Anti-interference and fast-response breath hydrogen sensor
A hydrogen sensor, fast response technology, applied in the field of exhaled hydrogen sensor, can solve the problems of poor anti-interference ability and stability, long response time, poor anti-interference ability, etc., and achieve short exhalation and analysis time, strong anti-interference ability. , good stability
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Embodiment 1
[0034] This example shows how to prepare the electrochemical H2 sensor shown in Figure 1 according to the description of the present invention.
[0035] In this example, nickel powder was used as catalyst and template, combined with chemical vapor deposition technology to prepare three-dimensional porous graphene. Weigh an appropriate amount of nickel powder into a ceramic boat treated with acetone and alcohol, and place it in the heating zone of the tube furnace. The air in the tube was pumped out, and then the pressure in the tube was flushed to normal pressure with argon, the valve was opened, and the argon gas was continued to maintain an inert atmosphere until the reaction was completed. Under the protection of argon, the temperature of the tube furnace is raised to 900°C at a rate of 30°C / min. During the heating process, hydrogen gas is started. After the temperature reaches 900°C, the temperature is maintained and the nickel powder is annealed for 25 minutes. After ann...
Embodiment 2
[0039] This embodiment describes the preparation of 5 H2 sensors with and without gas filter devices according to the method described in Example 1, which are respectively applied to the detection of standard H2.
[0040] Ten H2 sensors were energized and aged for 14 days under the condition that the working electrode was 0mV relative to the reference electrode, and then the following performance tests were carried out on the aging board with 0mV bias:
[0041] a) Use air as the carrier gas to configure 40ppm standard H2 gas, and use the above-mentioned 5 sensors with gas filter devices to test, the performance results of the test are shown in Table 1. It can be seen from Table 1 that the T90 of the sensor is less than 15s, and the resolution R is less than 0.5ppm. Such as figure 2 The curve in shows a typical response curve of a sensor. The results show that the prepared H2 sensor with gas filter has high sensitivity, short response time and high precision.
[0042] Table...
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Abstract
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