Preparation method of porous cobalt selenide photocatalyst
A technology of cobalt selenide catalyst and cobalt selenide light, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of responsible loading process and high carrier price, and achieve good pore structure, Large specific surface area, favorable for adsorption and catalysis
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Embodiment 1
[0015] CoCl 2 and AlCl 3 Dissolve them in water respectively and make a solution with a concentration of 1 mol / L. Mix the two solutions, keep the molar ratio of Co and Al at 2, and drop a certain amount of NaOH in a water bath with a constant temperature of 70°C to keep the pH value at 12. , reacted for 2 h, and aged for 12 h. During this process, a precipitate with a layered structure was formed. The precipitate was separated and washed twice with deionized water; the solid obtained from the precipitate was added to a sodium selenite solution with a concentration of 1 mol / L , with a solid-to-liquid ratio of 1:50, stirred for 4 hours, and separated by precipitation. After washing twice with deionized water, the obtained solid was calcined at a temperature of 400°C; 1 g of the calcined product was added to 20 mL of % of hydrazine hydrate solution to obtain porous cobalt selenide catalyst.
[0016] Using an L-shaped tube (inner diameter of 10 mm) continuous flow reaction evalu...
Embodiment 2
[0018] CoCl 2 and AlCl 3 Dissolve them in water respectively and make a solution with a concentration of 2 mol / L. Mix the two solutions, keep the molar ratio of Co and Al at 4, and drop a certain amount of NaOH in a water bath with a constant temperature of 80°C to keep the pH value at 13. , reacted for 3 h, and aged for 24 h. During this process, a precipitate with a layered structure was formed. The precipitate was separated and washed 3 times with deionized water; the precipitated solid was added to a sodium selenite solution with a concentration of 2 mol / L , the solid-liquid ratio was 1:20, stirred for 5 h, precipitated and separated, and the obtained solid was washed three times with deionized water, then calcined at a temperature of 500°C; 1 g of the calcined product was added to 40 mL of In 20% hydrazine hydrate solution, a porous cobalt selenide catalyst was obtained.
[0019] Add 0.5 g of the obtained catalyst to 500 mL of Orange II wastewater with a concentration o...
Embodiment 3
[0021] CoCl 2 and AlCl 3 Dissolve them in water respectively, and make a solution with a concentration of 2 mol / L. Mix the two solutions, keep the molar ratio of Co and Al at 3, drop a certain amount of NaOH in a water bath with a constant temperature of 75°C, and keep the pH at 13 , reacted for 3 h, and aged for 18 h. During this process, a precipitate with a layered structure was formed. The precipitate was separated and washed 3 times with deionized water; the precipitated solid was added to a sodium selenite solution with a concentration of 1.5 mol / L , the solid-to-liquid ratio was 1:30, stirred for 4 h, precipitated and separated, and the obtained solid was washed three times with deionized water, then calcined at a temperature of 450°C; 1 g of the calcined product was added to 30 mL of In a 30% hydrazine hydrate solution, a porous cobalt selenide catalyst was obtained.
[0022] Add 0.5 g of the obtained catalyst to 500 mL of methylene blue wastewater with a concentrati...
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