Composite nano-material for photocatalytic decomposition of water to produce hydrogen and preparation method thereof
A composite nanomaterial and photocatalytic technology, which is applied in the field of photocatalytic water decomposition hydrogen production materials and its preparation, can solve the problems of poor hydrogen production effect of P25 photocatalyst, achieve good application prospects, strong photoresponse, and good stability Effect
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Embodiment 1
[0032] (1) Add nickel nitrate hexahydrate (0.32g) and ferric nitrate nonahydrate (0.44g) in a molar ratio of 1:1 into ultrapure water (20ml) and stir to obtain a uniform dispersion, then disperse well The mixed solution was transferred to a single-neck flask, N-methylpyrrolidone (30ml) was added to the dispersion, heated at 90°C for 4h, naturally cooled to room temperature, washed and freeze-dried to obtain FeNi-LDH nanosheets.
[0033](2) Place the above-mentioned FeNi-LDH (20mg) in absolute ethanol (20ml) to obtain a uniformly dispersed solution after crushing the cells, then weigh it with P25 nanoparticles according to the mass ratio of 5%, and place in absolute ethanol solution Stir mechanically at room temperature for 12 hours. Since the surface of FeNi-LDH is positively charged and P25 nanoparticles are negatively charged, the two can be electrostatically assembled together by mechanical stirring, and then placed in a blast drying oven at 60°C for drying. The time is 8h,...
Embodiment 2
[0035] (1) Add nickel nitrate hexahydrate (0.63g) and ferric nitrate nonahydrate (0.44g) into ultrapure water (20ml) in a ratio of 2:1 and stir to obtain a uniform dispersion, and then mix the dispersed mixed solution Transfer to a single-necked flask, add N-methylpyrrolidone (30ml) to the dispersion, heat at 100°C for 5h, cool to room temperature naturally, wash and freeze-dry to obtain FeNi-LDH nanosheets.
[0036] (2) Place the above-mentioned FeNi-LDH (20mg) in dehydrated ethanol (20ml) to obtain a uniformly dispersed solution after crushing the cells, then weigh it with P25 nanoparticles according to the mass ratio of 10%, and place in dehydrated ethanol solution Stir mechanically at room temperature for 12 hours. Since the surface of FeNi-LDH is positively charged and P25 nanoparticles are negatively charged, the two can be electrostatically assembled together by mechanical stirring, and then placed in a blast drying oven at 60°C for drying. The time is 8h, and the FeNi-...
Embodiment 3
[0038] (1) Add nickel nitrate hexahydrate (0.98g) and ferric nitrate nonahydrate (0.44g) into ultrapure water (20ml) in a molar ratio of 3:1 and stir to obtain a uniform dispersion, and then disperse A good mixed solution was transferred to a single-necked flask, and N-methylpyrrolidone (30ml) was added to the dispersion liquid, heated at 110°C for 6h, naturally cooled to room temperature, washed, and freeze-dried to obtain FeNi- LDH.
[0039] (2) Place the above-mentioned FeNi-LDH (20mg) in absolute ethanol (20ml) to obtain a uniformly dispersed solution after crushing the cells, then weigh it with P25 nanoparticles according to the mass ratio of 15%, and place in absolute ethanol solution Stir mechanically at room temperature for 12 hours. Since the surface of FeNi-LDH is positively charged and P25 nanoparticles are negatively charged, the two can be electrostatically assembled together by mechanical stirring, and then placed in a blast drying oven at 60°C for drying. The t...
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