T he hollow particles of Y(OH)CO 3 (see Fig.5)were prepared by the coordi-nation reaction which dissolved the pre-existing particles of AgI in Na 2 S 2 O 3 concentrated solutions.

• 并加入配合剂Na2S2O3；运用生成稳定配合物的方法溶解内置核；最终得到Y(OH)CO3中空粒子.