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采用水热合成法,制备了4种不同晶型(α、β、γ、δ)的MnO_2纳米线.以邻苯二胺(OPD)为底物分子,系统地研究了不同晶型MnO_2纳米线的催化生荧反应.采用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线粉末衍射(XRD)、光电子能谱(XPS)、核磁共振、质谱和电化学方法等实验手段进行表征研究.实验结果表明,β-MnO_2纳米线对OPD的催化生荧反应为最佳.在此研究的基础上,借助甲醛的.CHO基团和OPD的.NH_2基团可发生缩合反应形成Schiff碱的性质,进一步构建了一种新型、高选择性、灵敏的催化荧光传感体系,并用于食品中甲醛的检测研究.
Four kinds of MnO 2 nanowires with different crystal forms (α, β, γ, δ) were prepared by hydrothermal synthesis method. O-phenylenediamine (OPD) .Firstly, the catalytic reaction was studied by means of TEM, SEM, XRD, XPS, NMR, MS and electrochemical methods The experimental results show that the β-MnO 2 nanowires are the best for the catalytic catalysis of OPD.In this study, with the help of formaldehyde.CHO groups and OPD.NH_2 groups can occur condensation reaction Schiff base Nature, to further build a new, highly selective and sensitive catalytic fluorescence sensor system, and for the detection of formaldehyde in food research.