Preparation of CuCrO2 Hollow Nanotubes from an Electrospun Al2O3 Template

Abstract

A hollow nanostructure is attractive and important in different fields of applications, for instance, solar cells, sensors, supercapacitors, electronics, and biomedical, due to their unique structure, large available interior space, low bulk density, and stable physicochemical properties. Hence, the need to prepare hollow nanotubes is more important. In this present study, we have prepared CuCrO2 hollow nanotubes by simple approach. The CuCrO2 hollow nanotubes were prepared by applying electrospun Al2O3 fibers as a template for the first time. Copper chromium ions were dip-coated on the surface of electrospun-derived Al2O3 fibers and annealed at 600 °C in vacuum to form Al2O3-CuCrO2 core-shell nanofibers. The CuCrO2 hollow nanotubes were obtained by removing Al2O3 cores by sulfuric acid wet etching while preserving the rest of original structures. The structures of the CuCrO2-coated Al2O3 core-shell nanofibers and CuCrO2 hollow nanotubes were identified side-by-side by X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. The CuCrO2 hollow nanotubes may find applications in electrochemistry, catalysis, and biomedical application. This hollow nanotube preparation method could be extended to the preparation of other hollow nanotubes, fibers, and spheres.

Electrochemical Detection of Metronidazole by the Fabricated Composites of Orthorhombic Iron Tungsten Oxide Decorated with Carbon Nanofiber Composites Electrode

“…The prepared CNF was collected and stored for a further electrochemical study. [40][41][42] GCE/CNF/Fe 2 WO 6 electrode preparation.-The GCE/CNF/Fe 2 WO 6 electrode was prepared using the following method. The prepared Fe 2 WO 6 (3 mg) was dissolved in DMF (10 ml) and added into the as-prepared CNF (1 mg) with sonicated for 30 min to form CNF/Fe 2 WO 6 composite.…”

Efficient Electrocatalyst for Hydrogen Evolution Reaction based on N-rGO-MWCNT/CuAlO2 Nanocomposite in Acidic Media

“…23,24 Moreover, Cu-based delafossite materials such as CuAlO 2 have good catalytic activity in water splitting. 25,26 Herein, reduced graphene oxide was used as a composite due to its extraordinary physical, chemical, and mechanical properties. 27 Moreover, nitrogen was doped on the reduced graphene oxide to improve the catalytic activity.…”

Solution Synthesis, Processing, and Applications of Semiconducting Nanomaterials

“…While many publications focus on synthesis and applications of solution-based nanomaterials, issues related to processing, e.g., solvent choice, surface compositions and ligands, particle–particle interaction, and deposition methods, are infrequently addressed. This Special Issue includes nine articles and one review, covering synthesis [1], novel processing [2,3,4,5], and a wide range of applications, such as solar cells [1,3,6], sensors [7], catalysis [8], and electronics [9,10].…”

“…This Special Issue includes two articles on CuCrO 2 (CCO). Wu et al [5] made novel Al 2 O 3 -CCO core-shell nanofibers and CCO hollow nanotubes. The CCO was grown on the surface of electrospun Al 2 O 3 fibers by a solution method followed by annealing at 600 °C in a vacuum, resulting in Al 2 O 3 -CCO core-shell nanofibers.…”