Urea Enzymolysis‐Induced Ions Replacing: A Promising Strategy for One‐Pot Loading of Core–Shell Heterojunction on 1D Catalyst Support

Abstract Even distribution of core–shell heterojunction on porous catalyst supports is promising to get the super‐catalysts, yet laborious preparation hinders the wide application. A novel strategy of urea enzymolysis‐induced ions replacement is proposed for one‐pot loading of Bi 12 O 17 Cl 2 @Bi 48 Al 2 O 75 core–shell heterojunction onto porous Al 2 O 3 nanorod (named as Al 2 O 3 ‐Bi 12 O 17 Cl 2 @Bi 48 Al 2 O 75 ). The clever combination of urea enzymolysis and precipitation reactions that consume the ions generated in urea enzymolysis can switch the “on‐off” of urease, and thus allow the precise controlling of the concentration and existence time of the ions, as well as ions replacement. It is the urea enzymolysis‐induced ions replacing strategy that can generate the unique structure of Al 2 O 3 ‐Bi 12 O 17 Cl 2 @Bi 48 Al 2 O 75 , and it is the distinctive structure that can get the selectivity of 96% benzaldehyde with 90% benzyl alcohol (BA) conversion in the photocatalytic oxidation of BA. The ions replacement, the growth of Al 2 O 3 ‐Bi 12 O 17 Cl 2 @Bi 48 Al 2 O 75 , and the photocatalytic mechanism are investigated in detail. This work highlights a novel and convenient strategy for one‐pot loading core–shell heterojunction onto porous nanorod support, unveils a fresh biosynthesis of nanomaterials with elaborate structure, and thus paves the way for wide application of elaborate nanomaterials.