•Iron-Cobalt codoped ZnO nanoparticles was synthesized by sol–gel method without adding reducing agents.•An additional dopant is indroduced in to single TM dopant to enhance the structural and ...optical property.•Structural characterization was performed by XRD, FTIR, SEM and EDX.•Optical characterization of the prepared samples was performed by UV–Vis spectroscopy.
The (Fe,Co) codoped ZnO nanoparticles were synthesized through PEG assisted route and characterized by XRD,UV visible and SEM with EDAX analysis. The structural analysis shows that the synthesized nanoparticles have crystalline nature and the crystallite size is found to be 49.43 nm. The UV visible spectrum shows that the energy band gap of synthesized nanoparticles was found to be 2.9 eV. The structural morphology was found by SEM analysis and the synthesized sample forms a cluster structure. The presence of Fe, Co and ZnO were confirmed by EDAX analysis. This promotes its utilization in optoelectronic devices.
The rapid growth in industrialization and population leads to generation of large quantity of wastes, some materials were containing high silica contents is damped as a waste. In this study such ...damped silica wastes from various industries is collected and subjected to studies as a stabilizing material for black cotton soils, such assorted materials are Fly ash, GGBS, Rice husk ash, Precipitated silica and Calcium chloride. By effective nanoparticle studies like SEM, EDAX, presence of silica, aluminum and magnesium proportion in each industrial waste is formulated. From the result of nanoparticle analysis novel silica combination prepared by composition of all those materials based on cementanious action mineral presence. In before studies one or two combinations only used as stabilizer but in this paper a new group bearing binder combination is designed and their behavior with chosen geo material and its respective engineering, strength and hydraulic properties is studied by Constantine combination proportion to 20% to weight of soil. Properties such as California bearing ratio (CBR), and North Dakota of the soils were determined with the addition of stabilizers. From the results engineering properties of the poor engineering graded soil were improved is clearly visualized. For the normal soil and effective result binder proportion, a comparison in finite element analysis using PLAXIS is carried out for footing study. Finally, the study showed that exact cementanious mineral combination from industrial waste could improve the geotechnical properties of highly inorganic soil.
EDAX Spectrum of RbCl doped MgO Nanomaterials.
PL spectrum of RbCl doped MgO nanomaterial.
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•Rubidium chloride doped magnesium oxide nanomaterial has been effectively prepared by green ...synthesis for the first time.•The synthesized nanomaterial was characterized by spectral, electron microscopic and antibacterial activity studies.•Crystal structure, particle size and morphology of the sample were analyzed by XRD, TEM, SAED and SEM studies.•Presence of different elements in rubidium chloride doped MgO nanomaterial was confirmed by EDAX method.•The single crystallinity of each nanoparticle in the sample was confirmed by SAED study.
The aim of the research is to look at how to characterise Rubidium chloride (RbCl) doped magnesium oxide (MgO) nanoparticles synthesized from grape juice. Rubidium chloride is an excellent water soluble crystalline rubidium source and it is used as the dopant in this work. Green synthesis is used for the first time to prepare RbCl doped magnesium oxide nanoparticles. Powder XRD, Fourier Transform Infra red (FTIR), EDAX, photoluminescence, SEM, TEM, and antibacterial activity studies were used to evaluate RbCl doped MgO nanoparticles. According to powder XRD measurements, the average particle size was 14.28 nm, which was validated by TEM analysis. The purpose of the FTIR research was to figure out how functional groups are generated in the material. The EDAX studies revealed that the sample contained elements such as Rb, Cl, Mg, and O. Photoluminescence (PL) emission spectrum was recorded and analysed. It is observed that yellow colour emission in PL spectrum is due to presence rubidium as the dopant in MgO nanomaterial. The morphology of the synthesised RbCl doped MgO nanoparticles was confirmed by SEM studies. The zone of inhibition area and antibactierial activity of the prepared sample was also analysed.
