Surfactant‐Enhanced Nano Spinel Oxide for Applications in Catalysis, Dye Degradation and Antibacterial Activity

Abstract

Novel surfactant supported MnÀ CoÀ Ni oxide was effectively synthesized by simple and economic co-precipitation method to investigate the efficiency of catalytic reduction of 4-nitrophenol, degradation of methylene blue and antibacterial properties. The optical, structural and chemical compositions were cautiously analyzed by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), X-ray photoelectron microscopy (XPS), ultraviolet-visible (UV-Vis), Fourier transform infrared (FT-IR), Brunauer-Emmett-Teller (BET) and dynamic light scattering (DLS) analyses. XRD analysis showed cubic structure with average crystallite size of 19-21 nm. FESEM images confirmed the combination of spherical, needle, plate and rod like shapes. Accordingly, a high specific surface area of 55.66 m 2 g À 1 was achieved by urea/MnÀ CoÀ Ni oxide. Band gap of ternary metal oxide was found in the range of 3.4-3.6 eV. The XPS analysis confirmed the presence of manganese, cobalt and nickel as major parts with a 2p core level region. The MÀ O bond formation was confirmed by the peak appeared in the range of 500-600 cm À 1 . The negative charge of ternary metal oxide was confirmed by negative zeta potential value. The reduction of 4-nitrophenol was carried out by MnÀ CoÀ Ni oxide with the efficiency of > 99 % and the degradation efficiency against methylene blue was studied. The synthesized catalyst was potent against S. aureus at higher concentration.

Effect of Mo doping in NiO nanoparticles for structural modification and its efficiency for antioxidant, antibacterial applications

“…The NMs, particularly transition metal oxide nanoparticles (NPs), have been known for numerous applications owing to their antioxidant properties performed via two mechanisms: i.e. either by quenching of the radicals via chain breaking processes or by supressing the production of the oxidative radical promoters via chelation processes 15 . Ge et al 16 presented an interesting fact that among both the metal and metal oxide NPs, the metal oxide NPs exhibited better antioxidant potential owing to the involvement of the oxygen atom in their structures.…”

UV-Light-Driven Photocatalytic Dye Degradation and Antibacterial Potentials of Biosynthesized SiO2 Nanoparticles

“…The bacterial interface undergoes dissociation with metal ions, which plays a key role in bacterial inactivation activities. Abundant reports demonstrate the probable mechanism of the antibacterial activity of nanoparticles [89][90][91][92][93][94]. The present work discusses the bacterial inactivation mechanism against the bacterial strain and compares it with the previous literature.…”

Phyto-Mediated Green Synthesis of Silver Nanoparticles Using an Aqueous Leaf Extract of Momordica cymbalaria: Antioxidant, Cytotoxic, Antibacterial, and Photocatalytic Properties

“…The photodegradation of methylene blue dye solution was investigated under sunlight in a batch reactor system, utilizing the synthesized Mc-AgNPs as the catalyst [63]. An open-type rectangular tray measuring 16 × 15 × 5 cm and made of borosilicate glass was employed as a reactor to sustain the dye solution in sunlight-mediated photocatalysis.…”