Photocatalyst of high active nano magnetic compound and its preparation process
A photocatalyst and nano-magnetic technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of uncontrolled heating rate of heat treatment, low photocatalytic activity, sintering collapse, etc., to achieve The effect of reducing sintering collapse, improving separation rate and reasonable structure
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Embodiment 1
[0025] The reagents used in the experiment are all A.R grades, and all solutions are filtered through a 0.22 μm microporous membrane to remove harmful particulate impurities in the solution. The prepared 0.25mol / L FeCl 2 Solution 80mL and 0.25mol / L FeCl 3 Add 120mL of the solution and 80mL of polyethylene glycol solution (containing 5g of polyethylene glycol 4000) into a 500mL four-neck flask with mechanical stirring, heat in a constant temperature water bath at 70°C, and simultaneously pass high-purity nitrogen for protection. Slowly add 1mol / L NaOH solution dropwise, measure the pH value every 2 minutes, when the pH value reaches 6-7, there will be black Fe 3 o 4 Particles appear, continue to add alkali, adjust the pH value to 11-12. The temperature was raised to 80°C and aged for 2h. Fe will be prepared 3 o 4 Nanoparticles were washed with deionized water until neutral, then washed with absolute ethanol, after magnetic precipitation, diluted with 250 mL of absolute et...
Embodiment 2
[0030] The prepared 0.5mol / L FeCl 2 Solution 40mL and 0.5mol / L FeCl 3 Add 80mL of solution and 80mL of polyethylene glycol solution (containing 4.5g of polyethylene glycol 4000) into a 500mL four-neck flask equipped with mechanical stirring, heat in a constant temperature water bath at 60°C, and simultaneously pass high-purity nitrogen gas for protection. Slowly add 2mol / L NaOH solution dropwise, measure the pH value every 2 minutes, when the pH value reaches 6-7, there will be black Fe 3 o 4 Particles appear, continue to add alkali, adjust the pH value to 11-12. The temperature was raised to 90°C and aged for 2h. Fe will be prepared 3 o 4 Nanoparticles were washed with deionized water until neutral, then washed with absolute ethanol, after magnetic precipitation, diluted with 250 mL of absolute ethanol, and ultrasonicated for 5 cycles to make alcohol-based Fe 3 o 4 Ferrofluid, named F2.
[0031]Weigh 11.2815g SnCl 2 2H 2 O, dissolved in 125mL of absolute ethanol, fi...
Embodiment 3
[0034] Embodiment 3, the prepared 0.4mol / L FeCl 2 Solution 50mL and 0.4mol / L FeCl 3 Add 75mL of solution and 80mL of polyethylene glycol solution (containing 2.5g of polyethylene glycol 4000) into a 500mL four-neck flask equipped with mechanical stirring, heat in a constant temperature water bath at 80°C, and simultaneously pass high-purity nitrogen gas for protection. Slowly add 1.5mol / L NaOH solution dropwise, measure the pH value every 2 minutes, when the pH value reaches 6-7, black Fe 3 o 4 Particles appear, continue to add alkali, adjust the pH value to 11-12. The temperature was raised to 85°C and aged for 2h. Fe will be prepared 3 o 4 Nanoparticles were washed with deionized water until neutral, then washed with absolute ethanol, after magnetic precipitation, diluted with 250 mL of absolute ethanol, and ultrasonicated for 5 cycles to make alcohol-based Fe 3 o 4 Ferrofluid, named F3.
[0035] Weigh 11.2815g SnCl 2 2H 2 O, dissolved in 250mL of absolute ethanol,...
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