金纳米通道制备及催化性能研究

发布时间：2017-12-28 14:07

本文关键词：金纳米通道制备及催化性能研究　出处：《光谱学与光谱分析》2016年S1期 　论文类型：期刊论文

【摘要】：以聚碳酸酯超滤膜(PC膜)为模板,采用层-层自组装技术将聚乙烯亚胺(PEI)阳离子聚合物和柠檬酸根稳定的金纳米粒子(AuNPs)交替吸附在PC膜孔内制备了金纳米通道,并采用SEM对其进行了表征。以紫外-可见吸收光谱作为分析手段研究了金纳米通道对对硝基苯酚(4-NP)还原反应的催化性能。结果表明,金纳米通道具有良好的催化活性,催化效率随组装层数的增多出现先增大后降低的现象,PEI/AuNPs为三层时,金纳米通道具有较高的催化性能,且催化效率随4-NP+NaBH4混合溶液体系在金纳米通道内的流速增大而减小。
[Abstract]:Using polycarbonate ultrafiltration membrane (PC membrane) as template, the gold nanochannels were prepared by layer to layer self assembly technology, and the gold nanoparticles were alternately adsorbed on the PC membrane hole by alternating adsorption of polyethylenimine (PEI) cationic polymer and citric acid stabilized gold nanoparticles (AuNPs), and their appearance was characterized by SEM. The catalytic properties of the gold nano channel on the reduction of p-nitrophenol (4-NP) were studied by UV visible absorption spectroscopy. The results show that the gold nano channel has good catalytic activity, catalytic efficiency with increasing the number of the layers increase first and then decrease, PEI/AuNPs for the three layer, the catalytic performance of gold nano channel has high catalytic efficiency, and with 4-NP+NaBH4 mixed solution on gold nano channel velocity increases.
【作者单位】：西北大学化学与材料科学学院;
【基金】：陕西省自然科学基金项目(2014JM2050)资助
【分类号】：O643.36;TB383.1
【正文快照】： 金纳米通道的制备及表征结果:将PC膜放到膜过滤器里,与装有组装液的注射器连接好一并安置到注射泵上。利用注射泵控制流速,将10 mL 0.5 mg·L-1的PEI溶液以0.25mL·min-1的速度滤过装有PC膜的过滤器,再用10mL的超纯水以1mL·min-1的速度滤过,洗去与PC膜结合不牢固的PEI分子,用

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