Rare-earth-doped ZnO nanocrystal temperature and humidity sensing material and preparation method thereof

A nanocrystalline material and humidity sensing technology, which is applied in the direction of luminescent materials, chemical instruments and methods, measuring devices, etc., can solve the problems of temperature sensitivity, humidity response range, and unsatisfactory response speed performance, and achieve high sensitivity and easy operation , The effect of simple preparation process

Active Publication Date: 2016-02-03
DALIAN NATIONALITIES UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, there are few sensitive materials with dual sensing characteristics of temperature and humidity, and the performance of temperature sensitivity, humidity response range, and response speed is not ideal.

Method used

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  • Rare-earth-doped ZnO nanocrystal temperature and humidity sensing material and preparation method thereof
  • Rare-earth-doped ZnO nanocrystal temperature and humidity sensing material and preparation method thereof
  • Rare-earth-doped ZnO nanocrystal temperature and humidity sensing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh 1.0975mg zinc acetate (Zn(OAc) 2 2H 2 O), 0.0443mg erbium nitrate (Er(NO 3 ) 3 ·5H 2 O) and 0.4490mg ytterbium nitrate (Yb(NO 3 ) 3 ·5H 2 (0), the above-mentioned weighed material is dissolved in 50mL of diethylene glycol (DEG) and stirred until completely dissolved, then loaded into a microwave reactor with a reflux device, and heated at a rate of 100° C. / min under normal pressure to 150°C and hold at this temperature for 5 minutes. After the heat preservation is completed, cool to room temperature, centrifuge the suspension prepared above, remove the supernatant, and then put it into an absolute ethanol solution for 10 minutes according to the concentration ratio of 0.5g / L; The ethanol suspension was further centrifuged, the supernatant was removed, and dried in a drying oven at 100° C. for 2 hours to obtain a rare earth-doped ZnO nanocrystal material.

Embodiment 2

[0029] Weigh 1.4875mg zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 0.0416mg erbium acetate (Er(OAc) 3 4H 2 O) and 0.4222mg ytterbium acetate (Yb(OAc) 3 4H 2 (0), the above-mentioned weighed material is dissolved in 50mL of diethylene glycol (DEG) and stirred until completely dissolved, then loaded into a microwave reactor with a reflux device, and heated at a rate of 80°C / min under normal pressure to 180°C and hold at this temperature for 5 minutes. After the heat preservation is completed, cool to room temperature, centrifuge the suspension prepared above, remove the supernatant, and then put it into an absolute ethanol solution for 10 minutes according to the concentration ratio of 0.5g / L; The ethanol suspension was further centrifuged, the supernatant was removed, and dried in a drying oven at 100° C. for 2 hours to obtain a rare earth-doped ZnO nanocrystal material.

[0030] From figure 1 From the scanning electron micrographs of the temperature and humidity sensing materia...

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Abstract

A rare-earth-doped ZnO nanocrystal temperature and humidity sensing material is a mono-dispersed nanometer spherical rare-earth-ion-doped ZnO nanocrystal material which is obtained by conducting a fast reaction on a ZnO raw material, erbium salt and ytterbium salt at the molar ratio of 100:2:20 and has temperature and humidity sensing properties. A peroration method of the material includes the following steps that the ZnO raw material, the erbium salt and the ytterbium salt are added into organic solvent diethylene glycol, then an obtained solution is charged into a microwave reactor with a reflux device, the solution is fast heated to 120-180 DEG C at the rate of 60-100 DEG C/min at normal pressure and kept at the temperature for 5 min, obtained turbid liquid is subjected to centrifugal separation, obtained nanocrystal powder is put into absolute ethyl alcohol to be subjected to ultrasonic treatment for 20 min, supernate is removed, and then drying is conducted for 2 h. The preparation method is simple in process, easy to implement, low in cost and high in speed, and the prepared mono-dispersed nanometer spherical rare-earth-doped ZnO nanocrystal has high temperature and humidity sensing properties.

Description

technical field [0001] The invention relates to a temperature and humidity dual sensing material and a preparation method thereof. Background technique: [0002] Temperature and humidity are very important physical parameters. The measurement of temperature and humidity is closely related to daily life. It is widely used in industrial and agricultural production, weather forecast, climate analysis, environmental monitoring, military and aerospace and other fields. As the core part of temperature and humidity measurement - temperature and humidity sensitive materials, not only need to have high temperature and humidity sensing characteristics, but also sensitive materials with dual sensing characteristics of temperature and humidity are also the development requirements of multi-parameter detection. Temperature-sensitive materials are materials that convert temperature into other measurable quantities by using the law that various physical properties of substances change with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/54C09K11/78G01D21/02
Inventor 曹保胜
Owner DALIAN NATIONALITIES UNIVERSITY
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