摘要
聚烯丙基氯化铵(PAH)作为聚电解质自组装膜,被用于调控碳酸铈颗粒形貌及大小。通过IR分析,PAH与Ce3+配位发生sp2杂化,形成π-烯丙基络合物,同时,PAH中的N原子与Ce原子也络合成键,此络合物以三聚体形式存在,诱导晶核的形成,由于PAH带电,通过静电作用、晶格几何匹配和立体化学互补,使得晶体定向生长,最终合成由六棱片状组成的花瓣状Ce2(CO3)3。XRD、SEM、TEM分析表明,PAH对晶体(160)、(022)面都是抑制作用,(242)面为促进生长,(202)晶面基本不变,确定Ce2(CO3)3晶体定向生长趋势。
Polyallylamine hydrochloride（PAH） as self - assembled polyelectrolyte membrane was used for the morphology and size control of cerium carbonate particles. IR analysis showed that sp^2 hybridization was took place and π- allyl complex was formed between PAH and Ce^3＋ ions. At the same time, N atoms and Ce atoms of PAH were reacted to form complex existing in tripolymer which induced nucleation. Electrostatic interaction, lattice geometrical matching and stereochemistry comple- mentarity caused the directional crystal growth and petal shaped Ce2 （ CO3 ） 3 crystal were formed by accumulation of hexagon - like flake. XRD, SEM, TEM analysis showed that the crystal growth was inhibited at face（160） and （022） and promoted at face （242） by PAH, and the growth at face （202） did not affected by PAH.
出处
《稀土》
EI
CAS
CSCD
北大核心
2015年第2期9-14,共6页
Chinese Rare Earths
基金
国家杰出青年基金项目(51025416)
教育部长江学者和创新团队发展计划创新团队项目(IRT1065)
国家自然科学基金项目(201066010)
内蒙古自然科学基金项目(2012MS0206)
