Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Effect of solvent and precursor on the CeO2 nanoparticles fabrication

CeO2 나노 분말 합성에 미치는 용매 및 전구체의 영향

  • Ock, Ji-Young (School of Nano & Advanced Materials Eng., Changwon National Univ.) ;
  • Son, Jeong-Hun (School of Nano & Advanced Materials Eng., Changwon National Univ.) ;
  • Bae, Dong-Sik (School of Nano & Advanced Materials Eng., Changwon National Univ.)
  • 옥지영 (창원대학교 신소재공학과) ;
  • 손정훈 (창원대학교 신소재공학과) ;
  • 배동식 (창원대학교 신소재공학과)
  • Received : 2018.04.27
  • Accepted : 2018.06.08
  • Published : 2018.06.30
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Abstract

Ceria ($CeO_2$) is a rare earth oxide, which has been widely investigated to improve the property. It is important to increase the surface area of $CeO_2$, because high surface area of $CeO_2$ can improve the catalytic ability. $CeO_2$ nanoparticles were synthesized by a solvothermal process. A discussion on the influence of solvent ratio and precursors on $CeO_2$ nanoparticles was performed. The size and degree of the agglomeration of the synthesized $CeO_2$ could be tuned by controlling those parameters. The average size and distribution of prepared $CeO_2$ powders was in the range of 3 to 13 nm and narrow, respectively. The XRD pattern showed that the synthesized $CeO_2$ powders were crystalline with cubic phase of $CeO_2$. The average particle size was calculated by Scherrer equation and FE-TEM images. The morphology of the synthesized $CeO_2$ particle was objected using FE-TEM and FE-SEM. Specific surface area of the synthesized $CeO_2$ was determined using BET (Brunauer-Emmett-Teller) equation.

Cerium oxide는 촉매의 효율을 증가하기 위해서는 비표면적이 높은 것이 필요하여 많은 연구가 되고 있다. 비표면적이 높은 세리아 나노 입자를 용매열 공정으로 합성하였다. 세리아 입자 형성에 전구체의 종류와 용매의 비율이 미치는 영향에 대하여 연구하였다. 합성된 세리아의 응집 및 크기를 제어할 수 있었다. 합성된 입자의 크기는 약 3~13 nm이고, 분포는 균일하였다. 합성된 세리아의 결정상은 X-선 회절 분석결과 cubic이고, 미세구조는 투과전자현미경과 주사전자현미경으로 분석하였다. 합성된 세리아 입자의 비표면적은 BET로 측정하였다.

Keywords

References

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