喷雾热解法绿色短流程制备大比表面积CeO纳米颗粒
Green and Short Preparation of CeO Nanoparticles with Large Specific Surface Area by Spray Pyrolysis.
作者信息
Wu Yongfu, Li Hong, Bian Xue, Wu Wenyuan, Wang Zhenfeng, Liu Yubao
机构信息
School of Metallurgy, Northeastern University, Shenyang 110819, China.
School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China.
出版信息
Materials (Basel). 2021 Aug 31;14(17):4963. doi: 10.3390/ma14174963.
Green and short preparation of CeO nanoparticles with large specific surface area from rare earth extraction (CeCl) was successfully achieved by spray pyrolysis (SP). In this method, a precursor solution is first prepared by mixing CeCl, CHO, and HO in the requisite quantities. Subsequently, the precursor consisting of a mixture of CeO and C was obtained by SP method by using the precursor solution. Finally, the calcination at 500 °C~800 °C in air for two hours to transform the precursor to CeO nanoparticles. Thermodynamic analysis and experimental studies were performed to determine the optimal SP temperature and citric acid amount. The results indicated that the maximum specific surface area (59.72 m/g) of CeO nanoparticles were obtained when the SP temperature was 650 °C and the molar ratio of citric acid to CeCl was 1.5.
通过喷雾热解（SP）成功实现了由稀土萃取物（CeCl）制备具有大比表面积的绿色短流程CeO纳米颗粒。在该方法中，首先通过按所需量混合CeCl、CHO和HO制备前驱体溶液。随后，使用该前驱体溶液通过喷雾热解方法获得由CeO和C的混合物组成的前驱体。最后，在空气中500℃至800℃煅烧两小时，将前驱体转化为CeO纳米颗粒。进行了热力学分析和实验研究以确定最佳喷雾热解温度和柠檬酸用量。结果表明，当喷雾热解温度为650℃且柠檬酸与CeCl的摩尔比为1.5时，获得了CeO纳米颗粒的最大比表面积（59.72 m²/g）。
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