Preparation method and application of hydrogen sulfide gas sensor based on titanium dioxide nanosheet supported noble metal
A gas sensor, titanium dioxide technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of non-reusable, low sensitivity, etc., and achieve the effect of increasing electron transfer capacity, solving fast response, and convenient operation
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Embodiment 1
[0024] Example 1CeMn-TiO 2 / g -C 3 N 4 preparation of
[0025] First, add 0.8mmol cerium salt and 0.8mmol manganese salt to 5mL tetrabutyl titanate, slowly add 0.5mL hydrofluoric acid during stirring, react in the reactor at 160°C for 24 hours, after cooling to room temperature, After centrifugal washing with ultrapure water and absolute ethanol three times, vacuum-dry at 50°C; secondly, mix 150 mg of the dried solid with 400 mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace, The heating rate is 1°C / min, and calcined at 480°C for 5 hours; finally, the calcined powder is cooled to room temperature to obtain CeMn-TiO 2 / g -C 3 N 4 ;
[0026] Described cerium salt is cerium sulfate;
Embodiment 2
[0028] Example 2CeMn-TiO 2 / g -C 3 N 4 preparation of
[0029] First, add 0.8mmol cerium salt and 1.0mmol manganese salt to 5mL tetrabutyl titanate, slowly add 0.65mL hydrofluoric acid during stirring, react in the reactor at 180°C for 21 hours, after cooling to room temperature, After centrifuging and washing three times with ultrapure water and absolute ethanol, vacuum-dry at 50°C; secondly, mix 200 mg of the dried solid with 400 mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace, The heating rate is 2°C / min, and calcined at 520°C for 2 hours; finally, the calcined powder is cooled to room temperature to obtain CeMn-TiO 2 / g -C 3 N 4 ;
[0030] Described cerium salt is cerium chloride;
[0031] Described manganese salt is manganese chloride.
Embodiment 3
[0032] Example 3CeMn-TiO 2 / g -C 3 N 4 preparation of
[0033] First, add 0.8mmol cerium salt and 1.2mmol manganese salt to 5mL tetrabutyl titanate, slowly add 0.8mL hydrofluoric acid during stirring, react in the reactor at 200°C for 18 hours, cool to room temperature, After centrifuging and washing with ultrapure water and absolute ethanol three times, vacuum-dry at 50°C; secondly, mix 250 mg of the dried solid with 400 mg of melamine, and grind it into a powder; then, put the ground powder into a muffle furnace, The heating rate is 3°C / min, and calcined at 560°C for 0.5 hours; finally, the calcined powder is cooled to room temperature to obtain CeMn-TiO 2 / g -C 3 N 4 ;
[0034] Described cerium salt is cerium nitrate;
[0035] Described manganese salt is manganese nitrate.
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