Spherical vaterite microspheres of calcium carbonate synthesized with poly (acrylic acid) and sodium dodecyl benzene sulfonate

Zheng, Tao; Zhang, Xiao; Yi, Haihe

doi:10.1016/j.jcrysgro.2019.125275

Cited by 45 publications

(11 citation statements)

References 29 publications

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“…The FTIR spectra for CaCO3 crystals with and without glutamic acid are given in Figure 3. The FTIR spectrum of the CaCO3 crystals acquired in pure media is very similar in the intensity and position of the main characteristic absorption peak (712 cm −1 ) with that of calcite form reported by the previous studies (15)(16)(17). When the FTIR spectra for the crystals with 50 and 100 ppm glutamic acid at 30 min were examined, new additional absorption bands not in the spectrum of the crystals acquired in pure media were detected at 1085 cm −1 and 746 cm −1 belonged to the vaterite polymorph.…”

Section: Ftir Analysissupporting

confidence: 78%

Polymorphic Phase Change of Calcium Carbonate with Glutamic Acid as an Additive

Polat

Özalp

Sayan

2021

Journal of the Turkish Chemical Society Section A: Chemistry

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The calcium carbonate (CaCO3) crystals were successfully synthesized in the presence of glutamic acid used as an additive at 30 °C and at a pH of 8.5. The synthesized product was characterized in detail by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) to identify the structure and habit of the crystals. Moreover, the size and surface charge of the crystals were measured by particle size and zeta potential analyzer. XRD and FTIR results showed that both calcite and vaterite in forms of apparently CaCO3 crystals were obtained in the presence of 50 ppm additive concentration at t=30 min. When increasing the glutamic acid concentration in the suspension, the formed CaCO3 were only in the vaterite form. The SEM analysis results pointed out that the addition of the glutamic acid significantly changed the shape of the CaCO3. At t=30 min the resulting product sample was found to contain two types of polymorphs; larger cubic shaped calcite crystals and smaller spherical-like vaterite crystals. Further addition of high concentrations of the additive enhanced the adsorption of the glutamic acid, resulting in the smaller spherical-like ellipsoidal vaterite crystals. Investigation of the zeta potential analysis indicated that higher additive concentration (100 ppm) resulted in a positive surface charge of the crystals, whereas lower concentration (50 ppm) gave negative electrical charge. Moreover, filtration analysis pointed out that adding glutamic acid additive resulted in a less specific cake resistance value (5.01 × 10 11 m/kg) than that in pure media, which was 1.03 × 10 12 m/kg.

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Section: Ftir Analysissupporting

confidence: 78%

Polymorphic Phase Change of Calcium Carbonate with Glutamic Acid as an Additive

Polat

Özalp

Sayan

2021

Journal of the Turkish Chemical Society Section A: Chemistry

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“…Figure 8 is the FT-IR spectroscopy of CaCO 3 obtained in the absence and presence of Asp after 110 min, respectively. It can be seen that the characteristic diffraction peaks at 712 cm -1 mainly corresponded to calcite, while 745 cm -1 were the characteristic diffraction peaks of vaterite, [6,9,18] which demonstrated that vaterite was mainly produced in the presence of Asp, and when Asp was absent, the precipitates were calcite. In particular, when the Asp was added in the suspension, the FT-IR characteristic diffraction peaks at 1650 and 547 cm -1 were the symmetric stretching and out of plane swing of the carboxyl group (-COO − ) in the Asp, respectively.…”

Section: The Formation Mechanism Of Vaterite Aggregate Groovesmentioning

confidence: 97%

“…[7,8] Under different environmental conditions, some additives can effectively stabilize vaterite and delay its transformation into calcite. [9][10][11] Vaterite generally exists mainly in organisms rather than in nature. Amino acids with high biocompatibility have been widely DOI: 10.1002/crat.202100136 used as additives for the crystallization and growth process of vaterite, which has received extensive attention and research.…”

