▎ 摘　　要

The fabrication of hierarchical layered TiO2/graphene/chitin composite membranes from the liquid crystal (LC) self-assembly of graphene oxide (GO) nanosheets, chitin nanospindles, and peroxotitanate is presented. The multilayer co-assembly evolves the lamellar arrangement to mimic a fascinating nacre's structure in the solidified graphene/chitin composites. The core of our routine is the self-assembly of both GO LCs and chitin LCs into a flexible nacre-mimicking membrane structured by graphene-wrapped chitin layers. The intrinsic electron mobility of graphene nanosheets and mechanical toughness of chitin nanocrystals endow these reinforced membranes with functions in catalyst supports and electronics. The nacre-mimicking composite homogeneously incorporates with TiO2 nanoparticles by simultaneous LC co-assembly of GO, chitin and peroxotitanate to afford layered TiO2/graphene/chitin composites that can function as a photocatalytic membrane for the mineralization of organic compounds. The LC integration creates hierarchical assemblies to increase the permeability of the TiO2/graphene/chitin nanohybrid membranes, offering its potential use for developing photocatalysis and separation for water and air treatment. The work not only presents the implementation of the nacre-mimicking LC self-assembly but also presents the sustainable materials as promising precursors for further investigation in energy storage and conversion and gas sensing. [GRAPHICS]