Preparation method and application of core-shell structural magnetic nano composite catalyst
A composite catalyst, magnetic nanotechnology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of inefficient removal of new organic pollutants, etc. To achieve the effect of reuse, high-efficiency magnetic separation capability, and promotion of electron transfer
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Embodiment 1
[0034] Embodiment one, a kind of preparation method of core-shell structure magnetic nanocomposite catalyst, it comprises the steps:
[0035] S1, will contain Fe 2+ Metal salt X and containing Co 2+ The metal salt Y was dissolved in deionized water, the molar ratio of the metal salt X and the metal salt Y was 1:0.75, and stirred for 10 minutes to obtain the mixed solution A;
[0036] S2, by removing the dissolved oxygen in the mixed solution A, to obtain the mixed solution B;
[0037] S3, using the automatic dropwise method of peristaltic pump, adding NaOH solution with a concentration of 0.5mol / L to the mixed solution B dropwise and stirring at a temperature of 25°C, adjusting the pH value of the mixed solution B to 9, Continue to stir to obtain a dark green reaction precursor solution to obtain a mixed solution C;
[0038] S4, transfer the mixed solution C into a water bath, heat under reflux at a temperature of 30° C. and stir for 14 hours, then let it stand for 2 hours,...
Embodiment 2
[0040] Embodiment 2, a method for preparing a magnetic nanocomposite catalyst with a core-shell structure, which comprises the following steps:
[0041] S1, will contain Fe 2+ Metal salt X and containing Co 2+ The metal salt Y was dissolved in deionized water, the molar ratio of the metal salt X and the metal salt Y was 1:0.5, and stirred for 15 minutes to obtain the mixed solution A;
[0042] S2, removing the dissolved oxygen in the mixed solution A through ultrasonic vibration to obtain the mixed solution B;
[0043] S3, using a burette to manually drop, add the NaOH solution with a concentration of 2mol / L to the mixed solution B drop by drop and stir at a temperature of 15°C, adjust the pH value of the mixed solution B to 12, and continue to stir A dark green reaction precursor solution was obtained, and a mixed solution C was obtained;
[0044] S4, transfer the mixed solution C into a water bath, heat and stir under reflux at a temperature of 20°C for 10 h, then let it ...
Embodiment 3
[0046] Embodiment three, a kind of preparation method of core-shell structure magnetic nanocomposite catalyst, it comprises the following steps:
[0047] S1, will contain Fe 2+ Metal salt X and containing Co 2+ The metal salt Y is dissolved in deionized water, the molar ratio of the metal salt X and the metal salt Y is 1:1, and stirred for 20 minutes to obtain the mixed solution A;
[0048] S2, removing the dissolved oxygen in the mixed solution A through ultrasonic vibration to obtain the mixed solution B;
[0049] S3, using the automatic dropwise addition method of the peristaltic pump, adding the NaOH solution with a concentration of 0.1mol / L to the mixed solution B dropwise and stirring at a temperature of 30°C, adjusting the pH value of the mixed solution B to 10, Continue to stir to obtain a dark green reaction precursor solution to obtain a mixed solution C;
[0050] S4, transfer the mixed solution C into a water bath, heat and stir under reflux at a temperature of 4...
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