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<p>Epoxide-assisted sol–gel synthesis and supercritical drying with CO<sub>2</sub> (scCO<sub>2</sub>) were employed to produce monolithic aerogels of samarium sesquioxide (Sm<sub>2</sub>O<sub>3</sub>) and mixed-phase with europium sesquioxide (Sm<sub>2</sub>O<sub>3</sub>/Eu<sub>2</sub>O<sub>3</sub>) at 50&#xa0;mol%. However, thermal treatment is usually required to enhance the luminescence of Ln<sup>3+</sup> ions, which compromises the porous structure of the aerogels. To overcome this, the compound 2-thenoyltrifluoroacetone (TTA) was added through click chemistry to functionalize the aerogels via the antenna effect. The monolithic aerogels exhibited an amorphous structure and mesoporous morphology, as evidenced by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses, while Fourier-transform infrared spectroscopy (FT-IR) and energy-dispersive X-ray spectroscopy (EDS) supported their M–O structural and chemical composition. Moreover, the functionalization in the Sm<sub>2</sub>O<sub>3</sub>/Eu<sub>2</sub>O<sub>3</sub>/TTA aerogel powders results in intense photoluminescence, caused by the <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>J</sub> and <sup>6</sup>G<sub>5/2</sub> → <sup>6</sup>H<sub>J</sub> transitions of Eu<sup>3+</sup> and Sm<sup>3+</sup> ions, respectively. For the first time, photoluminescent aerogel powders of the Sm<sub>2</sub>O<sub>3</sub>/Eu<sub>2</sub>O<sub>3</sub>/TTA system are reported, targeting potential optoelectronic applications.</p> Graphical abstract <p></p>

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Sol–gel synthesis of TTA-functionalized Sm2O3/Eu2O3 aerogels with enhanced photoluminescence

  • 期刊论文

  • 发表日期：

    2025年11月18日

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  • A. D. Alcantar-Mendoza,
  • M. del R. González-García,
  • A. García-Murillo,
  • R. I. Álvarez-González,
  • F. de J. Carrillo-Romo

摘要

Epoxide-assisted sol–gel synthesis and supercritical drying with CO2 (scCO2) were employed to produce monolithic aerogels of samarium sesquioxide (Sm2O3) and mixed-phase with europium sesquioxide (Sm2O3/Eu2O3) at 50 mol%. However, thermal treatment is usually required to enhance the luminescence of Ln3+ ions, which compromises the porous structure of the aerogels. To overcome this, the compound 2-thenoyltrifluoroacetone (TTA) was added through click chemistry to functionalize the aerogels via the antenna effect. The monolithic aerogels exhibited an amorphous structure and mesoporous morphology, as evidenced by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses, while Fourier-transform infrared spectroscopy (FT-IR) and energy-dispersive X-ray spectroscopy (EDS) supported their M–O structural and chemical composition. Moreover, the functionalization in the Sm2O3/Eu2O3/TTA aerogel powders results in intense photoluminescence, caused by the 5D0 → 7FJ and 6G5/2 → 6HJ transitions of Eu3+ and Sm3+ ions, respectively. For the first time, photoluminescent aerogel powders of the Sm2O3/Eu2O3/TTA system are reported, targeting potential optoelectronic applications.

Graphical abstract