Ultrahigh molecular weight polyethylene (UHMWPE) are widely used as a biomaterial for manufacturing of prostheses, implants and other biomedical components with complex geometry and shapes. ...Continuous loading of these components subject to heavy stress and deformation resistance should have enhanced mechanical and chemical properties. This paper aims to improve the mechanical and thermal aspects of the conventional UHMWPE by supplementing reduced Graphene oxide (rGO) in varying weight percentages to develop polymer bio nanocomposite samples. The effect of green synthesized GO nanoparticles in the UHMWPE polymer was investigated for biomedical application. The rGO was distributed in a UHMWPE matrix using a unique and optimized technique to create high-performance nanocomposites. The proposed UHMWPE filled with different loading (0, 0.5, 1.0,1.5, 2.0, and 3.0 wt.%) of rGO was produced by Ultrasonication in an acetone medium. The findings suggest that evenly distributed rGO layers were present throughout the polymer matrix. This, in turn, indicates a good connection between the fillers and matrix by Scanning electron microscopy (SEM) and Energy Dispersive X-Ray Analysis (EDAX), resulting in better composite capabilities. The layers of rGO-aided lamellar arrangements and microfibers between the crystals were observed in the results. The Microhardness of the bio nanocomposite (1 Wt.% rGO/UHMWPE) with 1wt.% rGO in the UHMWPE matrix increased by 2.8% compared to an unfilled polymer. At the same rGO concentration, the bio nanocomposite had a crystallization degree of 46.96%. To achieve optimal performance, rGO content of 1wt.% was added to the sample, which is ideal in many situations where good mechanical and thermal qualities are required during operation. The outcomes reveal that the rGO supplement primarily boosts the thermo-mechanical performances of the modified bio-nano composites for orthopedic products.
Graphical Abstract
•Laterite soil stabilized using a calcium-based additive prepared from biomass silica.•Stabilized laterite exhibited significant strength gain, even with short curing times.•Strength gain attributed ...to formation of calcium aluminate hydrate cementing agents.•Selected stabilizer appears effective for field treatment of tropical laterite soil.
Stabilization of problematic soils for earthwork applications can be performed using a variety of chemical additives, with lime, cement, or fly ash all being traditionally employed for this purpose. More recently, various new calcium-based additives have been actively marketed by a number of companies for soil stabilization applications. The stabilizing mechanisms of these commercially available products are not fully understood, and their proprietary chemical composition makes it difficult to predict their effectiveness. The current study examines the effectiveness of SH-85, a new calcium-based powder additive which is prepared from biomass silica, for stabilization of a tropical residual laterite soil. At the macro-level, changes in soil strength due to additive stabilization were assessed using a series of unconfined compression strength (UCS) tests. The underlying mechanisms that contributed to the stabilization process were explored using spectroscopic and microscopic techniques, including X-ray diffractometry (XRD), energy-dispersive X-ray spectrometry (EDAX), field emission scanning electron microscopy (FESEM), and Fourier transform infrared spectroscopy (FTIR). The UCS test results indicated that the addition of SH-85 powder had a significant stabilizing effect on the laterite soil, with the UCS values increasing fivefold after a 7-day curing period. At the micro-level, addition of SH-85 had a weathering effect on the clay minerals, changing the peak intensities of the observed minerals in the XRD spectrums as the stabilized soil was cured. A significant change in the soil fabric was also observed with curing time in the FESEM tests, with additive stabilization yielding a less porous and denser soil fabric, and changes in the surface appearance of treated clay particles. This research study confirms the potential of SH-85 as an alternative to traditional stabilizers for construction involving tropical residual soils.
