Preparation method of nickel-doped zinc oxide material for detecting hydrogen

A technology of zinc oxide and sodium hydroxide, which is applied in the field of material chemistry, can solve problems such as responsiveness research, and achieve the effects of good repeatability, low raw material prices, and easy industrial production

Active Publication Date: 2017-09-08
苏州中车氢能动力技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Scientists have studied the sensitivity of zinc oxide to different gas...

Method used

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  • Preparation method of nickel-doped zinc oxide material for detecting hydrogen
  • Preparation method of nickel-doped zinc oxide material for detecting hydrogen
  • Preparation method of nickel-doped zinc oxide material for detecting hydrogen

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1 Preparation of nano-short rod-shaped nickel-doped zinc oxide material of the present invention

[0021] Weigh zinc nitrate (3mmol), nickel nitrate (3mmol), potassium hydrogen phthalate (1.5mmol) and sodium hydroxide (6mmol) into 25-30mL water, stir and dissolve, heat to reflux temperature, and after 6 hours of reflux reaction , be cooled to room temperature, obtain solid through centrifugation, after solid is washed 2 times with distilled water, be placed in 50 ℃ of vacuum ovens and dry after 12 hours to obtain nano short rod-shaped nickel-doped zinc oxide ( figure 2 ).

Embodiment 2

[0022] Example 2 Preparation of nano-short rod-shaped nickel-doped zinc oxide material of the present invention

[0023] Weigh zinc nitrate (12mmol), nickel nitrate (12mmol), potassium hydrogen phthalate (6mmol) and sodium hydroxide (24mmol) into 200-240mL water, stir and dissolve, heat to reflux temperature, and after reflux reaction for 8 hours, After being cooled to room temperature, the solid was obtained by centrifugation. After the solid was washed 3 times with distilled water, it was placed in a vacuum oven at 70°C and dried for 16 hours to obtain nano-short rod-shaped nickel-doped zinc oxide (morphology and figure 2 basically the same).

Embodiment 3

[0025] Weigh zinc nitrate (3mmol), nickel nitrate (3mmol), potassium hydrogen phthalate (3mmol) and sodium hydroxide (6mmol) into 25-30mL water, stir and dissolve, heat to reflux temperature, and after reflux reaction for 6 hours, After being cooled to room temperature, the solid was obtained by centrifugation. After the solid was washed twice with distilled water, it was placed in a vacuum oven at 50°C and dried for 12 hours to obtain nanofibrous nickel-doped zinc oxide ( image 3 ).

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Abstract

The invention relates to a preparation method of a nickel-doped zinc oxide material for detecting hydrogen. The preparation method comprises the following steps of adding zinc nitrate, nickel nitrate, potassium hydrogen phthalate and sodium hydroxide into a proper amount of water to be stirred and dissolved; heating the mixed solution to a reflux temperature; after reflux reaction is carried out for 6-8 h, cooling the mixed solution to the room temperature, and obtaining a solid through centrifugal sedimentation; after the solid is washed 2-3 times with distilled water, placing the solid into a vacuum drying oven at the temperature of 50-70 DEG C to be dried for 12-16 h, and then, obtaining nanometer short-bar-shaped nickel-doped zinc oxide. The molar ratio of the zinc nitrate to the nickel nitrate to the potassium hydrogen phthalate to the sodium hydroxide is 1:1:0.5:2. The usage amount of the water is 10-20 times the mass sum of the zinc nitrate, the nickel nitrate, the potassium hydrogen phthalate and the sodium hydroxide.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a preparation method of a nickel-doped zinc oxide material used for detecting hydrogen. Background technique [0002] Under normal temperature and pressure, hydrogen is an extremely flammable, colorless, transparent, odorless and tasteless gas. Hydrogen is a highly explosive gas when mixed with air at a concentration of 4% to 74%, or mixed with oxygen at a concentration of 5% to 95%, and is easily detonated under the stimulation of heat, sunlight or sparks. Therefore, it is very important to develop a hydrogen detector with high sensitivity and good repeatability. [0003] The adsorption of certain gases on the surface of metal oxide semiconductors can lead to changes in the resistivity of semiconductors. Nano-sized metal oxide semiconductors are stable, reliable and easy to obtain, and are often used to prepare sensitive film materials for Quartz Crystal Microbalan...

Claims

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Application Information

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IPC IPC(8): C01G53/04C01G9/02G01N27/30B82Y40/00
CPCB82Y40/00C01G9/02C01G53/04C01P2004/03C01P2004/10C01P2004/16C01P2004/34C01P2004/61C01P2004/64G01N27/301
Inventor 王元有封娜周培徐嘉琪周慧尹依雯
Owner 苏州中车氢能动力技术有限公司
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