Construction of a Hierarchical Structure of Bimetallic\nOxide Derived from Metal–Organic Frameworks

Abstract

Bimetallic oxides are a class of\npromising advanced functional\nmetal nanomaterials, especially in terms of the sophisticated hierarchical\nstructure of bimetallic oxide, which not only is in favor of enhancing\ntheir intrinsic physiochemical properties because of more accessible\nactives sites but also is capable of integrating the synergistic effect\nbetween two metals. Herein, we report a novel strategy to controllably\nconstruct bimetallic CuO/ZnO nanomaterials with sophisticated hierarchical\nstructure through a pseudomorphic transformation and subsequent calcination\nprocess. The resulting unique hierarchical structure of ZnO/CuO is\nprimarily constituted of a nanosphere and a rod grafted in a microscale\ncube with multidimensional size, which thus results in excellent dispersion,\nsuperior charge-transport capability, and abundant accessible active\nsites. Impressively, the optimized hierarchical structure product\nof CuO/ZnO (4:1) demonstrates an excellent glucose detection performance\nwith a rapid response time, a wide linear range, a low detection limit,\nand strong antiinterference ability, realizing more advantages than\ncommercial CuO or ZnO materials and shedding light on the positive\ncorrelation of the structure and performance. This study provides\na new strategy for the controllable fabrication of the sophisticated\nhierarchical structure of bimetallic oxide nanomaterials.