초박막 두께의 Nb-TiOx 나노시트 합성
The synthesis of ultrathin Nb-doped TiOx nanosheets
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초록
2차원 층상결정구조를 갖는 금속산화물 나노시트의 조성을 제어함으로써 재료 물성 및 응용의 확장이 가능하다. 본 연구에서 니오비움(Nb)이 도핑 된 타이타늄산화물(TiOy) 나노시트 합성에 성공함으로써 나노시트의 조성을 순수조성에서도핑조성으로 확장할 수 있었다. 상세하게는 출발 물질인 층상 구조 금속산화물 합성 시 도핑 조성을 설계(K0.8Ti1.73-xNbxLi0.27O4,x = 0, 0.03, 0.07)하고 고상 합성한 후 유기물처리를 통한 화학적 박리를 수행하였다. 이렇게 함으로써 니오비움이 도핑 된타이타늄산화물 초박막 나노시트를 수득할 수 있었다. 나노시트의 크기는 x-y 방향에서 긴 길이 기준으로 2 μm 이하였으며두께(z 방향)는 약 1 nm였다. 니오비움의 도핑 여부는 XRD 및 SEM-EDS 분석을 통해 확인할 수 있었다.
Abstract
By controlling the composition of the metal-oxide nanosheet having a two-dimensional layered crystal structure,material properties and application can be extended. In this study, the composition of the nanosheet could be expanded from pure composition to doping composition by successfully synthesizing the TiO2 nanosheet doped with Nb. Specifically, thedoping composition was designed when synthesizing the layered metal oxide as a starting material (K0.8Ti1.73-xNbxLi0.27O4,x = 0, 0.03, 0.07) and chemical exfoliation was performed. By doing this, it was possible to obtain the Nb-doped TiOy ultrathin nanosheet. The size of the nano sheet was 2 μm or less based on the long length in the x-y direction, and the thickness was about 1 nm. Nb-doping was confirmed by XRD and SEM-EDS analysis.
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