Nitrogen-doped carbon nanotubes decorated with Co and Ni metal nanoparticles were assessed as counter electrodes (CEs) of dye-sensitized solar cells (DSSCs). These composites show good electrocatalytic activity toward the counter electrode reduction reaction (I3(-)→ I(-)) in DSSCs. The resulting devices using these composites as CEs display photovoltaic performance as good as, or even better th...

in comparison to the previous researches, zro2 nanoparticles with higher surface area (85 m2/g) have been synthesized in this research. the as-prepared zro2 nanoparticles by co-precipitation method were characterized with x-ray diffraction (xrd), scanning electron microscopy (sem) and transmission electron microscopy (tem). the surface area of the sample was characterized by bet method. the eff...

In this work, we report the room temperature ferromagnetism in Sn1‐xFexO2 and Sn1‐xNixO2 (x = 0.00, 0.03 and 0.05) nano‐crystalline powders. All the samples were prepared using co‐precipitation method. X‐Ray Diffraction (XRD), transmission electron microscopy (TEM), energy dispersive x‐ray analysis (EDAX), UV‐ visible absorption spectroscopy and room temperature magnetiz...

Samples of CoFe2-xCrxO4 where x varies from 0.0 to 0.5 were prepared by co-precipitation route. These samples were sintered at 750°C for 2 hours. These particles were characterized by X-ray diffraction (XRD) at room temperature. The FCC spinel structure was confirmed by XRD patterns of the samples. The crystallite sizes of these particles were calculated from the most intense peak by Scherrer f...

The surface of lanthanide(III)-doped LaPO4 nanoparticles was modified by reaction with an alcohol, leading to a covalent bond between the ligand and the particle surface. The surface of lanthanide(III)-doped LaF3 nanoparticles was modified to alter the solubility of the nanoparticles and study the influence of surface effects on the luminescence of lanthanide ions doped in the nanoparticles. Th...

Back cover image: Carbon-based composite electrocatalysts doped with transition metals and heteroatoms are expected to replace noble metal-based catalysts as high-efficiency for OER ORR. In the article number 10.1002/cey2.317, Zhang et al. prepare an ultralong N,S co-doped carbon nano-hollow-sphere chain encapsulated Co nanoparticles, analyze its growth mechanism catalytic activity ORR/OER, pro...

Abstract The band-gap energy of TiO2 nanoparticles has been modified using different methods. study reviewed the effects doping and co-doing nanotubes with metals nonmetals to modify its band gap improves photocatalytic activity nanoparticles. From our findings reviewing articles, dissimilar metal ions like Cerium (Ce) together nitrogen (N) or chromium (Cr) iron (Fe) will decrease particle size...

in this study, undoped zno and doped with fe and mn nanostructures were synthesized by hydrothermal method. the morphology of nanostructures was characterized by scanning electron microscope. the electrochemical response of the carbon paste electrode modified with nanoparticles of zno and also zno doped with fe and mn toward levodopa (l-dopa) was studied. studies of cyclic voltammetry using pro...

Rare earth metal doped silica nanoparticles have significant advantages over traditional organic dyes and quantum dots. Silsesquioxanes are promising precursors in the production of silica nanoparticles by thermolysis, due to their structural similarities with silica materials. This manuscript describes the production of a new Eu3+-based metallasilsesquioxane species and its use as a single sou...

Calculations of the magnetocrystalline anisotropy are used to evaluate prospects for new lanthanide-free permanent magnets. Based on the requirement of transition-metal-rich phases, we investigate interstitial impurities in tetragonally distorted bcc Fe and sub stitutional impurities in hcp Co, and compare doped bulk materials with nanostructures, especially with elemental 3d and YCo5 nanoparti...