光催化预处理耦合Cu-Zn共掺杂TiO2:玉米秸秆定向转化制甲醇技术研究OA

To achieve efficient bio-methanol production under mild conditions,this study developed a two-step strategy u-sing corn straw as the feedstock.First,corn straw was converted to glucose through a process that integrated photocatalysis with cellulase hydrolysis.Subsequently,the glucose in the enzymatic hydrolysate was photocatalytically converted to metha-nol at room temperature and atmospheric pressure using a Cu-Zn co-doped TiO2(CZ-TiO2)photocatalyst.The CZ-TiO2 cat-alyst was successfully synthesized via hydrothermal and impregnation methods.Characterization by SEM,XRD,FTIR,and XPS confirmed the successful incorporation of Cu and Zn into the TiO2 lattice,which effectively broadened the light absorp-tion range and enhanced the separation efficiency of photogenerated electron-hole pairs.Under the conditions of 200 mg of CZ-TiO2,1 mL enzymatic hydrolysate,1 mL deionized water,and 8 mL acetonitrile,with 24 h of illumination,the metha-nol yield reached 5.99％,which is nearly 54 times higher than that of undoped TiO2(0.11％).The study demonstrates that the synergistic effect of Cu and Zn effectively modulates the electronic structure of TiO2,promoting the cleavage of C-C bonds in glucose and its directed reduction.