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Golden carbon nanotube membrane for continuous flow catalysis

Liu, Yanbiao and Zheng, Yuying and Du, Bowen and Nasaruddin, Ricca Rahman and Chen, Tiankai and Xie, Jianping (2017) Golden carbon nanotube membrane for continuous flow catalysis. Industrial & Engineering Chemistry Research, 56 (11). pp. 2999-3007. ISSN 0888-5885

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Abstract

In this work, a high-performance catalytic membrane, composed of ultrasmall gold nanoclusters (AuNCs) and high aspect-ratio carbon nanotubes (CNTs), was designed for the continuous-flow catalytic reactions. In this hybrid catalytic membrane, the Au core of the NCs serves as high-performance catalyst, and the ligand of the NCs plays two key roles: (1) as a well-defined surfactant assembly to effectively dissolve CNTs in aqueous solution and (2) as an efficient protecting ligand for Au core to avoid agglomeration. Due to the above-mentioned features, a homogeneous 3D self-support catalytic membrane can be readily fabricated by vacuum filtration of the hybrid AuNCs/CNTs. The catalytic activity of the as-designed catalytic membrane was evaluated using 4-nitrophenol hydrogenation as a model catalytic reaction. The data suggest that the continuous flow catalytic reactor could achieve complete conversion of the substrate (i.e., 4-nitrophenol) within a single flow through the membrane with a hydraulic residence time (τ) of 3.0 s. The catalytic membrane also showed enhanced catalytic kinetics as compared to the conventional batch reactor due to the convectively enhanced mass transfer. In addition, three important parameters, including the Au loading amount, substrate concentration, and flow rate, were identified as key factors that could affect the performance of the catalytic membrane.

Item Type: Article (Journal)
Additional Information: 8629/69314
Uncontrolled Keywords: Golden carbon nanotube membrane, continuous flow catalysis
Subjects: Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General) > TA170 Environmental 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: 12 Jun 2019 10:45
Last Modified: 12 Jun 2019 10:45
URI: http://irep.iium.edu.my/id/eprint/69314

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