Trimethylamine gas sensor based on PdRu bimetallic nanoparticle modified SnO2 nanoparticle cluster and preparation method of trimethylamine gas sensor
A bimetallic nanometer and gas sensor technology, applied in the direction of air quality improvement, material resistance, etc., can solve the problems of repeatability and long-term stability improvement, low selectivity, etc., to achieve enhanced selectivity, simple manufacturing process, and improved sensitivity Effect
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Embodiment 1
[0037] (1) 0.81g of tin chloride pentahydrate (SnCl 4 ·5H 2 O) and 0.6 g urea (CH 4 N 2 O) was dissolved in 30 mL of deionized water and stirred at room temperature for 20 minutes; the mixed solution was transferred to a 50 mL stainless steel autoclave lined with Teflon, placed in an oven and heated at 160 °C for 12 hours After that, it was naturally cooled to room temperature under standard atmospheric conditions, centrifuged at 15,000 rpm for 10 minutes, and the precipitated product was washed three times with deionized water and absolute ethanol; the transparent gel-like product was dried in an oven at 80 °C overnight, and the powder product was dried at 600 °C calcined for 2 hours to obtain SnO 2 Nanoparticle clusters;
[0038] (2) Dissolve 444 mg of PVP in 100 mL of triethylene glycol (C 6 H 14 O 4 ), under the condition of magnetic stirring, the solution was heated to 200 °C in an oil bath; 147.3 mg of Na 2 [PdCl 4 ], and 131.1 mg RuCl 3 ·xH 2 O is evenly mixe...
Embodiment 2
[0045] SnO was prepared according to the method of Example 1 2 Nanoparticle clusters and PdRu bimetallic nanoparticles, changing the modification ratio; 100 mg step SnO 2 The nanoclusters were dissolved in 3 mL of anhydrous ethanol, and stirred vigorously to disperse them uniformly, and 1.0 mL of 2 mg·mL was added dropwise. -1 mixed solution of PdRu and ethanol, and thoroughly sonicated after vigorous stirring; dried at 80 °C overnight, after which the powder was collected and annealed at 450 °C in a muffle furnace at a heating rate of 5 °C / min for 4 hours, resulting in 0.2wt% PdRu-SnO 2 Gas sensing material; device preparation and testing methods are the same as in Example 1.
Embodiment 3
[0047] SnO was prepared according to the method of Example 1 2Nanoparticle clusters and PdRu bimetallic nanoparticles, changing the modification ratio; 100 mg step SnO 2 The nanoclusters were dissolved in 3 mL of anhydrous ethanol, and stirred vigorously to disperse them uniformly, and 1.5 mL of 2 mg·mL was added dropwise. -1 mixed solution of PdRu and ethanol, and thoroughly sonicated after vigorous stirring; dried at 80 °C overnight, after which the powder was collected and annealed at 450 °C in a muffle furnace at a heating rate of 5 °C / min for 4 hours, resulting in 0.3wt% PdRu-SnO 2 Gas sensing material; device preparation and testing methods are the same as in Example 1.
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