Green and Short Preparation of CeO2 Nanoparticles with Large Specific Surface Area by Spray Pyrolysis

Yongfu Wu; Hong Li; Xue Bian; Wenyuan Wu; Zhenfeng Wang; Yubao Liu

doi:10.3390/ma14174963

Green and Short Preparation of CeO₂ Nanoparticles with Large Specific Surface Area by Spray Pyrolysis

Materials (Basel). 2021 Aug 31;14(17):4963. doi: 10.3390/ma14174963.

Authors

Yongfu Wu^{1

2}, Hong Li^{2

3}, Xue Bian¹, Wenyuan Wu¹, Zhenfeng Wang², Yubao Liu⁴

Affiliations

¹ School of Metallurgy, Northeastern University, Shenyang 110819, China.
² School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China.
³ School of Energy and Civil Engineering, Shandong HuaYu University of Technology, Dezhou 253034, China.
⁴ State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou 014030, China.

Abstract

Green and short preparation of CeO₂ nanoparticles with large specific surface area from rare earth extraction (CeCl₃) was successfully achieved by spray pyrolysis (SP). In this method, a precursor solution is first prepared by mixing CeCl₃, C₆H₈O, and H₂O in the requisite quantities. Subsequently, the precursor consisting of a mixture of CeO₂ 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 CeO₂ 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 m²/g) of CeO₂ nanoparticles were obtained when the SP temperature was 650 °C and the molar ratio of citric acid to CeCl₃ was 1.5.

Keywords: CeO2; citric acid; specific surface area; spray pyrolysis; spray pyrolysis temperature.

Abstract

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