Humidity sensor of CeO2/g-C3N4 hybrid membrane as well as preparation method and application thereof

A humidity sensor, g-c3n4 technology, applied in chemical instruments and methods, sensors, applications, etc., can solve the problems of poor uniformity, large difference between sensor batches, poor compatibility, etc., and achieve recovery time advantage, wide monitoring range, The effect of repeatability advantage

Active Publication Date: 2020-09-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the surface of the humidity sensor in the above-mentioned patent uses indium oxide-graphene oxide. Among them, graphene oxide is an organic material. Although it has good hydrophilicity, it does not crystallize and has poor uniformity. There are large differences between batches of sensors, and indium oxide is an inorganic material, so the compatibility between indium oxide and graphene oxide is poor, which seriously affects the sensitivity and range of the prepared sensor

Method used

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  • Humidity sensor of CeO2/g-C3N4 hybrid membrane as well as preparation method and application thereof
  • Humidity sensor of CeO2/g-C3N4 hybrid membrane as well as preparation method and application thereof
  • Humidity sensor of CeO2/g-C3N4 hybrid membrane as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] a CeO 2 / g -C 3 N 4 The application of the hybrid film in the humidity sensor. The humidity sensor includes a substrate, a humidity-sensitive material bonded to the substrate, and a resistance value detection device connected to the humidity-sensitive material. The humidity-sensitive material is prepared from cerium oxide and graphite carbonitride Cerium oxide-graphite carbonitride hybrid film.

[0071] g-C 3 N 4 It is an inorganic material with good semiconductor performance, high thermal conductivity and chemical stability, and can be made into a humidity sensor for humidity detection. However, its specific surface area is low and its hydrophilicity is not as good as the graphene oxide material in the background technology. Therefore, it is made The range and sensitivity of the humidity sensor is not high, but also because g-C 3 N 4 It is an inorganic material, so its uniformity is good, adding CeO 2 After that, g-C 3 N 4 The hydrophilicity has been significa...

Embodiment 2

[0102] The same part of this embodiment and embodiment 1 will not be repeated, and its difference is: the humidity sensor is applied to the motion state monitoring device:

[0103] To assess an athlete's training intensity and physiology, monitoring of physical parameters is often required. As one of the most important monitoring indicators, respiration and heart rate are closely related to various metabolic activities of the body. Athletes can achieve optimal training results by monitoring and controlling breathing and heart rate. To this end, a self-powered combined respiration and heart rate detection system is designed, such as Figure 5a shown. The pedal generator vividly simulates the cycling process of athletes. A humidity sensor is installed on the athlete's mask, and a heart rate monitor is installed on the athlete's pulse point to monitor and analyze the athlete's breathing and heart rate in real time. Athletes ride at different speeds for one minute using the te...

Embodiment 3

[0105] The same part of this embodiment and embodiment 1 will not be repeated, and the difference is that the humidity sensor is applied to the human skin dryness monitoring device:

[0106] Combined with the concept of wearable, design and manufacture flexible nano-humidity sensor. It fits the skin better and also improves the comfort of use. It not only improves the accuracy of skin dryness detection, but also adapts to the dryness detection requirements of different parts of the body. Figure 6a is a flexible wearable skin dryness detection device. The device can be worn on the forehead, neck, arms and knees to detect how dry the skin is while running. During a 30-minute run, the forehead was chosen as the primary detection site for dry skin. The change of the sensor capacitance response value at different operating speeds is as follows: Figure 6b shown. It can be seen that as the running speed increases, under the influence of skin sweat secretion, the capacitance res...

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Abstract

The invention relates to the technical field of humidity detection sensors, in particular to a humidity sensor of a CeO2/g-C3N4 hybrid membrane as well as a preparation method and application thereof.The humidity sensor comprises a substrate, a humidity-sensitive material combined on the substrate and a resistance value detection device communicated with the humidity-sensitive material, wherein the humidity-sensitive material is a cerium oxide-graphite carbonitride hybrid membrane prepared from cerium oxide and graphite carbonitride. The humidity sensor of the CeO2/g-C3N4 hybrid membrane hasa wider humidity monitoring range, and when the relative humidity (RH) is increased from 0% to 97%, the response value of the sensor is close to 7000. Compared with a traditional humidity sensor, thesensor has obvious advantages in the aspects of sensitivity, stability, responsiveness, repeatability, recovery time and the like.

Description

technical field [0001] The invention relates to the technical field of humidity detection sensors, in particular to a CeO 2 / g -C 3 N 4 Humidity sensor of hybrid film and its preparation method and application. Background technique [0002] In recent years, the potential applications of wearable electronic devices in the fields of human health, health assessment, and exercise monitoring have attracted more and more attention. They can continuously record a person's physiological markers. In particular, the rapid development of various flexible sensor designs has greatly expanded the application of flexible wearable devices in novel soft electronic systems. [0003] Water is an indispensable substance for life on earth and plays a vital role in human health. Therefore, measuring humidity has become a common practice in healthcare, such as respiratory monitoring, motion detection, skin dryness testing, etc. Water molecules play an extremely important role in the metaboli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/235C01B21/082A61B5/00A61B5/0205A61B5/08
CPCA61B5/0205A61B5/024A61B5/08A61B5/0816A61B5/443C01B21/0605C01P2002/72C01P2002/85C01P2004/03C01P2004/04C01P2004/80
Inventor 张冬至王兴伟孟维琦殷英达吴尚原马晓东刘嘉文明世杰季俊廷缪妍婧
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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