Preparation and properties of polyethylene-coated terbium complex/calcium carbonate composite fluorescent material

Song, Miaomiao; Tao, Dongliang; Li, Guohua; Jin, Feng; Zhang, Kun; Jiang, Guangpeng; Zhang, Lin; Wang, Yongzhong

doi:10.1016/j.jlumin.2018.06.013

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…This becomes especially important in the case of REE-doped synthetic CaCO 3 crystals, which are preferentially produced through the carbonation of Ca(OH) 2 under different settings, and are used in multifunctional applications such as solar cells, sensing and detection, and biological imaging 62–64 . For instance, binary CaCO 3 -Tb complexes used in the production of highly fluorescent composite materials could be readily investigated using both LIF and SEM-CL, due to the prominent Tb 3+ emissions in both calcite and aragonite and the suppressed Mn 2+ signal in pyrogenic carbonates 63 . Finally, it should be noted that the nucleation process of calcite and aragonite used in the development of biomimetic materials comprised of a combination of CaCO 3 and biopolymers (e.g.…”

Section: Resultsmentioning

confidence: 99%

Luminescence reveals variations in local structural order of calcium carbonate polymorphs formed by different mechanisms

Toffolo

Ricci

Caneve

et al. 2019

Sci Rep

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In nature, calcium carbonate (CaCO3) in the form of calcite and aragonite nucleates through different pathways including geogenic and biogenic processes. It may also occur as pyrogenic lime plaster and laboratory-precipitated crystals. All of these formation processes are conducive to different degrees of local structural order in CaCO3 crystals, with the pyrogenic and precipitated forms being the least ordered. These variations affect the manner in which crystals interact with electromagnetic radiation, and thus formation processes may be tracked using methods such as X-ray diffraction and infrared spectroscopy. Here we show that defects in the crystal structure of CaCO3 may be detected by looking at the luminescence of crystals. Using cathodoluminescence by scanning electron microscopy (SEM-CL) and laser-induced fluorescence (LIF), it is possible to discern different polymorphs and their mechanism of formation. We were thus able to determine that pyrogenic calcite and aragonite exhibit blue luminescence due to the incorporation of distortions in the crystal lattice caused by heat and rapid precipitation, in agreement with infrared spectroscopy assessments of local structural order. These results provide the first detailed reference database of SEM-CL and LIF spectra of CaCO3 standards, and find application in the characterization of optical, archaeological and construction materials.

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Section: Resultsmentioning

confidence: 99%