Preparation method and application of flower-like ni-doped molybdenum disulfide/titania photocatalytic material
A technology of photocatalytic materials, molybdenum disulfide, applied in the field of photocatalytic nanomaterials and the environment, can solve problems such as improving MoS2 in a single way, and achieve the effects of high controllability, high catalytic activity, and high controllability of overall parameters
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Embodiment 1
[0027] A method for preparing a flower-like Ni-doped molybdenum disulfide / titanium dioxide photocatalytic material, characterized in that the flower-like Ni-doped MoS assembled by nanosheets is obtained by using a solvothermal method without surfactants and templates 2 structure, and then coated with ultra-thin TiO on the surface by atomic layer deposition 2 layer, the flower-like Ni-dopedMoS with excellent catalytic performance can be obtained 2 / TiO 2 Photocatalytic material, comprising the steps of:
[0028] Take 1mmol sodium molybdate and 0.01mmol nickel nitrate, dissolve in 50mL ethylene glycol and deionized water (volume ratio 1:1) mixed solution, sonicate until completely dissolved to obtain solution A;
[0029] Take 2.2mmol thioacetamide and add it to solution A, stir it magnetically (at a rate of 400r / min) until it is completely dissolved, then transfer it to a high-pressure reactor with a tetrafluoroethylene liner, react at 200ºC for 12 hours, cool to room temperat...
Embodiment 2
[0034] Take 1mmol potassium molybdate and 0.02mmol nickel nitrate, dissolve in 50mL ethylene glycol and deionized water (volume ratio 3:1) mixed solution, sonicate until completely dissolved to obtain solution A;
[0035] Add 2.5mmol thiourea to solution A, magnetically stir (stirring rate is controlled at 600r / min) until completely dissolved, then transfer to a high-pressure reactor with a tetrafluoroethylene liner, react at 180ºC for 12 hours, cool to room temperature, and take out .
[0036] The product was washed alternately with deionized water and ethanol, and freeze-dried at -60 ºC in a vacuum environment;
[0037]Put the dried powder into the ALD chamber, under the environment of 8hPa at 120ºC, use titanium tetrachloride and water as the precursor source, and use the carrier gas flow rate of 150sccm, according to titanium tetrachloride / high-purity nitrogen cleaning / water / High-purity nitrogen cleaning is 10 cycles of deposition in one cycle, (the pulse time of titani...
Embodiment 3
[0039] Take 1mmol of sodium molybdate and 0.04mmol of nickel sulfate, dissolve in 50mL of ethylene glycol and deionized water (volume ratio 4:1) mixed solution, sonicate until completely dissolved to obtain solution A;
[0040] Take 2.2mmol thiourea and add it to solution A, stir it magnetically (at a rate of 800r / min) until it is completely dissolved, then transfer it to a high-pressure reactor with a tetrafluoroethylene liner, react at 220ºC for 12 hours, cool to room temperature, and take it out.
[0041] The product was washed alternately with deionized water and ethanol, and freeze-dried at -20 ºC in a vacuum environment;
[0042] Put the dried powder into the ALD chamber, under the environment of 10hPa at 150ºC, use titanium tetrachloride and water as the precursor source, and use the carrier gas flow rate of 150sccm to clean according to titanium tetrachloride / high-purity nitrogen / water / High-purity nitrogen cleaning is 50 cycles of deposition in one cycle, (the pulse ...
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