Progress in Tuning of Metastable Vaterite Calcium Carbonate

Jiang, Jiahu; Wu, Yue; He, Yao; Gao, Shuting; Zhang, Chen; Tong, Sarah Y.; Liu, Jia‐Ning

doi:10.15541/jim20160484

Cited by 7 publications

(2 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to previous studies, it is believed that electrostatic forces or crystal growth are responsible for the formation of hollow spheres. , Because of the electrostatic attraction, a large amount of calcium ions would attach to the surface of the polymer first, followed by the attachment of CO 2–3 to the Ca 2+ aggregates. Then, the initial calcium carbonate particles are formed, which eventually grow into spherical particles. − However, in our study, the formation process of spherical CaCO 3 crystals is significantly different.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Calcium Carbonate Hollow Microspheres and the Pelletization Mechanism by Electrostatic Attraction of PEG–SDS

Wang,

Yv,

et al. 2023

ACS Omega

View full text Add to dashboard Cite

Calcium carbonate is a common natural mineral with a wide range of applications. In this study, hollow calcite microspheres were successfully synthesized by using calcium chloride and sodium carbonate as raw materials in an SDS–PEG system. The results suggested that the appropriate concentration of SDS is necessary during the spherical crystallization of calcium carbonate. It was found that the crystals started to aggregate under the effect of SDS, and aggregation was enhanced with an increase in SDS concentration, leading to the transformation from hollow to solid microspheres. However, high temperatures will lead to the transformation from calcite to aragonite, resulting in the collapse of the formed spherical structure. Infrared spectroscopy and conductivity analysis suggested that when the concentration of SDS reached 0.3 g/L in the PEG–SDS system, SDS and PEG formed a spherical supramolecular structure. This structure could act as a template, leading to the aggregation of calcite through electrostatic attraction and finally to the formation of a hollow spherical structure.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis of Calcium Carbonate Hollow Microspheres and the Pelletization Mechanism by Electrostatic Attraction of PEG–SDS

Wang,

Yv,

et al. 2023

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Each Ca 2+ coordinates with six CO 3 2− ; that is, the coordination number of Ca 2+ in calcite is 6. Vaterite exhibits a hexagonal crystal system, where Ca 2+ and CO 3 2− are layered, similar to calcite, but there are two CaCO 3 molecules in each vaterite crystal cell; thus, the coordination number of Ca 2+ in vaterite is 12 [27,28].…”

Section: Effect Of Ca 2+ Source and Addition Methods On Mineralized P...mentioning

confidence: 99%

Regulation of Calcium Source and Addition Method for MICP in Repairing High-Temperature Concrete Damage

Wei

Fan²,

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

After exposure to high temperatures, the mechanical properties and durability of concrete structures are significantly reduced, and effective measures must be taken for reinforcement and repair. High-temperature concrete damage manifests as looseness, spalling, and cracks, which are suitable for microbial-induced carbonate precipitation. When repairing high-temperature concrete damage with microbial-induced carbonate precipitation (MICP), the calcium source is an important influencing factor. The type of calcium source and the method used to add calcium source will directly affect the mineralized products, which in turn affect the quality of the repair. In this study, the mineralized products of Sporosarcina pasteurii were qualitatively analyzed and the appropriate type of calcium source and addition method were determined. The repair effect on high-temperature concrete damage was also verified. The results showed that the mineralized products of Sporosarcina pasteurii were calcium carbonate, with mixed vaterite and calcite crystals. Calcium acetate was found to be the most appropriate calcium source, while the pre-calcium-source addition method was shown to be optimal. At each damage temperature, the compressive strength showed a certain degree of recovery, and the water absorption exhibited a certain degree of reduction. At 600 °C, the compressive strength of the repaired specimens increased up to 202.68% compared with the damaged specimens and the water absorption of the repaired specimens was 34.32% lower than that of the damaged specimens. The higher the damage temperature, the more obvious the repair effect.

show abstract

Experimental study of microorganism-induced calcium carbonate precipitation to solidify coal gangue as backfill materials: mechanical properties and microstructure

Wang

Zhang

Meng

et al. 2022

Environ Sci Pollut Res

View full text Add to dashboard Cite

Progress in Tuning of Metastable Vaterite Calcium Carbonate

Cited by 7 publications

References 38 publications

Synthesis of Calcium Carbonate Hollow Microspheres and the Pelletization Mechanism by Electrostatic Attraction of PEG–SDS

Synthesis of Calcium Carbonate Hollow Microspheres and the Pelletization Mechanism by Electrostatic Attraction of PEG–SDS

Regulation of Calcium Source and Addition Method for MICP in Repairing High-Temperature Concrete Damage

Experimental study of microorganism-induced calcium carbonate precipitation to solidify coal gangue as backfill materials: mechanical properties and microstructure

Contact Info

Product

Resources

About