multiparametric study of the hydrothermalsynthesis of ThSiO4, thorite, was performed with the aim of determining the most efficient conditions to form single-phase samples. Among the experimental parameters examined, significant effects were found for the concentration of reactants in the starting mixture, pH of the reactive media, and temperature of the hydrothermal process. Such parameters affected
为了确定形成单相样品的最有效条件,对水热合成ThSiO 4(石)进行了多参数研究。在所检查的实验参数中,发现对起始混合物中反应物的浓度,反应介质的pH值和水热过程的温度有显着影响。这些参数既影响了rite石的形成速率,也影响了合成终产物的形态。从C HNO3 = 0.3 mol L –1开始,在很宽的pH范围内都能获得纯ThSiO 4的沉淀。pH值达到9.1,收率超过95%。温度高于160°C时,容易形成of石。最后,要获得纯硅酸th,需要required和硅的浓度高于2.1×10 –3 mol L –1。
Synthesis and Characterization of Thorite Nanoparticles by Hydrothermal Method
作者:A. Ghadiri、M. Abdollahy、A. Khanchi、M. R. Khalesi、M. Akbari
DOI:10.1134/s0036023619140122
日期:2019.12
important of these parameters were the pH of solution in hydrothermal process and volumetric ratio of SiO2 : ThCl4. The optimum pH in the hydrothermal process was 8–9, which was obtained by buffering with sodium bicarbonate. The increasing of volumetric ratio of SiO2 : ThCl4 led to gelatinization of synthetic material. The operating conditions of synthesis of thorite were determined as follows: volumetric
Thorite, (ThSiO4) with a zircon type structure, is one of the most abundant natural sources of thorium on Earth. Generally, actinides are known to form nanoparticles in silicate medium, though no direct link between those colloids and the crystalline form of thorite was evidenced until now. Here we show the formation of thorite from colloids and nanocrystalline structures under experimental conditions