通过银纳米颗粒在SiO@α-FeO纳米复合材料上的表面等离子体效应制备用于CO氧化的高效可见光光催化剂。
The production of an efficient visible light photocatalyst for CO oxidation through the surface plasmonic effect of Ag nanoparticles on SiO@α-FeO nanocomposites.
作者信息
Uma Kasimayan, Chen Shih-Wen, Arjun Nadarajan, Pan Guan-Ting, Yang Thomas C-K
机构信息
Centre for Precision Analysis and Research Center, National Taipei University of Technology Taipei Taiwan 106.
Department of Chemical Engineering and Biotechnology, National Taipei University of Technology Taipei Taiwan 106
出版信息
RSC Adv. 2018 Apr 5;8(23):12547-12555. doi: 10.1039/c7ra13260c. eCollection 2018 Apr 3.
A process for the photo deposition of noble Ag nanoparticles on a core-shell structure of SiO@α-FeO nanocomposite spheres was performed to produce a CO photo oxidation catalyst. The structural analyses were carried out for samples produced using different Ag metal nanoparticle weight percentages on SiO@α-FeO nanocomposite spheres by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), UV-vis spectroscopy, Raman spectroscopy and Fourier transform infrared spectroscopy (FTIR). A computational study was also performed to confirm the existence of the synergic effect of surface plasmon resonance (SPR) for different weight percentages of Ag on the SiO@α-FeO nanocomposites. The mechanism for CO oxidation on the catalyst was explored using diffuse reflectance infrared Fourier transform spectroscopy (DRFIT). The CO oxidation results for the Ag (2 wt%)-SiO@α-FeO nanocomposite spheres showed 48% higher photocatalytic activity than α-FeO and SiO@α-FeO at stable temperature.
通过在SiO@α-FeO纳米复合球体的核壳结构上进行光沉积贵金属银纳米颗粒的过程来制备CO光氧化催化剂。使用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、紫外可见光谱、拉曼光谱和傅里叶变换红外光谱（FTIR）对在SiO@α-FeO纳米复合球体上使用不同银金属纳米颗粒重量百分比制备的样品进行结构分析。还进行了一项计算研究，以确认不同重量百分比的Ag对SiO@α-FeO纳米复合材料表面等离子体共振（SPR）协同效应的存在。使用漫反射红外傅里叶变换光谱（DRFIT）探索了催化剂上CO氧化的机理。Ag（2 wt%）-SiO@α-FeO纳米复合球体的CO氧化结果表明，在稳定温度下，其光催化活性比α-FeO和SiO@α-FeO高48%。
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