Preparation, Characterization, and Electrochemical Performance of the Hematite/Oxidized Multi-Walled Carbon Nanotubes Nanocomposite

Abstract

In this research work, a hematite (α-Fe2O3) nanoparticle was prepared and then mixed with oxidized multi-walled carbon nanotubes (O-MWCNT) to form a stable suspension of an α-Fe2O3/O-MWCNTs nanocomposite. Different characterization techniques were used to explore the chemical and physical properties of the α-Fe2O3/O-MWCNTs nanocomposite, including XRD, FT-IR, UV-Vis, and SEM. The results revealed the successful formation of the α-Fe2O3 nanoparticles, and the oxidation of the MWCNT, as well as the formation of stable α-Fe2O3/O-MWCNTs nanocomposite. The electrochemical behaviour of the α-Fe2O3/O-MWCNTs nanocomposite was investigated using cyclic voltammetry (CV) and linear sweep voltammetry (LSV), and the results revealed that modification of α-Fe2O3 nanoparticles with O-MWCNTs greatly enhanced electrochemical performance and capacitive behaviour, as well as cycling stability.

Photoelectrochemical water splitting by hematite boosted in a heterojunction with B-doped g-C3N4 nanosheets and carbon nanotubes

“…This observation is consistent with literature ndings, reinforcing the stability of hematite's electronic structure under the inuence of these additives. [67][68][69] The N 1s peak at 397.5 eV belongs to the N-B species and the peak at 398.0 eV is attributed to sp 2 nitrogen, specically the C-N]C bond of graphitic carbon nitride. 70,71 Additionally, the peak at 400.1 eV is assigned to the sum of this adventitious nitrogen and the N-C3 component of the graphitic carbon nitride in B-C 3 N 4 containing samples.…”