Hexagonal CoOOH Nanoflakes Synthesized From Three-Dimensional Cellulose Membrane Matrix With Enhanced Detection of Ascorbic Acid

Abstract

In this work, cobalt oxyhydroxide (CoOOH) nanoflakes/cellulose composite membranes (CCM) were fabricated by a simple one-step method and green route without further treatment. The CoOOH nanoflakes were synthesized in the high-purity cellulose membranes (CM) matrix that expected to enhance its detection performance of ascorbic acid in comparison to the traditional paper-based sensors that were made of commercially available filter paper. The structure and properties of CM and CCM were characterized by SEM, EDS, FT-IR, XRD and XPS, etc. The combination mechanism between nanoflakes and cellulose was well analyzed and discussed by various characterizations and experiments. When the CCM was immersed into the ascorbic acid (AA) solution, the color changing from colorless to blue was observed only in 2 min. Furthermore, the CCM can be used for AA determination in real samples.