Page 97 - 精细化工2019年第8期
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第 36 卷第 8 期 精 细 化 工 Vol.36, No.8
201 9 年 8 月 FINE CHEMICALS Aug. 2019
催化与分离提纯技术
纳米镍分子印迹催化剂的制备及
选择性催化对硝基苯甲醇
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高 磊,刘甜甜,杨雨滋,王圣陶,袁新华
(江苏大学 材料科学与工程学院,江苏 镇江 212013)
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。
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
中图分类号:TQ317 文献标识码:A 文章编号:1003-5214 (2019) 08-1585-06
Preparation of Ni Nanoparticle Molecularly Imprinted Polymer and
Its Selective Catalyzing p-Nitrobenzyl Alcohol
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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)
Abstract: 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 H 2O 2 as oxidant, the conversion of p-NBA reaches 72% after 1 h 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.
Key words: molecularly imprinted polymer; Ni nanoparticle; p-nitrobenzyl alcohol; oxidation; selectivity;
catalysis technology
取代苯甲醇选择性氧化生成相应的醛基化合物 酸氧化法、高锰酸钾氧化法以及利用 DMSO 和酸酐
是精细化学品和有机中间体合成中的重要反应 [1-2] , 氧化方法等。但这些氧化方法大都存在后处理难、
其合成方法倍受关注 [3-4] 。传统工艺大多采用稀硝酸 没有选择性、转化率低、对环境产生极大的污染等
来催化该反应,此外实验室还可采用铬酐(CrO 3 )铬 问题。因此众多科研工作者通过跨学科的合作,在制
收稿日期:2018-11-11; 定用日期:2019-02-25; DOI: 10.13550/j.jxhg.20180835
基金项目:国家自然科学基金资助项目(20704019,51603093);江苏省双创团队项目(2015026)
作者简介:高 磊(1993—),男,硕士生。联系人:袁新华(1975—),男,教授,E-mail:yuanxh@ujs.edu.cn。