an ag-sno 2 -The preparation method of rgo aerogel gas-sensing material
A gas-sensitive material, aerogel technology, applied in nanotechnology for materials and surface science, analytical materials, material resistance, etc., can solve the problems of difficult practical application, small specific surface area, long recovery time, etc. Good gas sensing performance, high electron mobility, and the effect of reducing impurities
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example 1
[0034] Add 10 mL of deionized water to the beaker, then use an electronic balance to weigh 0.5259 g of tin tetrachloride pentahydrate, 0.1019 g of silver nitrate and 0.216 g of urea, stir the solution at 500 rpm for 30 minutes, add 2 mL of ethanol, and stir for 10 minutes Then add 14.4mL of 5mg / mL graphene oxide solution, and after stirring for 2h, add ammonia water dropwise at a speed of 0.1mL / s to adjust the pH value to 11, and continue stirring for 30min at a temperature of 50°C and a frequency of 100Hz. After ultrasonic treatment for 30min, poured into a hydrothermal reaction kettle with a volume of 50mL, and reacted at 180°C for 12h. After the reaction kettle was cooled to room temperature, the gel was taken out, immersed in a mixed solution with an alcohol-water ratio of 1:5 for aging, and the aging solution was replaced on time every day, and the aging process was 5 days. The sample was placed in a 10mL small beaker and placed in a freeze dryer for drying. The drying te...
example 2
[0041] Add 15mL of deionized water to the beaker, then weigh 0.4207g of tin tetrachloride, 0.0815g of silver nitrate and 0.634g of ascorbic acid with an electronic balance, stir the solution at 500rpm for 35min, add 2mL of methanol, stir for 15min and then add 9mL of 8mg / mL graphene oxide solution, after stirring for 2.5h, add ammonia water dropwise at a speed of 0.15mL / s to adjust the pH value to 10, continue stirring for 10min and then ultrasonically treat it at a temperature of 40°C and a frequency of 120Hz 40min, then poured into a hydrothermal reaction kettle with a volume of 50mL, and reacted at 120°C for 10h. After the reaction kettle was cooled to room temperature, the gel was taken out, immersed in a mixed solution with an alcohol-water ratio of 1:4 for aging, and the aging solution was replaced on time every day, and the aging process was 3 days. The samples were placed in a 10 mL small beaker and placed in a freeze dryer for drying. The drying temperature was set to...
example 3
[0043] Add 10 mL of deionized water to the beaker, then use an electronic balance to weigh 0.3506 g of tin tetrachloride pentahydrate, 0.0679 g of silver chloride and 0.324 g of urea, stir the solution at 550 rpm for 40 minutes, add 3 mL of ethanol, and stir for 20 minutes Then add 24 mL of 3 mg / mL graphene oxide solution, and after stirring for 3 hours, add ammonia water dropwise at a speed of 0.2 mL / s to adjust the pH value to 12, and continue stirring for 15 min at a temperature of 60 °C and a frequency of 80 Hz. After ultrasonic treatment for 45min, poured into a hydrothermal reaction kettle with a volume of 50mL, and reacted at 140°C for 12h. After the reaction kettle was cooled to room temperature, the gel was taken out, immersed in a mixed solution with an alcohol-water ratio of 1:6 for aging, and the aging solution was replaced on time every day, and the aging process was 4 days. The sample was placed in a 10mL small beaker and placed in a freeze dryer for drying. The ...
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