MoO3电致变色薄膜的XPS研究

Molybdenum oxide films were fabricated successfully by spin coating from Li＋ doped peroxo polymolybdate solution via sol gel technique.Their electrochemical and electrochromic properties were investigated by cyclic voltammetry and in situ UV transmittance measurements.The results showed that the films possessed excellent electrochemical stability and reversibility.The electrochromic mechanism of the MoO3 was discussed by using results obtained from X ray photoelectron spectroscopy (XPS).The results showed that the most part of the Mo6＋ in MoO3 film was reduced to Mo5＋ and Mo4＋ ions during the Li＋ intercalation process,Mo4＋ was oxidized to Mo5＋ and part of Mo5＋ was oxidized to Mo6＋ again during the Li＋ deintercalation process.So it was considered that Mo4＋ ions existed in the colored MoO3 films.     

X光电子能谱分析中光电子峰和俄歇峰的干扰及消除

X光电子能谱(XPS)在分析多元素材料时,光电子峰可能受到其它元素俄歇谱的干扰.在AlKα激发CrZnSi合金样品时,光电子峰Cr2p和俄歇峰ZnLMM相互干扰,而换用双阳极中的MgKα源激发,虽可消除此相互干扰,但样品表面的Cls和Nls又会受到ZnLMM干扰.类似地,AlKα激发的GaN样品中Nls受俄歇峰GaLMM的严重干扰,而换用MgKα源激发时,Cls峰又受到的GaLMM的干扰.交替使用Mg/Al双阳极激发源,可改变XPS分析中的俄歇谱及其背景对光电子峰的干扰位置,并用未受干扰的峰互相校正2组谱图能量位置,以对样品谱峰作出正确的分析.     

磁透镜引起的氯化银谱峰异常位移及其在X射线光电子能谱成象分析中的应用

用X射线光电子能谱（XPS）分析了与样品托有良好电接触的银片及其上面的AgCl。观察到在使用样品磁透镜和非单色化X射线源的实验条件下不导电的AgCl的电子峰产生异常大的谱峰位移,还发现这种异常谱峰位移可以应用于XPS成象分析,以提高化学位移很小的元素化学态（如Ag^0和Ag^ )的XPS象的分辨能力。     

Thermal Desorption of Covalently Bound Fullerene C60 from Poly-N-vinylpyrrolidone Films

Kinetics of formation of thermolysis products in heating of thin films of poly-N-vinylpyrrolidone and of poly-N-vinylpyrrolidone with covalently bound fullerene C₆₀ was studied by thermal desorption mass spectrometry.     

四卤合金属酸十六铵的光电子能谱研究

用ＡｌＫａ（ｈ＝１４８６．６ｅＶ）Ｘ－射线测量１５种四卤合金属酸十六铵的光电子能谱。讨论了这些化合物的Ｚｎ２ｐ、Ｃｏ２ｐ、Ｍｎ２ｐ、Ｃｄ３ｄ、Ｃｌ２ｐ、Ｂｒ３ｄ、Ｉ３ｄ、Ｎ１ｓ的芯能级结合能的化学位移。根据Ｐａｕｌｉｎｇ电负性讨论了这些数据和计算电荷的关系。     

Surface Layers on Chromium in Sulfuric Acid Solutions of Organic Substances: An X-ray Photoelectron Spectroscopy Study

Surface layers formed at a contact of chromium with sulfuric acid solutions containing some organic substances (sodium oxalate, dimethylformamide, methanol) are analyzed by the X-ray photoelectron spectroscopy method. The layers are shown to contain products of deep destruction of organic molecules, i.e. carbon species and those containing functional groups. The data obtained point to the electrocatalytic activity of chromium in cathodic processes. The results of this study may provide a deeper insight into the mechanism of carbon incorporation (in the form of carbide compounds as well) into amorphous chromium deposits formed in sulfuric acid baths containing some organic substances.     

Synthesis and Study of Carbon Sorbent Prepared from Polyethylene Terephthalate

The optimal conditions for preparing activated carbons from polyethylene terephthalate polymer wastes were determined. The pore structure and sorption properties of the resulting product were studied.     

双梳型共聚物在莠去津颗粒表面吸附的X射线光电子能谱分析

采用X射线光电子能谱(XPS)研究了双梳型共聚物吸附于莠去津颗粒样品表面的电子状态,计算了吸附厚度.结果表明:吸附后,莠去津颗粒界面的N 1s和Cl 2p谱峰强度明显减弱,Cl 2s几乎消失,而C 1s和O1s谱峰强度则明显增强,这主要是双梳型共聚物中C和O的贡献,且吸附后能在莠去津颗粒界面形成良好的吸附保护膜,其厚度...     

木材表面改性的XPS分析

利用微波等离子体对木材表面进行处理，并诱导引发接枝甲基丙烯酸甲酯；达到表面改性的效果以提高木质材料的性能，利用X射线光电子能谱(XPS)对木材表面改性前后的表面化学结构进行分析；结果表明：木材经微波等离子体处理，表面氧与碳的原子浓度比(no／nc)增加，产生大量的含氧官能团或过氧化物，从而引发木材与甲基丙烯甲酯单体产生接枝共聚反应。     

Study of the Evolution of Carbon Dioxide from Active Carbon by a Threshold Temperature-Programmed Desorption Method

A particular Temperature-Programmed Desorption (TPD) method, called ‘Intermittent TPD’, has been applied to the decomposition of oxygen groups naturally present at the surface of a microporous active carbon. It is shown that this method provides more information on the kinetics of the thermal decomposition of these species than the classical TPD technique. The main result is that the decomposition of these oxygen groups occurs in at least 7 distinct stages which have been characterized by their apparent activation energy and the corresponding frequency factor. The present study underlines the usefulness of ITPD for studying the rate of desorption of gases from powdered samples with a strongly heterogeneous surface. This revised version was published online in July 2006 with corrections to the Cover Date.     

