A pt-sno for detecting low-concentration hydrogen sulfide gas at room temperature 2 Preparation method of gas sensor
A gas sensor, pt-sno2 technology, is applied in the field of preparation of mesoporous tin dioxide nanoflower gas-sensing materials, which can solve the problems of unsatisfactory gas sensing performance, high working temperature, poor selectivity, etc., and achieve excellent gas Sensitive performance, lower working temperature, fast response and recovery
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Embodiment 1
[0030] (1) Mesoporous SnO 2 Preparation of nanoflowers: In this experiment, we used two surfactants, PVP and P123, to prepare hierarchical SnO with mesoporous structure by a dual-template method. 2 nanoflowers. First, 5 mmol NaOH was added to a mixed solution of 80 mL absolute ethanol and deionized water (1:1) under magnetic stirring. Second, 1.0 g PVP and 0.5 g P123 were introduced into the above solution, respectively. After the solution was completely mixed, 20 mmol Na 3 C 6 h 5 o 7 2H 2 O and 10 mmol SnCl 2 2H 2 O was dissolved into the above solution and kept stirring for 1 h. The prepared mixed solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel reactor, kept at 180 °C for 12 h, and naturally cooled to room temperature after the reaction was completed. The resulting precipitate was collected by centrifugation, washed several times with deionized water and absolute ethanol, and dried at 60 °C for 6 h. Finally, the precipitate was ...
Embodiment 2
[0041] (1) Mesoporous SnO 2 Preparation of nanoflowers: In this experiment, we used two surfactants, PVP and P123, to prepare hierarchical SnO with mesoporous structure by a dual-template method. 2 nanoflowers. First, 5 mmol NaOH was added to a mixed solution of 80 mL absolute ethanol and deionized water (1:1) under magnetic stirring. Second, 1.0 g PVP and 0.5 g P123 were introduced into the above solution, respectively. After the solution was completely mixed, 20 mmol Na 3 C 6 h 5 o 7 2H 2 O and 10 mmol SnCl 2 2H 2 O was dissolved into the above solution and kept stirring for 1 h. The prepared mixed solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel reactor, kept at 180 °C for 12 h, and naturally cooled to room temperature after the reaction was completed. The resulting precipitate was collected by centrifugation, washed several times with deionized water and absolute ethanol, and dried at 60 °C for 6 h. Finally, the precipitate was ...
Embodiment 3
[0047] (1) Mesoporous SnO 2 Preparation of nanoflowers: In this experiment, we used two surfactants, PVP and P123, to prepare hierarchical SnO with mesoporous structure by a dual-template method. 2 nanoflowers. First, 5 mmol NaOH was added to a mixed solution of 80 mL absolute ethanol and deionized water (1:1) under magnetic stirring. Second, 1.0 g PVP and 0.5 g P123 were introduced into the above solution, respectively. After the solution was completely mixed, 20 mmol Na 3 C 6 h 5 o 7 2H 2 O and 10 mmol SnCl 2 2H 2 O was dissolved into the above solution and kept stirring for 1 h. The prepared mixed solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel reactor, kept at 180 °C for 12 h, and naturally cooled to room temperature after the reaction was completed. The resulting precipitate was collected by centrifugation, washed several times with deionized water and absolute ethanol, and dried at 60 °C for 6 h. Finally, the precipitate was ...
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