Dharmaraj N, Kim C H, Kim K W, Kim H Y, Suh E K
Department of Chemistry, Government Arts College, Udumalpet 642 126, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2006 May 1;64(1):136-40. doi: 10.1016/j.saa.2005.07.007. Epub 2005 Aug 10.
Tin oxide nanofibres with 100-150 nm diameter has been prepared, for the first time by calcination of poly(vinyl acetate) (PVAc)/SnO2 composite fibres prepared by electrospinning method as precursor. Scanning electron microscopic images revealed cylindrical morphology of the fibres after calcination at 600 degrees C. Both, X-ray diffraction (XRD) and Raman spectral data confirmed the presence of phase pure tetragonal rutile tin oxide after calcination process. Room temperature photoluminescence (PL) spectra of tin oxide nanofibres under excitation at 325 nm wavelength show a strong green emission at 525 nm with a band gap of 2.41 eV. FT-IR spectra confirmed the formation of pure tin oxide after calcination at 600 degrees C and complete removal of PVAc during calcination. UV-vis spectrum of the fibres showed absorption at 315 nm due to the direct electron transfer in tin oxide.
首次通过煅烧由静电纺丝法制备的聚醋酸乙烯酯（PVAc）/SnO₂复合纤维作为前驱体，制备出了直径为100 - 150纳米的氧化锡纳米纤维。扫描电子显微镜图像显示，在600摄氏度煅烧后，纤维呈现出圆柱形形态。X射线衍射（XRD）和拉曼光谱数据均证实，煅烧过程后存在纯四方金红石相氧化锡。氧化锡纳米纤维在325纳米波长激发下的室温光致发光（PL）光谱显示，在525纳米处有强烈的绿色发射，带隙为2.41电子伏特。傅里叶变换红外光谱（FT - IR）证实，在600摄氏度煅烧后形成了纯氧化锡，并且在煅烧过程中PVAc被完全去除。纤维的紫外 - 可见光谱显示，由于氧化锡中的直接电子转移，在315纳米处有吸收。
