Earticle

초록

영어

In view of synthesizing a remarkably diverse range of inorganic materials using the precursor
available in the biosphere by biological system, the biomolecules were used to induce inorganic
materials under the ambient condition in these days.1) For example, by using the protein called
silaffins which was found in the cell wall of diatoms, both SiO2 and TiO2 were achieved in vitro. In Addition, biomolecules such as proteins and peptides can control the size, shape, chemistry, and crystal structure of the inorganic product, when they were used for materials synthesis.2) TiO2 is commonly used as photocatalyst as it is nontoxic, chemically stable, inexpensive, and highly efficient. However, it has relatively large band gap (~3.2 eV) which limits its use to the UV light region. By coupling the two semiconductors TiO2 and WO3, the reduction of band gap energy can be achieved, which allows the hybrid be used in the visible light region.In this research, biomimetic synthesis of both TiO2 and WO3 from their precursors (TiBALDH, Na2WO4) was done by harnessing a disulfide-bond constrained peptide (STB1 : -CHKKPSKSC-). STB1 can catalyze both TiO2 and WO3 nanoparticles in thermodynamically unfavorable condition. By combining the result of both synthesis, we synthesized the hybrid material of TiO2-WO3 from the mixture of two precurcors and ratio between Ti and W in hybrid material was examined. This hybrid metal oxide had potential to be used as novel type of photo-catalytic material. The effect of reaction condition such as pH, conductivity, reaction time, precursor concentration to TiO2 and WO3 formation was investigated in this research. The morphology of the inorganic material induced by peptide was clearly depended on the condition which was used. All the synthesized nanoparticles were subsequently quantified and characterized by scanning electron microscope (SEM); transmit electron microscope (TEM), energy dispersive spectrometer (EDS) and X-Ray diffraction (XRD). This research provides interesting insight of “bottom up” synthesis of hybrid metal oxide nanoparticles.

키워드

저자

• Jae Wook CHO [ Department of Chemical Engineering, Sungkyunkwan University ]
• Ming ZHANG [ Department of Chemical Engineering, Sungkyunkwan University ]
• Woo Seok CHOE [ Department of Chemical Engineering, Sungkyunkwan University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국생물공학회 학술대회

• 간기

  반년간

• 수록기간

  1985~2013

• 십진분류

  KDC 476 DDC 576