Facile preparation of micro and nano-sized CaCO3 particles by a new CO2-storage material

Zhao, Tianxiang; Zhang, Fei; Sha, Feng; Xu, Qiang; Guo, Bo; Wei, Xionghui

doi:10.1016/j.powtec.2016.06.038

Cited by 16 publications

(8 citation statements)

References 40 publications

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“…The pore size and pore volume values would indicate that the incorporation of Ni and Cu carbonates occurs preferentially on the surface of the solid, in agreement with the poor incorporation of these metals as compared with Fe. The isotherm plots of biogenic carbonates in Figure S2 show a typical interparticle macroporosity profile at relative pressures between 0.46 and 0.90, similar to previously reported CaCO 3 . − …”

Section: Results and Discussionsupporting

confidence: 85%

Solventless Amide Synthesis Catalyzed by Biogenic CaCO₃ Materials

Chaparro

Rojas

Castillo

et al. 2020

ACS Sustainable Chem. Eng.

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Biogenic carbonates were studied as catalysts in this work for the direct synthesis of amides under solvent-free conditions. Solids were synthesized by microbial coprecipitation of CaCl 2 and Ni salts and Cu and Fe salts. The catalysts were characterized by thermogravimetric analysis, nitrogen physisorption measurements, X-ray diffraction, and X-ray photoelectron spectroscopy. The polymorphism, hydrophilicity, and textural properties depended on the metal oxides type incorporated on CaCO 3 . N-Arylsuccinimides synthesis was employed as test reaction, obtaining remarkable selectivity and conversion in the reaction of succinic acid with p-toluidine and aniline, respectively. Optimized conditions were subsequently extended to the solvent-free synthesis of diverse amides in good yields using CuO−CaCO 3 as the catalyst in air. The direct amidation protocol was amenable to the use of different primary amines and nonactivated carboxylic acids.

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Section: Results and Discussionsupporting

confidence: 85%

Solventless Amide Synthesis Catalyzed by Biogenic CaCO₃ Materials

Chaparro

Rojas

Castillo

et al. 2020

ACS Sustainable Chem. Eng.

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“…The less intense band at 803 cm –1 is well-known for calcite, which might be derived from the Ca and O present in as-synthesized CaSnO 3. − …”

Section: Resultsmentioning

confidence: 99%

Innovation of Novel Stone-Like Perovskite Structured Calcium Stannate (CaSnO₃): Synthesis, Characterization, and Application Headed for Sensing Photographic Developing Agent Metol

Alagumalai

Chen

Abinaya³

et al. 2020

ACS Sustainable Chem. Eng.

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Inorganic perovskite-based alkaline earth oxide materials for electrochemical sensing devices are an unwrapped research field yet to be studied. Herein, we designed a novel perovskite-type calcium stannate (CaSnO3) material with stone-shaped structural morphology synthesized by a simple coprecipitation method with the aid of urea and utilized as an electrocatalyst for the electrochemical detection of photographic developing agent metol (MT). The synthesized CaSnO3 was systematically characterized with the help of X-ray diffraction (XRD), Raman, Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy, elemental mapping analysis, high resolution transmission electron microscope (HR-TEM), and electron spectroscopy for chemical analysis (ESCA). Furthermore, the electrochemical property of CaSnO3 was examined by cyclic voltammetry and differential pulse voltammetry techniques. As a result, CaSnO3 modified with a glassy carbon electrode (CaSnO3/GCE) implies better electrocatalytic activity with an enhanced redox peak response, wider linear range (0.01–123 μM), lower detection limit (0.003 μM), and appreciable sensitivity toward the detection of MT. In addition to that, the CaSnO3 modified electrode has excellent selectivity with the existence of potentially interfering compounds such as cationic/anionic species and biological substances. Moreover, the CaSnO3 modified electrode has better reproducibility, repeatability, and storage stability. Further, the practical viability of the synthesized CaSnO3 was investigated by using lake water as a real sample, revealing reasonable recovery results.

