Mercury is a specific concern worldwide because of its high toxicity. Exposure to mercury, even at very low concentrations, induces digestive, brain, kidney, neurological and endocrine system diseases. In this work, Fe2O3 nanoparticles were synthesized via one step solution combustion synthesis using glycine as a fuel. The structural features of the as formed Fe2O3 nanoparticles were characterized

The primary objective in this work was to characterize the microstructure, metallurgical reactions, and mechanical properties of joints between oxygen-free Al2O3 ceramic and pure Cu substrates following diffusion bonding at temperatures of 250, 300, or 350°C using a metallization interlayer of Ti-0.8La (wt.%). Diffusion bonding of oxygen-free Al2O3 ceramic and pure Cu substrates was performed using

In the present context, sunlight-irradiation based synthesis of silver nanoparticles (AgNPs) was performed using bacterial xylanase as reductant (Xyl-AgNPs) and evaluated its potency towards the clarification of three fruits [Mangifera indica (mango), Punica granatum (pomegranate), and Ananas comosus (pineapple)] juices. Initially, the synthesis of Xyl-AgNPs was confirmed by the reduction of silver

It is a big challenge to prevent the degradation of magnetic nanoparticles particularly under acid conditions. Here we demonstrated that the stability of magnetic Fe3O4 nanoparticles could be substantially improved after double coating with silica and carbon. The dense silica shell and hydrophobic porous carbon shell endowed the magnetic Fe3O4@SiO2@C nanoparticles remarkable anti-corrosion performance

Strontium titanate based materials are promising candidates for fabrication of oxygen sensors. As a dense diffusion barrier layer of limiting current oxygen sensor, strontium titanate based materials should be able to control the diffusion rate of oxygen ions or accelerate the formation of limiting current. Based on this key question, indium oxide was introduced to strontium titanate based materials

This article explored the adsorption of the cationic malachite green (MG) dye and phenol, on hematite iron oxide nanoparticles (α-Fe2O3).The characterization of Fe2O3 was evaluated by specific surface measurements of Brunauer Emmett-Teller (BET) and by Fourier transform infrared spectroscopy (IFTR).The results collected on the kinetics adsorption of malachite green show that the adsorption followed

This paper examines the mechanical, abrasive and erosive wear properties of a thermal spray enhanced with randomly dispersed solid lubricants. Two different solid lubricants including graphite and polytetrafluoroethylene (PTFE) were mixed with a NiAl2O3 thermal spray to develop a stable thermal coating. The solid lubricants increased the wear resistance of the coating upon the erosion of the spray

In this study, CuO thin films are grown by spin coating method as a function of La doping on n-Si substrates. The morphological properties of thin films have been analyzed by AFM images, and it has been observed that the roughness of thin films have been decreased with increasing La dopant concentration. The surface topography and chemical composition of thin films have been studied by scanning electron

The progressed thermal features nano-materials with utilization of activation energy, thermal radiation and applied magnetic force allow an improved heat and mass transfer performance in various era of engineering, industries and technological processes. The energy production with cheap resources plays a renewable role in the countries industrial growth. This task has been effectively achieved with

In this paper, silver sulfide (Ag2S) nanostructure film was prepared by chemical bath deposition (CBD) technique at different deposition times. The effect of deposition on the structural, optical and electrical properties of the Ag2S film is studied using x-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive x-ray (EDX), transmission electron microscope (TEM), and UV-Vis spectroscopy

In this paper, an easy one-step hydrothermal method was reported to preparation of unique hierarchical porous CuS doped with vanadium (V-CuS) nanosheets with micro skein overall morphology. The fabricated V-CuS micro skein was casted on the surface of glassy carbon (GC) electrode and was used as an efficient electrocatalyst for glucose in alkaline solutions. As a amperometric glucose sensor, this proposed

As a promising candidate for renewable-energy, organic thermoelectric (TE) materials have received tremendous research interests because of their ability to satisfy the urgent demands of mitigating the energy crisis. Polypyrrole (PPy), as one of the most significant organic conducting polymers, is applied widely in actuators, solid electrolytic capacitors, and so on. PPy was synthesized as free-standing

Divalent ion batteries are potential substitutes to existing rechargeable batteries because of the high-energy density, safety, and low cost. However, the applications of divalent batteries are strongly dependent on the availability of efficient electrode materials. We herein report the adsorption and migration mechanism of divalent ions like Mg+2 and Ca+2, on two-dimensional carbon nitride monolayer

Co3O4-MoS2 nanocomposites (NCs) were deposited on titanium sheets at room temperature using a vacuum kinetic spray process and Co3O4 and MoS2 micro powders. Co3O4-MoS2 NCs/Ti electrodes were used as electrocatalysts for non-enzymatic detection of H2O2 in 0.1 M NaOH. X-ray photoelectron spectroscopy revealed an improvement in the synergy between various cobalt-based active sites and MoS2 species in

