CeO2-CePO4 and Ag@CeO2-CePO4 nanocomposites from Penaeus semisulcatus for heavy metals sensing, UV shielding and cytotoxic applications

Muthukumar Sivaraman, Rajendran; Daphne Jacinth Gracia, Kirubaharan; Sheeba Thavamani, Seth; Peter Amaladhas, Thomas; Devanesan, Sandhanasamy; AlSalhi, Mohamad S; Asemi, Nassar N.; Natarajan, Srinivasaprabhu

doi:10.1016/j.arabjc.2023.105382

Cited by 2 publications

(1 citation statement)

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“…In previous studies regarding cerium phosphates as UV-protective materials, much attention was paid to Ce(III) compounds [12][13][14][15][16], and only a few reports were devoted to Ce(IV) phosphates [17,18] or cerium phosphate composites with CeO 2 [19,20]. All of these materials have been shown to possess a high-enough absorption in the UV range and extremely low photocatalytic activity, which makes them suitable for use in sunscreen cosmetics.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Cerium(III) and Cerium(IV) Phosphates for Sunscreens

Kozlova,

Vasilyeva,

Kozlov

et al. 2024

Molecules

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Crystalline cerium(III) phosphate (CePO4), cerium(IV) phosphates, and nanocrystalline ceria are considered to be promising components of sunscreen cosmetics. This paper reports on a study in which, for the first time, a quantitative comparative analysis was performed of the UV-shielding properties of CePO4, Ce(PO4)(HPO4)0.5(H2O)0.5, and CePO4/CeO2 composites. Both the sun protection factor and protection factor against UV-A radiation of the materials were determined. Ce(PO4)(HPO4)0.5(H2O)0.5 was shown to have a sun protection factor of 2.9, which is comparable with that of nanocrystalline ceria and three times higher than the sun protection factor of CePO4. Composites containing both cerium dioxide and CePO4 demonstrated higher sun protection factors (up to 1.8) than individual CePO4. When compared with the TiO2 Aeroxide P25 reference sample, cerium(III) and cerium(IV) phosphates demonstrated negligible photocatalytic activity. A cytotoxicity analysis performed using two mammalian cell lines, hMSc and NCTC L929, showed that CePO4, Ce(PO4)(HPO4)0.5(H2O)0.5, and nanocrystalline ceria were all non-toxic. The results of this comparative study indicate that cerium(IV) phosphate Ce(PO4)(HPO4)0.5(H2O)0.5 is more advantageous for use in sunscreens than either cerium(III) phosphate or CePO4/CeO2 composites, due to its improved UV-shielding properties and low photocatalytic activity.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study of Cerium(III) and Cerium(IV) Phosphates for Sunscreens

Kozlova,

Vasilyeva,

Kozlov

et al. 2024

Molecules

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Green synthesis of La₂O₃–LaPO₄ nanocomposites using Charybdis natator for DNA binding, cytotoxic, catalytic, and luminescence applications

Sivaraman,

Gracia,

Thavamani

et al. 2024

Green Processing and Synthesis

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A one-step biosynthetic pathway for the fabrication of La2O3–LaPO4 nanocomposites (NCs) was developed, employing Charybdis natator. The structure and phase changes of the NCs were confirmed, and their diverse applications were explored. The peaks at 206, 332, and 442 nm in UV-DRS studies confirmed the formation of La2O3–LaPO4 NCs. Fourier transform infrared spectral analysis revealed La–O stretching at 716 cm−1 and the presence of PO 4 3 − {\text{PO}}_{4}^{3-} bands at 532, 560, 578, and 618 cm−1. X-ray diffraction patterns showed a hexagonal phase of La2O3 with peaks at 2θ 11.04 and 28.57 and monoclinic LaPO4 phases at 2θ = 18.79 and 41.88. X-ray photoelectron spectroscopy data showed binding energy peaks at 836.04 and 852.77 eV, corresponding to 3d5/2 and 3d3/2 of the lanthanum. The average particle size from HR-TEM analysis was 28.95 nm after annealing at 800°C and SAED patterns confirmed their crystalline nature. The high affinity of the NCs towards ctDNA was established by a binding constant value of 2.08 (mg·mL−1)−1. Under UV exposure, 96% degradation efficiency for methyl orange within 120 min at pH 4 was displayed, with a rate constant of 2.72 × 10−2 min−1 affirming their photocatalytic potential. Their biocompatibility was assessed through MTT assay and luminescence characteristics were evaluated.

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CeO2-CePO4 and Ag@CeO2-CePO4 nanocomposites from Penaeus semisulcatus for heavy metals sensing, UV shielding and cytotoxic applications

Cited by 2 publications

References 71 publications

A Comparative Study of Cerium(III) and Cerium(IV) Phosphates for Sunscreens

A Comparative Study of Cerium(III) and Cerium(IV) Phosphates for Sunscreens

Green synthesis of La₂O₃–LaPO₄ nanocomposites using Charybdis natator for DNA binding, cytotoxic, catalytic, and luminescence applications

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CeO2-CePO4 and Ag@CeO2-CePO4 nanocomposites from Penaeus semisulcatus for heavy metals sensing, UV shielding and cytotoxic applications

Cited by 2 publications

References 71 publications

A Comparative Study of Cerium(III) and Cerium(IV) Phosphates for Sunscreens

A Comparative Study of Cerium(III) and Cerium(IV) Phosphates for Sunscreens

Green synthesis of La2O3–LaPO4 nanocomposites using Charybdis natator for DNA binding, cytotoxic, catalytic, and luminescence applications

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Product

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Green synthesis of La₂O₃–LaPO₄ nanocomposites using Charybdis natator for DNA binding, cytotoxic, catalytic, and luminescence applications