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http://dx.doi.org/10.4150/KPMI.2021.28.2.143

Synthesis and Optical Property of (GaN)1-x(ZnO)x Nanoparticles Using an Ultrasonic Spray Pyrolysis Process and Subsequent Chemical Transformation  

Kim, Jeong Hyun (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Ryu, Cheol-Hui (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Ji, Myungjun (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Choi, Yomin (Material Technology Center, System & Energy Division, Korea Testing Laboratory)
Lee, Young-In (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of Powder Materials / v.28, no.2, 2021 , pp. 143-149 More about this Journal
Abstract
In this study, (GaN)1-x(ZnO)x solid solution nanoparticles with a high zinc content are prepared by ultrasonic spray pyrolysis and subsequent nitridation. The structure and morphology of the samples are investigated by X-ray diffraction (XRD), field-emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The characterization results show a phase transition from the Zn and Ga-based oxides (ZnO or ZnGa2O4) to a (GaN)1-x(ZnO)x solid solution under an NH3 atmosphere. The effect of the precursor solution concentration and nitridation temperature on the final products are systematically investigated to obtain (GaN)1-x(ZnO)x nanoparticles with a high Zn concentration. It is confirmed that the powder synthesized from the solution in which the ratio of Zn and Ga was set to 0.8:0.2, as the initial precursor composition was composed of about 0.8-mole fraction of Zn, similar to the initially set one, through nitriding treatment at 700℃. Besides, the synthesized nanoparticles exhibited the typical XRD pattern of (GaN)1-x(ZnO)x, and a strong absorption of visible light with a bandgap energy of approximately 2.78 eV, confirming their potential use as a hydrogen production photocatalyst.
Keywords
$(GaN)_{1-x}(ZnO)_x$; Semiconductor solid solution; Ultrasonic spray pyrolysis; Nitridation; Photocatalysts;
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