Preparation method of porous nickel oxide/tin dioxide micro/nano spheres
A technology of tin dioxide and micro-nano spheres, applied in the direction of material resistance, etc., can solve the problems of low response sensitivity, the inability to realize the regulation of the morphology and microstructure of tin dioxide nanocrystals, and the restriction of gas-sensing characteristics, etc., to achieve The effect of high sensitive response, non-variability, and simple process
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Examples
Embodiment 1
[0040] Dissolve the sodium stannate raw material in water, adjust the pH value of the solution to 12.60 with 5.0M sodium hydroxide, and prepare 30 ml of 0.5M sodium stannate solution, then add 3 ml of concentrated ammonia water (mass percentage concentration is 25.0-28.0% ), under magnetic stirring at a speed of 60 rpm, add 15 ml of 1.0M nickel sulfate solution to obtain a mixed solution;
[0041] Standing and aging for 6 hours at a temperature of 80°C, a light green precipitate was obtained; the light green precipitate was filtered, washed, and dried to obtain a micronano-spherical nickel hydroxystannate precursor. The product characterization results are shown in the appendix figure 1 And attached figure 2 shown;
[0042] The micro-nano spherical nickel hydroxystannate precursor was calcined at 700°C for 2h, and after natural cooling, a light yellow porous micro-nano spherical NiO / SnO 2 Mixture powder, product characterization results are attached image 3 And attached ...
Embodiment 2
[0044] Dissolve the tin tetrachloride pentahydrate raw material in water, adjust the pH value of the solution to 13.50 with 5.0M sodium hydroxide, prepare 30 milliliters of 0.5M sodium stannate solution, then add 4 milliliters of concentrated ammonia (mass percentage concentration is 25.0 -28.0%), under magnetic stirring at a speed of 50 rpm, add 15 ml of 1.0M nickel sulfate solution to obtain a mixed solution;
[0045] Standing and aging for 6 hours at a temperature of 60°C, a light green precipitate was obtained; the light green precipitate was filtered, washed, and dried to obtain a micronano-spherical nickel hydroxystannate precursor;
[0046] The micro-nano spherical nickel hydroxystannate precursor was calcined at 720°C for 2h, and after natural cooling, a light yellow porous micro-nano spherical NiO / SnO 2 Hybrid powder.
Embodiment 3
[0048] Dissolve the tin tetrachloride pentahydrate raw material in water, adjust the pH value of the solution to 11.80 with 5.0M sodium hydroxide, prepare 30 milliliters of 0.5M sodium stannate solution, then add 6 milliliters of concentrated ammonia water (mass percentage concentration is 25.0 -28.0%), under magnetic stirring with a rotating speed of 80 rpm, add 15 ml of 1.0M nickel sulfate solution to obtain a mixed solution;
[0049] Standing and aging at 60° C. for 8 hours, a light green precipitate was obtained. The light green precipitate is filtered, washed, and dried to obtain a micro-nano spherical nickel hydroxystannate precursor;
[0050] The micro-nano spherical nickel hydroxystannate precursor was calcined at 800°C for 2h, and after natural cooling, a light yellow porous micro-nano spherical NiO / SnO 2 Hybrid powder.
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Abstract
Description
Claims
Application Information
- IPC
- G01N27/12
- Inventors
- 黄家锐; 王影影