As shown in Fig. , COF@bio with imine linkages was synthesized using two monomers under room temperature and atmospheric pressure, without any catalysts. One of the monomers, DFF, is a common biomass derivative produced through the catalytic oxidation of carbohydrates or carbohydrate-derived molecules. The other monomer, TAB, can also be synthesized from biomass derivatives. This work serves as a proof-of-concept for COF@bio, where all the monomers are derived from biomass and their derivatives. In addition, the synthesis of COF@bio occurred under mild conditions, and the preparation process was straightforward, largely due to the high reactivity of DFF. As a result, COF@bio has shown potential for mass production in industrial applications. COF@bio was obtained through a facile one-step strategy: DFF, TAB, and a mixed solvent were combined and reacted for 12 hours. More detailed information is provided in the supporting information. To further enhance the electronic conductivity of the material, COF@bio was grown in situ on the exterior of CNT to form COF@bio composites, as illustrated in Fig. . Fig. ) Synthesis route of COF@bio. b) Illustration of the COF@bio with CNT composites preparation.