Abstract
Nanocrystalline single-phase neodymium monoaluminate (NdAlO3) has been prepared from neodymium oxide and aluminium nitrate by modified Pechini’s method. Malic acid has been used for the first time as a new complexing agent in the sol–gel process. It has facilitated, without adding 1,2-ethanediol, a low-temperature synthesis at 1,050 °C compared to the temperature of 1,630 °C needed for the solid-state preparation. The characterisation of the nanoparticles has been carried out by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and infrared spectroscopy in the range 75–4,000 cm−1. The smallest particles have size of 30 nm and are anisometric; agglomerates of particles have been also observed. The material has pyknometric density of 3.956 g/cm3 at T = 293.15 K and specific surface area 5.2 m2/g. The binding energies of O 1s, Al 2p, Nd 3d, and Nd 4d electrons have been found chemically shifted in NdAlO3 compared to the values for the respective elements.
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Acknowledgments
The authors are thankful to Prof. D. Mehandjiev from the Institute of Kinetics and Catalysis, Bulgarian Academy of Sciences, Sofia, for his support in this research, and the University of Food Technologies-Plovdiv, for the financial assistance.
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Petrov, D., Angelov, B. Preparation and characterisation of NdAlO3 nanocrystals by modified sol–gel method. J Sol-Gel Sci Technol 53, 227–231 (2010). https://doi.org/10.1007/s10971-009-2081-4
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DOI: https://doi.org/10.1007/s10971-009-2081-4