文献类型：期刊文献

中文题名：Synergetic effect of polydopamine particles and in-situ fabricated gold nanoparticles on charge-dependent catalytic behaviors

作者：Xia Han[1];Xiaolu Chen[1];Mengfei Yan[1];Honglai Liu[1]

机构：[1]Key Laboratory for Advanced Materials and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2019

卷号：17

期号：3

起止页码：63

中文期刊名：Particuology

外文期刊名：颗粒学报（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2019_2020】；

基金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 91534103);the PetroChina Innovation Foundation (No. 2017D-5007-0204);the 111 Project of the Ministry of Education of China (No. B08021);Fundamental Research Funds for the Central Universities of China.

语种：英文

中文关键词：Poiydopamine;Gold;nanoparticle;Hybrid;catalyst;Adsorbent;Redox;mediator

摘要：The versatile catechol unit of polydopamine (PDA) endows this molecule with a broad ranging adhesive properties and reducibility.We prepared free-standing PDA particles by a simple self-polymerization and these particles served as both an effective reductant and scaffold for a hybrid catalyst.The raspberrylike nanocomposites featured a high density of AuNPs uniformly deposited on PDA particles (PDA@Au).This system was prepared in-situ with assistance from the active catechol and amine groups of the PDA particles.To quantify the effect of the PDA carriers,we studied the catalytic activity of the PDA and PDA@Au particles.The PDA particles showed a pronounced charge-dependent catalytic activity for reduction of cationic methylene blue,negatively-charged 4-nitrophenolate,and zwitterionic rhodamine B in the presence of borohydride,whereas PDA@AuNPs showed catalytic activity with a less pronounced charge-dependence of the catalytic efficiency of the AuNPs.The PDA particles served as a redox mediator and adsorbent accelerator in degradation of the dyes owing to its unique chemical structure.