Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao, East Road, Taipei 106, Taiwan, ROC.
Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao, East Road, Taipei 106, Taiwan, ROC.
J Photochem Photobiol B. 2017 May;170:164-172. doi: 10.1016/j.jphotobiol.2017.03.018. Epub 2017 Mar 28.
In the present study, sphere-like silver nanoparticles (Ag-NPs) were synthesized by using Camellia japonica leaf extract and its remediation industrial pollutants such as nitrobenzene and Eosin-Y (EY). As-prepared sphere-like Ag-NPs were characterized by various analytical and spectroscopic methods such as UV-visible spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), High-resolution transmission electron microscopy (HR-TEM), Energy dispersive X-ray spectra (EDX), and the chemical constituents of the leaf extract were also analyzed by using Gas chromatography and Mass Spectroscopy (GC-MS). Fascinatingly, the as-prepared sphere-like Ag-NPs exhibits excellent electrocatalytic and photocatalytic activity for the reduction of nitrobenzene and photo-degradation of EY dye respectively. The Cyclic voltammetry (CV) and amperometric (i-t) studies realized that the electrochemical behavior of sphere-like Ag-NPs modified electrode on nitrobenzene reduction. The proposed nitrobenzene sensor exhibited appreciable wide linear response range and low detection limit of 0.05-21μM, 23-2593μM and 12nM, respectively. The Ag-NPs modified electrode showed excellent selectivity towards the nitrobenzene detection even in the presence of common metal ions and nitroaromatic containing substances. On the other hand, Ag-NPs have excellent photocatalytic activity with >97% degradation of EY dye after irradiated 60min. These results indicated that the growth of sphere-like Ag-NPs should be a proficient.
在本研究中，通过使用山茶花叶提取物及其修复工业污染物（如硝基苯和曙红 Y）合成了球形银纳米粒子（Ag-NPs）。所制备的球形 Ag-NPs 通过各种分析和光谱方法进行了表征，例如紫外可见光谱、X 射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、高分辨率透射电子显微镜（HR-TEM）、能量色散 X 射线光谱（EDX），并且还使用气相色谱和质谱（GC-MS）分析了叶提取物的化学组成。有趣的是，所制备的球形 Ag-NPs 分别表现出对硝基苯还原和曙红 Y 光降解的优异电催化和光催化活性。循环伏安法（CV）和安培（i-t）研究实现了对硝基苯还原的球形 Ag-NPs 修饰电极的电化学行为。所提出的硝基苯传感器表现出令人满意的宽线性响应范围和低检测限，分别为 0.05-21μM、23-2593μM 和 12nM。Ag-NPs 修饰电极对硝基苯检测具有出色的选择性，即使在存在常见金属离子和含硝基芳烃的物质的情况下也是如此。另一方面，Ag-NPs 具有出色的光催化活性，在照射 60min 后，曙红 Y 染料的降解率超过 97%。这些结果表明，球形 Ag-NPs 的生长应该是高效的。
