A High Performance Silica-SnO2 Hydrogen Sensor
A gas sensor, high-performance technology, applied in the field of hydrogen sensors, which can solve the problems of poor hydrogen sensitivity and selectivity
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Embodiment 1
[0047] A screen-printed mesoporous SiO 2 Surface-modified high-performance SnO 2 The hydrogen sensor preparation process, the specific steps are as follows:
[0048] 1) Weigh an appropriate amount of 0.05g of mesoporous SiO with an electronic balance 2 For powder, transfer the material to an agate mortar. According to ink and mesoporous SiO 2 The mass ratio of powder is 10:1. Weigh the printing ink, grind it quickly and vigorously, and grind the printing ink and powder evenly;
[0049] Mesoporous SiO 2 Preparation: Using tetraethyl orthosilicate (TEOS) as the silicon source and cetyltrimethylammonium bromide (CTAB) as the surfactant, mesoporous SiO was prepared by the sol-gel method. 2 , the preparation process is as follows: Weigh 1.000g CTAB and dissolve it in 150ml deionized water, add 15ml ethanol and magnetically stir for 5min, add dropwise 6ml ammonia water and stir for 20min, after stabilization, slowly add 4ml TEOS to the above solution, continue stirring for 2h t...
Embodiment 2
[0056] A screen-printed mesoporous SiO 2 Surface-modified high-performance SnO 2 The hydrogen sensor preparation process, the specific steps are as follows:
[0057] 1) Weigh an appropriate amount of 0.05g of mesoporous SiO with an electronic balance 2 For powder, transfer the material to an agate mortar. According to ink and mesoporous SiO 2 The mass ratio of powder is 10:1. Weigh the printing ink, grind it quickly and forcefully, and grind the printing ink and powder evenly. ;
[0058] 2) The resulting slurry is printed on the SnO prepared in the comparative example by screen printing. 2 Gas sensor surface;
[0059] 3) The sensor is dry. Put the printed sensor into an electric blast drying oven, and dry it at 60°C for 10 minutes;
[0060] 4) Repeat steps (2) and (3) to print a layer of mesoporous SiO 2 SnO 2 The gas sensor is overprinted to 6 layers.
[0061] 5) 6 layers of mesoporous SiO will be printed 2 SnO 2 The gas sensor substrate was placed in the air to ...
Embodiment 3
[0064] A screen-printed mesoporous SiO 2 Surface-modified high-performance SnO 2 The hydrogen sensor preparation process, the specific steps are as follows:
[0065] 1) Weigh an appropriate amount of 0.05g of mesoporous SiO with an electronic balance 2 For powder, transfer the material to an agate mortar. According to ink and mesoporous SiO 2 The mass ratio of powder is 10:1. Weigh the printing ink, grind it quickly and forcefully, and grind the printing ink and powder evenly. ;
[0066] 2) The resulting slurry is printed on the SnO prepared in the comparative example by screen printing. 2 Gas sensor surface;
[0067] 3) The sensor is dry. Put the printed sensor into an electric blast drying oven, and dry it at 60°C for 10 minutes;
[0068] 4) Repeat steps (2) and (3) to print a layer of mesoporous SiO 2 SnO 2 The gas sensor is overprinted to 8 layers.
[0069] 5) 8 layers of mesoporous SiO will be printed 2 SnO 2 The gas sensor substrate was placed in the air to ...
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Abstract
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