Interlayer free - nickel doped silica membranes for desalination

This work shows for the first time the potential of nickel oxide silica membranes for desalination applications. Nickel oxide silica xerogels were synthesised via a sol-gel method including TEOS, nickel nitrate with and without addition of hydrogen peroxide. The effects of nickel addition (5% - 50 m...

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Published inIOP conference series. Materials Science and Engineering Vol. 172; no. 1; pp. 12001 - 12015
Main Authors Darmawan, A, Karlina, L, Astuti, Y, Sriatun, Wang, D K, Motuzas, J, da Costa, J C D
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.02.2017
Subjects
Desalination
Fluxes
Hydrogen peroxide
Interlayers
Membranes
Nickel oxides
Silicon dioxide
Sol-gel processes
Xerogels
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Summary:This work shows for the first time the potential of nickel oxide silica membranes for desalination applications. Nickel oxide silica xerogels were synthesised via a sol-gel method including TEOS, nickel nitrate with and without addition of hydrogen peroxide. The effects of nickel addition (5% - 50 mol %) on the structure-property relationship of the silica materials were systematically studied. The membrane performance were tested as a function of feed salt concentration (0.3-3.5 wt% NaCl) and temperature (27-60 °C). The membranes which were prepared using equal sol-gel conditions to the xerogel samples showed the raised feed temperatures resulted in increased water fluxes, whilst increasing the salt concentration resulted in decreased water fluxes. The membranes with addition of hydrogen peroxide exhibited better performances than their H2O2 absence counterpart. The salt rejection was in excess of 90% and the maximum flux observed was 7.3 kg m-2 h-1 at 60°C for a 0.3 wt% NaCl feed concentration.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/172/1/012001