Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Effect of Ni Addition on ATiO3 (A = Ca, Sr, Ba) Perovskite Photocatalyst for Hydrogen Production from Methanol Photolysis

메탄올 광분해 수소제조를 위한 ATiO3 (A = Ca, Sr, Ba) Perovskite 광촉매의 Ni 첨가 영향

  • Kwak, Byeong Sub (Department of Chemistry, College of Science, Yeungnam University) ;
  • Park, No-Kuk (School of Chemical Engineering, College of Engineering, Yeungnam University) ;
  • Lee, Tae Jin (School of Chemical Engineering, College of Engineering, Yeungnam University) ;
  • Lee, Sang Tae (Wooshin Industrial Co. LTD.) ;
  • Kang, Misook (Department of Chemistry, College of Science, Yeungnam University)
  • Received : 2016.11.08
  • Accepted : 2016.12.04
  • Published : 2017.03.31
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Abstract

In this study, $ATiO_3$ (A = Ca, Sr, Ba) perovskite, which is the widely known for non $TiO_2$ photocatalysts, were synthesized using sol-gel method. And Ni was added at the A site of $ATiO_3$ by using that it is easy to incorporate. The physicochemical characteristics of the obtained $ATiO_3$ and Ni-$ATiO_3$ particles were confirmed using the X-ray diffraction (XRD) UV-visible spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), the $N_2$ adsorption-desorption isotherm measurement, and X-ray photoelectron spectroscopy (XPS). The $H_2$ was produced using the photolysis of MeOH. Using the Ni-$ATiO_3$ photocatalysts, $H_2$ production was higher than using the $ATiO_3$ photocatalysts. Especially, $273.84mmolg^{-1}$ $H_2$ was produced after 24 h reaction over the Ni-$SrTiO_3$. Also in the water (0.1 M KOH) with the Ni-$SrTiO_3$, $H_2$ production was $961.51mmolg^{-1}$ after 24 h reaction.

본 연구는 비 $TiO_2$ 계 광촉매 중 가장 널리 알려져 있는 $ATiO_3$ (A = Ca, Sr, Ba) perovskite를 sol-gel 법을 이용해 합성하였고, 골격치환이 용이한 점을 이용해 A site에 Ni을 첨가한 입자를 합성하였다. 합성한 $ATiO_3$와 Ni-$ATiO_3$ 입자의 불리화학적 특성은 X-선 회절분석(XRD), 자외선-가시선 분광광도계(UV-visible spectroscopy), 주사전자현미경 (SEM), 에너지분산형 분광분석법(EDS), 질소 등온 흡 탈착실험, X선 광전자분광법(XPS)을 이용해 확인하였다. 수소제조는 메탄올을 광분해하여 얻었으며, $ATiO_3$ 보다 Ni-$ATiO_3$ 촉매에서 높은 수소발생량을 나타내었다. 특히 Ni-$SrTiO_3$ 촉매를 사용하였을 때 24시간 반응 후 $273.84mmolg^{-1}$의 수소가 발생하였다. 또한 Ni-$SrTiO_3$ 촉매는 물(0.1 M KOH)을 분해하였을 때에도 높은 수소 제조 성능을 나타냈으며, 24시간 반응 후 $961.51mmolg^{-1}$의 수소가 발생한 것을 확인하였다.

Keywords

References

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