Sonochemical preparation of pure t-LaVO₄ nanoparticles with the aid of tris(acetylacetonato)lanthanum hydrate as a novel precursor

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• 作者：Masoud Salavati-Niasari ; Leila Saleh ; Fatemeh Moh ; es ; Akbar Ghaemi
• 关键词：Orthovanadate ; Nanoparticle ; Ultrasonic method ; Tetragonal phase
• 刊名：Ultrasonics Sonochemistry
• 出版年：March, 2014
• 年：2014
• 卷：21
• 期：2
• 页码：653-662
• 全文大小：4378 K

文摘

Herein a simple and fast method is introduced for the synthesis of lanthanum orthovanadate (LaVO₄) nanoparticles under ultrasound irradiation. The effect of tris(acetylacetonato)lanthanum hydrate ([La(acac)₃路3H₂O]) and La(OAc)₃ as two different precursors on the morphology and phase purity of LaVO₄ was investigated. To optimum the particle size of the products, sonication time and the kind of surfactants have been changed. The as-synthesized products were characterized by XRD, FT-IR, SEM, TEM, and EDS. Based on the obtained results, it was found that the size and shape of the sonochemically formed LaVO₄ nanoparticles were dramatically dependent on the sonication time, type of surfactant and lanthanum precursor. According to the XRD results, it was observed that pure tetragonal phase lanthanum orthovanadate (t-LaVO₄) could be obtained only by using [La(acac)₃路3H₂O] as precursor under ultrasound irradiation for 30 min. On the other hand, monoclinic phase lanthanum orthovanadate (m-LaVO₄) with poor crystallinity has been produced by vigorous stirring at room temperature without sonication.