Figure 1.

Synthesis and characterization of Nb₂C–MSNs composite nanosheets. a) Schematic illustration showing the synthetic process of Nb₂C–MSNs composite nanosheets. b–d) SEM images of: b) Nb₂AlC ceramics, c) multilayer Nb₂C after HF etching, and d) single‐layer Nb₂C nanosheets after TPAOH intercalation. e) Bright‐field TEM (left), dark‐field TEM (middle), and SEM (right) images of Nb₂C–MSNs (vertical (down) and lateral (upper) views, scale bar: 50 nm). f) SEM image and corresponding elemental mapping of Nb₂C–MSNs composite nanosheets (Nb, C, Si, and O; scale bar: 50 nm).