Microwave hydrothermal synthesis and characterization of rare-earth stannate nanoparticles

• Published in: International journal of minerals, metallurgy and materials Vol. 24; no. 7; pp. 794 - 803
• Main Authors: Huang, Shuang, Xu, Hua-lan, Zhong, Sheng-liang, Wang, Lei
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.07.2017; Springer Nature B.V; Analytical and Testing Center, Jiangxi Normal University, Nanchang 330022, China; College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China%College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Composites; Corrosion and Coatings; Diameters; Earth; Electron microscopes; Emission measurements; Energy consumption; Fourier transforms; Gadolinium; Glass; Magnetic measurement; Materials Science; Metallic Materials; Methods; Morphology; Nanocrystals; Nanoparticles; Natural Materials; Phase composition; Rare earth elements; Surfaces and Interfaces; Temperature; Thin Films; Tribology; rare-earth stannate; nanoparticles; hydrothermal synthesis; microwave
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-017-1463-9

Rare-earth stannate（Ln2Sn2O7（Ln = Y, La–Lu）） nanocrystals with an average diameter of 50 nm were prepared through a facile microwave hydrothermal method at 200°C within 60 min. The products were well characterized. The effect of reaction parameters such as temperature, reaction time, p H value, and alkali source on the preparation was investigated. The results revealed that the p H value plays an important role in the formation process of gadolinium stannate（Gd2Sn2O7） nanoparticles. By contrast, the alkali source had no effect on the phase composition or morphology of the final product. Uniform and sphere-like nanoparticles with an average size of approximately 50 nm were obtained at the p H value of 11.5. A possible formation mechanism was briefly proposed. Gd2Sn2O7:Eu3+ nanoparticles displayed strong orange-red emission. Magnetic measurements revealed that Gd2Sn2O7 nanoparticles were paramagnetic. The other rare-earth stannate Ln2Sn2O7（Ln = Y, La–Lu） nanocrystals were prepared by similar approaches.