Preparation and Parameter Optimization of Nanoscale Magnesium Hydroxide Colloids by the Electrical Spark Discharge...

In this study, an electrical spark discharge method was used under ambient temperature and pressure conditions to prepare magnesium hydroxide nanocolloids. The entire preparation procedure was conducted in DW to ensure that the manufacturing environment does not cause airborne nanoparticle dispersion. Two colloid preparation experiments were conducted by adjusting the parameters of peak current (IP) and pulse cycle time (T _P). The results indicated that among all samples, the sample prepared with IP6 and T _P set to 70-70 μs exhibited the most favorable colloidal properties. Ultraviolet-visible spectrometry revealed a strong UV absorption peak at 192 nm, an absorbance value of 2.589, and zeta potential measurements showed a value of 35.2 mV. Transmission electron microscopy analysis indicated that the smallest particle size in the colloid was approximately 36.921 nm, with an almost spherical morphology, and that the lattice width of the particles was 0.237 nm.