반도체디스플레이기술학회지 (Journal of the Semiconductor & Display Technology)

한국반도체디스플레이기술학회 (The Korean Society Of Semiconductor & Display Technology)
권호 표지

수열합성 공정으로 합성된 산화갈륨의 상변화에 따른 광촉매 특성

Photocatalytic Properties of Hydrothermally Synthesized Gallium Oxides at Different Phase Polymorphs

  • 류희중 (한국항공대학교 신소재공학과) ;
  • 김선재 (한국항공대학교 신소재공학과) ;
  • 이인규 (한국항공대학교 신소재공학과) ;
  • 오훈정 (연세대학교 비아이티마이크로팹연구소) ;
  • 황완식 (한국항공대학교 신소재공학과)
  • Ryou, Heejoong (Department of Materials Science and Engineering, Korea Aerospace University) ;
  • Kim, Sunjae (Department of Materials Science and Engineering, Korea Aerospace University) ;
  • Lee, In Gyu (Department of Materials Science and Engineering, Korea Aerospace University) ;
  • Oh, Hoon-Jung (BIT Micro Fab Research Center, Yonsei University) ;
  • Hwang, Wan Sik (Department of Materials Science and Engineering, Korea Aerospace University)
  • 투고 : 2021.06.08
  • 심사 : 2021.06.22
  • 발행 : 2021.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

GaOOH is obtained via hydrothermal synthesis procedure. The formed GaOOH is turned into α-Ga2O3 at 500℃ annealing. As the annealing temperatures increase the α-Ga2O3 is in part turned into β-Ga2O3 and fully turned into β-Ga2O3 after 1100℃. XPS and PL results reveal that heterojunction interface between α-Ga2O3 and β-Ga2O3 become maxim at 500℃ annealing condition, which result in the highest photocatalytic activity. The presence of heterojunction interface slows down the recombination process by separating photogenerated electron-hole pairs and thereby enhance the overall photocatalytic activity.

키워드

과제정보

이 연구는 한국연구재단의 기초연구사업(과제번호 NRF- 2017R1A 2B2004986)의 지원을 받아 출간되었다.

참고문헌

  1. Kim, J. G., Yang, O., "Efficiency Characteristics of DCDC Boost Converter Using GaN, Cool MOS, and SiC MOSFET", Journal of the Semiconductor & Display Technology, Vol. 16, pp. 49-54, 2017.
  2. Oh, T., "CO2 Gas Responsibility of SnO5 Thin Film Depending on the Annealing Temperature", Journal of the Semiconductor & Display Technology, Vol. 16, pp. 75-78, 2017.
  3. Yoo, T. H., Ryou, H., Lee, I. G., Cho, J., Cho, B. J., and Hwang, W. S., "Comparison of Ga2O3 and TiO2 Nanostructures for Photocatalytic Degradation of Volatile Organic Compounds", Catalysts, Vol. 10, pp. 545, 2020. https://doi.org/10.3390/catal10050545
  4. Bae, H. J., Yoo, T. H., Kim, S., Choi, W., Song, Y. S., Kwon, D. K., Cho, B. J. and Hwang, W. S., "Enhanced Photocatalytic Degradation of 2-Butanone Using Hybrid Nanostructures of Gallium Oxide and Reduced Graphene Oxide Under Ultraviolet-C Irradiation", Catalysts, Vol. 9, pp. 449, 2019. https://doi.org/10.3390/catal9050449
  5. Yoo, T. H., Ryou, H., Lee, I. G., Cho, B. J., and Hwang, W. S., "Enhanced Photocatalytic Activity of Electrospun β-Ga2O3 Nanofibers via In-Situ Si Doping Using Tetraethyl Orthosilicate", Catalysts, Vol. 9, pp. 1005, 2019. https://doi.org/10.3390/catal9121005
  6. Ryou, H., Yoo, T. H., Yoon, Y., Lee, I. G., Shin, M., Cho, J., Cho, B. J. and Hwang, W. S., "Hydrothermal synthesis and photocatalytic property of Sn-doped βGa2O3 nanostructure", ECS J. Solid State Sci. Technol., Vol. 9, pp. 045009, 2020. https://doi.org/10.1149/2162-8777/ab8b4b
  7. Zhang, T., Lin, J., Zhang, X., Huang, Y., Xu, X., Xue, Y., Zou, J. and Tang, C., "Single-crystalline spherical β-Ga2O3 particles: Synthesis, N-doping and photoluminescence properties", J. Lumin., Vol. 140, pp. 30-37, 2013. https://doi.org/10.1016/j.jlumin.2013.02.031
  8. Gao, H., Muralidharan, S., Pronin, N., Karim, M. R., White, S. M., Asel, T., Foster, G., Krishnamoorthy, S., Rajan, S., Cao, L. R., Higashiwaki, M., von Wenckstern, H., Grundmann, M., Zhao, H., Look, D. C. and Brillson, L. J., "Optical signatures of deep level defects in Ga2O3", Appl. Phys. Lett., Vol. 112, pp. 242102, 2018. https://doi.org/10.1063/1.5026770
  9. Wang, X., Xu, Q., Li, M., Shen, S., Wang, X., Wang, Y., Feng, Z., Shi, J., Han, H. and Li, C., "hotocatalytic overall water splitting promoted by an α-β phase junction on Ga2O3", ngew. Chem., Vol. 124, pp. 13266-13269, 2012.