A facile method to control the morphologies of barium sulfate particles by using carboxylic carbon quantum dots as a regulator

Li, Lingyun; Yan, Ze; He, Xiaoyun; Zhang, Xiaoqi; Wang, Suisui; Guo, Shiqian; Tang, Na; Wang, Xiaocong

doi:10.1016/j.colsurfa.2021.127668

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…By further increasing the number of CDs, the nucleation growth rate of CaCO 3 is further reduced and the flower-like structure is further shortened to rough surface spherical and smooth surface spherical structures (Figure e,f). , The concentration of CDs continues to increase, the solution reaches supersaturation and helical growth induces further derivation of spherical CaCO 3 into binary crystal aggregates, as more stable and independent smooth spherical crystals, reaching the lowest energy state of the system (Figure S3a). This process involves several processes, including selective adsorption of CDs to crystals, inhibition of crystal growth by CDs, supersaturation of CDs to a solution, spiral growth mechanism, or a combination of these phenomena. − …”

Section: Results and Discussionmentioning

confidence: 99%

Controllable Synthesis of Carbon Dots@CaCO₃ Composites: Tunable Morphology, UV Absorption Properties, and Application as an Ultraviolet Absorber

Qiu

et al. 2022

Crystal Growth & Design

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Ultraviolet (UV) absorbers are of vital importance in reducing the damage of UV irradiation to materials, incredibly effective in delaying the life of polymers. However, commercial inorganic UV absorbers tend to generate free radicals that accelerate the decomposition of materials. The carbon dots (CDs) that mineralize CaCO 3 to different degrees to prepare excellent UV absorbers with UV absorption properties were proposed in this work. CDs with a negative charge of −3.77 mV and a surface rich in functional groups such as −COOH, −OH, −NH 2 , and −CO were synthesized by a one-step method to induce the typical rhombic CaCO 3 to form other irregular morphologies, including polycrystalline rhombic, flower-like, flower-like with more petals, and smooth spherical shapes. The UV absorption properties of CDs endow CaCO 3 with a strong UV absorption capacity at 200−400 nm and the stability of spherical CDs@CaCO 3 is higher than that of pure CDs. It shows that spherical CDs@CaCO 3 have superior dispersibility, optical stability, high-temperature resistance, and anti-photoaging performance. Finally, to reflect the practical application of CDs@CaCO 3 , it was compounded with polyurethane (PU). It increases the UV resistance and mechanical properties of PU film, and the application of light conversion film has great potential in agriculture. The development of a new inorganic UV absorber has excellent prospects for application in the field of UV resistance.

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Section: Results and Discussionmentioning

confidence: 99%

Controllable Synthesis of Carbon Dots@CaCO₃ Composites: Tunable Morphology, UV Absorption Properties, and Application as an Ultraviolet Absorber

Qiu

et al. 2022

Crystal Growth & Design

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“…However, sediments formed by ferric iron ions from FeCl 3 (solubility in water: 920 g/l at 20 °C) produce a smaller aggregate of crystals. They are nif.early distinct from precipitates without Sr 2+ and Fe 3+ ions [36,37].…”

Section: Crystal Morphology Of Barium Sulfatementioning

confidence: 92%

The Effect of Sr<sup>2+</sup> and Fe<sup>3+</sup> Cations and the Stirring Speed on The Precipitation of Barium Sulfate in a Batch System

Susilowati,

Karaman,

Prayuga

et al. 2023

Atom Indo.

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The batch system investigation explored the effect of Sr2+ and Fe3+ cations and the stirring speed on the characteristics of precipitated barium sulfate. A series of experiments were conducted to evaluate the rate of barium sulfate precipitation in laboratory equipment from brines containing barium ions (3500 ppm) and varying amounts of Sr2+ and Fe3+ ions (10 and 20 ppm). Kinetic analysis was also performed to explore how stirring speeds (240 and 480 rpm) affect barium sulfate scales' crystallization by increasing the stirring speed and promoting Sr2+ and Fe3+-cation solubility while decreasing the precipitation rate. All solid crystals obtained were mostly pure barite, as the X-ray diffraction (XRD) method confirmed. The SEM micrograph of barite morphology revealed particles with tablet-shaped crystals 2 to 5 nm in size. With the presence of Sr2+ and Fe3+-cation, the shape of barium sulfate was modified into spherical tablets or flower-like clusters of tablets. Meanwhile, the morphological changes could result from increased stirring rates. Moreover, the kinetic results yielded a general reaction rate equation that might be used to estimate barium sulfate deposition in pipelines for various brine, supersaturation, and mixing time durations.

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A facile method to control the morphologies of barium sulfate particles by using carboxylic carbon quantum dots as a regulator

Cited by 2 publications

References 22 publications

Controllable Synthesis of Carbon Dots@CaCO₃ Composites: Tunable Morphology, UV Absorption Properties, and Application as an Ultraviolet Absorber

Controllable Synthesis of Carbon Dots@CaCO₃ Composites: Tunable Morphology, UV Absorption Properties, and Application as an Ultraviolet Absorber

The Effect of Sr<sup>2+</sup> and Fe<sup>3+</sup> Cations and the Stirring Speed on The Precipitation of Barium Sulfate in a Batch System

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A facile method to control the morphologies of barium sulfate particles by using carboxylic carbon quantum dots as a regulator

Cited by 2 publications

References 22 publications

Controllable Synthesis of Carbon Dots@CaCO3 Composites: Tunable Morphology, UV Absorption Properties, and Application as an Ultraviolet Absorber

Controllable Synthesis of Carbon Dots@CaCO3 Composites: Tunable Morphology, UV Absorption Properties, and Application as an Ultraviolet Absorber

The Effect of Sr<sup>2+</sup> and Fe<sup>3+</sup> Cations and the Stirring Speed on The Precipitation of Barium Sulfate in a Batch System

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Controllable Synthesis of Carbon Dots@CaCO₃ Composites: Tunable Morphology, UV Absorption Properties, and Application as an Ultraviolet Absorber

Controllable Synthesis of Carbon Dots@CaCO₃ Composites: Tunable Morphology, UV Absorption Properties, and Application as an Ultraviolet Absorber