Because of the lack of proper pore structure, the development of ultra-fast responding and recovering gas sensors materials remains a challenge. Herein, we report the synthesis of hollowed-out hierarchical α-Fe2O3nanorods via the interfacial-reaction of FeC2O4·2H2O with NaOH for the first time. The as-prepared hierarchical nanorods assembled by interlaced ultrathin nanosheets (with thickness of around 3 nm) possess large specific surface area and novel open-style pore structure, which endow it with large amount of gas adsorption and rapid gas diffusion. Gas sensing measuremen...