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“…Increasing the agitation time allows these secondary PCC particles to grow continuously. 19,20) The increase of the particle size with agitation time prepared from the 1.74 M CaCl 2 starting solution was rather modes in comparison to the size increases observed for the PCCs prepared from CaCl 2 solutions with lower concentrations. It should be noted that the smallest particle size of the synthesized PCCs was obtained at the shortest agitation time (30 s).…”

Section: Resultsmentioning

confidence: 83%

“…Changing the PCC morphology is probably due increased solubility at high temperatures, which has an effect on the morphology of PCCs. 1,20) 3.3 Effect of initial CaCl 2 concentrations and agitation times on the polymorphs of PCCs Calcite, vaterite, and aragonite are the common polymorphs of CaCO 3 but these polymorphs are different in their crystallographic characteristics and its applications. 1) Thus, optimum conditions for production of pure morphology are useful.…”

Section: Resultsmentioning

confidence: 99%

Factors Affecting the Particle Size of Bio-Calcium Carbonate Synthesized from Industrial Eggshell Waste

2018

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Calcium carbonate is broadly used as a catalyst support, filler, additive, and reinforcement in several types of industry e.g. chemical, food, and biomedical industry. Recently, eggshell waste has attracted much attention for the purpose of calcium carbonate production due to its compost about 96% calcium carbonate. However, direct use of egg shells as filler material can probably cause product defects. In this research, calcium chloride was extracted from chicken-eggshell waste followed by precipitation of micron size calcium carbonate. The effect of agitation time, the initial concentration of calcium chloride and synthesis temperature on particle size, and selected physicochemical properties of this precipitated calcium carbonate (PCC) were investigated. Scanning electron micrographs of the prepared materials illustrated that all of the PCCs obtained from these experiments exhibit uniform-round shape. The laser diffraction results show that the median size of the PCC particles increased significantly from about 6 µm to 19 µm with increasing agitation time and with decreasing initial concentration of calcium chloride. However, increasing the synthesis temperature from 30°C to 160°C only slightly increased the median size of the PCC particles. The results of X-ray diffraction indicated that both agitation time and initial concentration also have an effect on the crystalline morphology of the PCCs. In addition, calcite crystalline phase became dominant over the other crystalline phases when agitation time and initial concentration were increased. In comparison, PCCs synthesized from this eggshell waste have much smaller median particle size than commercial calcium carbonate. Furthermore, the purity of the PCC derived from shell waste was comparable to commercial calcium carbonate. This facile synthesis is environmentally friendly and cost effective.

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Facile preparation of micro and nano-sized CaCO3 particles by a new CO2-storage material

Cited by 16 publications

References 40 publications

Solventless Amide Synthesis Catalyzed by Biogenic CaCO₃ Materials

Solventless Amide Synthesis Catalyzed by Biogenic CaCO₃ Materials

Innovation of Novel Stone-Like Perovskite Structured Calcium Stannate (CaSnO₃): Synthesis, Characterization, and Application Headed for Sensing Photographic Developing Agent Metol

Factors Affecting the Particle Size of Bio-Calcium Carbonate Synthesized from Industrial Eggshell Waste

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Facile preparation of micro and nano-sized CaCO3 particles by a new CO2-storage material

Cited by 16 publications

References 40 publications

Solventless Amide Synthesis Catalyzed by Biogenic CaCO3 Materials

Solventless Amide Synthesis Catalyzed by Biogenic CaCO3 Materials

Innovation of Novel Stone-Like Perovskite Structured Calcium Stannate (CaSnO3): Synthesis, Characterization, and Application Headed for Sensing Photographic Developing Agent Metol

Factors Affecting the Particle Size of Bio-Calcium Carbonate Synthesized from Industrial Eggshell Waste

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Solventless Amide Synthesis Catalyzed by Biogenic CaCO₃ Materials

Solventless Amide Synthesis Catalyzed by Biogenic CaCO₃ Materials

Innovation of Novel Stone-Like Perovskite Structured Calcium Stannate (CaSnO₃): Synthesis, Characterization, and Application Headed for Sensing Photographic Developing Agent Metol