A novel room-temperature formaldehyde gas sensor based on walnut-like WO₃ modification on Ni-graphene composites.

ABSTRACT: Ternary composite with great modulation of electron transfers has attracted a lot of attention from the field of high-performance room-temperature (RT) gas sensing. Herein, walnut-like WO₃-Ni-graphene ternary composites were successfully synthesized by the hydrothermal method for formaldehyde (HCHO) sensing at RT. The structural and morphological analyses were carried out by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). SEM and TEM studies confirmed that walnut-like WO₃ nanostructures with an average size of 53 ± 23 nm were functionalized. The Raman and XPS results revealed that, due to the deformation of the O-W-O lattice, surface oxygen vacancies O<

SUBMITTER: Mehmood S 

PROVIDER: S-EPMC9500379 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature