In a typical procedure, 0.2 g of sodium alginate was mixed with
30 mL of ultrapure water in a 100 mL beaker with constant magnetic
stirring. One gram of the prepared Mg/Al LDH was added to the solution
and mixed for 2 h at 25 °C. The solution was subsequently added
dropwise to a 250 mL beaker containing 100 mL of 0.3 mol/L Ca(NO3)2·6H2O to produce hydrogel beads
(LB). The prepared beads were stirred for 10 min, filtered, washed
with ultrapure water, and then dried in a freeze dryer for 24 h.
30 mL of ultrapure water in a 100 mL beaker with constant magnetic
stirring. One gram of the prepared Mg/Al LDH was added to the solution
and mixed for 2 h at 25 °C. The solution was subsequently added
dropwise to a 250 mL beaker containing 100 mL of 0.3 mol/L Ca(NO3)2·6H2O to produce hydrogel beads
(LB). The prepared beads were stirred for 10 min, filtered, washed
with ultrapure water, and then dried in a freeze dryer for 24 h.
