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1、XPS在材料结构研究中的应用氧化钨电致变色薄膜的 XPS 分析Photochemical Synthesis of Au Core Pt Shell Nanoparticles in Citrate Solution System ZnO/Ag micro/nanospheres with enhanced photocatalytic and antibacterial properties synthesized by a novel continuous synthesis method 目录氧化钨电致变色薄膜的 XPS 分析Photochemical Synthesis of Au C
2、ore Pt Shell Nanoparticles in Citrate Solution System ZnO/Ag micro/nanospheres with enhanced photocatalytic and antibacterial properties synthesized by a novel continuous synthesis method 一、氧化钨电致变色薄膜的 XPS 分析文献出处：Faughnan等人认为：注入电子被局域于某一W5+离子上，并进入其5d轨道，注入的正离子M5+也驻留在此区域以保持电中性，从而形成MxWO3由于W5+离子与W6+离子混价共存
3、并分处2个能级上，则发生电子的能级跃迁效应而产生电电致致变变色色现现象象。一、氧化钨电致变色薄膜的 XPS 分析氧化钨图片展示隔热涂料专用纳米氧化钨 电致变色三氧化钨氧化钨相关知识介绍氧化钨颜色及钨氧比：WO3（黄色三氧化钨，黄钨），WO2.9（蓝色氧化钨，兰钨），WO2.72（紫色氧化钨，紫钨），WO2（褐色二氧化钨）氧化钨应用：1.气敏、催化油漆是光催化；2.太阳能感光薄膜；3.高级颜料，油彩水彩；4.X射线屏蔽及防火织物；5.掺钨改性材料掺杂用；6.气体传感材料；7.石油化工的出催化或辅助催化剂。加氢脱氢、氧化、烃类异构化、烷基化等许多反应具有良好的催化性能，是石油化工等常用的催化剂。对
4、比O和W元素峰型变化 实验采用了 ITO 薄膜作为电极，因而导致了全谱图中出现了 In、Sn。而着、退色态中的 Cl 是由液态电解质 LiClO4-乙腈溶液引入的。在研究过程中忽略污染引入的元素，主要讨论各状态下 W、O 元素的变化：对比原始态和着色态的图谱，发现着色态中 O1s、O(KLL)峰均显著增高，着色态 O 元素的的化合环境有了很大的变化，W4p 峰也有所增高，而 W4f 峰稍有下降 着色态和退色态的图谱可以看出，W4f 峰明显增高，W4p、W4d 峰也稍有增高，这可能是 W 元素的价态发生变化引起的。W6+W5+W6+从图 2a 可以看出，着色态的 WOx 膜的钨离子谱线是多峰重叠
5、，其中曲线 a1 的主峰位 35.43 eV，肩峰位 37.66 eV，属 WOx 离子化合物中 W6+离子谱峰特性，对应于 W6+的 4f7/2 和 4f5/2 峰，计算可知占 W 元素含量的 58.49；曲线 b2 的主峰位为 34.9 eV，肩峰位为 36.74 eV，属 WOx 离子化合物中 W5+离子谱峰特性，对应于 W5+的 4f7/2 和 4f5/2 峰,计算可知占 W 元素含量的 41.51%.图 2b 中退色态的主峰位为 35.83 eV，肩峰位为 37.92 eV，属 WO3离子化合物中 W6+离子的 W4f7/2 和 W4f5/2 峰。钨其他价态氧化物中的O氧离子及水合离
6、子中的Ols峰WO3化合物中的O2-离子 图3示出了WOx薄膜着、退色状薄膜着、退色状态态下下O2-离子的离子的结结合状合状态态。对图3a的低能峰位校准后，其值为530.5 eV，亦属WO3物相中的O2-氧离子特征，而高能端的主峰值为532.5 eV，其特性与钨其他价态氧化物中的O2氧离子及水合离子中的Ols峰相对应；对图3b的主峰校准后，其峰位为530.6 eV，属WO3化合物中的O2-离子。O2-离子的离子的这这种化学种化学峰位的峰位的变变化与着、退色化与着、退色态态中中W元素价元素价态变态变化是一化是一致的。致的。Photochemical Synthesis of Au Core Pt
7、 Shell Nanoparticles in Citrate Solution System 文献出处：Photochemical Synthesis of Au Core Pt Shell Nanoparticles in Citrate Solution System 在柠檬酸盐溶液体系中金核铂壳纳米粒子的光化学合成 目的：利用 X 射线光电子能谱(XPS)分析了复合纳米粒子的表面化学态和它们的结构，证实形成的 AuPt 纳米粒子为核-壳结构结结果果证证明明均均为为金金核核铂铂壳壳结结构构 XPS is an important surface analysis technique.Fo
8、r core-shell nanoparticles,it can provide essential information of surface atomic concentration and a strong evidence of existing core-shell structure.Using XPS analysis technique,the AuPt composite nanoparticles prepared by two ways were characterized in the case of 1:1 molar ratio of Au:Pt,as show
9、n in Fig.3.It can be seen that the XPS spectra of the composite particles synthesized by the coreduction and the seed growth method were very similar.Based on the analytical results,Pt:Au atomic ratios on both nanoparticle surfaces were 74.99:25.01 and 74.14:25.86,respectively.This ratio is larger t
10、han the Pt:Au molar ratio (1:1)in the colloidal preparation.Obviously,the synthetic double-metal composite nanoparticles have the Au core Pt shell structure.总结总结：金：铂原始摩尔比为1:1,外界环境保持不变，现在测试结果铂：金为74.99:25.01和74.14:25.86，由此可以看出是金核铂壳的结构。金核铂壳的结构。3、ZnO/Ag micro/nanospheres with enhanced photocatalytic and
11、 antibacterial properties synthesized by a novel continuous synthesis method 文献出处：实验示意图The XPS analysis was carried out to investigate the surface structure of the ZnO/Ag MNSs and the results are shown in using that of C 1s(284.8 eV).All peaks in the XPS full spectrum shown in Fig.6(a)can be ascribe
12、d to Zn,Ag,O,and C elements and no peaks of other elements were observed.The presence of C comes mainly from pump oil in the vacuum system of the XPS equipment.It is indicated that the ZnO/Ag MNSs is only composed of three elements Zn,O and Ag,which is consistent with the above XRD and EDS results.T
13、he high resolution spectra for Zn,O,and Ag species are shown in Fig.6bd,respectively.In Fig.6(b)and(c),the peaks proles are symmetric and center at 1021.2 and 530.1 eV,which are attributed to Zn 2P3/2 and O1s of ZnO specimen,respectively.37,38The Ag 3d5/2peak appears at a binding energy of 367.2 and
14、 the splitting of the 3d doublet is 6.05 eV,indicating the metallic nature of silver.39 Interestingly,the binding energies of Ag 3d5/2 and Ag 3d3/2 are 367.2 eV and 373.25 eV for the ZnO/Ag MNSs,which to the lower binding energy compared with the corresponding values of bulk Ag(the standard binding energies of Ag 3d5/2 and Ag 3d3/2 for bulk Ag are about 368.2 and 374.2 eV,37 respectively).This conrms the interaction between Ag and ZnO nanocrystals as the binding energy of monovalent Ag is known to be much lower than that of zerovalent Ag.Similar results were also found in Zhengs work 谢谢观赏