Rose-like monodisperse bismuth subcarbonate hierarchical hollow microspheres: One-pot template-free fabrication and excellent visible light photocatalytic activity and photochemical stability for NO removal in indoor air

► Rose-like monodisperse hierarchical (BiO)2CO3 hollow microspheres are fabricated. ► The (BiO)2CO3 microspheres are self-assembled of single-crystalline nanosheets. ► Nitrogen is in situ doped into the lattice of hierarchical (BiO)2CO3 microspheres. ► The (BiO)2CO3 microspheres exhibit outstanding visible light activity for NO removal. ► The (BiO)2CO3 microspheres also exhibit high photochemical stability.