modification reagents, such as complex synthesis process, low sensitivity and selectivity of electrochemical sensing, and narrow linear response range, and provide a sensor for hydrazine detection. , Nitrogen-doped porous carbon-supported copper-cobalt nanocomposite material and its preparation method and application

Method used

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  • Sensor for hydrazine detection, nitrogen-doped porous carbon loaded copper-cobalt nano composite material and preparation method and application thereof
  • Sensor for hydrazine detection, nitrogen-doped porous carbon loaded copper-cobalt nano composite material and preparation method and application thereof
  • Sensor for hydrazine detection, nitrogen-doped porous carbon loaded copper-cobalt nano composite material and preparation method and application thereof

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preparation example Construction

[0036] to combine figure 1 , the preparation method of nitrogen-doped porous carbon-loaded copper-cobalt nanocomposite material of the present invention, specifically comprises the following steps:

[0037] (1) Preparation of ZIF-8:

[0038] Weigh Zn(NO 3 ) 2 ·6H 2 O was dissolved in methanol, and the methanol solution containing 2-methylimidazole (30-40mM) was quickly added. After stirring and reacting, the solution gradually changed from colorless to white turbidity. After standing for a certain period of time, the supernatant was discarded, and the product Washing with methanol and drying in vacuo gave ZIF-8.

[0039] (2) Preparation of ZIF-8-derived nitrogen-doped porous carbon nanopolyhedra (NPC):

[0040] Weigh a certain amount of ZIF-8, grind it fully in a mortar, place it in a tube furnace, raise the temperature to 750-850°C at a rate of 4-6°C / min under a nitrogen atmosphere, and continue to react for 1-3 hours. The remaining black powder is dispersed in hydrochl...

Embodiment 1

[0048] The preparation method of the nitrogen-doped porous carbon-supported copper-cobalt nanocomposite material of this embodiment specifically includes the following steps:

[0049] (1) Weigh 1.488g Zn(NO 3 ) 2 ·6H 2 Dissolve O (5mM) in 80mL of methanol, quickly add 2.874g of 2-methylimidazole (35mM) in 40mL of methanol solution, stir and react for 20min, the solution gradually turns from colorless to white turbid, let stand for 24h, discard The supernatant and the product were washed three times with methanol, and dried in vacuum at 50° C. for 12 hours to obtain ZIF-8.

[0050] (2) Weigh a certain amount of ZIF-8 and fully grind it in a mortar for 30 minutes, then place it in a tube furnace and raise the temperature to 800°C at a rate of 5°C / min under a nitrogen atmosphere, and continue to react for 2 hours. The black powder was dispersed in 0.5M hydrochloric acid solution and stirred for 48 hours to remove residual zinc oxide or zinc. Finally, the product was washed thr...

Embodiment 2

[0067] The preparation method of the nitrogen-doped porous carbon-supported copper-cobalt nanocomposite material of this embodiment specifically includes the following steps:

[0068] (1) Weigh 1.488g Zn(NO 3 ) 2 ·6H 2 Dissolve O (5mM) in 70mL methanol, quickly add 2.463g 2-methylimidazole (30mM) in 35mL methanol solution, stir and react for 15min, the solution gradually turns from colorless to white turbid, let stand for 22h, discard The supernatant and the product were washed three times with methanol, and dried in vacuum at 40° C. for 15 hours to obtain ZIF-8.

[0069] (2) Weigh a certain amount of ZIF-8 and fully grind it in a mortar for 30 minutes, place it in a tube furnace and raise the temperature to 750°C at a rate of 5°C / min under a nitrogen atmosphere, and continue to react for 2.5 hours. The black powder was dispersed in 0.5M hydrochloric acid solution and stirred for 45 hours to remove residual zinc oxide or zinc. Finally, the product was washed three times wit...

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Abstract

The invention discloses a sensor for hydrazine detection, a nitrogen-doped porous carbon loaded copper-cobalt nano composite material and a preparation method and application thereof, and belongs to the technical field of inorganic material synthesis. According to the nitrogen-doped porous carbon loaded copper-cobalt nano composite material, nitrogen-doped porous carbon NPC serves as a substrate material, Cu and Co nano particles are loaded on the surface of the NPC, and the NPC is of a polyhedral hollow structure; the preparation method of the composite material comprises the following steps:adding soluble copper salt, cobalt salt and an adhesive into a nitrogen-doped porous carbon material, reacting, and carrying out liquid-phase reduction on hydrazine hydrate in a hydrothermal system.The composite material can be used as a modifier to realize high-sensitivity and high-selectivity electrochemical quantitative determination of hydrazine, and has the advantages of favorable dispersity, low consumption, simple preparation method, mild reaction conditions and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of inorganic material synthesis, and specifically relates to a sensor for hydrazine detection, a nitrogen-doped porous carbon-loaded copper-cobalt nanocomposite material, and a preparation method and application thereof. Background technique [0002] Hydrazine, also known as hydrazine, is a water-soluble small molecular compound containing N-N bonds. It is widely used in industry, agriculture, medicine and even military fields. However, hydrazine hydrate is also a highly toxic substance, which can easily enter the human body through the respiratory system and food chain. , can damage human health even at low concentrations, and it has been confirmed that hydrazine is a neurotoxic substance with carcinogenic and mutagenic effects, which can cause serious environmental and health problems. Therefore, it is of great research significance to establish a sensitive and reliable system for the quantitative detectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48B82Y15/00B82Y40/00
CPCG01N27/308G01N27/48B82Y15/00B82Y40/00
Inventor 吴芳辉王淼孙文斌文国强任美娟查习文
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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