Barium Carbonate Nanoparticles Research Articles

Enhanced performance of Sr2Fe1.5Mo0.5O6-δ electrode by infiltrating dual functional barium carbonate nanoparticles in symmetrical SOFCs

Enhanced performance of Sr2Fe1.5Mo0.5O6-δ electrode by infiltrating dual functional barium carbonate nanoparticles in symmetrical SOFCs

Enhanced electrode reaction for La0.8Sr0.2FeO3-δ-Sm0.2Ce0.8O1.9 composite cathode by barium carbonate nanoparticles as a synergistic catalyst

Enhanced electrode reaction for La0.8Sr0.2FeO3-δ-Sm0.2Ce0.8O1.9 composite cathode by barium carbonate nanoparticles as a synergistic catalyst

Characterization and luminescence properties of Eu3+ doped BaCO3 nanoparticles synthesized by autocombustion method

Nanostructured powders of undoped and europium (Eu3+) doped barium carbonate (BaCO3) were prepared by the autocombustion method. We investigated the influence of Eu3+ doping on the optical properties of barium carbonate. The samples nanostructures were characterized by X-ray powder diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), thermogravimetric analysis (TGA) and differential thermal analysis (DTA) and photoluminescence (PL). The results obtained by XRD revealed that the samples consist of the BaCO3 phase with orthorhombic structure having the space group Pmcn, retaining this crystalline phase after doping with Eu3+. These products were found for undoped and BaCO3: Eu3+ nanoparticles with 56–71 nm and 49–60 nm ranges, respectively. SEM reveals that the barium carbonate nanoparticles had a spherical morphology. Symmetric stretches, asymmetric stretches, and in plane bending vibrations, and out of plane of CO32− complexes have detected. The photoluminescence of the obtained BaCO3:Eu3+ were studied. The CIE co-ordinates for the Eu3+ doped BaCO3 were x = 0.580 and y = 0.330. From the CIE chromaticity diagram for the emissions of Eu3+ doped BaCO3. The material has such color purity and reaches 76%. Thus, having color tenability and has been considerate as a candidate of the laser emission.

Sustainability of the crystallographic phase stability of the barium carbonate nanoparticles at dynamic shocked conditions

Sustainability of the crystallographic phase stability of the barium carbonate nanoparticles at dynamic shocked conditions

Leishmanicidal activities of biosynthesized BaCO3 (witherite) nanoparticles and their biocompatibility with macrophages.

The aim of this study was cost-effective and greener synthesis of barium carbonate (BaCO3 or witherite) nanoparticles with economic importance, and to evaluate their therapeutic potentials and biocompatibility with immune cells. Barium carbonate nanoparticles were biosynthesized using black elderberry extract in one step with non-toxic precursors and simple laboratory conditions; their morphologies and specific structures were analyzed using field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FESEM-EDX). The therapeutic capabilities of these nanoparticles on the immune cells of murine macrophages J774 and promastigotes Leishmania tropica were evaluated. BaCO3 nanoparticles with IC50 = 46.6µg/mL were more effective than negative control and glucantium (positive control) in reducing promastigotes (P < 0.01). Additionally, these nanoparticles with a high value of cytotoxicity concentration 50% (CC50) were less toxic to macrophage cells than glucantime; however, they were significantly different at high concentrations compared to the negative control.

Barium carbonate nanostructures: Biosynthesis and their biomedical applications

In recent years, nanostructures and nanoarchitectures have attracted much attention in the development of biomedicine and nanomedicine. The plant-mediated synthesis of barium carbonate nanoparticles (BACN) has been performed using barium chloride and aqueous extract of natural sweetener (Stevia). In this study, the biosynthesis of BACN has been selected due to the useful medicinal potentials and suitable obtained biocompatibility of produced nanoparticles as well as its simplicity, lesser production steps, and cost-effectiveness. Barium carbonate nanostructures were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscope. The toxicity of BACN on U87 brain cancer cells was evaluated based on MTT assay. According to the results, the prepared nanostructures can be employed for biomedical applications, especially cancer therapy.

Influence of nature of surfactant and precursor salt anion on the microwave assisted synthesis of barium carbonate nanoparticles

Barium carbonate nanoparticles of rod and bean shaped morphologies were synthesized by microwave irradiation technique and the influence of the surfactants cetyl trimethyl ammonium bromide (CTAB), sodium dodecyl sulphate (SDS) and Tween 80 having different co-anions were studied on the morphology and size of the as-prepared nanoparticles. The nanoparticles were characterized by X-ray powder diffraction (XRD) technique, field-emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), Fourier transform infrared spectrometry (FTIR), and thermogravimetric analysis (TGA). The transmission electron microscopy (TEM) of the BaCO3 nanoparticles showed that different interesting images such as rod-like, flower-like, bean-like and peanut-like are formed when SDS was used with different barium salts. The purity of prepared product was confirmed by energy dispersive X-ray spectroscopy (EDS). Thermogravimetric analysis (TGA) was done to determine the thermal behavior of the as-prepared BaCO3 nanoparticles.

