A novel route to prepare LaNiO₃perovskite-type oxide nanofibers by electrospinning for glucose and hydrogen peroxide sensing

Abstract

Perovskite-type oxide LaNiO(3) nanofibers (LNFs) have been successfully synthesized by electrospinning and sequential calcinations. The electrospun LNFs modified carbon paste electrode was used to construct a nonenzymatic hydrogen peroxide (H(2)O(2)) sensor and glucose biosensor for the first time. The LNFs composition was verified by X-ray diffraction, and the morphologies were examined by scanning electron microscopy and transmission electron microscopy. Cyclic voltammetry and amperometry were used to evaluate the catalytic activity of the LNFs modified electrode towards H(2)O(2) and glucose. By using LNFs as electrocatalysts, the modified electrode showed high electrocatalytic activity for the oxidation of H(2)O(2) and glucose. Under the optimized conditions, the H(2)O(2) sensor exhibited a low detection limit down to 33.9 nM with a wide linear range from 0.05 to 1000 μM. The nonenzymatic sensor also showed fast response, long-term stability as well as a low detection limit for glucose.

La0.6Sr0.4FeO3‐δ and La0.6Sr0.4Co0.2Fe0.8O3‐δ Perovskite Materials for H2O2 and Glucose Electrochemical Sensors

“…Figure 6 shows CV curves obtained for LSCF modified electrode for different concentration of H 2 O 2 in 0.1 M KOH. The sensor showed an increase in the intensity of oxidation peak characterized by high linearity of current versus concentration of H 2 O 2 suggesting that the oxidation reaction was controlled by diffusion 12.…”

“…The electrooxidation mechanism of glucose in alkaline media may be then described by the following steps. First of all, as reported in Equation 1, LSCF is electrochemically oxidized to strong oxidizing agent Fe(III) and Co(III) species for effect of high oxidant ambient 12–16. Then, glucose is catalytically oxidized by the Fe(III) and Co(III) species producing gluconolactone.…”

“…Indeed, due to the presence of oxygen vacancies, some perovskite oxides have a high catalytic activity to oxygen reduction and oxidation, and are also suitable for H 2 O 2 decomposition 9. Different perovskite types, such as LaNi 0.5 Ti 0.5 O 3 10, LaNi 0.6 Co 0.4 O 3 nanocomposites 11 and LaNiO 3 nanofibers 12, have been proposed for H 2 O 2 and glucose monitoring 13–17.…”

Solids Go Bio: Inorganic Nanoparticles as Enzyme Mimics

“…Catalases are ubiquitous enzymes that catalyze the decomposition of hydrogen peroxide into water and oxygen (Scheme ) 56. Catalase‐like activities have also been reported for several other nanomaterials, such as CeO 2 (nanoceria),57 LaNiO 3 ,58 Co 3 O 4 ,30,59 FePt,24 Ir44 and Au/Pt nanostructures52 (Table 1). The number of applications for nanomaterial‐based catalase mimics are limited so far.…”

Highly sensitive hydrogen peroxide sensor based on a glassy carbon electrode modified with platinum nanoparticles on carbon nanofiber heterostructures

“…H 2 O 2 sensors based on electrocatalysis have received considerable attention with the advantages of high sensitivity, easy operation, and fast detection [8,9]. Nanostructured materials are well known for their unique electrochemical performance due to their extremely reduced sizes, large surface-to-volume ratio, high level of crystallinity, and a Debye length λ D compared to its dimensions [10]. The utilization of nanomaterial based sensors usually leads to faster mass transfer rates, resulting in lower limits of detection and faster analyte detection rates than those reported in conventional sensors [11][12][13].…”