The drop-dry deposition (DDD) is a simple chemical technique of thin film deposition, which can be applied to metal oxides. solution an aqueous including salt and alkali. However, some ions react spontaneously with water precipitate. This work the first attempt use complexing agents in DDD suppress precipitation. SnO2 films are fabricated using Na2S2O3 as agent via annealing air. results Auger ...

Recently, the research on remediation of aqueous organic pollutants over visible-light-active photocatalysts has got much attention. Therefore, this study reports fabrication Co3O4-Bi2O3 heterojunction photocatalyst for photodegradation rhodamine B dye. The was synthesized by coprecipitation method and characterized XRD, EDS, SEM, TEM, TGA, FTIR. as-prepared utilized as a abatement It observed ...

To fully exploit the superiority of tubular structures, in this study, we systematically explore optimal preparation conditions for Ni/Co3O4, including cation species and content, additive anion species. Our results reveal that formation an initial cobalt nickel acetate hydroxide prism is key factor directly affects final microtubular structure. Moreover, P subsequently doped into Ni/Co3O4 latt...

Three-dimensional (3D) vertically aligned carbon nanotube (CNT) patterns were utilized as templates for fabricating mesoporous hybrid architectures composed of CNTs and various crystalline metal oxide (MO; M = Co, Zn, Mn) nanoparticles by a microwave-assisted chemical approach. Post-synthesis thermal treatment of the CNT/MO patterns culminated in structural reorganization, depending on the trea...

The construction and use of ‘‘dynamic potential–pHdiagrams’’ (DPPDs), that are intended to extend the usefulness of thermodynamic Pourbaix diagrams to include kinetic considerations is described. As an example, DPPDs are presented for the comparison of electrocatalysts for water oxidation, i.e., the oxygen evolution reaction (OER), an important electrochemical reaction because of its key role i...

The identities of photoexcited states in thin-film Co3O4 and the ultrafast carrier relaxation dynamics of Co3O4 are investigated with oxidation-state-specific pump−probe femtosecond core level spectroscopy. A thin-film sample is excited near the 2.8 eV optical absorption peak, and the resulting spectral changes at the 58.9 eV M2,3edge of cobalt are probed in transient absorption with femtosecon...

X-ray photoelectron and absorption spectroscopies (XPS and XAS) combined with on-line mass spectrometry were applied under working catalytic conditions to investigate the methanol oxidation on cobalt. Two cobalt oxidation states (Co3O4 and CoO) were prepared and investigated as regards their influence on the catalytic activity and selectivity. In addition adsorbed species were monitored in the ...

Sphere-like shaped cobalt oxide nanoparticles (Co3O4) were synthesized by a simple wet chemical method using cobalt chloride as precursor and cetyl trimethylammonium bromide (CTAB) as surfactant. Their structural and surface morphologial properties were characterized by high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM) and X-ray diffra...

Among all type of batteries, Lithium Air Batteries (LAB) are considered to be the most effective due their highest energy density around 11900 Wh/kg but there some major issues being faced by LAB such as large overpotential, poor cycle life, low current density, and decreased efficiency. The solution these is primarily dependent on proper selection an electrocatalyst. A new approach for using a...

Films of brucite-type cobalt hydroxide with nanorod morphology and hydrotalcite-type cobalt hydroxide with nanosheet morphology films were fabricated by heterogeneous nucleation in a chemical bath using water and a mixed solution of water–methanol as solvents, respectively. Since oxygen is around 25 times more soluble in methanol than in water, a methanol solution was used to convert a part of ...