Tripathy Suraj Kumar, Jo Jin-Nyeong, Wu Xiao-Feng, Yoon Jeong-Mo, Yu Yeon-Tae
Division of Advanced Materials Engineering and Research Institute of Industrial Technology, College of Engineering, Chonbuk National University, Jeonju 561-756, South Korea.
J Nanosci Nanotechnol. 2011 Jan;11(1):453-7. doi: 10.1166/jnn.2011.3179.
A simple soft-chemical technique for processing of metal@SnO2 nanocomposites with core-shell morphology is reported. In the present technique metal nanoparticles are prepared by chemical reduction technique followed by deposition of tin dioxide. Thus a core-shell type structure is produced. The phase and morphology has been investigated by X-ray diffraction technique (XRD) and transmission electron microscopy (TEM). As prepared Au@SnO2 and Ag@SnO2 core-shell nanocomposites have shown distinct surface Plasmon band in the UV-visible spectrum at 540 nm and 400 nm respectively. The core-shell morphology is confirmed from the TEM images. XRD patterns have suggested the presence of noble metal and tin dioxide in the Cassiterite form. These metal@SnO2 nanocomposites have been successfully used for the photocatalytic oxidation of acetaldehyde. Our investigations suggest that presence of noble metal core in contact with tin dioxide shell enhances the photocatalytic activity of the material.
报道了一种用于制备具有核壳结构的金属@SnO₂纳米复合材料的简单软化学技术。在本技术中，通过化学还原技术制备金属纳米颗粒，随后沉积二氧化锡。由此产生了核壳型结构。通过X射线衍射技术（XRD）和透射电子显微镜（TEM）对其相和形态进行了研究。所制备的Au@SnO₂和Ag@SnO₂核壳纳米复合材料在紫外可见光谱中分别在540 nm和400 nm处显示出明显的表面等离子体带。从TEM图像证实了核壳形态。XRD图谱表明存在锡石形式的贵金属和二氧化锡。这些金属@SnO₂纳米复合材料已成功用于乙醛的光催化氧化。我们的研究表明，与二氧化锡壳接触的贵金属核的存在增强了材料的光催化活性。
