characterization of calcium oxide nanoparticle s synthesized from duck eggshell s through ball milling and simple calcina tion method. The duck eggshell s were specifically chosen since it has a higher amount of calcium carbonate compared to chicken eggshells (Dewi et al., 2014). The milling time was varied from 2 to
Recently, calcium doped zinc oxide (Ca:ZnO) thin films received attention due to their remarkable properties, such as high chemical stability, large electromechanical coupling coefficient, high piezoelectric …
Abstract Calcium oxide (CaO) nanoparticles have been successfully synthesized from duck eggshells using ball milling method followed by simple calcination at 700°C for 7 hours. The observation on the morphology, size and shape of the particles of the eggshells powder was conducted through scanning electron microscope (SEM).
Presently, there are scarce studies about the calcium doped ZnO thin films deposited on solid substrates like glass and Si/SiO 2 with the use of powder coating, supercritical drying in ethyl alcohol or sol–gel …
Calcium oxide (CaO) nanoparticles have been successfully synthesized from duck eggshells using ball milling method followed by simple calcination at 700°C for 7 hours. The observation on the...
Modern nanotechnology encompasses every field of life. Nowadays, phytochemically fabricated nanoparticles are being widely studied for their bioactivities and biosafety. The present research studied the synthesis, characterization, stability, biocompatibility, and in vitro bioactivities of calcium oxide nanoparticles (CaONPs).
The crystalline structure of Ca (OH)2 and CaO nanoparticles were characterized by X-ray diffraction (XRD, PHILIPS, X'pert-MPD system, λ = 1.54 Å). …
Synthesis and Characterization of Porous Calcium Oxide Nanoparticles (CaO NPS). International Journal of Innovative Technology and Exploring ssEngineering (IJITEE), 8, 312-314 p. [6] Bello, S. A., Agunsoye, J. O., & Hassan, S. B. (2015). Synthesis of coconut shell nanoparticles via a top down approach: assessment of milling duration …
The white Ca (OH) 2 particles were then calcinated at 700 °C for three hours. A white powder was obtained, which was CaONPs. It was characterized by UV-Vis spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR).
The catalysts have some advantages, such as abundant occurrence, low cost, porous structure, and nontoxic. The materials were characterized by XRD, FTIR, TG/DTG, CO2-TPD, XPS, SEM, and BET methods. The thermal treatment produces small particles of CaCO3 and CaO that are responsible for the catalytic activity.
Diffractions of 2q values being used are 34.2o, 37.3o, 58.3o, 64.1o, and 67.3 o. Ca-O presence in the samples was detected by FT-IR characterization at wavenumber of 354,90 cm-1. SEM profile show reducing size of bones after decomposition in …
The objective of this work is to extract calcium oxide (CaO) from calcium carbonate (CaCO 3) available in chicken eggshells. CaO is white in colour possessing high porosity with narrow particle size distribution. CaO have very high percentage of ceramic yield.
The objective of this paper was to characterize the calcium oxide obtained from natural sources such as crab shell and eggshell, and evaluate its catalytic activity in transesterification of sunflower oil with methanol.
The catalytic activities of calcium oxide obtained from natural sources (crab shell and eggshell) were characterized and evaluated in the transesterification of vegetable oil. These catalysts are mainly composed of calcium carbonate, which is partially converted into CaO after calcination (900 °C for 2 h). The catalysts have some advantages ...
In this study, nano sized calcium oxide (CaO) catalyst is synthesized with high purity using thermal decomposition method and characterized using XRD and SEM techniques. The biodiesel...
The green synthesized CaO nanoparticles were characterized by using by FTIR, UV-Vis, SEM, XRD and EDX. CaO is particularly interest because it is regarded to be harmless for both people and animals. Many studies have shown that chemical processes can be used to make calcium oxide nanoparticles.
In this study, a novel technique was developed, which involves combination of Limex method and sol–gel method for the preparation of calcium oxide nanoparticles …
In this paper, the preparation of calcium oxide (CaO) nanoparticles (NPs) is reported by a precipitation method, using CaCl 2 and NaOH as starting raw materials. The produced NPs were characterized for chemical composition, phase composition, particle size distribution, morphological features, specific surface area, and crystallite sizes.
The synthesis of calcium phosphate powders was carried out via aqueous precipitation method, which is based on dissolution-precipitation involving a solid-liquid reaction between calcium oxide and phosphoric acid. The addition was carried out with a Ca/P molar ratio of 1.67. The synthesis was performed using deionized water.
Calcium oxide is a promising sorbent for the capture of carbon dioxide. In this work, CaO sorbents were prepared using different precursors, including Ca (NO 3) 2 ·4H 2 O, CaO, Ca (OH) 2, CaCO 3, and Ca (CH 3 COO) 2 ·H 2 O. Of these, the sorbent prepared from calcium acetate (CaAc 2 −CaO) resulted in the best uptake …
for introducing titrant and nitrogen gas. Calcium oxide (prepared from calcium carbonate heated for 3 h at 1100 °C) was added to the water. Phosphoric acid (con-centration 2 mol/L) was added to the calcium oxide/cal-cium hydroxide slurry at a rate of 0.3 mL/min to 0.6 mL/min and to a final Ca/P molar ratio of 1.67. The
The catalytic activities of calcium oxide obtained from natural sources (crab shell and eggshell) were characterized and evaluated in the transesterification of …
The objective of this study was to biosynthesize calcium oxide (CaO) with the employment of the extract of red dragon fruit peels ... Another characterization using Fourier-transform infrared spectroscopy (FTIR) showed the typical wave numbers that were observed at 505.35 and 540.07 cm −1. This could be noticed on the IR absorption …
Morphology and particle size of calcium hydroxides were characterized by field emission scanning electron microscopy (FE-SEM, S-4700). Specific surface area was analyzed by Brunauer–Emmett–Teller method (BET, Micromeritics ASAP2010). The SO 2 reactivity was measured by thermo-gravimetric analyzer (TGA, TA Instrument …
between calcium oxide and phosphoric acid. The addition was carried out with a Ca/P molar ratio of 1.67. The synthesis was performed using deionized water. The aqueous solution was agitated mechanically and then the calcium oxide was poured slowly into the water. The solution was kept for 2h under mechanical agitation before the addition
Snakehead Fish Bone (SFB) is a waste from food processing in Palembang. Fish bones have calcium content so they have a potential as a source of Calcium Oxide (CaO). Calcination of fish bones was carried out at a temperature of 900oC with variations of time 1, 2, 3, and 4 hours. The Nanoparticle Calcium Oxide (NCO) was prepared using the ball …
The catalysts have some advantages, such as abundant occurrence, low cost, porous structure, and nontoxic. The materials were characterized by XRD, FTIR, TG/DTG, CO2 …
Regarding biodiesel synthesis transesterification, the use of heterogeneous catalysts such as calcium oxide (CaO)-based catalysts has been advocated as a promising technology to address the limitations of conventional, homogeneous catalysts such as significant wastewater generation, low free fatty acids, low water tolerance, and inability …
Small increases in dietary calcium above normal requirements have been shown to exacerbate magnesium deficiency in rats fed a low-magnesium diet . One theory to explain how excess calcium might antagonize magnesium is that magnesium and calcium share a homeostatic regulating system that involves the calcium-sensing receptor.