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Rodlike YMn2O5 Powders Derived from Hydrothermal Process Using Oxygen as Oxidant

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Liaoning Key Laboratory for Fabrication and Application of Superfine Inorganic Powders, Dalian Jiaotong University, Dalian 110621, China
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Department of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou 115014, China
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Author to whom correspondence should be addressed.
Materials 2020, 13(3), 805; https://doi.org/10.3390/ma13030805
Received: 7 January 2020 / Revised: 6 February 2020 / Accepted: 6 February 2020 / Published: 10 February 2020
A facile approach is proposed herein to fabricate YMn2O5 powders with the hydrothermal method with oxygen as an oxidant. The structure and morphology of the as-synthesized YMn2O5 powders were characterized by XRD, SEM, and high-resolution transmission electron microscopy (HRTEM). The results manifested that the main factors that affected the formation of the rod-like YMn2O5 structures were the stirring time, hydrothermal temperature, and hydrothermal time. The oxidation time in the air had a remarkable effect on the final product by oxidizing Mn2+ ions to Mn3+ ions and Mn4+ ions. The obtained YMn2O5 powder was single crystalline and possessed a nanorod morphology, where the growth direction was along the c axis. The possible formation mechanism involved a dissolution–crystallization mechanism. Under the 397 nm excitation, the Mn4+ ions exhibited an intense orange emission at 596 nm. The energy bandgap of YMn2O5 powders was 1.18 eV. View Full-Text
Keywords: yttrium manganite; hydrothermal method; formation mechanism; luminescent properties yttrium manganite; hydrothermal method; formation mechanism; luminescent properties
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MDPI and ACS Style

Shi, J.; Wang, J.; He, H.; Lu, Y.; Shi, Z. Rodlike YMn2O5 Powders Derived from Hydrothermal Process Using Oxygen as Oxidant. Materials 2020, 13, 805.

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