한국분말재료학회지 (Journal of Powder Materials)

  • 제28권2호
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  • Pages.143-149
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  • 2021
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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초음파 분무 열분해와 화학적 변환 공정을 이용한 (GaN)1-x(ZnO)x 나노입자의 합성과 광학적 성질

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

  • 김정현 (서울과학기술대학교 신소재공학과) ;
  • 류철희 (서울과학기술대학교 신소재공학과) ;
  • 지명준 (서울과학기술대학교 신소재공학과) ;
  • 최요민 (한국산업기술시험원 시스템에너지본부 재료기술센터) ;
  • 이영인 (서울과학기술대학교 신소재공학과)
  • 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)
  • 투고 : 2021.04.18
  • 심사 : 2021.04.22
  • 발행 : 2021.04.28
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초록

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.

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과제정보

이 연구는 서울과학기술대학교 교내연구비의 지원으로 수행되었습니다.

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