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Science china chemistry 2009年第12期52卷 2148-2155页

作者： WANG ChengLin1,SUN Lan1,XIE KunPeng1 & LIN ChangJian1,2 1 Department of chemistry,College of chemistry and Chemical Engineering,xiamen university,xiamen 361005,china 2 state key laboratory of physical chemistry of solid surfaces,xiamen university,xiamen 361005,china 1. Department of chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China 2. state key laboratory of physical chemistry of solid surfaces Xiamen University Xiamen 361005 China

A constant current electrochemical deposition was employed to incorporate CdS nanoparticles into the TiO2 nanotube arrays (TiO2NTs). The size and amount of CdS nanoparticles in TiO2NTs (CdS@TiO2NTs) were controllable via modulating current,deposition time and electrolyte concentration. It was revealed,from the scanning electron microscopy (SEM) images and X-ray photoelectron spectroscopy (XPS) in depth profile,that CdS nanoparticles were filled into TiO2 nanotubes. A shift of the absorption edge toward the visible region under the optimal electrodeposition condition was observed with the diffuse reflectance spectroscopy (DRS). A 5-fold enhancement in the photocurrent spectrum for TiO2NTs was observed and the photocurrent response range was significantly extended into the visible region because of the CdS incorporation. Compared with pure TiO2NTs,under a visible light irradiation,CdS@TiO2NTs exhibited a 3.5-fold improvement of photocatalytic activity,which was demonstrated by the photocatalytic decomposition of Rhodamine B (RhB).

关键词： TiO2 nanotube CdS photocatalysis RhB

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LiAl中空位形成能的第一原理计算

物理学报 2003年第9期52卷 2229-2234页

作者：陈丽娟侯柱锋朱梓忠杨勇厦门大学物理系厦门361005 厦门大学固体表面物理化学国家重点实验室厦门361005

LiAl是一种非常典型和有重要用途的金属间化合物 .采用平面波展开和第一原理赝势法 ,计算了LiAl化合物中Li空位和Al空位的形成能和空位周围的原子弛豫 ,讨论了空位形成时电荷密度的重新分布。

关键词： LiAl 锂铝合金空位形成能第一原理计算原子弛豫电荷密度能带结构电子态密度

Quantum Chemical Studies of Surface-Enhanced Raman Spectra of Molecules Adsorbed on Nanogap Sites between Metal Nanoelectrodes

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Quantum Chemical Studies of Surface-Enhanced Raman Spectra o...

Pt电极上Sb,S吸附原子对正丁醇电催化氧化性能的影响

第三十五届国际光谱会议

作者： D.Y.Wu~(1*) X.M.Liu~1 J.C.Zhou~1 S.Duan~1 B.Ren~2 Z.Q.Tian~(2*) 1 Department of chemistry,College of chemistry and Chemical Engineering,xiamen university,xiamen 361005,china 2 state key laboratory of physical chemistry of solid surfaces,xiamen university,xiamen 361005,china

Surface-enhanced Raman spectroscopy (SERS) can be applied to obtain the information of molecules at the gap of nanoelectrode pairs [1～2].But there are a number of difficulties to clearly correlate SERS spectra with microscopic molecular *** main reason is that it is difficult to characterize unambiguously the gap structures and that the influence of the binding interaction on SERS signals of the probe molecules is still *** to the surface selection rule,the electromagnetic enhancement will

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来源： cnki会议评论

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燃料化学学报 2003年第4期31卷 367-371页

作者：林珩陈声培卢江红陈国良漳州师范学院化学系福建漳州363000 厦门大学化学系固体表面物理化学国家重点实验室福建厦门361005

运用电化学循环伏安和石英晶体微天平研究了0 1mol/LH2SO4溶液中正丁醇(1 BL)在Pt电极和以Sb,S吸附原子修饰的Pt(Pt/Sbad和Pt/Sad)电极上电催化氧化过程。从电极表面质量变化表明正丁醇的氧化与电极表面氧物种有着极其密切的关系。Pt电... 详细信息

