Microwave hydrothermal synthesis and characterization of rare-earth stannate nanoparticles
来源期刊：International Journal of Minerals Metallurgy and Materials2017年第7期
论文作者：Shuang Huang Hua-lan Xu Sheng-liang Zhong Lei Wang
文章页码：794 - 803
摘 要：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.
Shuang Huang1，Hua-lan Xu1,2，Sheng-liang Zhong1，Lei Wang1
1. College of Chemistry and Chemical Engineering,Jiangxi Normal University2. Analytical and Testing Center,Jiangxi Normal University
摘 要：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.
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