Preparation method and application of a co@coo/ncnt core-shell adsorbent
An adsorbent, core-shell type technology, applied in the field of preparation of Co@CoO/NCNT core-shell type adsorbent, can solve the problems of single structure, few adsorption applications, etc., achieve high removal rate, short adsorption equilibrium time, and economical raw materials Effect
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Embodiment 1
[0040] The preparation method of a Co@CoO / NCNT core-shell adsorbent in this embodiment, the specific preparation steps are as follows:
[0041] (1) Mix and dissolve 0.6g F-127 and 60mL distilled water, add 0.4g g-C 3 N 4 , stirred for 10 minutes, ultrasonicated the mixed solution for 3 hours, then added 2.5mL 0.17mol / L cobalt nitrate hexahydrate solution, stirred for 12 hours, then transferred to an 80°C oil bath, stirred until dry, and dried in an oven at 180-230°C 40min dry.
[0042] (2) Dry the sample in N 2 Under protection, raise the temperature from normal temperature to 550°C (heating rate 2°C / min), keep it for 2h, then raise the temperature to 800°C (heating rate 2°C / min), keep it for 2h, after cooling down, grind the obtained black fluffy sample for 30min, you can get 2.5 -Co@CoO / NCNT.
[0043]The XRD spectrum of the 2.5-Co@CoO / NCNT obtained in this embodiment is as follows figure 1 As shown, it can be seen from the figure that the sample prepared in this embodim...
Embodiment 2
[0045] The preparation method of a Co@CoO / NCNT core-shell adsorbent in this embodiment, the specific preparation steps are as follows:
[0046] (1) Mix and dissolve 0.6g F-127 and 60mL distilled water, add 0.4g g-C 3 N 4 , stirred for 10 minutes, ultrasonicated the mixed solution for 3 hours, then added 5.0 mL of 0.17 mol / L cobalt nitrate hexahydrate solution, stirred for 12 hours, then transferred to an 80°C oil bath, stirred until dry, and dried in an oven at 180-230°C 40min dry.
[0047] (2) Dry the sample in N 2 Under protection, raise the temperature from normal temperature to 550°C (heating rate 2°C / min), keep it for 2h, then raise the temperature to 800°C (heating rate 2°C / min), keep it for 2h, after cooling down, grind the obtained black fluffy sample for 30min, you can get 5.0 -Co@CoO / NCNT.
[0048] The XRD spectrum of the 5.0-Co@CoO / NCNT obtained in this embodiment is as follows figure 1 As shown, it can be seen from the figure that the sample prepared in this e...
Embodiment 3
[0050] A preparation method of a Co@CoO core-shell material in this embodiment, the specific preparation steps are as follows:
[0051] (1) Mix and dissolve 0.6g F-127 and 60mL distilled water, add 0.4g g-C 3 N 4 , stirred for 10 minutes, ultrasonicated the mixed solution for 3 hours, then added 7.5mL 0.17mol / L cobalt nitrate hexahydrate solution, stirred for 12 hours, then transferred to an 80°C oil bath and stirred until dry, and placed in an oven at 180-230°C to dry 40min dry.
[0052] (2) Dry the sample in N 2 Under protection, raise the temperature from normal temperature to 550°C (heating rate 2°C / min), keep it for 2h, then raise the temperature to 800°C (heating rate 2°C / min), keep it for 2h, after cooling down, grind the obtained black fluffy sample for 30min, you can get 7.5 -Co@CoO / NCNT.
[0053] The XRD spectrum of the 7.5-Co@CoO / NCNT obtained in this embodiment is as follows figure 1 As shown, it can be seen from the figure that the sample prepared in this emb...
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