N/CoTiO3@g-C3N4 composite material with alcohol-sensitive and aldehyde-sensitive dual functions as well as preparation method and application of N/CoTiO3@g-C3N4 composite material
An alcohol-sensitive aldehyde-sensitive composite material technology is applied in the field of N/CoTiO3@g-C3N4 composite material and its preparation, which can solve the problems of narrow operating temperature range, alcohol sensitivity, and long response recovery time.
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Embodiment 1
[0039] A kind of N / CoTiO with dual functions of alcohol-sensing and aldehyde-sensing 3 @g-C 3 N 4 A method for preparing a composite material, comprising the steps of:
[0040] Step 1) Fully dissolve analytically pure cobalt nitrate hexahydrate in ultrapure water, so that the concentration of cobalt ions in the solution reaches 0.1mol L -1 , using analytically pure hydrochloric acid to adjust the pH value of the solution to 2.0, and magnetic stirring at room temperature to obtain a purple-red transparent solution;
[0041] Step 2) Analytical pure isobutyl titanate is dissolved in absolute ethanol, so that the concentration of titanium ions in the solution reaches 0.1mol L -1 , stirred thoroughly to obtain a transparent solution. Then add the transparent solution dropwise into the above-mentioned purple-red transparent solution, control the reaction temperature at 25°C, the final volume ratio of the two solutions is 1:1, and stir magnetically for 12 hours to obtain a jelly-...
Embodiment 2
[0045] A kind of N / CoTiO with dual functions of alcohol-sensing and aldehyde-sensing 3 @g-C 3 N 4 A method for preparing a composite material, comprising the steps of:
[0046] Step 1) Fully dissolve analytically pure cobalt nitrate hexahydrate in ultrapure water, so that the cobalt ion concentration in the solution reaches 0.2mol L -1 , using analytically pure hydrochloric acid to adjust the pH value of the solution to 3.0, and magnetic stirring at room temperature to obtain a purple-red transparent solution;
[0047] Step 2) Analytical pure tetraisopropyl titanate is dissolved in absolute ethanol, so that the concentration of titanium ions in the solution reaches 0.2mol L -1 , stirred thoroughly to obtain a transparent solution. Then add the transparent solution dropwise into the above-mentioned purple-red transparent solution, control the reaction temperature to 40°C, and the final volume ratio of the two solutions to 1:2, and magnetically stir for 18 hours to obtain a ...
Embodiment 3
[0051] A kind of N / CoTiO with dual functions of alcohol-sensing and aldehyde-sensing 3 @g-C 3 N 4 A method for preparing a composite material, comprising the steps of:
[0052] Step 1) Fully dissolve analytically pure cobalt chloride in ultrapure water, so that the concentration of cobalt ions in the solution reaches 0.3mol L -1 , using analytically pure hydrochloric acid to adjust the pH value of the solution to 4.0, and magnetic stirring at room temperature to obtain a purple-red transparent solution;
[0053] Step 2) Analytical pure isobutyl titanate is dissolved in absolute ethanol so that the concentration of titanium ions in the solution reaches 0.3mol L -1 , stirred thoroughly to obtain a transparent solution. Then add the transparent solution dropwise into the above-mentioned purple-red transparent solution, control the reaction temperature at 55°C, the final volume ratio of the two solutions is 1:3, and stir magnetically for 24 hours to obtain a jelly-like gel;
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