Controlled Synthesis of Hierarchically Assembled Porous ZnO Microspheres with Enhanced Gas-Sensing Properties

Figure 3

(a) TEM images of the ZHC precursors nanosheets; ((b) and (c)) TEM images of porous ZnO nanosheets; (d) N₂ adsorption-desorption isotherm and BJH pore size distribution plots (inset) of the porous ZnO product calcined ZHC precursors.

(a)

(b)

(c)

(d)