Rational design of high-performance continuous-flow microreactors based on gold nanoclusters and graphene for catalysis

Liu, Yanbiao and Liu, Xiang and Yang, Shengnan and Li, Fang and Shen, Chensi and Huang, Manhong and Li, Junjing and Nasaruddin, Ricca Rahman and Xie, Jianping (2018) Rational design of high-performance continuous-flow microreactors based on gold nanoclusters and graphene for catalysis. ACS Sustainable Chemistry & Engineering, 6 (11). pp. 15425-15433. ISSN 2168-0485

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Abstract

In this work, we rationally designed a high-performance microreactor system for continuous-flow catalysis. The membrane consists of ultrasmall gold nanoclusters (AuNCs) and two-dimensional graphene. The Au cores of the NCs act as catalysts, while their ligands have two functions: (1) protecting the Au cores to avoid agglomeration and (2) providing a well-defined surfactant assembly to disperse graphene in aqueous solution. Hydrogenation of 4-nitrophenol (4-NP) was employed as model reaction to evaluate catalytic activity. The catalytic membrane microreactor demonstrated excellent catalytic activity and stability, where complete 4-NP conversion was readily achieved via a single pass through the membrane. This desirable performance was maintained over 12 h of continuous operation, although a certain amount of organic buildup on the membrane was observed. The catalytic membrane microreactor outperforms conventional batch reactors due to its improved mass transport. 4-NP-spiked real water samples were also completely converted. This study provides new insights for the rational design of membrane reactors for industrial applications.

Item Type:	Article (Journal)
Additional Information:	8629/69311
Uncontrolled Keywords:	4-Nitrophenol; Catalytic membrane microreactor; Gold nanoclusters; Reduced graphene oxide
Subjects:	Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) > TA170 Environmental engineering. Sustainable engineering T Technology > TP Chemical technology > TP155 Chemical engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Biotechnology Engineering Kulliyyah of Engineering
Depositing User:	Dr Ricca Rahman Nasaruddin
Date Deposited:	11 Jun 2019 12:09
Last Modified:	11 Jun 2019 12:09
URI:	http://irep.iium.edu.my/id/eprint/69311

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