Mixed potential type room-temperature NO sensor with (Ni < 1-x > Fe < x >)-MOF as sensitive electrode and preparation method of mixed potential type room-temperature NO sensor
A technology of mixed potential type and sensitive electrode, which is applied in K2Fe4O7 based mixed potential type room temperature NO sensor and its preparation, in the field of home and convenient detection of asthma in medical diagnosis and treatment, which can solve the problems of gas composition changes and high power consumption, and achieve reduction Effects of power consumption, convenient detection, and good electrocatalytic activity
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Embodiment 1
[0041] Preparation of K by hydrothermal method 2 Fe 4 o 7 and Ni-MOF materials, using Ni-MOF as a sensitive electrode material to make K 2 Fe 4 o 7 Based on the hybrid potentiometric NO sensor, and test the gas sensing performance of the sensor, the specific process is as follows:
[0042] 1.K 2 Fe 4 o 7 Fabrication of the substrate: 4.0g Fe(NO 3 ) 3 9H 2 O was added to 32 mL of distilled water, and 68 g of KOH was gradually added with constant stirring. Then, the mixture was transferred to a high temperature and high pressure resistant stainless steel autoclave, the reaction temperature was 240° C., and the reaction time was 48 h. After the reaction was completed, the resulting precipitate was washed with distilled water and dried at 70°C. will get K 2 Fe 4 o 7 The bulk material is ground to obtain K 2 Fe 4 o 7 The ultrafine powder, and the ultrafine powder is pressed into a round K with a diameter of 13mm by a tablet press 2 Fe 4 o 7 Substrate, and cut i...
Embodiment 2
[0048] The manufacturing process of the device is the same as that of Example 1, and the sensitive electrode material Ni-MOF is replaced by the sensitive electrode material NiFe-MOF1. The preparation process of sensitive electrode material NiFe-MOF1 is as follows:
[0049] Preparation of sensitive electrode material NiFe-MOF1: Weigh 0.372g of Ni(OAc) 2 4H 2 O and 0.125g FeSO 4 ·7H 2 O was added to 30 mL of deionized water and stirred until a homogeneous solution was obtained. At the same time, 0.125 g of terephthalic acid was added to 30 mL of N-N dimethylacetamide and kept stirring. Terephthalic acid solution and Ni(OAc) 2 The solutions were mixed and stirred to obtain a uniform mixed solution. The above mixed solution was transferred to a stainless steel reactor, and reacted at 150° C. for 3 h. After cooling to room temperature, the product was alternately centrifuged with deionized water and ethanol. Finally, dry at 60 °C to obtain the sensitive electrode material N...
Embodiment 3
[0051] The manufacturing process of the device is the same as that of Example 1, and the sensitive electrode material Ni-MOF is replaced by the sensitive electrode material NiFe-MOF2. The preparation process of sensitive electrode material NiFe-MOF2 is as follows:
[0052] Preparation of sensitive electrode material NiFe-MOF2: Weigh 0.372g of Ni(OAc) 2 4H 2 O and 0.498g FeSO 4 ·7H 2 O was added to 30 mL of deionized water and stirred until a homogeneous solution was obtained. At the same time, 0.125 g of terephthalic acid was added to 30 mL of N-N dimethylacetamide and kept stirring. Terephthalic acid solution and Ni(OAc) 2 The solutions were mixed and stirred to obtain a uniform mixed solution. The above mixed solution was transferred to a stainless steel reactor, and reacted at 150° C. for 3 h. After cooling to room temperature, the product was alternately centrifuged with deionized water and ethanol. Finally, dry at 60°C to obtain the sensitive electrode material Ni...
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