A method for improving the temperature-sensitive properties of graphene oxide with n and mo
A graphene and characteristic technology, which is applied to thermometers, thermometers, and electrical devices that use electrical/magnetic components that are directly sensitive to heat. It can solve the problems of small feedback signal current, increase measurement accuracy, and effectively measure large temperatures. range, the effect of increasing the feedback current
Image
Examples
Embodiment 1
[0025] Step 1: Prepare doped graphene oxide powder, the steps are as follows: add 50g / L graphite powder and 20g / L potassium permanganate to obtain a mixed solution in the concentrated sulfuric acid with a mass fraction of 98%, and the above mixed solution is successively added at 10 / L After stirring for 1 hour at 30 / 90 degrees Celsius, add 30% hydrogen peroxide with a mass fraction equal to the volume of the mixed solution, take out the precipitate after standing for 5 days, ultrasonicate for 2 hours, centrifugal filter and dry to obtain graphene oxide powder.
[0026] Step 2: Utilize NO 2 The gas N-doped graphene oxide, the steps are as follows: put the graphene oxide powder into the tube furnace, under the pressure of 50Pa NO 2 Heated to 800°C in the atmosphere, then kept the temperature for 5 minutes, cooled to room temperature, and took it out.
[0027] Step 3: Using MoCl 3 Doping graphene oxide with Mo, the steps are as follows: MoCl 3 Dissolve in THF and prepare a sol...
Embodiment 2
[0031] The preparation method and test are the same as in Example 1, but the doping steps in Step 2 and Step 3 are omitted. figure 2 The resistivity measured at different temperatures of the graphene oxide block prepared in this implementation is provided in the present embodiment, it can be seen that the resistivity changes with the temperature, but the degree of nonlinearity is larger than that of Example 1, In the low temperature area, the resistivity rises very fast, and it is close to 10 at 0°C. 8 Ωcm order of magnitude, while the resistivity change is not obvious in the high temperature zone, and the overall temperature sensitivity is worse than that of Example 1. Comparing Example 1 and Example 2, it can be seen that co-doping significantly improves the temperature-sensitive properties of graphene oxide.
Embodiment 3
[0033] The preparation method and test are the same as in Example 1, but the doping link in Step 2 is omitted. image 3 The resistivity measured at different temperatures of the graphene oxide block prepared in this implementation is given in the figure. It can be seen that the resistivity changes with the temperature, but the degree of nonlinearity is greater than that of Example 1.
PUM
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Description
Claims
Application Information
- IPC
- G01K7/22
- Inventors
- 倪磊; 杨甜甜