Figure 1.

Schematic of the preparation process of CAFs. A nata-de-coco slice was cut by a laser (a), followed by freeze drying to obtain a fiber-like matrix consisting of BC nanofibers (b). The matrix containing silica sols (c) was reshaped by a small hole mold (d). After the silica gel skeleton was formed in the matrix (e), the fiber-like composite wet gel was dried at ambient pressure after hydrophobization to obtain CAFs (f).