Currently,NiO nanoarchitectures was mostly prepared by hydrothermal treatment, with template.The Ni(OH)_2 nanoarchitectures formed firstly,then further treated for getting NiO nanoarchitectures.As nanoarchitectures used to be prepared by template, which need to be removed in the subsequent process,the opcrater process was tedious, and it is difficult for industrial preparation.Flowerlike NiO nanoarchitectures,comprising self-assembled nanosheets,were synthesized by Ni(NO_3)_2,urea and ethanol under ...