Abstract
Recently, graphene oxide (GO) membranes are highly attractive for their exceptional separation performance. However, their sieving characteristics limit GO membranes for some important applications where organics are preferred or organic solvents are employed. In this work, a novel cross-linked graphene (CG) membrane is fabricated through compressing and then reducing a cross-linked GO aerogel. It achieved high-performance of organics separation with high flux (225Lm−2h−1) and purity (>99.98%) even in a cross-flow separation model, where water was intercepted. Deep insight revealed that both the converted surface wettability and the remaining channels in the CG membrane were crucial for the high-performance of organics separation. Beyond that, this CG membrane offers many advantages, such as facile preparation, self-supporting, structural stability and adaptation in harsh acidic/basic/high-temperature conditions, demonstrating its great potential for practical applications.
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