Next Article in Journal
A Novel Laser 3D Printing Method for the Advanced Manufacturing of Protonic Ceramics
Next Article in Special Issue
Aquaporin-Containing Proteopolymersomes in Polyelectrolyte Multilayer Membranes
Previous Article in Journal
Towards Electrochemical Water Desalination Techniques: A Review on Capacitive Deionization, Membrane Capacitive Deionization and Flow Capacitive Deionization
Previous Article in Special Issue
Fabrication and Characterization of Ice Templated Membrane Supports from Portland Cement
Open AccessArticle

Tailored CNTs Buckypaper Membranes for the Removal of Humic Acid and Separation of Oil-In-Water Emulsions

1
Physics Department and Center for Environmental and Smart Technology, Faculty of Science, Fayoum University, Fayoum 63514, Egypt
2
Lehrstuhlfür Technische Chemie II, and Center for Water and Environmental Research (ZWU), University of Duisburg-Essen, 45141 Essen, Germany
3
Water Pollution Dept, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
4
Spectroscopy Dept, Physics Division, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
5
Materials Science & Engineering Department, School of Innovative Design Engineering, Egypt-Japan University of Science and Technology (E-JUST), 179 New Borg El-Arab City, Alexandria 21934, Egypt
*
Author to whom correspondence should be addressed.
Membranes 2020, 10(5), 97; https://doi.org/10.3390/membranes10050097
Received: 3 April 2020 / Revised: 8 May 2020 / Accepted: 9 May 2020 / Published: 12 May 2020
(This article belongs to the Special Issue Membranes: 10th Anniversary)
Carbon nanotubes (CNTs) are a robust material and proven as a promising candidate for a wide range of electronic, optoelectronic and environmental applications. In this work, two different methods were utilized for the preparation of CNTs exhibiting different aspect ratios via chemical vapor deposition (CVD). The as-prepared CNTs were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2adsorption isotherms, thermogravimetric analysis and Raman spectroscopy in order to investigate their morphological and structural properties. Free-standing CNTs “buckypaper” membranes were fabricated, characterized and tailored to meet the requirements of two applications, i.e., (1) the removal of humic acid (HA) from water and (2) separation of oil-in-water emulsions. It was revealed that the hydrophobic buckypapers showed high separation performance for Shell oil-in-water emulsions filtration, with up to 98% through the accumulation of oil droplets onto the membrane surface. The absorption capacity of buckypaper membranes for various organic liquids (oil, chloroform and toluene) was evaluated over 10 absorption cycles to investigate their recyclability and robustness. Moreover, surface modification was introduced to the pristine CNTs to increase their surface hydrophilicity and improve the pure water permeability of buckypapers. These modified buckypapers showed high flux for HA solutions and excellent HA rejection efficiency up to 95%via size exclusion and electrostatic repulsion mechanisms. View Full-Text
Keywords: carbon nanotubes; buckypapers; surface modification; humic acid; oil-in-water emulsions carbon nanotubes; buckypapers; surface modification; humic acid; oil-in-water emulsions
Show Figures

Graphical abstract

MDPI and ACS Style

Elnabawy, E.; Elsherbiny, I.M.A.; Abdelsamad, A.M.A.; Anis, B.; Hassan, A.; Ulbricht, M.; Khalil, A.S.G. Tailored CNTs Buckypaper Membranes for the Removal of Humic Acid and Separation of Oil-In-Water Emulsions. Membranes 2020, 10, 97.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop