Manufacture method of tilted fiber grating hydrogen sensor based on optical catalytic oxidation
A technology of inclined fiber grating and photocatalytic oxidation, which is applied in the measurement of phase influence characteristics, etc., to solve the poisoning of hydrogen-sensitive catalysts, improve the sensitivity, and make it easy to manufacture.
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[0012] Example 1. Firstly, a sol-gel tungstic acid was prepared with a protonated cation exchange resin with sodium tungstate. The prepared tungstic acid was washed with deionized water and centrifuged 3 times; heated to 50°C and left to stand for 5 times Then, add platinum chloric acid, stir and heat to 400°C, and let stand for 1 hour to obtain platinum-doped tungsten oxide powder with platinum adsorbed on the surface, wherein the molar ratio of platinum to tungsten is 1:14; Finally, platinum-doped tungsten oxide powder is added to ethanolamine solvent, and then dipped and coated to make it evenly deposited on the surface of the inclined fiber grating to form a hydrogen-sensitive film.
Example Embodiment
[0013] Example 2. Firstly, a sol-gel tungstic acid was prepared with a protonated cation exchange resin with sodium tungstate. The prepared tungstic acid was washed with deionized water and centrifuged 5 times; heated to 55°C and left to stand for 6 Then, add platinum chloric acid, stir and heat to 450°C, and let stand for 1.5 hours to obtain platinum-doped tungsten oxide powder whose surface is adsorbed by platinum, wherein the molar ratio of platinum to tungsten is 1:14; Finally, the platinum-doped tungsten oxide powder is added to the ethanolamine solvent, and then the dipping coating method is used to make it uniformly deposited on the surface of the inclined fiber grating to form a hydrogen-sensitive film.
Example Embodiment
[0014] Example 3. Firstly, a sol-gel tungstic acid was prepared with a protonated cation exchange resin with sodium tungstate. The prepared tungstic acid was washed with deionized water and centrifuged 8 times; heated to 60°C and left to stand for 7 Then, add platinum chloric acid, stir and heat to 500°C, and let stand for 2 hours to obtain platinum-doped tungsten oxide powder whose surface is adsorbed by platinum, wherein the molar ratio of platinum to tungsten is 1:14; Finally, platinum-doped tungsten oxide powder is added to ethanolamine solvent, and then dipped and coated to make it evenly deposited on the surface of the inclined fiber grating to form a hydrogen-sensitive film.
[0015] A sol-gel method was used to prepare platinum-doped tungsten oxide film on the surface of the inclined grating. When hydrogen is present, the tungsten oxide film will produce the following chemical reactions:
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[0017]
[0018] Tungsten trioxide releases a lot of heat when it is reduced...
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