摘要
以对硝基苯甲醇(p-NBA)和六水合硝酸镍的络合物为模板分子,丙烯酰胺(AM)为功能单体,二甲基丙烯酸乙二醇酯(EGDMA)为交联剂,采用本体聚合设计制备了镍纳米粒子分子印迹聚合物(Ni-MIP),通过FTIR、UV-Vis、SEM和TEM等手段进行了表征。以非分子印迹聚合物Ni-NIP和空白非印迹聚合物NIP为对照,考察了Ni-MIP对p-NBA的催化活性和选择性。结果表明:以水为溶剂时,过氧化氢(质量分数30%)氧化p-NBA的反应中,Ni-MIP为催化剂,反应1 h时p-NBA转化率72%,高于Ni-NIP(64%),NIP没有催化效果;在p-NBA结构类似物邻硝基苯甲醇(o-NBA)的反应中,Ni-MIP的转化率仅为24%,明显低于Ni-NIP的转化率(64%),说明Ni-MIP催化剂具有与底物分子p-NBA相匹配的印迹空腔位点,可实现特异性识别催化。
With complex of p-nitrobenzyl alcohol(p-NBA)and nickel nitrate hexahydrate as template molecule,acrylamide(AM)as functional monomer and ethylene glycol dimethacrylate(EGDMA)as crosslinking agent,the Ni nanoparticle molecularly imprinted polymer(Ni-MIP)was prepared by bulk polymerization.The prepared Ni-MIP was characterized by FTIR,UV-Vis,SEM and TEM.Using non-molecularly imprinted polymers of Ni-NIP and NIP as comparison samples,the catalytic activity and selectivity of Ni-MIP for p-NBA were investigated.The results show that in the oxidation reaction of p-NBA with water as solvent and H2O2 as oxidant,the conversion of p-NBA reaches 72%after 1h with Ni-MIP as catalyst.The conversion rate of p-NBA is 64%with Ni-NIP as catalyst,and NIP has no catalytic effect.The catalytic efficiency of Ni-MIP is 24%for p-NBA structural analogue of o-nitrobenzyl alcohol(o-NBA),which is much lower than that of Ni-NIP(64%).It is indicates that the Ni-MIP catalyst has imprinted cavity matching the substrate molecule p-NBA,which can realize specific recognition catalysis.
作者
高磊
刘甜甜
杨雨滋
王圣陶
袁新华
GAO Lei;LIU Tian-tian;YANG Yu-zi;WANG Sheng-tao;YUAN Xin-hua(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2019年第8期1585-1590,共6页
Fine Chemicals
基金
国家自然科学基金资助项目(20704019,51603093)
江苏省双创团队项目(2015026)
关键词
分子印迹聚合物
Ni纳米粒子
对硝基苯甲醇
氧化
选择性
催化技术
molecularly imprinted polymer
Ni nanoparticle
p-nitrobenzyl alcohol
oxidation
selectivity
catalysis technology
