Abstract

The diffusion of oil and organic pigments has become a serious environmental pollution problem. The combination of superhydrophobic and photocatalysis is expected to provide an effective, economical and simple solution to this problem. In this paper, a kind of superhydrophobic biomass-based carbon composites bearing a hierarchically structured surface were prepared through direct carbonization of deep eutectic solvents modified porous graphitic nitride (g-C3N4) nanosheets@kapok fiber composites (CNS/CKF) under low temperature of 350 °C. The results show that the CNS/CKF composites exhibit outstanding superhydrophobicity (with water contact angle of 162.2°) and process high adsorption capacity up to 28.3–58.1 times its self-weight for a series of oils and organic solvents. The CNS/CKF exhibited excellent visible-light photocatalytic performance, stability and reliability in the degradation of rhodamine b (RhB) solution, and its photocatalytic mechanism was discussed. This work sheds light on combining photocatalysis with special wettability for developing multifunctional materials.

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