Zn2+ induced self-assembled fabrication of marigold-like ZnO microflower@Ni(OH)2 three-dimensional nanosheets for nonenzymatic glucose sensing. (1st April 2022)

• Record Type: Journal Article
• Authors: Waqas, Muhammad; Liu, Chengzhou; Huang, Qiulan; Zhang, Xiaoxia; Fan, Youjun; Jiang, Zhe; Wang, Xiaoqu; Chen, Wei
• Is Part Of: Electrochimica acta. Volume 410(2022)
• Publication Date: 2022-04-01
• Subjects: Electrochemical glucose sensor -- Zn2+-induced self-assembly -- ZnO microflowers -- Ni(OH)2 nanosheet -- Core-shell structure; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2022.140040
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: Ni(OH)2 3D nanosheet-coated marigold-like ZnO (mg-ZnO@Ni(OH)2 NSs) is prepared. A novel nonenzymatic glucose sensor based on mg-ZnO@Ni(OH)2 NSs is fabricated. The synergistic effect between mg-ZnO and Ni(OH)2 NSs enhances the catalytic activity. The fabricated sensor shows good performance for glucose monitoring in human serum. Abstract: Precise control over the structure and morphology of nano/microarchitectures is the topic of immense interest to tune their physical features and chemical aspects for desired applications. In this work, a novel and effective Ni(OH)2 three-dimensional nanosheet-coated marigold-like ZnO microflower (mg-ZnO@Ni(OH)2 NSs) hybrid is designed for the nonenzymatic electrochemical determination of glucose. The morphological evolution of mg-ZnO and mg-ZnO@Ni(OH)2 NSs was achieved by a one-pot solvothermal strategy through control over the reaction conditions without any assistance of an external shape-controlling surfactant. Furthermore, the as-fabricated mg-ZnO and mg-ZnO@Ni(OH)2 NSs were systematically evaluated by different spectroscopic, microscopic and electrochemical characterization tools. The results indicate that highly exposed homogeneous nanocorners of mg-ZnO and the synergetic effect of Ni(OH)2 coating, collectively improve the electrocatalytic efficiency of the designed catalyst. The mg-ZnO@Ni(OH)2 NS-based sensing electrode exhibits excellent amperometric performance for glucose monitoring, comprising satisfactory sensitivity (259.78 and 62.82 μA mM −1 cm −2 ), wide linear range (0.084–0.941 mM and 0.941–6.50 mM), low limit of detection (0.06 µM, S / N = 3), good stability and high detection selectivity. Moreover, the designed sensor is promising for the potential application in the real-time glucose detection of human serum samples. Graphical abstract: Image, graphical abstract