Role of alloying of lead in hot dip galvanized coating deposited on mild steel wire on their corrosion characteristics are studied exposing them in industrial, coastal urban environments and laboratory simulated electrolytes. Various corrosion evaluation techniques namely mass loss, electrochemical impedance spectroscopy and direct current polarization methods are used to assess corrosion characteristics

The present research was designed to explore the adsorption of sunset yellow (SY) and Nile blue (NB) from water using clay and clay/starch/MnFe2O4 magnetic composite. The magnetic composite was synthesized by chemical precipitation and the physical-chemical characteristics of the adsorbents were evaluated. The specific magnetic saturation values for MnFe2O4 nanoparticles and clay/starch/MnFe2O4 were

Semiconductor metal oxides are under investigation in recent years towards biological applications due to their high stability. Especially CuO nanoparticles have gained attention due to their low cost and easy synthesis. Herein, the effect of calcinations temperature on the CuO nanospindles prepared by reflux method were investigated. The XRD results reveal a monoclinic structured CuO formation. The

This work highlights some physical investigations on NiFe2O4/ α- Fe2O3 composite deposited on glass substrates as thin films at T = 460 °C by the spray pyrolysis technique. First, X-ray diffraction analysis approved the polycrystalline nature of such films with a mixture of NiFe2O4 and α- Fe2O3 materials. The majority phase based on NiFe2O4 compound indicated the achievement of a cubic structure and

We model bilayer graphene-like materials with Si2C14 and BC14N stoichiometry, where the interlayer interactions play important roles shaping the physical properties of the systems. We find the interlayer interaction in Si2C14 to be repulsive due to the interaction of Si-Si atoms, and in BC14N it is attractive due to B and N atoms. The repulsive interlayer interaction opens up a bandgap in Si2C14 while

In this study, activated carbon/chitosan/Carica papaya seeds (CHASPAC) composite was prepared by coating chitosan (CH) with activated carbon (AC) and Carica papaya seeds (ASP). The composite was characterized by IRFT, XRD, ATD/DTG and SEM, and then used as adsorbent for methylene blue (MB). Kinetic studies revealed that the pseudo-second-order and Elovich models were better described the adsorption

In the present work, a novel system of Cu2AlNiZnAg high entropy alloys (HEAs) powder was successfully synthesized and Cu-Cu2AlNiZnAg/diamond coatings were fabricated on T2 pure Cu substrate via mechanical alloying method. Characterization of the Cu2AlNiZnAg HEA powder indicated that a single FCC solid solution phase was formed and no indication of any amorphous phase or intermetallic compound was found

Super-hydrophobic tin oxide surfaces were fabricated and the anti-icing potential was investigated. The main purpose of the study was the examination of the seed-layer effect on the wettability of the prepared surfaces. The seeding was performed on Al-substrates by dip coating and consequently the common chemical bath deposition method was used for tin oxide deposition. Seed-layers were deposited under

The dynamic modulation of contact angle on switchable hydrophilic-hydrophobic surfaces is one of the important factors in designing miniaturized optical devices. A spreading and retention of a nano water droplet placed on an insulator surface covering two planar electrode layers and perpendicularly in contact with a conductive tip is studied using atomistic molecular simulation. The change in the droplet

The aim of this study was to find suitable fire retardants to increase the fire resistance of Scots pine, poplar, and date palm trees. The fire retardants used in this study were disodium-tetra borate (Na2B4O7) (Borax), disodium-hydrogen phosphate (Na2HPO4) (DSHP), diammonium-hydrogen phosphate ((NH2)4HPO4) (DAHP), and polyethylene glycol 400 (PEG 400). The fire retardants were prepared in different

In this study, plasma electrolytic oxidation (PEO) composite coating on AZ31B magnesium alloy was performed in the suspension of glass particles (particle size of 500 nm). The effect of glass particle concentration on corrosion and wear behavior of coatings were investigated by potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and pin on disk tests. The results showed

Since the excellent tribological performance of polyhydric alcohols was reported under low loads, several polyhydric alcohols, such as glycerol, draw more attentions and was further investigated. However, the lubricity under high loads and fast rotational speed was rarely reported until now. In our previous work (Zhang R. et al, (2020) Applied Surface Science, 510, 145456) [1], graphene was formed

To prepare cohesive polymeric composite, plasma-modified carbon fibers (CF) were prepared. Among the different strategies to modify the CF surface, the plasma functionalization, a promising eco-process, induces both chemical and topographic modifications of the CF surface. Surface characterization of such material composed of several thousands of single strands requires specific analyzes well suited

The present work describes the deposition and investigation of structural and optical characteristics of bare and doped TiO2 thin films. The TiO2 products are obtained through simple and cost effective spray pyrolysis technique (SPT) using titanium (IV) butoxide as Ti precursor. The impact of Zn doping on the crystal structure and phase formation is studied by X-ray diffraction (XRD) analysis. The

The electrochemical behavior of single-layer CrN and nanostructured multilayer ZrN/CrN coatings, deposited on AISI 304 by arc-physical vapor deposition (Arc-PVD) process, was investigated in 3.5 wt.% NaCl solution using impedance and polarization measurements. The microstructure of both coatings were analyzed using a field emission scanning electron microscope. The polarization measurements showed

