华东理工大学学报（自然科学版）2017，Vol.43Issue(1)：16-22,35,8.DOI:10.14135/j.cnki.1006-3080.2017.01.003
基于聚多巴胺原位还原修饰的SiO2@PDA@Au 复合材料的制备及催化性能
Synthesis and Catalytic Properties of SiO2@PDA@Au Composites Based on Polydopamine
摘要
Abstract
Due to the mild working condition and good selectivity as a catalyst,gold nanoparticles (AuNPs)have attracted increasing attention and were widely used in multi-phase green catalytic process. However,AuNPs in solution are unstable,susceptible to aggregation,and difficult in recovery which limits their applications.Inspired by the universal adhesive ability and redox activity of polydopamine(PDA),the catalytic particle(SiO2@PDA@Au),composed of a silica core particle,a PDA interlayer coated on the core, and the in-situ reduced AuNPs deposited on the PDA layer,was designed and prepared.PDA can be coated on SiO2 surface tightly and continuously,and the in-situ reduction and loading of AuNPs can be efficiently achieved.The amount of AuNPs increases upon increasing the thickness of PDA.The obtained AuNPs are around 30 nm in diameter with narrow size distribution and without aggregation.The SiO2@PDA@Au hybrid catalysts with 1 .59% of AuNPs loaded exhibit good catalytic performance (Kapp=1 .6134 min-1 ) with excellent recycling stability for the reduction reaction of methylene blue(MB).关键词
金纳米粒子/聚多巴胺/复合材料/催化剂Key words
AuNPs/polydopamine/composite material/catalyst分类
化学化工引用本文复制引用
闫孟飞,韩霞,刘洪来..基于聚多巴胺原位还原修饰的SiO2@PDA@Au 复合材料的制备及催化性能[J].华东理工大学学报（自然科学版）,2017,43(1):16-22,35,8.基金项目
国家自然科学基金(91534103) （91534103）
