%0 Online Multimedia
%A Li, Qianqian
%A Deng, Wenjie
%A Li, Chuanhao
%A Sun, Qingyun
%A Huang, Fangzhi
%A Zhao, Yan
%A Li, Shikuo
%D 2018
%T High-Flux
Oil/Water Separation with Interfacial Capillary
Effect in Switchable Superwetting Cu(OH)2@ZIF‑8
Nanowire Membranes
%U https://acs.figshare.com/articles/media/High-Flux_Oil_Water_Separation_with_Interfacial_Capillary_Effect_in_Switchable_Superwetting_Cu_OH_sub_2_sub_ZIF_8_Nanowire_Membranes/7302365
%R 10.1021/acsami.8b13983.s003
%2 https://acs.figshare.com/ndownloader/files/13488860
%K 162 nm exhibits
%K heavy-metal ions removal
%K ZIF
%K 15 μ m
%K -8
%K core
%K Interfacial Capillary Effect
%K efficiency
%K separation
%K CA
%K nanowire
%K superwetting membranes
%K Cu
%K surface
%K water contact angle
%X Highly
ordered architectures with roughness and porous surface
are the key challenges toward developing smart superwetting membranes.
We prepared switchable superwetting Cu(OH)2@ZIF-8 core/shell
nanowire membranes for high-flux oil/water separation as well as simultaneous
heavy-metal ions removal in one step. The well-defined Cu(OH)2@ZIF-8 core/shell nanowire grown on copper mesh with average
length of ca. 15 μm and diameter of ca. 162 nm exhibits high
water contact angle (CA) of ca. 153 ± 0.6°. After modified
by ethanol, the membrane holds the reverse superwettability with oil
(dichloromethane as an example) CA of ca. 155 ± 0.8° underwater.
The separation efficiencies of the membranes are higher than that
of 97.2% with a remarkable flux rate higher than 90 000 L m–2 h–1 for the immiscible oil/water
mixture. And the removal efficiency for Cr3+ ions at 10
ppb can arrive at 99.2 wt % in the toluene-in-water emulsion. The
high performances of the smart superwetting membranes can be attributed
to the interfacial capillary effects of the hierarchical Cu(OH)2@ZIF-8 core/shell nanostructures. This work may provide a
new insight into the design of smart superwetting surfaces for oil/water
separation and target adsorption in one step.
%I ACS Publications