Section: Introductionmentioning

confidence: 99%

Formation and Stabilization of Vaterite Aggregate Grooves with Aspartic Acid (Asp) by Bubbling CO₂ into a Ca(OH)₂ Suspension

Zheng

2021

Crystal Research and Technology

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Vaterite aggregate grooves are successfully obtained by the Ca(OH) 2 -CO 2 reaction system in the presence of aspartic acid (Asp). Then, the dynamic changes of pH, conductivity, the concentration of Ca 2+ and OHin the suspension during the reaction process are tested. Moreover, the morphologies and polymorphs of the precipitates at different reaction time are studied by the field emission scanning electron microscope (FE-SEM) and X-ray Diffraction (XRD). The results show that when Asp is not added in the Ca(OH) 2 suspension, the precipitates are calcite, while the carbonization precipitates with Asp are vaterite. Furthermore, in the presence of Asp, the carbonization process in the Ca(OH) 2 suspension has a coating-fragmentation behavior, and vaterite aggregate grooves can be formed after 110 min. In particular, Asp plays an important role in the nucleation, crystallization, and growth of CaCO 3 , and then a novel formation mechanism of vaterite aggregate grooves is proposed in this paper.

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“…In this method, calcium chloride (CaCl 2 ) is exploited as a calcium source, and sodium carbonate (Na 2 CO 3 ) is used as a carbon source [ 35 ]. In some papers, different kinds of water-soluble additives have been used to control the crystal formation of the CaCO 3 , such as sucrose [ 37 ], anion surfactants [ 38 ], sodium dodecylbenzene sulfonate [ 39 ] and para-aminobenzoic acid [ 40 ]. Nanobubbles are clean and environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Air Nanobubbles on Controlling the Synthesis of Calcium Carbonate Crystals

Huang

et al. 2022

Materials

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Numerous approaches have been developed to control the crystalline and morphology of calcium carbonate. In this paper, nanobubbles were studied as a novel aid for the structure transition from vaterite to calcite. The vaterite particles turned into calcite (100%) in deionized water containing nanobubbles generated by high-speed shearing after 4 h, in comparison to a mixture of vaterite (33.6%) and calcite (66.3%) by the reaction in the deionized water in the absence of nanobubbles. The nanobubbles can coagulate with calcite based on the potential energy calculated and confirmed by the extended DLVO (Derjaguin–Landau–Verwey–Overbeek) theory. According to the nanobubble bridging capillary force, nanobubbles were identified as the binder in strengthening the coagulation between calcite and vaterite and accelerated the transformation from vaterite to calcite.

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Spherical vaterite microspheres of calcium carbonate synthesized with poly (acrylic acid) and sodium dodecyl benzene sulfonate

Cited by 45 publications

References 29 publications

Polymorphic Phase Change of Calcium Carbonate with Glutamic Acid as an Additive

Polymorphic Phase Change of Calcium Carbonate with Glutamic Acid as an Additive

Formation and Stabilization of Vaterite Aggregate Grooves with Aspartic Acid (Asp) by Bubbling CO₂ into a Ca(OH)₂ Suspension

The Influence of Air Nanobubbles on Controlling the Synthesis of Calcium Carbonate Crystals

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Spherical vaterite microspheres of calcium carbonate synthesized with poly (acrylic acid) and sodium dodecyl benzene sulfonate

Cited by 45 publications

References 29 publications

Polymorphic Phase Change of Calcium Carbonate with Glutamic Acid as an Additive

Polymorphic Phase Change of Calcium Carbonate with Glutamic Acid as an Additive

Formation and Stabilization of Vaterite Aggregate Grooves with Aspartic Acid (Asp) by Bubbling CO2 into a Ca(OH)2 Suspension

The Influence of Air Nanobubbles on Controlling the Synthesis of Calcium Carbonate Crystals

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Formation and Stabilization of Vaterite Aggregate Grooves with Aspartic Acid (Asp) by Bubbling CO₂ into a Ca(OH)₂ Suspension