Journal article
Polyaniline-Coated Carbon Nanotube Ultrafiltration Membranes: Enhanced Anodic Stability for In Situ Cleaning and Electro-Oxidation Processes
ACS applied materials & interfaces, v 8(34), pp 22574-22584
31 Aug 2016
PMID: 27525344
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Electrically conducting membranes (ECMs) have been reported to be efficient in fouling prevention and destruction of aqueous chemical compounds. In the current study, highly conductive and anodically stable composite polyaniline-carbon nanotube (PANI-CNT) ultrafiltration (UF) ECMs were fabricated through a process of electro-polymerization of aniline on a CNT substrate under acidic conditions. The resulting PANI-CNT OF ECMs were characterized by scanning electron microscopy, atomic force microscopy, a four-point conductivity probe, cyclic voltammetry, and contact angle goniometry. The utilization of the PANI-CNT material led to significant advantages, including: (1) increased electrical conductivity by nearly an order of magnitude; (2) increased surface hydrophilicity while not impacting membrane selectivity or permeability; and (3) greatly improved stability under anodic conditions. The membrane's anodic stability was evaluated in a pH-controlled aqueous environment under a-wide range of anodic potentials using a three-electrode cell. Results indicate a significantly reduced degradation rate in comparison to a CNT-poly(vinyl alcohol) ECM under high anodic potentials. Fouling experiments conducted with bovine serum albumin demonstrated the capacity of the PANI-CNT ECMs for in situ oxidative cleaning, with membrane flux restored to its initial value under an applied potential of 3 V. Additionally, a model organic compound (methylene blue) was electrochemically transformed at high efficiency (90%) in a single pass through the anodically charged ECM.
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Details
- Title
- Polyaniline-Coated Carbon Nanotube Ultrafiltration Membranes: Enhanced Anodic Stability for In Situ Cleaning and Electro-Oxidation Processes
- Creators
- Wenyan Duan - University of California, RiversideAvner Ronen - University of California, RiversideSharon Walker - University of California, RiversideDavid Jassby - University of California, Riverside
- Publication Details
- ACS applied materials & interfaces, v 8(34), pp 22574-22584
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 11
- Grant note
- BARD; US-Israel Binational Science Foundation United States Israel Binational Agricultural Research and Development Fund; US-Israel Binational Science Foundation FI-497-2014 / Vaadia-BARD Postdoctoral Fellowship Award; US-Israel Binational Science Foundation 1553756 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Engineering
- Web of Science ID
- WOS:000382514100088
- Scopus ID
- 2-s2.0-84985957010
- Other Identifier
- 991021229881904721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology