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Preparation method of humidity sensing material based on ultrathin titanium dioxide nanosheets

A titanium dioxide and humidity sensing technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, and material analysis using radiation diffraction, to achieve excellent hysteresis performance, good humidity sensitivity performance, and easy deviceization

Inactive Publication Date: 2017-03-15
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, electronic materials exhibit significant quantum confinement effects as the scale decreases

Method used

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  • Preparation method of humidity sensing material based on ultrathin titanium dioxide nanosheets
  • Preparation method of humidity sensing material based on ultrathin titanium dioxide nanosheets
  • Preparation method of humidity sensing material based on ultrathin titanium dioxide nanosheets

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Effect test

Embodiment 1

[0035] a. Dissolve polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) in absolute ethanol at a molar ratio of 1:3, and stir magnetically at room temperature for 30 minutes until completely dissolved A colorless and transparent A solution was formed;

[0036] b. Cool concentrated hydrochloric acid to 10°C and add it to tetrabutanol titanate at a molar ratio of 2:1, then place the mixed solution in a water bath to stir, control the temperature of the water bath to 10°C, and stir for 30 minutes to obtain colorless Transparent B solution;

[0037] c. Add the colorless and transparent solution A in step a dropwise to the solution B in the step, stir magnetically until the mixture is uniform, then place the mixed solution in a water bath, control the temperature of the water bath to 0°C, and stir for 30 minutes to obtain color transparent liquid;

[0038] d. Add the colorless transparent liquid obtained in step c to ethylene glycol at a volume rati...

Embodiment 2

[0043] a. Dissolve polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) in absolute ethanol at a molar ratio of 1:3, and stir magnetically at room temperature for 30 minutes until completely dissolved A colorless and transparent A solution was formed;

[0044] b. Cool concentrated hydrochloric acid to 0°C and add it to tetrabutyl titanate at a molar ratio of 2:1, then place the mixed solution in a water bath to stir, control the temperature of the water bath to 0°C, and stir for 30 minutes to obtain colorless Transparent B solution;

[0045] c. Add the colorless and transparent solution A in step a to the solution B in step b dropwise, stir magnetically until evenly mixed, then place the mixed solution in an ice bath, control the temperature of the ice bath to 0°C, and stir 10min, obtain colorless transparent liquid;

[0046] d. Add the colorless transparent liquid obtained in step c to ethylene glycol at a volume ratio of 1:1 to obtain a visco...

Embodiment 3

[0050] a. Dissolve polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) in absolute ethanol at a molar ratio of 1:3, and stir magnetically at room temperature for 30 minutes until completely dissolved A colorless and transparent A solution was formed;

[0051] b. Cool concentrated hydrochloric acid to 5°C and add it to tetrabutanol titanate at a molar ratio of 2:1, then place the mixed solution in a water bath to stir, control the temperature of the water bath to 20°C, and stir for 30 minutes to obtain colorless Transparent B solution;

[0052] c. Add the colorless and transparent solution A in step a to the solution B in step b dropwise, stir magnetically until evenly mixed, then place the mixed solution in a water bath, control the temperature of the water bath to 50°C, and stir for 60 minutes. A colorless transparent liquid was obtained;

[0053] d. Add the colorless transparent liquid obtained in step c to ethylene glycol at a volume ratio ...

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Abstract

The present invention relates to a preparation method of a humidity sensing material based on ultrathin titanium dioxide nanosheets. The preparation method comprises the steps of preparing a humidity sensing material for ultrathin titanium dioxide nanosheets through one-step hydrothermal method, using polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) as a surfactant and ethylene glycol to adjust grain growth in order to obtain large specific surface area and improve the surface defects, thereby enhancing the humidity-sensing properties of the material. The humidity sensing material for ultrathin titanium dioxide nanosheets obtained by using the method of the invention can provide sensitive detection of 11% to 95% humidity at room temperature (25 DEG C) in 1 second, and the preparation method has the advantages of low working temperature, wide temperature response range, high sensitivity, and high detection limit. The humidity sensing material using ultrathin titanium dioxide nanosheets is a function material for air humidity sensors. By measuring the change in the resistance of a material when water vapor is adsorbed to the surface of the material under different humidity, the humidity is sensed.

Description

technical field [0001] The invention relates to the fields of functional material science and gas-sensing sensing materials, in particular to a method for preparing a humidity sensing material based on ultra-thin titanium dioxide nanosheets. Background technique [0002] Humidity is a very important parameter when studying environmental problems, and it is also an important factor affecting human survival, production and life. For people's lives, if the atmosphere is too dry or too humid, people will feel uncomfortable and even get sick. Generally speaking, the indoor temperature and humidity that make people feel the most comfortable is that the temperature in winter is 20 to 25°C and the relative humidity is 30% to 80%; the temperature in summer is 23 to 30°C and the relative humidity is 30% to 60%. In industrial and agricultural production, due to differences in occasions and items, there are also different requirements for humidity. For example, excessive humidity can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00G01N23/20
CPCC01G23/053C01P2002/72C01P2002/80C01P2004/03C01P2004/20C01P2006/12C01P2006/17G01N23/20
Inventor 郭亚楠宫淼淼窦新存
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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