A hierarchical structure is a prerequisite for a liquid super-repellent surface due to its capability to catch large numbers of fine air-pockets. In the present work, a series of hierarchical nanocomposites with anti-wettability were fabricated by in situ deposition of spherical SiO₂ nanoparticles on Te@C nanofibers. N₂ adsorption–desorption isotherms were used for the first time to characterize the air-pockets and relate them to the wettability of the nanocomposites. The results indicate that superamphiphobicity is a contribution of a delicate synergistic effect between a micro-scale structure and a nano-scale structure. Significant dominance of either of them led to reduced superamphiphobicity. The superamphiphobic “beads on a string” materials should meet the following features: higher S_BET that ensures enough air-pockets (S_BET value of the superamphiphobic sample is much higher than that of the superhydrophobic one); and the most important, a “continuous and balanced” distribution of micro and macro air-pockets derived from hierarchical structures.

Core(TiO₂)/shell(SiO₂) nanoparticles, with a void layer between the TiO₂ core and the silica layer, act as phase-selectivity photocatalysts for the photodecomposition of organic pollutants (gas phase) without any damage to their organic supports (solid phase).

By changing hydrothermal condition and post‐heat‐treatment temperature, silica‐coated TiO₂ nanotubes are obtained successfully. The effects of gas‐supported process on tubular morphology, crystallinity, and photocatalytic activity are discussed. It is found that the sample prepared at hydrothermal treatment (180°C/9 h) and calcination (650°C/2 h) shows perfect open‐ended tubular morphology and increased crystallinity. The photoactivity of the sample is proved to be 5 times higher than that of TiO₂ nanoparticles.