Method for preparing various structural nanomaterials using iron-rich low-grade clay minerals
A technology of clay minerals and nanomaterials, which is applied in the direction of nanotechnology, magnetic materials, and nanotechnology for materials and surface science. It can solve the problems of waste of resources, many associated minerals, and restricted applications, and achieve stable quality and excellent performance. Effect
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Embodiment 1
[0028] The red low-grade attapulgite clay minerals (SiO 2 Content 65%, Fe 2 O 3 6%) crushed and passed through a 200-mesh sieve. Take 1 kg and disperse it into 8kg of 3.5 mol / L mixed acid (ascorbic acid: hydrochloric acid=1:3 mol ratio) aqueous solution, after microwave hydrothermal treatment at 120 ° C for 30 minutes, centrifuge, collect the supernatant to obtain solution B; the solid is dried , pulverized to obtain white powder A;
[0029] Weigh 200g of white powder A, disperse it into 3000g of aqueous solution containing 90g of magnesium ions, add 40g of ammonium chloride, then add ammonia water to adjust the pH value to 10, mix evenly, put it into a hydrothermal reactor, seal it, and put it in a hydrothermal reactor at a temperature of 160°C. The reaction was carried out for 12h, cooled to room temperature, centrifuged, washed, and dried in vacuum to obtain a layered magnesium silicate nanomaterial;
[0030] Add sodium hydroxide solution to solution B to adjust the pH ...
Embodiment 2
[0032] The iron-rich low-grade bentonite (SiO 2 Content 50%, Fe 2 O 39.8%) crushed into powder and passed through a 200-mesh sieve. Weigh 1 kg and disperse it into 8 kg of 3.5 mol / L mixed acid (ascorbic acid: hydrochloric acid = 1:3 molar ratio) aqueous solution, and after microwave hydrothermal treatment at 120 ° C for 30 minutes, centrifuge, and collect the centrifugal supernatant to obtain solution B. The solid is dried and pulverized to obtain a white powder A;
[0033] Weigh 200g of white powder A, disperse it into 3000g of aqueous solution containing 240g of zinc ions, add 200g of ammonium sulfate, then add ammonia water to adjust the pH to 12, mix evenly, put it into a hydrothermal reactor, seal it, and react at 120°C 12h, cooled to room temperature, centrifuged, washed, and vacuum-dried to obtain zinc silicate nanomaterials with nanoflower-like morphology;
[0034] Add sodium hydroxide solution to solution B, adjust the pH value of the solution to 10, then react at...
Embodiment 3
[0036] The iron-rich sepiolite (SiO 2 Content 56%, Fe 2 O 3 7.8%) crushed into powder and passed through a 200-mesh sieve. Weigh 1 kg, disperse into 8 kg of 3.5 mol / L mixed acid (ascorbic acid: hydrochloric acid = 1:3 molar ratio) aqueous solution, after microwave hydrothermal treatment at 120 ° C for 30 minutes, centrifuge, collect the centrifugal supernatant to obtain a solution B; The solid is dried and pulverized to obtain a white powder A;
[0037] Weigh 200g of white powder A, disperse it into 3000g of aqueous solution containing 200g of nickel ions, add 100g of ammonium nitrate, then add ammonia water to adjust the pH value to 11, mix well, put it into a microwave hydrothermal reactor, seal it, and put it in a microwave hydrothermal reactor at a temperature of 140°C. The reaction was carried out for 12h, cooled to room temperature, centrifuged, washed, and dried in vacuum to obtain nanomaterials with nanocluster morphology;
[0038] Add sodium hydroxide solution to ...
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