fig3
Figure 3. Schematic diagrams illustrating piezocataytic hydrogen production process based on (A) charge screening effect and (B) energy band theory; (C) Schematic diagram of piezocatalytic hydrogen production process over Bi2Fe4O9 nanosheets. This figure is quoted with permission from Du et al.[6]; (D) Schematic diagram presenting the crystal structures of (i) pristine ZnSnO3 and ZnSnO3 NWs with (ii) moderated and (iii) excessive oxygen vacancies for hydrogen production. This figure is quoted with permission from Wang et al.[22]; (E) Schematic illustration of the piezocatalytic hydorgen production process of BaMoO4-BaWO4-Ag. This figure is quoted with permission from Kuru et al.[23]; (F) Schematic diagram illustrating the mechanism of piezocatalytic degradation of bisphenol A (BPA) and hydrogen production by Ti3C2/SAMs-NH2, and (G) the corresponding H2 production rates. Figure F and G are quoted with permission from Wang et al.[24].