Individual and synergetic effect of EDTA and NTA on polymorphism and morphology of CaCO3 crystallization process in presence of barium

Raj, K. Sanjiv; Devi, M. Nirmala; Kumaravel, P.; Subramanian, V.

doi:10.1016/j.jssc.2021.122026

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…It has been reported that in the presence of Ba 2+ ions, EDTA, and NTA, calcite crystals display a spherical shape rather than the usual diamond shape, which helps prevent scaling formation due to its cavity and structural instability. 22 This study focused on the morphology modification of lithium hydroxide monohydrate (LHM), which is an important basic lithium salt functioning as the lithium source of cathode materials of lithium batteries. However, the quality of LHM crystal products such as crystal morphology and size impacts its downstream processing and material performance.…”

Section: Introductionmentioning

confidence: 99%

“…Another focus is the application of modifiers in bioscience such as biomineralization − and kidney stone prevention. − A prominent example is the use of modifiers in morphology control of calcite. It has been reported that in the presence of Ba 2+ ions, EDTA, and NTA, calcite crystals display a spherical shape rather than the usual diamond shape, which helps prevent scaling formation due to its cavity and structural instability …”

Section: Introductionmentioning

confidence: 99%

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Versatile Roles of Modifiers in Crystal Growth and Morphology Modification of Lithium Hydroxide Monohydrate

Tang,

Zhang,

Tao

et al. 2024

Crystal Growth & Design

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Lithium hydroxide monohydrate (LHM) is an important lithium salt, which was widely used as the lithium source of cathode materials of the lithium battery. With the increasing global demand for lithium batteries, the market for LHM has expanded remarkably in recent years. However, LHM crystals are mostly flakes or needles with rough surfaces, strong hygroscopicity, and easy agglomeration, which is not conducive to storage and causes great product loss. Herein, we investigated the effect of various types of modifiers on the crystal growth modification and morphology modulation of LHM using a combination of crystallization experiments and density functional theory (DFT) calculations. Bulk LHM crystals were from a supersaturated solution of LHM, and the crystal morphology was indexed by single-crystal X-ray diffraction. Four types of potent modifiers were selected (including anionic surfactants, oxygen-rich polymers, hydroxyl-rich polymers, and carboxyl-rich polymers). The impact of various modifiers on the growth rate perpendicular to the (011) and (01̅ 1) surfaces was examined and evaluated through single-crystal growth experiments. TW20 and poly(ethylene glycol) (PEG) are potent inhibitors, and SDS and SLS serve as growth promoters. The action mechanisms of modifiers were revealed by binding specificity and DFT calculations through analyses of the surface electrostatic potential and adsorption energy. It was found that the electronegativity of the crystal surface plays an important role in determining the promotion or inhibition effect of selected modifiers. Our finding highlights the importance of electrostatic interactions in the screening of modifiers for inorganic salt crystals.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Versatile Roles of Modifiers in Crystal Growth and Morphology Modification of Lithium Hydroxide Monohydrate

Tang,

Zhang,

Tao

et al. 2024

Crystal Growth & Design

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A comparative study of alkanolamines and inorganic additives on the microstructure development of blast furnace slag blended cement at low curing temperature

Zhai,

Kurumisawa,

Moon

2023

Construction and Building Materials

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Influence of Foreign Salts and Antiscalants on Calcium Carbonate Crystallization

Hamdi

Tlili

2023

Crystals

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For more than a century, crystallization has remained a chief research topic. One of the most undesirable crystallization phenomena is the formation of calcium carbonate scale in drinking and industrial water systems. In this work, the influence of chemical additives on CaCO3 formation—in either nucleation, crystal growth, or inhibition processes—is investigated by using the CO2-degasification method. Chemical additives are foreign salts (MgCl2, Na2SO4 and MgSO4) to the calco-carbonic system and antiscalants (sodium polyacrylate ‘RPI’ and sodium-tripolyphosphate ‘STPP’). The results show that additives affects both crystallization kinetics and the CaCO3 microstructure. Sulfate and magnesium ions, added separately at constant ionic strength, influence the nucleation step more than the growth of the formed crystallites. Added simultaneously, their effect was accentuated on both nucleation and the growth of CaCO3. Furthermore, antiscalants RPI and STPP affect the crystallization process by greatly delaying the precipitation time and largely increasing the supersaturation coefficient. It was also shown that the calco-carbonic system with additives prefers the heterogeneous nucleation to the homogeneous one. X-ray diffraction patterns show that additives promote the formation of a new crystal polymorph of calcium carbonate as aragonite, in addition to the initial polymorphs formed as calcite and vaterite.

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Individual and synergetic effect of EDTA and NTA on polymorphism and morphology of CaCO3 crystallization process in presence of barium

Cited by 3 publications

References 25 publications

Versatile Roles of Modifiers in Crystal Growth and Morphology Modification of Lithium Hydroxide Monohydrate

Versatile Roles of Modifiers in Crystal Growth and Morphology Modification of Lithium Hydroxide Monohydrate

A comparative study of alkanolamines and inorganic additives on the microstructure development of blast furnace slag blended cement at low curing temperature

Influence of Foreign Salts and Antiscalants on Calcium Carbonate Crystallization

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