Green chemistry approach: Synthesis, morphological and thermal studies of nanocomposites of barium carbonate nanoparticles

Green chemistry approach: Synthesis, morphological and thermal studies of nanocomposites of barium carbonate nanoparticles

Synthesis and Characterization of Yttrium Oxide, Copper Oxide and Barium Carbonate Nanoparticles Using Azadirachta Indica (the Neem Tree) Fruit Aqueous Extract

Green chemistry was used to prepare yttrium oxide (Y2O3), barium carbonate (BaCO3), and copper oxide (CuO) nano-particles (NPs) using aqueous Neem fruit extract Azadirachta indica as a capping agent. The resulted metal complexs were calcined at temperature of 650-900oC. The produced NPs were characterized using X-ray Powder Diffraction (XRD), Scanning and Transmission Electron Microscope (STEM), Fourier transform infrared spectroscopy (FTIR), UV-Vis Spectroscopy and Thermal Gravimetric Analysis (TGA). XRD analysis confirmed the monoclinic structure for CuO NPs, orthorhombic structure for BaCO3 NPs and cubic structures for Y2O3 NPs. XRD data for the three metal oxides were matched with the ICDD standards. The crystallite size for the CuO, BaCO3 and Y2O3 NPs were 29.9, 49.0 and 10.3 nm, respectively. UV-vis spectroscopy showed that lambda max for the scanned suspended oxides were in the UV range which is an indication of the formation of nano-sized materials. STEM results showed agglomerated NPs with an average particle size of < 50 nm for all oxide samples. FTIR results confirmed that the metal-oxide bond existed and represented by bands in the range 500-700 nm-1.

Effect of Infiltration of Barium Carbonate Nanoparticles on the Electrochemical Performance of La0.6Sr0.4Co0.2Fe0.8O3−δ Cathodes for Protonic Ceramic Fuel Cells

BaCO3 nanoparticles were infiltrated into a La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) electrode as a synergistic catalyst to enhance the performance of proton conducting solid oxide fuel cells (H-SOFCs). Electrochemical impedance analysis showed that the polarization resistance was dramatically reduced by nearly 75% from 1.123 Ω cm2 to 0.293 Ω cm2 at 700°C after infiltration of BaCO3 nanoparticles. The chemical stability between the BaCO3 and LSCF electrode was investigated by running a long-term 300-h test, during which the polarization resistance exhibited only minor degradation (2.22–2.20 Ω cm2). In addition, single cells with infiltrated LSCF electrode and BaCe0.7Zr0.1Y0.1Yb0.1O3−δ (BCZYYb) electrolyte yielded a maximum power density of 404 mW cm−2 at 700°C, much higher than cells with a bare LSCF electrode (268 mW cm−2 at 700°C). BaCO3 demonstrated promising performance enhancements of LSCF electrodes for H-SOFCs and warrants further development.

Selective Fabrication of Barium Carbonate Nanoparticles in the Lumen of Halloysite Nanotubes

Barium carbonate (BaCO3) materials with the controllable morphology of nanoparticles were selectively loaded into the lumen halloysite nanotubes (abbreviated as Hal) by a urease assisted catalytic implementation strategy. The Hal mineral was pre-treated through leaching by hydrochloric acid (abbreviated as A-Hal), resulting in increased defect sites and zeta potential. The negatively charged urease was loaded inside the positively charged A-Hal lumen, and then through the decomposition of urea catalyzed by urease to produce carbonate ions and ammonia. When Ba2+ diffused in, BaCO3 particles were selectively synthesized in the lumen of A-Hal, the pore channels of A-Hal effectively controlled the growth and aggregation of BaCO3 nanocrystals and their geometrical morphology. The obtained BaCO3/A-Hal-T was characterized by transmission electron microscopy, Fourier transformation infrared spectroscopy and X-ray diffraction, differential scanning calorimetry-thermogravimetry (DSC-TG). The BaCO3/A-Hal-T may provide a candidate for potential applications.

In vitro anticancer potential of BaCO3 nanoparticles synthesized via green route

Green synthesis of nanoparticles is a growing research area because of their potential applications in nanomedicine. Barium carbonate nanoparticles (BaCO3 NPs) were synthesized using an aqueous extract of Mangifera indica seed as a reducing agent. These particles were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Transmission electron microscopy (TEM), selected area electron diffraction (SAED), Energy-dispersive-X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) analysis. HR-TEM images are confirmed that green synthesized BaCO3 NPs have spherical, triangular and uneven shapes. EDX analysis confirmed the presence of Ba, C and O. The peaks at 2θ of 19.45, 23.90, 24.29, 27.72, 33.71, 34.08, 34.60, 41.98, 42.95, 44.18, 44.85, and 46.78 corresponding to (110), (111), (021), (002), (200), (112), (130), (221), (041), (202), (132) and (113) showed that BaCO3 NPs average size was ~18.3nm. SAED pattern confirmed that BaCO3 NPs are crystalline nature. BaCO3 NPs significantly inhibited cervical carcinoma cells, as evidenced by cytotoxicity assay. Immunofluorescence and fluorescence assays showed that BaCO3 NPs increased the expression and activity of caspase-3, an autocatalytic enzyme that promotes apoptosis. According to the results, green synthesis route has great potential for easy, rapid, inexpensive, eco-friendly and efficient development of novel multifunctional nanoparticles for the treatment of cancer.

