A preparation method of composite hollow microspheres for improving the detection performance of triethylamine
A technology of hollow microspheres and triethylamine, which is applied in the preparation of microspheres, microcapsule preparations, measuring devices, etc., to achieve the effects of wide-concentration linear response, increased diffusion and transmission, and enhanced gas-sensing response
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[0027] In this example, 0.2g W 18 o 49 Hollow microsphere powder samples were dispersed in 20mL Co(NO 3 ) 2 In the ethanol solution, after stirring, put it in an oven to volatilize the ethanol to obtain a powder sample, and roast and dry it for 2 hours in an air atmosphere at 300°C to obtain W 18 o 49 / Co 3 o 4 Composite hollow microspheres.
[0028] In this example, W 18 o 49 / Co 3 o 4 Composite hollow microspheres were characterized by TEM, the results are as follows Figure 5 As shown, the sample has a hollow structure, and the spherical shell has a typical layered structure. The diameter of the microsphere is 400-600 microns, but the tube wall is relatively thick; it is characterized by HRTEM, and the results are as follows Image 6 As shown, the spherical shell has a highly crystalline structure, and the lattice fringes correspond to W 18 o 49 The (010) and Co 3 o 4 The (220) crystal plane; its gas sensitivity test, the results are as follows Figure 7 As sh...
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