In this work, we are interested in studying the effect of the addition of three heterocyclic organic compound derived from imidazole, namely 2-(1,4,5-triphenyl-1H-imidazol-2-yl)phenol (
IM-OH
), ...1,4,5-triphenyl-2-(4-metyoxyphenyl)-1H-imidazole (
IM-OCH
3
), and 3-methoxy-4-(1,4,5-triphenyl-1H-imidazol-2-yl)phenol (
IM-H
) on the corrosion inhibition of mild steel in acidic medium H
2
SO
4
0.5 M. This study was performed using weight loss and electrochemical and theoretical investigations. The obtained results indicate that
IM-OH
,
IM-OCH
3
, and
IM-H
act as excellent inhibitors for mild steel in H
2
SO
4
0.5 M. The results obtained from the electrochemical methods show that IM-OH, IM-OCH
3
, and IM-H imparted high resistance and behave as mixed type inhibitors. Inhibition efficiency (IE %) increases with the increase of inhibitors concentration to attain 97.7%, 98.9%, and 88.9% at 10
−3
M of IM-OH, IM-OCH
3
, and IM-H respectively. EIS data is analyzed to model the inhibition process through appropriate equivalent circuit model. Thermodynamic and kinetic parameters controlling the adsorption process are calculated and discussed. In addition, the surface of the mild steel has been analyzed by the SEM-EDAX. The theoretical results were in good agreement with experimental measurements.
Solution cast technique is employed to prepare solid polymer electrolyte films based on chitosan (host polymer) and silver triflate (AgCF3SO3, doping salt) using (1%) acetic acid as a common solvent. ...The effect of salt concentration on both EP and bulk materials dielectric properties has been analyzed. Physically the original relationship between the bulk dielectric constant and DC conductivity has been interpreted. It is demonstrated that the dielectric constant and dielectric loss values decrease at higher temperatures due to the reduction of silver ions. Scanning electron microscopy (SEM) and energy dispersive analysis of X-ray (EDAX) indicate the presence of metallic silver particles. The ac conductivity spectra shows three distinct regions and obeys the Jonscher's power law at high frequency regions. The temperature dependence of frequency exponent (s) shows the crossover from CBH model to SP model.
•A strong relationship exists between DC conductivity and dielectric constant.•The decrease of ε′ and ε″ is due to the reduction of silver ions (Ag+ → Ago).•The morphological results reveal the formation of silver particles.•The AC conduction models can be applicable for ion conducting polymer electrolytes.
TiO2, a thermally stable, non-flammable and good absorber of UV radiation is useful in various applications such as sensors and solar cells. Potassium Iodide (KI) doped TiO2 film was deposited on ...conductive Fluorine doped Tin Oxide (FTO) glass substrate by spin coating technique. The microstructure and surface morphology of the film was characterized by XRD and FE-SEM. XRD and Raman analysis reveals the film belongs to anatase phase. The morphological properties were investigated by FE-SEM, and the crystallite size was found to be larger, which lowers the band gap energy. The optical properties of the films characterized by UV-Visible spectroscopy shows an enhancement in absorption for KI doped TiO2 film, and band edge was found to appear in the visible region at 437 nm.
In the current research work, we have synthesized and characterized the manganese oxide nanoparticles dispersed in silica via the sol–gel method. The outcomes and phenomenon associated with ...structural morphology are put forward for different applications. Nanocrystalline manganese oxide was annealed at various temperatures as 300℃, 600℃, and 900 °C. The Structural properties of the prepared powder were determined by using X-ray diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR) spectra. Whereas surface morphology was explored through Scanning Electron Microscope (SEM), EDX, etc. The average crystalline size of ∼ 16.5 nm has been obtained using well known Debye-Scherer's formula. After a study of multiphase manganese oxide nanoparticles, the results of optical and catalytic behavior were obtained which give rise to many applications in the optoelectronic industry as well as in the catalytic industry. In the nanometer-size of the prepared powders, the maximum of the active sites lies at the exterior, therefore such materials could be extra efficient catalysts than their micrometer/bulk counterparts. In the present study, the role of crystallite size and surface area is elaborated to explore the industrial-scale application of the prepared multiphase manganese oxide nanoparticles.
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