한국입자에어로졸학회지 (Particle and aerosol research)

  • 제14권4호
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  • Pages.145-151
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  • 2018
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  • 1738-8716(pISSN)
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  • 2287-8130(eISSN)
한국입자에어로졸학회 (Korean Association for Particle and Aerosol Research)
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봉상형 육티탄산칼륨(K2Ti6O13) 제조 및 형상제어

Synthesis and Morphology Control of Rod Shaped Potassium Hexatitanate

  • 이총민 (한국지질자원연구원 자원활용연구센터) ;
  • 장한권 (한국지질자원연구원 자원활용연구센터) ;
  • 장희동 (한국지질자원연구원 자원활용연구센터)
  • Lee, Chongmin (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Chang, Hankwon (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Jang, Hee Dong (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources)
  • 투고 : 2018.12.05
  • 심사 : 2018.12.22
  • 발행 : 2018.12.31
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초록

Rod shaped Potassium hexatitanate ($K_2Ti_6O_{13}$) was synthesized from colloidal mixture of $TiO_2$, KOH and graphene oxide (GO) by aerosol spray drying and post heat treatment. Firstly, $TiO_2-KOH-GO$ composites were fabricated by aerosol spray drying in argon atmosphere. The composites were then calcined to form a rod shaped morphology of potassium titanate (KTO) in the presence of graphene at $900^{\circ}C$ for 3 h in argon atmosphere. Finally, the rod shaped KTO was obtained after removal of graphene (GR) at $800^{\circ}C$ and 3 h in air atmosphere. Characterization of the synthesized $K_2Ti_6O_{13}$ was carried out using the XRD, BET and FE-SEM. The length and diameter of the synthesized $K_2Ti_6O_{13}$ could be controlled by weight fraction of GO in the aerosol precursor. The length of $K_2Ti_6O_{13}$ rod increased with decreasing its diameter as GO concentration increased. The aspect ratio of the synthesized $K_2Ti_6O_{13}$ rod was controlled from 5 to 13.

키워드

KKOSBF_2018_v14n4_145_f0001.png 이미지

Fig. 1. Schematic illustration of the fabrication process for rod shaped K2Ti6O13.

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Fig. 2. X-ray diffraction patterns of the GR/K2Ti6O13 fabricated at different concentration of graphene oxide at 900℃ in Ar atmosphere.

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Fig. 3. X-ray diffraction patterns of the K2Ti6O13 fabricated at different concentration of graphene oxide at 800℃ in air atmosphere.

KKOSBF_2018_v14n4_145_f0004.png 이미지

Fig. 4. FE-SEM images of the rod shaped K2Ti6O13 prepared at different concentration of graphene oxide: (a) 0%; (b) 5%; (c) 30%.

KKOSBF_2018_v14n4_145_f0005.png 이미지

Fig. 5. Aspect ratio of the rod shaped K2Ti6O13 prepared at different concentration of graphene oxide: (a) 0%; (b) 5%; (c) 30%.

KKOSBF_2018_v14n4_145_f0006.png 이미지

Fig. 6. Average aspect ratio of the rod shaped K2Ti6O13 prepared at different concentration of graphene oxide

KKOSBF_2018_v14n4_145_f0007.png 이미지

Fig. 7. Specific surface area of the rod shaped K2Ti6O13 prepared at different concentration of graphene oxide

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