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].