[Zn (NH 3 ) n] (OH ) 2 + H 2 S → ZnS i + 2H 2 0 + nNH 3 4) Washing and pulverizing: The nZnS-B a S0 4 crystal filter cake is washed with distilled water or ethanol, and the nZnS-BaS0 4 crystal filter cake separated by filtration is washed and pulverized to obtain a nano-Lide powder product.
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