Ni-P electroless coatings are widely applied for protection of magnesium alloys and other materials due to the low energy consumption of the process and high resistance to corrosion and wear, properties that can be improved with the incorporation of particulate materials. Despite the attractive combination of properties of electroless coatings, studies in the tribocorrosion field, such as fretting-corrosion

Organophosphonic acid surface modification is performed to alter the surface properties of titania or other ceramics. By changing the modification conditions the physicochemical properties of the surface can be controlled. While these changes have been studied on the macroscale for different functional groups, showing differences in sorption behavior and application, their local impact on the surface

Decorating ZnO with nanosheets of MoS2—a transition metal dichalcogenide characterized by a relatively narrow band gap—is a promising way to increase the photocatalytic activity of ZnO. However, limited studies report the effect of the layer number of of MoS2 nanosheets on the photocatalytic performance of ZnO/MoS2. In this work, ZnO nanorods were decorated with multilayer and few-layer (∼11 and ∼3

Atmospheric pressure plasma (APP) is an emerging technology for surface modification and depositing plasma coating without a vacuum chamber in ambient air to improve corrosion protection and paint adhesion for aerospace and energy applications. Current atmospheric plasma-based platforms lack the ability to control the surface chemistry of the coating for diverse operating environments. Here, we develop

The objective of the present work is focused towards the reduction of wear in industrial applications. This can be overcome by applying layers of the protective coatings on the surface of the substrate, thereby improving surface properties. Here in the present work three powders WC-12%Co, NiCrBSi, Cr3C2–25wt%NiCr are taken, from which three types of blended powders are prepared taking in proper wt%

Although several techniques have been utilized to alter micro/nanotopographies of implant surfaces to improve the osseointegration rate, it has been challenging to fabricate micro/nano directional textures of desired shape size and accuracy. In the present study, mechanical micro-milling is utilized to create orderly conical dimple textures on the Ti6Al4V surface. The surface characterization, 3D surface

The NO2 gas is one of the by- products of incineration processes that is the main source of the atmospheric pollutants, So the removal of NO2 is essential for reducing the environmental contamination. In this study, the oxidation of NO2 and producing nitric acid by Mn based on LECA, (Mn/LECA), as a novel nanocatalyst was investigated in aqueous solution. The progress of the treatment reaction in a

As a new class of materials, High Entropy Alloys (HEAs), have been recently used for various usages such as high-temperature applications. High entropy alloys have such unique properties as high strength, high-temperature phase stability, good fracture resistance, and excellent softening resistance at high temperatures. Studies on the oxidation behavior of as-cast high entropy alloys are, however,

Surface modification of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) film was performed using chemical vapor texturing process of HNO3 vapor. Textured PEDOT:PSS film exhibits higher root-mean-square roughness of 14.43 nm than pristine PEDOT:PSS film of 11.87 nm with small decrease in thickness. Moreover, approximate one-half reduction of sheet resistance is measured. In correspondence

According to the PEO coatings remarkable properties, this surface process is extensively used in order to modify the surface and improve the properties of valve metals and their alloys. However, few articles about PEO treatment on niobium have been published. This study reviews effects of electrolyte composition and different voltages on the surface behaviors of formed PEO coatings on niobium. The

The presence of free fatty acid (FFA) in waste vegetable oil (WVO) is undesired and must be removed. The present study synthesized amine imprinted manganese ferrite (MnFe2O4-DEA) via coprecipitation method and used it for the removal of FFA in WVO. Fourier transformed Infrared spectroscopy (FTIR) and X-ray diffraction (XRD) results confirmed the formation of MnFe2O4-DEA and further analysis by Brunauer-Emmett-Teller

Nickel vanadium oxide (NiV2O6) nanoparticles have been successfully prepared via hydrothermal and solvothermal methods using ammonium metavandate and nickel nitrate as precursors. The variations in the solvents used and the concentrations of the precursors produce immense change in the properties of the material. The characterization results revealed that the changes in structure, morphology, energy

Improvement of corrosion resistance is one of the main goals in developing plasma electrolytic oxidation (PEO) ceramic coatings on AZ31 magnesium alloys. In this study, ceramic coatings were deposited on AZ31 magnesium alloys by PEO technique in electrolytes containing 10 g/l sodium phosphate (Na3PO4) and 1.5 g/l sodium hydroxide (NaOH) at different concentrations of ZnO nanoparticles and current density

The structure of alpha + beta-titanium alloy, its microhardness, surface roughness, and wear and corrosion resistance after anode plasma electrolytic borocarburising (PEB/C) in electrolyte containing boric acid, glycerol and ammonium chloride were investigated. An X-ray diffractometer and scanning electron microscopy were used to characterize the phase composition and structure of the modified surface

Magnesium-cobalt molybdate composites (Mg1–xCoxMoO4: x = 0, 0.3, 0.4, 0.6, 0.8 and 1) were successfully synthesized through a facile sol-gel synthesis at low temperature, and characterized by thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), UV-Vis spectroscopy