Photoelectron Spectroscopic Study of Methanol Adsorbed Rutile TiO2(110) Surface

Methanol/TiO₂(110) is a model system in the surface science study of photocatalysis where methanol is taken as a hole capture. However, the highest occupied molecular orbital of adsorbed methanol lies below the valence band maximum of TiO₂, preventing the hole transfer. To study the level alignment of this system, electronic structure of methanol covered TiO₂(110) surface has been measured by ultraviolet photoelectron spectroscopy and the molecular orbitals of adsorbed methanol have been clearly identified. The results indicate the weak interaction between methanol and TiO₂ substrate. The static electronic structure also suggests the mismatch of the energy levels. These static experiments have been performed without band gap excitation which is the prerequisite of a photocatalytic process. Future study of the transient electronic structure using time-resolved UPS has also been discussed.     

气相存在下过渡金属表面脱附动力学机理的研究

作者利用同位素跳跃技术来探讨气相压强促进过渡金属表面吸附分子脱附这一新现象的机理。获得了３５３Ｋ下饱和吸附Ｃ１６Ｏ的Ｒｅ（０００１）表面的超高真空等温脱附和不同气相压强的同位素Ｃ１８Ｏ交换的谱图。从相对覆盖度及其对数随时间的变化曲线可以看出,真空等温脱附过程为一级动力学过程。而在气相同位素存在下交换脱附过程可用一级加二级来近似,拟合的结果与实验符合很好。作者还发现了交换速率远大于真空等温脱附速率,而且随压强的增加而增加,这说明气相压强直接促进了表面吸附分子的脱附。并提出了协同吸附－脱附机理来解释这一新现象     

有机锗化合物的光电子能谱研究

用Ｘ射线光电子能谱法（ＸＰＳ）研究了六种有机锗化合物的Ｇｅ３ｄ轨道结合能化学位移与锗所处不同化学环境的关系。结果表明，对Ｇｅ３ｄ轨道电子能化学位移有明显影响的关键取决于极性基团。     

样品表面污染对X射线光电子能谱定量分析的影响

用X射线光电子能谱(XPS)研究了表面碳污染物对样品的元素相对定量误差的影响。结果表明,样品表面含有碳污染物能引起光电子动能较低的元素的相对定量分析结果偏低,而且样品中两种元素的光电子动能差越大,相对误差越大。在用元素灵敏因子法进行XPS定量分析时,样品表面污染是不可忽略的误差来源。     

1,2,5-噻二唑衍生物电子结构的紫外光电子能谱研究

首次报导了１,２,５－噻二唑衍生物３－氯－１,２,５－噻二唑（Ａ）和３,４＝二氯－１,２,５－噻二唑（Ｂ）化合物的紫外光电子能谱（ＵＰＳ）,谱带的指认建筑在对谱带形状、相对强度、实验电离能（ＩＰＳ）的分析以对研究分子Ｇａｕｓｓｉａｎ ９４ＳＴ０－６Ｇ从头计算电离能（－ε１）。化合物Ｂ ＵＰＳ谱带的ＩＰＳ比相应的化合物Ａ的ＩＰＳ均你芝归结为Ｂ分子中两个取代Ｃ１原子上电子的拥挤效应。计算的Ｂ的 有量（     

RE—Al—Zr—C—N多元渗的XPS研究

用气相法对45钢表面进行RE－Al-Zr-C-N多元渗，通过X射线光电子能谱（XPS）给出了该体系中各元素的结合能位置，分析了它们的存在状态，同时用扫描电镜－能谱进行了形貌分析，元素分析等，证实RE，Al,Zr,C,N渗入到了金属表层，在共渗中发现微量稀土元素对铝的活化催渗作用大于其对锆的作用，进一步证实了对氮的作用亦优于对碳的活化催渗作用。     

CFCl3的理论和紫外光电子能谱研究

采用紫外光电子能谱(PES)和量子化学方法,研究了以CFCl3化合物为代表的系列化合物(CFCl3、CF2Cl2、CF3Cl、CCl4)不同离子态的电子结构和性质。结果表明,四种化合物CF3Cl、CF2Cl2、CFCl3、CCl4的第一电离能依次下降。结合从头算自洽场分子轨道(abinitioSCFMO)和外壳层格林函数法(OVGF)计算对化合物的PES进行了分析和指认,表明化合物的外层轨道中Cl的孤对电子成分对电离能存在明显的影响;外层格林函数法计算得到电离能与实验吻合很好;同时发现在外壳层格林函数法计算结果中由于考虑相关能,得到的分子轨道存在能级顺序的交错。     

Cleanup of Water Surface from Oil Spills Using Natural Sorbent Materials

The following indicators were used to compare sorption efficiency of the test objects: oil capacity (OC), buoyancy, solubility of hydrocarbons in water, and water absorption (WA). Hereby, it was determined that the peat moss carbonized at the temperature of 200-250°С and modified by acetic acid has high sorption capacity. The sorbents introduced can increase the efficiency of water surface cleaning up until the water is almost clean and the residual oil content in water is less than 0.03 g/l.