Article: Three-Dimensional Coral-Like NiFe-Layered Double Hydroxides on Biomass-Derived Nitrogen-Doped Carbonized Wood as a Sensitive Probe for Nonenzymatic Urea Determination
ACS sustainable chemistry & engineering. 2022 May 17, v. 10, no. 21
2022
Abstract: Binder-less, self-standing, disposable, and cost-effective sensing probes are crucial for the development of next-generation nonenzymatic urea sensors (NEUSs). In the present study, three-dimensional (3D) coral-like NiFe-based layered double hydroxide ( ... ...
| Abstract | Binder-less, self-standing, disposable, and cost-effective sensing probes are crucial for the development of next-generation nonenzymatic urea sensors (NEUSs). In the present study, three-dimensional (3D) coral-like NiFe-based layered double hydroxide (NF-LDH) microstructures were grown over the naturally inherited porous microchannels of nitrogen-doped carbonized wood (NCW). The microstructural details and chemical composition of the fabricated electrodes were examined by microscopic and spectral methods. The formation of novel 3D coral-like microarchitectures with uniformly enveloped nanoflakes was evidenced from the scanning electron microscopy measurements. Interestingly, NF-LDH exhibited a voltammetric response for urea due to the unique 3D architecture and synergistic influence between catalytically active Ni³⁺ sites and doped Fe³⁺ centers. Here, NCW serves as a catalyst-docking platform and electron-conducting medium. Such direct anchoring of catalytically active structures on conductive scaffolds eliminates the electron transfer resistance provoked by stereotypical insulating binders. Furthermore, the growth of the NF-LDH catalyst on NCW was varied with respect to the mole ratio of Ni³⁺ and Fe³⁺. Among the different mole ratios, the NF-LDH catalyst modified with Ni/Fe-0.75:0.25 showed the best sensing performance toward urea with a sensitivity of 53 μA mM–¹ cm–², a wide linear range from 0.5 to 8 mM, and a limit of detection of 0.114 mM (S/N = 3) in addition to exceptional stability and reproducibility. |
|---|---|
| Keywords | catalysts ; chemical composition ; cost effectiveness ; detection limit ; electron transfer ; green chemistry ; urea ; voltammetry ; wood |
| Language | English |
| Dates of publication | 2022-0517 |
| Size | p. 6952-6962. |
| Publishing place | American Chemical Society |
| Document type | Article |
| ISSN | 2168-0485 |
| DOI | 10.1021/acssuschemeng.1c08635 |
| Database | NAL-Catalogue (AGRICOLA) |
More links
Kategorien
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.
Inter-library loan at ZB MED
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.