Abstract
Carboxylated nanocrystalline cellulose (CNCC) was prepared by oxidation degradation of microcrystalline cellulose (MCC) using ammonium peroxydisulfate and modified with Fe3O4 nanoparticles to form Fe3O4-CNCC nanocomposite via simple refluxing process. The Fe3O4-CNCC nanocomposite doped poly(3,4-ethylenedioxythiophene) (PEDOT) was successfully decorated on the glassy carbon electrode (GCE) by electrochemical deposition. The PEDOT/Fe3O4-CNCC modified GCE with enlarged real electrochemical surface area was used to determine nitrite with high selectivity, sensitivity and outstanding reproducibility. Using amperometric current-time (i-t) curve, the proposed sensor provided a wider linear range (0.5-2500 ∆M) and a lower detection limit (0.1 ∆M) towards nitrite compared with the method of differential pulse voltammetry (DPV). This analytical method gave good selectivity in the practical measurement of nitrite in pickles.
Highlights
Nanocellulose (NCC), one kind of sustainable functional nanomaterials, is derived from native cellulose.[1,2,3,4,5] Their morphology mainly depends on the source of precursor cellulose and the conditions of preparation
carboxylated nanocrystalline cellulose (CNCC) was prepared by degradation of microcrystalline cellulose (MCC) using ammonium peroxydisulfate, and Fe3O4-CNCC was synthesized by a simple refluxing process
The results suggested that the PEDOT/ Fe3O4-CNCC exhibited high selectivity for nitrite detection
Summary
Nanocellulose (NCC), one kind of sustainable functional nanomaterials, is derived from native cellulose.[1,2,3,4,5] Their morphology mainly depends on the source of precursor cellulose and the conditions of preparation. As an important magnetic nanomaterial, Fe3O4 magnetic nanoparticle received much attention and extensive investigation in the past years for its excellent electrocatalytic activity, biocompatibility and absorption ability.[19,20,21,22,23] For example, a sensitive electrochemical biosensor for the detection of H2O2 from living cells has been developed based on graphene blended with Fe3O4 nanoparticles.[24] Fe3O4 nanosphere decorated with Au nanoparticles was used as a kind of catalyst for the detection of As(III) in water.[25] Fe3O4 nanoparticles are thermodynamically unstable and tend to aggregate to form bulk particle To overcome this problem, Fe3O4– CNCC was synthesized by dispersing Fe3O4 nanoparticles on the surface of CNCC in this work. This method gave good selectivity in the practical measurement of nitrite in pickles
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
