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Abstract <p>A new method for obtaining K<sub>2</sub>Ce(PO<sub>4</sub>)<sub>2</sub><i>·x</i>H<sub>2</sub>O (space group <i>I</i>4<sub>1</sub>/<i>amd</i>, <i>a</i> = <i>b</i> = 6.8300(2) Å, <i>c</i> = 17.8488(4) Å, <i>V</i> = 832.63(4) Å<sup>3</sup>, <i>Z</i> = 4) under hydrothermal conditions has been developed. It has been established that the thermolysis of this compound proceeds through three stages of mass loss with the formation of CePO<sub>4</sub> and K<sub>4</sub>P<sub>2</sub>O<sub>7</sub> as intermediate products, which upon further heating form a mixture of CePO<sub>4</sub> and K<sub>3</sub>Ce(PO<sub>4</sub>)<sub>2</sub>. The calculated values of the sun protection factor and UV-A protection factor for K<sub>2</sub>Ce(PO<sub>4</sub>)<sub>2</sub>·<i>x</i>H<sub>2</sub>O were 2.1 and 2.0, respectively. In relation to the human keratinocyte cell line (HaCaT), a photoprotective effect of K<sub>2</sub>Ce(PO<sub>4</sub>)<sub>2</sub>·<i>x</i>H<sub>2</sub>O was recorded. For the first time, the photoactive properties of KCe<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> and K<sub>2</sub>Ce(PO<sub>4</sub>)<sub>2</sub>·<i>х</i>H<sub>2</sub>O in the decomposition reaction of methylene blue were evaluated. A significant slowdown in the decomposition reaction of an organic dye was demonstrated when using K<sub>2</sub>Ce(PO<sub>4</sub>)<sub>2</sub>·<i>х</i>H<sub>2</sub>O.</p>

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Hydrothermal Synthesis of K2Ce(PO4)2·хH2O and Analysis of Its Photoprotective Properties

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • T. O. Kozlova,
  • D. N. Vasilyeva,
  • I. V. Savintseva,
  • A. L. Popov,
  • N. P. Simonenko,
  • D. A. Kozlov

摘要

Abstract

A new method for obtaining K2Ce(PO4)2·xH2O (space group I41/amd, a = b = 6.8300(2) Å, c = 17.8488(4) Å, V = 832.63(4) Å3, Z = 4) under hydrothermal conditions has been developed. It has been established that the thermolysis of this compound proceeds through three stages of mass loss with the formation of CePO4 and K4P2O7 as intermediate products, which upon further heating form a mixture of CePO4 and K3Ce(PO4)2. The calculated values of the sun protection factor and UV-A protection factor for K2Ce(PO4)2·xH2O were 2.1 and 2.0, respectively. In relation to the human keratinocyte cell line (HaCaT), a photoprotective effect of K2Ce(PO4)2·xH2O was recorded. For the first time, the photoactive properties of KCe2(PO4)3 and K2Ce(PO4)2·хH2O in the decomposition reaction of methylene blue were evaluated. A significant slowdown in the decomposition reaction of an organic dye was demonstrated when using K2Ce(PO4)2·хH2O.