Visible light catalytic composite material and preparation method and application thereof
A composite material and visible light technology, applied in the field of photocatalytic materials, can solve the problems of easy recombination of photogenerated electrons and holes, easy photocorrosion of photocatalysts, etc.
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Embodiment 1
[0093] A method for preparing a visible light catalytic composite material, comprising the following steps:
[0094] (1) Preparation of SrCoO by sol-gel method 3 : Weigh 0.01mol Co(NO 3 ) 3 ·6H 2 O and 0.01mol Sr(NO 3 ) 2 Dissolve in 40mL deionized water, and ultrasonicate for 30min in a 300W power ultrasonic oscillator to fully dissolve and mix to obtain mixed solution A; then according to (Co(NO 3 ) 3 ·6H 2 O and Sr(NO 3 ) 2 Middle Co 3+ and Sr 2+ total molar amount): citric acid: organic additive molar ratio 1:1:1.5, weighed 0.01mol citric acid and 0.015mol edetate disodium, and added them to the mixed solution A under the condition of 300W ultrasonic oscillation , and continue to sonicate for 60 minutes to obtain the mixed solution B; then adjust the pH value of the mixed solution B to 4.5 with ammonia water, and then place it in an 80°C water bath and continue stirring until the mixture B in the state of purple sol; place the mixture B in the state of purple so...
Embodiment 2
[0100] A method for preparing a visible light catalytic composite material, comprising the following steps:
[0101] (1)SrCoO 3 The preparation is the same as in Example 1.
[0102] (2) Accurately weigh 0.2g of the SrCoO prepared in step (1) 3 Disperse in 40mL ultrapure water, ultrasonicate for 30min under the condition of ultrasonic oscillation with 300W power, add 10mL to dissolve 0.16mol AgNO 3 Aqueous solution, continue to stir for 60min, finally dropwise add 20mL dissolved with 0.17mol Na 2 HPO 4 12H 2 After stirring the aqueous solution of O for 1 h, the solid precipitate obtained by the reaction was recovered by centrifugation at a speed of 6000 r / min, and the solid precipitate was repeatedly ultrasonically washed with absolute ethanol and ultrapure water, and then vacuum-dried at 60 °C Dry in the oven for 12 hours, grind and pass through an 80-mesh sieve to obtain SrCoO with a mass ratio of 1.5:1 3 and Ag 3 PO 4 of composite materials.
Embodiment 3
[0106] A method for preparing a visible light catalytic composite material, comprising the following steps:
[0107] (1) Preparation of SrCoO by sol-gel method 3 : Accurately weigh 0.01mol Co(NO 3 ) 3 ·6H 2 O and 0.01mol Sr(NO 3 ) 2 Dissolve in 40mL deionized water, ultrasonicate for 30min in a 300W power ultrasonic oscillator to make it fully dissolve and mix; then according to (Co(NO 3 ) 3 ·6H 2 O and Sr(NO 3 ) 2 Middle Co 3+ and Sr 2+ total molar amount): citric acid: organic additive molar ratio 1:1:1.5, accurately weighed 0.01mol citric acid and 0.015mol disodium edetate, and added them to the above solution under ultrasonic vibration conditions of 300W power , continue to ultrasonic 60min. Then the pH value of the solution was adjusted to 4.5 with ammonia water, and then kept stirring in a water bath at 80°C until it was in the state of a purple sol, and then dried in an oven at 120°C for 16 hours. The dried samples were transferred to a temperature-programm...
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