【摘要】 合成了一种新型金纳米脐橙材料,研究了该材料对4-硝基苯酚及4-硝基苯硫酚的催化还原性能,借助表面增强拉曼光谱(SERS),探讨了金纳米脐橙中"大球"作SERS基底,"小球"作为硝基酚催化还原反应活性位点的可行性。同时也考察了金纳米脐橙粒子的浓度、形状、催化位点和底物结合方式对催化反应的影响。结果表明,所合成的金纳米脐橙作为一种高粒径比的纳米材料,不仅具有高效催化和SERS原位表征的功能,而且制备方法简单,复现性高,催化位点个数可控,为SERS原位表征贵金属催化反应提供了一种优质的潜在基底。更多还原

【Abstract】 A novel "dual-function" symbiotic double-sphere nano navel orange material was designed.The catalytic properties of the material for 4-nitrophenol and 4-nitrothiophenol were studied.By means of surface-enhanced Raman spectroscopy(SERS) characterization technique,the feasibility of "big ball" in the nano navel orange as SERS substrate and "small ball" as catalyst was discussed.The effects of the concentration,shape,catalytic site,and substrate binding mode on the catalytic reaction were also investigated.The results show that the nano navel orange has high-catalytic catalysis and SERS in-situ characterization as a high-particle size nanomaterial.The preparation method is simple,the reproducibility is high,and the number of catalytic sites is controllable,which provides a detection probe and means for high-efficiency catalysis and SERS in situ characterization.更多还原