A gas sensitive material for nitrogen dioxide sensor and preparation method thereof
A gas-sensitive material and nitrogen dioxide technology, which is applied in material resistance, material analysis, material analysis by electromagnetic means, etc., can solve the problems of low detection sensitivity, and achieve high sensitivity, cost control, and mature process methods. Effect
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Embodiment 1
[0039] In the preparation process of a sensing material, the sensing material is prepared by a solvothermal method. The solvent used was a mixture of 15 mL of high-purity water and 25 mL of absolute ethanol, the tin source used was 4 mmol of stannous chloride, the acid-base regulator was 4 mmol of sodium hydroxide, and the surfactant was 2 mmol of sodium citrate. After the above materials were mixed and stirred for 30 min, they were transferred to a 50 mL reaction kettle, kept in an oven at 180 °C for 12 h, and then cooled to room temperature. Subsequently, the precipitated product was subjected to centrifugation and cleaning, respectively, using high-purity water and ethanol for centrifugation and cleaning for a total of 6 times, and then dried in an oven at 70°C for 10 hours. After drying, the material was placed in a porcelain boat and calcined in a tube furnace at a calcining temperature of 600° C. and a calcining time of 2 h. After the calcination is completed, cool to r...
Embodiment 2
[0042] In the preparation process of a sensing material, the sensing material is prepared by a solvothermal method. The solvent used was 40 mL of high-purity water, the tin source used was 4 mmol of stannous sulfate, the acid-base regulator was 4 mmol of potassium hydroxide, and the surfactant was 10 mmol of cetyltrimethylammonium bromide. The above materials were mixed and stirred for 60 min, then transferred to a 50 mL reaction kettle, kept in an oven at 200° C. for 18 h, and then cooled to room temperature. Subsequently, the worthwhile products were centrifuged and washed, respectively, with high-purity water and ethanol for a total of 4 times, and then dried in an oven at 70°C for 10 hours. After drying, the material was placed in a porcelain boat and calcined in a tube furnace at a calcining temperature of 500° C. for 5 hours. After calcination, cool to room temperature, take a small amount of material, use water as solvent and grind it into a paste with a mortar, and co...
Embodiment 3
[0045] In the preparation process of a sensing material, the sensing material is prepared by a solvothermal method. The solvent used was a mixture of 5 mL of high-purity water and 35 mL of absolute ethanol, the tin source used was 4 mmol of stannous fluoride, the acid-base regulator was 4 mmol of sodium hydroxide, and the surfactant was 4 mmol of sodium citrate. After the above materials were mixed and stirred for 60 min, they were transferred to a reaction kettle, kept in an oven at 220 °C for 8 h, and then cooled to room temperature. Subsequently, the precipitated product was subjected to centrifugation and cleaning, respectively, using high-purity water and ethanol for centrifugation and cleaning for a total of 5 times, and then dried in an oven at 70°C for 10 hours. After drying, the material was placed in a porcelain boat and calcined in a tube furnace at a calcining temperature of 700°C for 1.5 hours. After the calcination is completed, cool to room temperature, take a ...
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