e) Eu的3d3/2和3d5/2 XPS峰。 图2. a) 室温下的PL和PLE光谱。b) 在不同Sr2+含量下,Li2Ca1-xSrxSiO4: Eu2+ (x = 0–1)的PL光谱颜色图。c) 在不同Ba2+含量下,Li2Sr1-xBaxSiO4: Eu2+ (x = 0–1)的PL...
XPS analysis and luminescence mechanism of white SrZn2(PO4)(2):Eu2+,Mn2+ phosphor with In3+ sensitizerBinding energyEnergy transferTrapPhosphorThe influence of In3+ doping on the binding energy of ions and the energy transfer mechanism of white SrZn2(PO4)(2):Eu2+,Mn2+ phosphor was ...
利用原位NAP-XPS技术系统地研究了Au / Ce 0.80 Eu 0.20 O 2催化剂中Eu 3+ →Eu 2+和Ce 4+ →Ce 3+的还原。首次证明了在温度≥400°C的氢气气氛中,二氧化铈中Eu 3+ →Eu 2+的还原。研究了Ce 0.80 Eu 0.20 O 2载体的还原对Au纳米颗粒在CO氧化中催化活性的影响。
Efficient energy transfer was demonstrated in the SrF2: Eu2+, Pr3+phosphor synthesized by the co-precipitation method. Results obtained with X-ray diffraction (XRD), scanning electron microscopy (SEM), x-ray spectroscopy (XPS), photoluminescence (PL) and decay curves proposed the UV-Vis energy ...
摘要：采用高温固相法，通过控制反应温度和Eu3+掺杂量，制备BaAl2O4: Eu直接白色荧光粉。以电荷补偿模型为基础讨论了自还原机理。当合成温度为1200℃、Eu3+掺杂量为12%(摩尔分数)时，荧光粉颜色趋近于白光，色坐标位于(0.36，0.38)。通过X射线光电子能谱、发射和激发光谱以及漫反射光谱，研究了BaAl2O4: Eu...
From the ESR and the XPS analyses, it is noted that spectral intensity of Eu2+ ion somewhat increased. It was believed that due to charge balance Eu3+ ions reduced to Eu2+ ions during the baking process in air. It is clear that the concentration of Eu2+ increased after the baking ...
Moreover, a shorter photoluminescence lifetime and red shift of 9 nm for emission peak can be also found for the CASN-AP and CASN-HP phosphors, which is ascribed to the increased Si-N bonds and surface Si/N ratio (1.86) demonstrated by the XPS analysis. Moreover, the quantum yield ...
In combination with the results from X-ray photoelectron spectroscopy (XPS) and infrared (IR) spectroscopy, the elemental distribution of the phosphor materials found from secondary-ion mass spectrometry (SIMS) directly indicates that the N3– ions are partially substituted for O2– ions into the ...
3.2. XPS Spectra of Eu-Doped ZnWO4 Nanoplates Ionic Eu is a well-known mixed-valence material whose valence state can be either Eu3+ or Eu2+ in various chemical environments [41,51,52]. Therefore, it is essential to examine the chemical states of Eu ions in ZnWO4 nanoplates. Figure ...
XPS测试表明,在氧气中合成的BaCuO2.5的Cu2p3/2电子结合能比CuO的高约1.1eV.XRD分析表明,BaCuO2.5在高温(920℃)下加热后分解成BaCuO2.由此推测高温超导体中难以存在Cu3... 赵良仲,胡玉秀,徐翠英,... - 《低温与超导》 被引量: 2发表: 1992年 Sr_(2)LiSiO_(4)F的晶格位点工程调控实现混合价态Eu^(...