Synthesis and characterization of gadolinium doped ceria-carbonate dual-phase membranes for carbon dioxide separation

Increased atmospheric CO2 concentration has caused severe environmental issues such as global warming and ocean acidification. In this work, Gd0.1Ce0.9O1.95-Li2CO3-Na2CO3 (GDC-LNC) ceramic-carbonate dual-phase membranes for electrochemical separation of CO2 were fabricated by a novel phase-inversion combined with carbonate solidification method. The Li/Na elements were left in the GDC ceramic due to the carbonation solution mixed with water as curing agent to solidify supports, which may modify the wettability of GDC with LNC. The maximum CO2 flux reached as much as 0.301 mL min(-1)cm(-2) and the GDC-LNC dual-phase membranes exhibit stable CO2 permeation, suggesting a promising prospect towards future carbon storage and separation applications. (C) 2017 Elsevier B.V. All rights reserved.