Hierarchical WO_3 porous microspheres and their sensing properties

摘要

Materials with porous and hierarchical structures are of great interest for potential use in energy and environmental applications. Here, we fabricate the WO_3 microspheres which consist of the nanosheets by using a simple hydrothermal process. The likely formation mechanism of the porous microspheres is proposed based on the time-dependent experiments. As a consequence of the unique hierarchical and porous architecture, the micro-spheres show excellent gas sensing properties due to their large amount of petals and pores, which benefited for the gas diffusion.