mesoporous cuo/sno 2 Adsorption sensitization sensor and detection method
A sensor and sensor base technology, applied in the direction of material resistance, can solve the problem that the performance of sensitive materials is not enough to detect ultra-low concentration gases, and achieve the effects of high microscopic order, reduced power consumption, and large specific surface area
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Embodiment 1
[0065] In this example, mesoporous CuO / SnO 2 The total mass of CuO in the sensitive material 13 is 0.1%, 0.2%, 0.5%, 1%, 2%, and 3% respectively; the number of turns of the platinum wire coil 2 is 20; figure 2 shown. During the measurement, the sensor is connected with the first current source, and the output current is 150mA.
[0066] Mesoporous CuO / SnO 2 The specific preparation process of sensitive materials is as follows:
[0067] CuO / SnO 2 / SBA-15 composite material preparation
[0068] 1) 0.7g SnCl 2 2H 2 O was added to 10 mL of ethanol and stirred in a water bath at 40°C for 5 min until the solution was clear
[0069] 2) Add 0.0025g Cu(NO 3 ) 2 Add to the above solution and stir for 20min until the solution is clear and mixed evenly.
[0070] 3) Add 0.4g of SBA-15 powder into the above solution and stir until the ethanol is completely volatilized.
[0071] 4) The solution obtained in step (3) was taken out and heated in a muffle furnace at a temperature of 4...
Embodiment 2
[0085] In this example, mesoporous CuO / SnO 2 CuO accounts for 0.2% of the total mass in the sensitive material 13; the number of turns of the platinum wire coil 2 is 20; as figure 2 shown. During the measurement, the sensor is connected to the first current source, and the output currents are 100mA, 120mA, 140mA, 150mA, 160mA, and 180mA.
[0086] Mesoporous CuO / SnO 2 The specific preparation process of sensitive materials is as follows:
[0087] CuO / SnO 2 / SBA-15 composite material preparation
[0088] 1) 0.7g SnCl 2 2H 2 O was added to 10 mL of ethanol and stirred in a water bath at 40°C for 5 min until the solution was clear
[0089] 2) Add 0.005g Cu(NO 3 ) 2 Add to the above solution and stir for 20min until the solution is clear and mixed evenly.
[0090] 3) Add 0.4g of SBA-15 powder into the above solution and stir until the ethanol is completely volatilized.
[0091] 4) The solution obtained in step (3) was taken out and heated in a muffle furnace at a temper...
Embodiment 3
[0104] In this example, mesoporous CuO / SnO 2 CuO accounts for 0.2% of the total mass in the sensitive material 13; the number of turns of the platinum wire coil 2 is 15; as figure 2 As shown, the output current of the first current source is 100mA, the output current of the second current source is 30mA, the output pulse signal period of the microcontroller is 210s, the pulse width of the high temperature period is 90s, and the temperature is 150°C; the pulse width of the low temperature period is 120s, and the temperature is 30°C.
[0105] Mesoporous CuO / SnO 2 The specific preparation process of sensitive materials is as follows:
[0106] CuO / SnO 2 / SBA-15 composite material preparation
[0107] 7) 0.7g SnCl 2 2H 2 O was added to 10 mL of ethanol and stirred in a water bath at 40°C for 5 min until the solution was clear
[0108] 8) 0.0025g Cu(NO 3 ) 2 Add to the above solution and stir for 20min until the solution is clear and mixed evenly.
[0109] 9) Add 0.4g of ...
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