A self-reduction preparation method of tin dioxide nanoflower gas-sensitive material loaded with gold nanoparticles
A gold nanoparticle, tin dioxide technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, analytical materials, etc., can solve problems such as difficult experiments, material pollution, etc. Lifting, Facilitating Adsorption and Transfer
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Embodiment 1
[0025] (1) Dissolve 10mmol of sodium citrate in 20ml of deionized water, and add 0.12g of sodium hydroxide. Dissolve 5mmol of stannous chloride in 20ml of ethanol. After the two solutions were completely dissolved, the ethanol solution was added to the aqueous solution and stirred at room temperature for 1 h.
[0026] (2) The solution obtained in step (1) was transferred to a 50ml reactor, reacted at 180°C for 12h, and then cooled naturally to room temperature.
[0027] (3) The product obtained in step (2) was centrifuged and washed several times with deionized water and ethanol, and dried at 60° C. for 12 hours to obtain tin trioxide nanoflowers.
[0028] (4) Ultrasonically disperse 0.1 g of the powder obtained in step (3) in 20 ml of deionized water to obtain a suspension.
[0029] (5) Add chloroauric acid solution (concentration: 10 mg / ml) to the suspension obtained in step (4), stir at room temperature for 1 h, and control the atomic ratio of gold and tin to 1:100.
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Embodiment 2
[0034] (1) Dissolve 10mmol of sodium citrate in 20ml of deionized water, and add 0.14g of sodium hydroxide. Dissolve 5mmol of stannous chloride in 20ml of ethanol. After the two solutions were completely dissolved, the ethanol solution was added to the aqueous solution and stirred at room temperature for 1 h.
[0035] (2) The solution obtained in step (1) was transferred to a 50ml reactor, reacted at 180°C for 12h, and then cooled naturally to room temperature.
[0036] (3) The product obtained in step (2) was centrifuged and washed several times with deionized water and ethanol, and dried at 60° C. for 12 hours to obtain tin trioxide nanoflowers.
[0037] (4) Ultrasonically disperse 0.1 g of the powder obtained in step (3) in 20 ml of deionized water to obtain a suspension.
[0038] (5) Add chloroauric acid solution (concentration: 10 mg / ml) to the suspension obtained in step (4), stir at room temperature for 1 h, and control the atomic ratio of gold and tin to 0.5:100.
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Embodiment 3
[0042] (1) Dissolve 10mmol of sodium citrate in 20ml of deionized water, and add 0.16g of sodium hydroxide. Dissolve 5mmol of stannous chloride in 20ml of ethanol. After the two solutions were completely dissolved, the ethanol solution was added to the aqueous solution and stirred at room temperature for 1 h.
[0043] (2) The solution obtained in step (1) was transferred to a 50ml reactor, reacted at 180°C for 12h, and then cooled naturally to room temperature.
[0044] (3) The product obtained in step (2) was centrifuged and washed several times with deionized water and ethanol, and dried at 60° C. for 12 hours to obtain tin trioxide nanoflowers.
[0045] (4) Ultrasonically disperse 0.1 g of the powder obtained in step (3) in 20 ml of deionized water to obtain a suspension.
[0046] (5) Add chloroauric acid solution (concentration: 10 mg / ml) to the suspension obtained in step (4), stir at room temperature for 1 h, and control the atomic ratio of gold and tin to 1.5:100.
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