Abstract A method for the fabrication of nanosystems Gd2O3, 90%Gd2O3–10%ZrO2, 80%Gd2O3–20%ZrO2, 70%Gd2O3–30%ZrO2 from salt solutions using freeze-drying is studied. Using the TEM method, the particle sizes (18–40 nm) after annealing at 700 оС are estimated. In the Gd2O3–ZrO2 system the phases of Gd2O3 and Gd2Zr2O7 are present. The acid-base properties of the surface are evaluated using the Hammett indicator method: there are Bronsted acid sites with pKa = 1.7; 2.1; 3.46; 5.2 and the Bronsted base site with pKa = 7.4. The addition of zirconium oxide to gadolinium oxide sharply increases the value of specific adsorption and donor surface properties. Using DSC method, the process of acid-base catalysis as exemplified by thermodestruction of activated carbon in the presence of the systems Gd2O3, Gd2O3–ZrO2 is assessed. Decomposition of activated carbon in the presence of Gd2O3, 90%Gd2O3–10%ZrO2, 80% Gd2O3 -20%ZrO2, and 70%Gd2O3–30%ZrO2 proceeds faster. The activation energy of the processes decreases from 1.67 to 0.56 kJ/mol, while the thermal effect and mass loss increase.

中文翻译：

---

氧化锆改性纳米氧化钆的合成与研究

摘要 研究了一种使用冷冻干燥从盐溶液中制备 Gd2O3、90%Gd2O3–10%ZrO2、80%Gd2O3–20%ZrO2、70%Gd2O3–30%ZrO2 纳米系统的方法。使用 TEM 方法，估计在 700 оС 退火后的粒径（18-40 nm）。在 Gd2O3-ZrO2 系统中，存在 Gd2O3 和 Gd2Zr2O7 相。使用哈米特指示剂法评估表面的酸碱性质：存在 pKa = 1.7 的布朗斯台德酸位点；2.1; 3.46；5.2 和 pKa = 7.4 的 Bronsted 碱基位点。将氧化锆添加到氧化钆中会显着增加比吸附和供体表面特性的值。使用 DSC 方法，评估了酸碱催化过程，例如在 Gd2O3、Gd2O3–ZrO2 系统存在下活性炭的热分解。在 Gd2O3、90%Gd2O3–10%ZrO2、80% Gd2O3 -20%ZrO2 和 70%Gd2O3–30%ZrO2 存在下，活性炭的分解进行得更快。这些过程的活化能从 1.67 kJ/mol 降低到 0.56 kJ/mol，而热效应和质量损失增加。