A preparation method and application of a hydrogen sulfide gas sensor based on titanium dioxide nanosheets loaded with noble metals
A gas sensor, titanium dioxide technology, applied in instruments, scientific instruments, measuring devices, etc., can solve problems such as low sensitivity and inability to reuse, achieve rapid response, increase electron transfer capacity, and solve specific detection of hydrogen sulfide effect of gas
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Embodiment 1
[0024] Example 1 CeMn-TiO 2 / g -C 3 N 4 preparation of
[0025] First, add 0.8 mmol of cerium salt and 0.8 mmol of manganese salt into 5 mL of tetrabutyl titanate, slowly add 0.5 mL of hydrofluoric acid during stirring, react in the reactor at 160 °C for 24 hours, and cool to room temperature , washed with ultrapure water and absolute ethanol for three times, then vacuum-dried at 50°C; secondly, 150 mg of the dried solid was mixed with 400 mg of melamine, and ground into a powder; then, the ground powder was put into a muffle In the furnace, the heating rate is 1 ℃ / min, and it is calcined at 480 ℃ for 5 hours; finally, the calcined powder is cooled to room temperature, and the CeMn-TiO 2 / g -C 3 N 4 ;
[0026] Described cerium salt is cerium sulfate;
[0027] Described manganese salt is manganese sulfate.
Embodiment 2
[0028] Example 2 CeMn-TiO 2 / g -C 3 N 4 preparation of
[0029] First, add 0.8 mmol cerium salt and 1.0 mmol manganese salt to 5 mL tetrabutyl titanate, slowly add 0.65 mL hydrofluoric acid during stirring, react in the reactor at 180 °C for 21 hours, and cool to room temperature , washed three times with ultra-pure water and absolute ethanol, and vacuum-dried at 50°C; secondly, take 200 mg of the dried solid and mix it with 400 mg of melamine, and grind it into a powder; then, put the ground powder into a muffle In the furnace, the heating rate is 2 ℃ / min, and calcined at 520 ℃ for 2 hours; finally, the calcined powder is cooled to room temperature, and the 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 3 CeMn-TiO 2 / g -C 3 N 4 preparation of
[0033] First, add 0.8 mmol of cerium salt and 1.2 mmol of manganese salt into 5 mL of tetrabutyl titanate, slowly add 0.8 mL of hydrofluoric acid during stirring, react in the reactor at 200 °C for 18 hours, and cool to room temperature , washed with ultrapure water and absolute ethanol for three times, then vacuum-dried at 50°C; secondly, 250 mg of the dried solid was mixed with 400 mg of melamine, and ground into a powder; then, the ground powder was put into a muffle In the furnace, the heating rate is 3 ℃ / min, and calcined at 560 ℃ for 0.5 hours; finally, the calcined powder is cooled to room temperature, and the 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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