Lanthanum substituted Mg–Ni–Cu–Co ferrite nanoparticles prepared through the Sol-Gel method were studied using different methods such as XRD, FTIR, UV-VIS, SEM, Raman, LCR, EDX and IV to evaluate structural, optical electrical properties. The single-phase cubic spinel structure of samples was confirmed from X-ray diffraction analysis. FT-IR spectra indicated two absorption bands, ?1 ?2 that rep...

In this paper, a new electrochemical sensor was reported for the determination of amaranth in drink soft. sensor, activated carbon-Co3O4 nanocomposite (AC-Co3O4) employ­ed as electrode modifying materials. The introduction high pores to carbon not only can favor more molecules adsorbed surface working through pores, but also may benefit fast electron diffusion electro­chemical detection process...

1. Ion selective microelectrodes were used to measure the distribution of Ca2+ in the cupulae of Xenopus laevis, and to observe the effects of the Ca2+ blocker, La3+, and a Ca2+ chelating agent (EGTA) on the endocupular potential and K+ concentration. 2. Measurements of the endocupular Ca2+ and potential were found to be in the range of 2-30 muM and 55-10 mV respectively, and their relationship...

Constructing nanostructures with desirable morphology and size is a critical issue for pursuing high performance electrode materials. Ultrathin Co3O4 nanosheet arrays, which are composed of well aligned uniform long-range (~5 μm in length) and thin (~10 nm in thickness) nanosheets, with reasonable mass loading on Ni foam are prepared by a two-step hydrothermal reaction. As a supercapacitor elec...

Electrochemical conversion of NO3− to NH3via the nitrate reduction reaction (NO3−RR) is a promising approach for ammonia production and storage “green hydrogen”. Co3O4 has shown satisfactory Faradaic efficiency toward $${\rm{N}}{{\rm{H}}_3}\,({\rm{F}}{{\rm{E}}_{{\rm{N}}{{\rm{H}}_3}}})$$ stability, making it potential electrocatalyst NO3−-to-NH3 conversion. However, high overpotential required t...

A facile synthesis of monodispersed microparticles composed of superparamagnetic Fe(3)O(4) cores, SiO(2) shell, hierarchical γ-AlOOH periphery with Au nanoparticles is reported. These particles are found to be useful for protein immobilization and bear resemblance to daisy flowers, and are hereafter termed "nanoflowers".

This paper presents a sensitive simultaneous detection procedure for Sudan I and bisphenol A based on the multiwalled carbon nanotubes (MWCNTs)/Co3O4 nanocomposite modified screen-printed graphite electrode (SPGE). MWCNTs/Co3O4 was prepared by hydrothermal technique, characterized Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM) X-ray diffrac...

The high-performance, low-cost and simple ultraviolet photodetectors are very promising in some applications. Here, single-crystalline zinc oxide (ZnO) nanoflowers were prepared by combining a facile hydrothermal method with post-annealing treatment, we built an photodetector active area of 0.36 cm2 using the as-prepared ZnO nanoflowers. results showed that under 365 nm light illumination inten...

Novel electrodes are needed for direct ethanol fuel cells with improved quality. Hierarchical engineering can produce catalysts composed of mesocrystals with many exposed active planes and multi-diffused voids. Here we report a simple, one-pot, hydrothermal method for fabricating Co3O4/carbon/substrate electrodes that provides control over the catalyst mesocrystal morphology (i.e., corn tubercl...

Cobalt oxide films were prepared by electrochemically precipitating the hydroxide and heating it in air to form Co3O4. The resulting oxide films behave as a capacitor. The materials were studied emphasizing their use as either positive or negative electrodes in devices. The capacitance of the material was estimated at different heating temperatures and insight was gained into the charge storage...