Synthesis of BaCO3 Nano-particles Through a Polymer-Assisted Precipitation Method

BaCO3 powders with different morphologies have been synthesized by a simple polymer-assisted precipitation method. The influence of diethylene glycol (DEG) as a modifier on the powder particle characteristics has been investigated using XRD, FESEM, FT-IR, and VSM techniques. It is revealed that both crystallinity and crystallite size of particles can be greatly affected through the change in DEG:water ratio. The crystallite size decreases from 32 nm for water solution to 20 nm for DEG’s solution. The FESEM images also show that DEG:water volume ratio causes the shape of particle to change greatly. While particle synthesized in presence of water solution has rodlike shape with 900 nm in length and 276 nm in width, particle synthesized in DEG solution has completely spherical shape with a mean particle size of 93 nm. Finally, the performance of barium carbonate nano-particles produced in this work has been examined in the processing of barium hexaferrite magnetic phase.

A new inorganic framework in the synthesis of barium carbonate nanoparticles via convenient solid state decomposition route

BaCO3, a common mineral with important applications in industry, has been synthesized in the orthorhombic phase with a high purity. As a new precursor, barium-o-phthalate complex was applied to prepare BaCO3 nanoparticles via solvent-free thermal decomposition route. Thermogravimetric analysis (TGA) was applied to determine the thermal behavior of the complex. The products were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR). The best results were obtained for the sample prepared at 500°C. Transmission electron microscopy (TEM) of this product shows “bean-like” shaped nanoparticles with an average size of 35–70nm. The purity, composition and stoichiometry of the as-prepared sample were studied by Electron Diffraction X-ray spectroscopy (EDX) spectra.

FABRICATION OF BaCO3 NANO-RODS IN WATER/POLY VINYL ALCOHOL MIXED SOLVENTS

Barium carbonate nano-particles have been synthesized by a simple PVA-assisted precipitation method using hydrated barium chloride and sodium carbonate as the starting materials. Crystal structure and morphology of the products were evaluated by XRD and SEM techniques, respectively. XRD results indicated that under the identical experimental conditions, single phase BaCO 3 was produced. SEM results showed that in the presence of PVA as guide reagent in the solution, nano-rods with regular (facet) surfaces were obtained. The results also showed that the concentration of PVA in the solution, reaction time and temperature have obvious influence on the agglomeration nature and mean particle size of the products. At high concentration of PVA less agglomerated nano size particles of BaCO 3 were synthesized. Increasing the synthesis time and temperature resulted in increasing the average diameter of BaCO 3 nano-rods. The performance of produced barium carbonate in the processing of barium hexaferrite ceramic magnet via conventional route has been approved.

Preparation and Characterization of Barium Carbonate Nanoparticles

In this research barium carbonate nanoparticle with composition BaCO3 (Witherite) was prepared by using the gel-combustion (sol - gel) method. A precursor sol was obtained from barium nitrate. The molar ratio of citrate/nitrate=1.3 (CA/NO-3 =1.3) was used to prepare very fine powders of barium carbonate. The gels resulting from these sols were transformed into powders by an auto-combustion process at ≤400oC. The powders consisted of orthorhombic BaCO3 and one another additional phase. The barium carbonate nano-particles produced by the gel-combustion method were calcined in three different calcination temperatures T = 450 °C, T = 600 °C and T =750 °C. The pure orthorhombic phase was found at 450oC X-Ray diffraction. The effect of calcination temperature was studied in three various temperatures. The crystallite size XRD was estimated from the broadening of XRD peaks, using Scherrer's formula. Transmission electron microscope (TEM) and X-Ray diffraction (XRD) of the samples were used for characterization of the obtain products. The size of particles were produced by this method are between 1nm to 10nm.

Unprecedented formation of metastable monoclinic BaCO 3 nanoparticles

Barium carbonate nanoparticles (50–100 nm) were prepared by flame spray pyrolysis. The rapid quenching during the preparation process resulted in the unprecedented formation of pure monoclinic BaCO 3. The as-prepared materials were characterized by electron microscopy, X-ray diffraction as well as by thermogravimetric and differential scanning calorimetric analyses. At ambient conditions the metastable monoclinic phase transformed easily into the thermodynamically stable orthorhombic BaCO 3 (witherite) within a few days.