聚烯丙基氯化铵调控制备特殊形貌的碳酸铈

Controlled synthesis of special morphologies cerium carbonate by PAH

以阳离子聚电解质聚烯丙基氯化铵(PAH)为模板剂,采用液相沉淀法制备出规则形貌的花瓣状碳酸铈粒子。通过改变加料方式、PAH浓度、反应温度等因素,研究PAH在其中的作用。研究认为,PAH在制备碳酸铈粒子过程中,PAH与Ce3+形成π-烯丙基络合物,诱导花瓣状碳酸铈晶核的形成,从而控制碳酸铈粒子的形貌及其尺寸大小。

The regular petal shaped Ce2（CO3）3 particles were prepared in the liquid phase system by using poly allylamine hydrochloride（PAH） as template. The role of PAH in the above process was investigated by changing the feeding mode, PAH concentration, and reaction temperature. In the process of preparation of Ce2（CO3）3 particle, PAH and Ce3＋ formed n-allyl and complex to induce the formation of he petal shaped crystal nucleus of Ce2（CO3）3 and control the morphology and size of Ce2（CO3）3 particle.