NDLI: Synthesis of mesoporous carbon–silica nanocomposite water-treatment membranes using a triconstituent co-assembly method

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Inside back cover

Back cover

Journal of Materials Chemistry A Vol - 3 Issue - 9

Journal of Materials Chemistry A Vol - 3 Issue - 8

Journal of Materials Chemistry A Vol - 3 Issue - 7

Journal of Materials Chemistry A Vol - 3 Issue - 6

Journal of Materials Chemistry A Vol - 3 Issue - 5

Journal of Materials Chemistry A Vol -2

Journal of Materials Chemistry A Vol -1

Synthesis of mesoporous carbon–silica nanocomposite water-treatment membranes using a triconstituent co-assembly method

Content Provider	Royal Society of Chemistry (RSC)
Author	Kleitz, Freddy Lin, Chun Xiang C. Smart, Simon Chua, Yen T.
Copyright Year	2015
Abstract	A direct synthesis method is introduced to prepare mesoporous carbon–silica nanocomposite (CSN) membranes for water-treatment applications. Unlike the intricate and expensive nanocasting method, this triconstituent co-assembly method is a one-pot synthesis method using Pluronic F127 as the templating agent with a hybrid organic–inorganic matrix formed by tetraethylorthosilicate (TEOS), resorcinol and formaldehyde. The silica content is varied in the polymer solution to investigate the material properties, stability of the nanocomposite mesostructure and membrane performance in vacuum membrane distillation (VMD). The CSN materials are carbonised under nitrogen at temperatures of 600–900 °C without any significant lattice shrinkage, demonstrating excellent stability. They possess a highly ordered porous structure with moderate BET surface area (430–550 m2 g−1) and narrow pore size distribution at around 5.5–7.6 nm. Based on the FTIR and NMR analyses, there is no covalent bond between the carbon and silica networks, but the carbon compound was found to affect the condensation degree of the silica. Raising the temperature from 700 to 900 °C leads to further condensation of the carbon network, which in turn releases hydroxyl or water groups that can attack adjacent siloxane bonds. The CSN membranes performed well in VMD with water permeation flux up to 12 L m−2 h−1 and salt rejection >99%. This work shows that a different strategy of modifying silica-based membrane can be successfully applied for the desalination of saline waters through VMD.
Starting Page	10480
Ending Page	10491
Page Count	12
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	19
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta01328c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	TEOS CSN BET FTIR Mesoporous material Nanocomposite One-pot synthesis Composite material Tetraethyl orthosilicate Resorcinol Formaldehyde Silicon dioxide Polymer Membrane distillation Nitrogen Crystal structure Nuclear magnetic resonance Covalent bond Carbon Hydroxy group Siloxane Desalination
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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