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对镍掺杂的TiO2进行了化学态分析.采用溶胶-凝胶法制备5mo1; Ni掺杂TiO2粉末,利用X射线衍射仪(XRD)、透射电子显微镜(TEM)、扫描透射式电子显微镜(STEM)、X射线光电子能谱仪(XPS)、傅里叶变换红外光谱仪(FT-IR)、傅里叶变换拉曼光谱仪(FT-Raman)和紫外-可见分光光度计(UV-Vis)来对样品的相变过程和化学态进行分析.结果表明:掺杂Ni抑制了TiO2的相转变和晶粒长大,并拓宽了TiO2的可见光谱吸收范围.随着加热温度的升高,Ni掺杂TiO2的晶格氧峰增强而吸附氧峰降低,同时Ti2p3/2结合能减小. 相似文献
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The photochemical reaction of aromatic amines in the presence of aliphatic halides and molecular oxygen were studied. There is a very obvious structural effect of amines on the photoreactions, and the purple products, formed only in the tertiary aromatic amines system, were proved to be amiuium radical salts, e. g. CH_3—(CH_3)_2Cl-by moans of UV, NMR and ESR spectroscopies electronic conductivity and chemical analysis. The purple product can oxidize the adrenaline to adrenochrome. The mechanism of the photoreaction and the oxidation were discussed. 相似文献
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分子氧可以作为电子受体与很多有机化合物形成接触电荷转移复合物(CCT),从而在长波处产生新的具有最大吸收峰的CCT光谱。本文采用比较法测定了醚类、醇类,胺类、烃类等三十多种有机化合物的CCT光谱。推导了从CCT光谱计算有机化合物电离势的经验公式,并由此计算了上述三十多种有机化合物的电离势。 相似文献
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The structural and luminescence properties of nanocrystalline ZrO2 :Er^3+ films are reported. Transparent nano-ZrO2 crystalline films doped with Er^3+ have been prepared using a wet chemistry process. An intense roomtemperature emission at 1527nm with a full width at half-maximum of 46 nm has been observed, which is assigned to the ^4Ⅰ13/2 → ^4Ⅰ15/2 intra-4f^n electric transition of Er^3+. Correlations between the luminescence properties and structures of the nanocrystalline ZrO2 :Er^3+ films have been investigated. Infrared-to-visible upconversion occurs simultaneously upon excitation of a commercially available 980-nm laser diode and the involved mechanisms have also been explained. The results indicate that the nanocrystalline ZrO2:Er^3+ films might be suggested as promising materials for achieving broadband Er^3+-doped waveguide amplifiers and upconversion waveguide lasers. 相似文献
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N,N-二甲基对甲基苯胺(DMT)是一个典型的电子给体,可以和多种电子受体形成称之为CCT(Contact Charge Transfer)的络合物。在光照条件下,这种络合物可以生成离子自由基,从而引起一系列反应。 相似文献
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