The surface-enhanced Raman spectroscopy (SERS) technique is of great importance for insight into the transient reaction intermediates and mechanistic pathways involved in heterogeneously catalyzed chemical reactions under actual reaction conditions, especially in water. Herein, we demonstrate a facile method for in situ synthesis of nanocrystalline magnesium oxide-Ag(0) (nano MgO-Ag(0)) hybrid ...

Ag and Ag@MgO core-shell nanoparticles (NPs) with a diameter of d = 3-10 nm were obtained by physical synthesis methods and deposited on Si with its native ultrathin oxide layer SiO x (Si/SiO x ). Scanning electron microscopy and transmission electron microscopy (TEM) images of bare Ag NPs revealed the presence of small NP aggregates caused by diffusion on the surface and agglomeration. Atomic ...

objective(s): our previous studies have shown that mgo nanoparticles (mgo nps) could improve anxiety and reduce pain in animals. in this study, the effect of co administration mgo nps and vitamin c on anxiety like behavior and nociception in postpartum depression (ppd) model were investigated.materials and methods:  female mice (27 ± 3 g) were divided into groups: two control groups, ppd groups...

MgO nanopartticels (NP-MgO) in average size between 30—130 nm were prepared by sonochemistry method. Some phenols have been converted to ortho-hydroxybezaldehyd by ortho-formylation using MgO nanoparticles and (CH2O)n in xylene and subsequently treated with aqueous NH2OH.HCl, affording the corresponding aldoxime in a one-pot procedure. Moreover, this one-pot process, with two transformations, o...

Introduction Bulk gold is a chemically inert metal, and had previously been disregarded as a candidate for catalytic applications [1]. Haruta’s pioneering work [2] showed exceptional reactivity on gold nanoparticles of 2-5 nm in diameter. Among reactions, the low temperature CO oxidation [3] on Au has created a strong interest. Model catalyst samples, which consist of planar metal oxide surface...

In the present study, magnesium oxide (MgO) and chloride (MgCl) nanoparticles were phytosynthesized. Selected parameters like leaf extracts from Moringa oleifera, Vernonia amygadalina Occimum gratissimum, time of reaction, precursor salts at varying concentrations, plant to volume ratio, pH medium light sources optimized for a better production nanoparticles. The phytosynthesized MgO MgCl chara...

a facile and simple method was proposed to control the size and shape of the mgo nano structures with high surface area in the presence of efficient and cheap templates like peg 200, peg 600, peg 4000 and sorbitol at low temperature within a little time. nano rods and nanoparticles have been achieved by applying these templates and altering other growth parameters. the products were characteriz...

Oxide nanoparticles can exhibit unique physical and chemical properties due to their limited size and a high density of corner or edge surface sites. In this study, MgO nanoparticle was synthesized using Mg(CH3COO)2 and hexamethylenetetramine as starting materials. The structure and optical properties of these particles are investigated by using X-ray diffraction (XRD), sc...

Thermal treatment of MgO-loaded Ir nanoparticles or Ir(OAc)3 formed Ir–MgO solid solutions. The valence in the solution was 3 +, as evidenced by L3-edge XANES combined with XPS analysis. A slight contraction Ir–O bond distance observed compared to that nearest neighboring Mg–O MgO. dispersion exhibited a two-spike pattern depending on temperature owing formation and successive segregation

In this research, different amounts of nano-MgO were added to normal concrete samples, and the effect these particles on durability samples under freeze thaw conditions was investigated. The compressive tensile strength as well permeability containing nanoparticles measured compared those plain (without nanoparticles). age percentage nanoparticles, water-to-binder ratio are variables current re...