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Co3O4 nanowire arrays are fabricated by electrodeposition with following heat-treatment in atmosphere ambient. Photoluminescence is investigated at 295K. In the experiment, when increasing the excitation light wavelength from 260 nm to 360 nm, two kinds of emissions corresponding to the increasing excitation light wavelength are observed. One of them alters the excited emission position, another keeps its emission position. The distinct behaviour of excited emissions related to the increasing excitation wavelength indicates that the mechanism of them must be different. According to the experimental comparison and first-principle calculation, the two kinds of emissions are discussed. 相似文献
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流动注射在线萃取—火焰原子吸收光谱法测定钢样中痕量钴和镍 总被引:5,自引:0,他引:5
提出了一种流动注射成线萃取-火焰原子吸收光谱法测定钢样中痕量钴和镍的分析方法,研究了在线萃取流程中各项最佳参数,检出限钴为0.010μg.ml^-1镍为0.021μg.ml^-1,分析速度为20~30次.h^-1。经钢标准样品分析验证结果可靠。 相似文献
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溶剂萃取非水介质氢化物发生-无色散原子荧光光谱法测定痕量锑 总被引:1,自引:0,他引:1
本文提出了用乙醇作为NaBH_4的溶剂,APDC-MIBK萃取,有机相氢化物发生原子荧光光谱法测定水样中痕量锑的新方法。与已报道的二甲基甲酰胺(DMF)作为NaBH_4的溶剂相比较,乙醇具有价廉、无毒性以及荧光背景小和可以在较低酸度下发生氢化物的特点。对非水介质氢化物发生法的推广应用具有一定的实用价值。 相似文献
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Abnormal Photoluminescence Properties of Polycrystalline ZnO Nanowire Arrays Synthesized by Electrodeposition 下载免费PDF全文
Large-scale ZnO nanowire arrays are synthesized by electrodeposition with subsequent heat treatment in atmosphere ambient at 450-650℃. Photoluminescence (PL) is investigated at 295K. Abnormal PL properties of an unusual sharp emission at 485 nm and a broad ultraviolet emission which are different from the other works of ZnO PL before are observed. Field emission scanning electronic microscopy and transmission electron microscopy results show that the length of Zn 0 nanowires is nearly 5μm and their diameter is about 70 nm. X-ray diffraction and electron diffraction results reveal that the ZnO nanowires are a polycrystalline structure. 相似文献
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