Room-temperature NO2 sensor based on graphene-coated alpha-Fe2O3 compound and preparation method thereof
A graphene-coated, -fe2o3 technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of high working temperature and limited practical application, and achieve low cost, suitable for mass production, fast carrier The effect of migration rate
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[0041] Α-Fe coated with graphene 2 O 3 The compound is used as a sensitive material to make room temperature NO 2 Sensor, its specific production process:
[0042] 1. Add 182 mg of ferric nitrate nonahydrate to 20 mL of deionized water and stir for 45 minutes to obtain a uniform ferric nitrate solution; take 10 mg of freeze-dried graphene oxide powder and add it to 20 mL of deionized water and ultrasonicate for 45 minutes to obtain Homogeneous and transparent graphene oxide solution; take 10mL of graphene oxide solution and slowly add dropwise to the above 20mL ferric nitrate solution, and continue to stir for 45 minutes; then, the resulting mixed solution is reacted in a water bath at 80°C for 6 hours to obtain a homogeneous, Viscous dark red solution;
[0043] 2. The dark red solution obtained in step 1 was hydrothermally reacted at 180℃ for 16 hours, cooled to room temperature and centrifuged at high speed to obtain a precipitate. The precipitate was washed with deionized water ...
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