Molybdenum disulfide-based nanomaterials and preparation methods for efficient photocatalytic water splitting for hydrogen production
A nanomaterial, molybdenum disulfide technology, applied in the field of catalysis, can solve the problems of limited research on noble metal nanoparticles/molybdenum disulfide composite materials, independent light absorption and interface engineering, and difficulty in simultaneous improvement, so as to promote the wide application of technology, Facilitates electron transfer and low-cost effects
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Embodiment 1
[0020] Polyvinyl alcohol (7wt%) was dissolved in dimethylformamide and stirred overnight at 60°C, and then 1.5g of ammonium molybdate was added to obtain a uniform electrospinning solution. A syringe with a needle tip diameter of 0.5mm and a volume of 20ml was used, the electric field voltage was set to 16KV, and the flow rate was controlled at 0.7ml / h for electrospinning, and then calcined in air at 280°C for 3h to obtain molybdenum trioxide nanomaterials. Take 2.0mmol sodium molybdate and 4.0mmol cysteine dissolved in deionized water to obtain solution A, take 0.5g of molybdenum oxide nanomaterials dissolved in deionized water to obtain solution B, add solution B drop by drop to solution A and ultrasonically 20min, and then carry out a hydrothermal reaction at 180°C for 12h. After the reaction is finished, it is centrifuged and washed at 4500 rpm, and then dried at 65° C. to obtain a molybdenum disulfide / molybdenum trioxide nanocomposite material.
[0021] Characterizatio...
Embodiment 2
[0023] Polyvinyl alcohol (7wt%) was dissolved in dimethylformamide and stirred overnight at 55°C, and then 2g of ammonium molybdate was added to obtain a homogeneous electrospinning solution. A syringe with a needle tip diameter of 0.5mm and a volume of 20ml was used, the electric field voltage was set to 17KV, and the flow rate was controlled at 0.8ml / h for electrospinning, and then calcined in air at 300°C for 2h to obtain molybdenum trioxide nanomaterials. Take 2.5mmol sodium molybdate and 4.0mmol cysteine dissolved in deionized water to obtain solution A, take 0.6g of molybdenum oxide nanomaterials dissolved in deionized water to obtain solution B, add solution B drop by drop to solution A and sonicate 25min, and then conduct a hydrothermal reaction at 190°C for 9h. After the reaction is finished, it is centrifuged and washed at 5000 rpm, and then dried at 60° C. to obtain a molybdenum disulfide / molybdenum trioxide nanocomposite material.
[0024] Characterization: Take...
Embodiment 3
[0026] Polyvinyl alcohol (7wt%) was dissolved in dimethylformamide and stirred overnight at 65°C, and then 1 g of ammonium molybdate was added to obtain a uniform electrospinning solution. A syringe with a needle tip diameter of 0.5mm and a volume of 20ml was used, the electric field voltage was set to 17KV, and the flow rate was controlled at 0.9ml / h for electrospinning, and then calcined in air at 320°C for 1.5h to obtain molybdenum trioxide nanomaterials. Take 3.0mmol sodium molybdate and 4.5mmol cysteine dissolved in deionized water to obtain solution A, take 0.8g of molybdenum oxide nanomaterials dissolved in deionized water to obtain solution B, add solution B drop by drop to solution A and sonicate 30min, and then carry out a hydrothermal reaction at 200°C for 16h. After the reaction is finished, it is centrifuged and washed at 5500 rpm, and then dried at 70° C. to obtain a molybdenum disulfide / molybdenum trioxide nanocomposite material.
[0027] Characterization: Ta...
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