SiO2@MgSi0.84O2.68 core-shell structure adsorbent, as well as preparation method and application thereof
A core-shell structure and adsorbent technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve problems such as dye pollution, and achieve low cost, easy regeneration, and strong adsorption capacity.
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Embodiment 1
[0020] Mix 40g of silica sol and 8g of active magnesium oxide evenly, add a small amount of water and stir until it becomes a paste, then add 2g of spherical SiO 2 Continue to stir with a small amount of water, then stir in a rotary mixer at a speed of 1800rpm for 20min, dry at 120°C, and finally calcinate the dried powder in a muffle furnace at 500°C for 3h to obtain a white solid powder with a core-shell structure adsorption agent. The total mass of water added twice is 10 g.
Embodiment 2
[0022] Mix 40g of silica sol and 8g of active magnesium oxide evenly, add a small amount of water and stir until it becomes a paste, then add 3g of spherical SiO 2 Continue to stir with a small amount of water, then stir in a rotary mixer at a speed of 1800rpm for 20min, dry at 120°C, and finally calcinate the dried powder in a muffle furnace at 540°C for 3h to obtain a white solid powder with a core-shell structure adsorption agent. The total mass of water added twice is 15g.
Embodiment 3
[0024] Mix 40g of silica sol and 8g of active magnesium oxide evenly, add a small amount of water and stir until it becomes a paste, then add 2g of spherical SiO 2 Continue to stir with a small amount of water, then stir in a rotary mixer at a speed of 1800rpm for 20min, dry at 120°C, and finally calcinate the dried powder in a muffle furnace at 600°C for 3h to obtain a white solid powder with a core-shell structure adsorption agent. The total mass of water added twice is 20g.
[0025] The precise structure of the white solid powder adsorbent is SiO after multiple analyzes 2 MgSi 0.84 o 2.68 , that is, the silicon-magnesium complex is coated on the surface of silica microspheres to form a core-shell structure, and the powder has a large specific surface area and has good adsorption properties, which can effectively adsorb organic dyes in water, such as: crystal violet, Rhodin Ming B et al. The maximum adsorption capacity of the adsorbent for rhodamine B is 52.71 mg / g, and...
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