Preparation method and application of core-shell P-CoFe2O4(at)GCN photocatalyst
A p-cofe2o4, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc. Harm, low photocatalytic efficiency and other problems, to achieve the effect of improving photocatalytic performance, modifying photocatalytic activity, and simple preparation process
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[0027] Example 1
[0028] A core-shell type P-CoFe 2 O 4 The preparation method of @GCN photocatalyst includes the following steps:
[0029] a) Cobalt nitrate and ferric nitrate are mixed thoroughly in equal volume at a molar concentration ratio of 1:1 for 0.5h, the reaction temperature is 35℃, and the stirring rate is 500r•min -1 ;
[0030] b) Slowly add 2mol / L potassium hydroxide solution to the fully mixed solution to complete precipitation, and react at 80°C for 3h, then rinse with absolute ethanol and distilled water several times, and dry at 60°C for 16h. Can produce strong magnetic nanoparticles CoFe 2 O 4 ;
[0031] c) Weigh the prepared CoFe 2 O 4 Add to 80 ml of distilled water, add thiourea and melamine polyphosphate to the mixed solution, stir thoroughly for 5h, and stir at 500r•min -1 , CoFe 2 O 4 , The mass ratio of thiourea and melamine polyphosphate is 0.05:1:0.2;
[0032] d) After solid-liquid separation, the mixed solution is dried at 80°C for 12 hours and then ground...
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[0036] Example 2
[0037] A core-shell type P-CoFe 2 O 4 The preparation method of @GCN photocatalyst includes the following steps:
[0038] a) Cobalt sulfate and ferric chloride are mixed thoroughly for 0.5h in equal volume at a molar concentration ratio of 1:2, the reaction temperature is 45℃, and the stirring rate is 600r•min -1 ;
[0039] b) Slowly add dropwise 2mol / L ammonia solution to the fully mixed solution to complete precipitation, and react at 90°C for 4h, then rinse with absolute ethanol and distilled water several times, and dry at 70°C for 18h. Preparation of strong magnetic nanoparticles CoFe 2 O 4 ;
[0040] c) Weigh the prepared CoFe 2 O 4 Add to 80 ml of distilled water, add urea and phytic acid to the mixed solution, fully stir for 80h, the stirring rate is 700r•min -1 , CoFe 2 O 4 The mass ratio of urea and phytic acid is 0.08:1:0.5;
[0041] d) After solid-liquid separation, the mixed solution was dried at 90°C for 16 hours and then ground into powder;
[0042] e) ...
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[0044] Example 3
[0045] A core-shell type P-CoFe 2 O 4 The preparation method of @GCN photocatalyst includes the following steps:
[0046] a) The cobalt chloride and ferric chloride are mixed thoroughly for 1.0h in equal volume at a molar concentration ratio of 1:2, the reaction temperature is 55℃, and the stirring rate is 800r•min -1 ;
[0047] b) Slowly add 2mol / L sodium hydroxide solution dropwise to the fully mixed solution to complete precipitation, and react at 90°C for 5h, then rinse with absolute ethanol and distilled water for several times, and dry at 80°C for 24h, Can produce strong magnetic nanoparticles CoFe 2 O 4 ;
[0048] c) Weigh the prepared CoFe 2 O 4 Add to 80 ml of distilled water, add melamine and melamine polyphosphate to the mixed solution, stir well for 10h, and the stirring rate is 1000r•min -1 , CoFe 2 O 4 , The mass ratio of melamine and melamine polyphosphate is 0.1:1:1;
[0049] d) After solid-liquid separation, the mixed solution of step c) is dried at ...
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