期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 330, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2023.122622
关键词
Photo-enzyme integrated catalyst; 3DOM; Enzyme immobilization; Chiral synthesis; TiO2
In this study, photo-enzyme integrated catalysts were constructed by immobilizing AaeUPO as cross-linked enzyme aggregates (CLEAs) in Pd-loaded three-dimensional ordered macroporous titania (3DOM TiO2) with in situ photocatalytic H2O2 production. The prepared AaeUPO@3DOM TiO2-Pd exhibited higher catalytic efficiency compared with CLEAs-AaeUPO. The conversion of ethylbenzene to (R)-1-phenethyl alcohol was significantly improved, reaching 99%, with excellent stability and reusability.
The selective oxyfunctionalization of C-H and C--C bonds is highly important and catalyzed by unspecific peroxygenases (UPOs) which suffer from inactivation by hydrogen peroxide (H2O2). Herein, photo-enzyme in-tegrated catalysts were constructed by immobilizing AaeUPO as cross-linked enzyme aggregates (CLEAs) in Pd-loaded three-dimensional ordered macroporous titania (3DOM TiO2) with in situ photocatalytic H2O2 produc-tion. The prepared AaeUPO@3DOM TiO2-Pd obtained higher catalytic efficiency compared with CLEAs-AaeUPO. The conversion of ethylbenzene to (R)-1-phenethyl alcohol was significantly improved, reaching 99 % compared with free enzyme (38 %) and CLEAs-AaeUPO (49 %), with ee value of > 99 %. AaeUPO@3DOM TiO2-Pd exhibited good stability and reusability attributed to the protection of macropores and in situ H2O2 production. By using the designed 3DOM platform for photocatalysis and enzyme immobilization, the in situ photocatalytic generation of H2O2 was highly efficient, and the monodisperse CLEAs-AaeUPO in the macropores facilitated the contact of substrate and enzyme, thus obtaining excellent photo-enzyme coupled catalysis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据