运用电化学循环伏安和石英晶体微天平研究了0 1mol/LH2SO4溶液中正丁醇(1 BL)在Pt电极和以Sb,S吸附原子修饰的Pt(Pt/Sbad和Pt/Sad)电极上电催化氧化过程。从电极表面质量变化表明正丁醇的氧化与电极表面氧物种有着极其密切的关系。Pt电极表面Sb吸附原子能在较低的电位下吸附氧,可显著提高正丁醇电催化氧化活性。与Pt电极相比较,Sb吸附原子修饰的Pt电极使正丁醇氧化的峰电位负移了0 33V,峰电流增大了近一倍。相反,Pt电极表面S吸附原子的氧化会消耗表面氧物种,抑制了正丁醇的电氧化。本文从表面质量变化提供了吸附原子电催化作用的新数据。

关键词：石英晶体微天平铂电极修饰电极正丁醇电催化氧化

低碳烷烃选择氧化反应中催化剂动态结构研究进展

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天然气化工—C1化学与化工 2002年第6期27卷 38-41页

作者：张昕万惠霖翁维正伊小东清华大学一碳化学与化工国家重点实验室北京100084 厦门大学固体表面物理化学国家重点实验室厦门361005

考察低碳烷烃选择氧化反应中氧化物催化剂的动态结构 ,对于准确揭示反应条件下催化剂的构效关系 ,设计高效催化剂具有重要意义。本文综述了近年来低碳烷烃选择氧化反应中氧化物催化剂动态结构的研究进展。

关键词：低碳烷烃选择氧化反应动态结构氧化物催化剂原位表征

内表面栅极等离子体源离子注入TiN薄膜及其特性研究

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物理学报 2003年第9期52卷 2213-2218页

作者：张谷令王久丽杨武保范松华刘赤子杨思泽中国科学院物理研究所北京100080

阐述了栅极增强等离子体源离子注入 (GEPSII)方法的基本思想 .利用GEPSII方法在 4 5号钢基底上生成了金黄色氮化钛 (TiNx)膜 .对不同条件下的TiN膜做电化学腐蚀 ,XPS ,AES ,XRD等分析 .电化学腐蚀实验显示TiN薄膜改善了 4 5号钢的耐腐... 详细信息

阐述了栅极增强等离子体源离子注入 (GEPSII)方法的基本思想 .利用GEPSII方法在 4 5号钢基底上生成了金黄色氮化钛 (TiNx)膜 .对不同条件下的TiN膜做电化学腐蚀 ,XPS ,AES ,XRD等分析 .电化学腐蚀实验显示TiN薄膜改善了 4 5号钢的耐腐蚀性能 5— 10倍 ,且在高气压下效果更好 .结构分析显示TiN膜含有TiO2 ,TiN成分 ,主要沿( 111)和 ( 2 0 0 )晶向生长 ,深度分析显示膜的厚度只有二十几纳米。

关键词：腐蚀栅极增强等离子体源离子注入 TiN薄膜氮化钛薄膜 GEPSⅡ 45号钢内表面处理

CHOLESTERIC LIQUID CRYSTALLINE CHARACTER ON THE SURFACE OF CHITOSAN/POLYACRYLIC ACID COMPOSITES

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Chinese Journal of Polymer Science 2001年第3期19卷 247-253页

作者： Yan-ming Dong Yu-song Wu Mian Wang Department of Materials Science & state key laboratory for physical chemistry of solid surfaces, xiamen university xiamen 361005, china xiamen Univ Dept Mat Sci Xiamen 361005 Peoples R China xiamen Univ State Key Lab Phys Chem Solid Surfaces Xiamen 361005 Peoples R China

The cholesteric liquid crystalline structure in chitosan/polyacrylic acid composite films was studied by surface techniques. A periodical lamellar-like structure was observed in the permanganic acid etched film surface by both scanning electron microscopy (SEM) and atomic force microscopy (AFM), instead of the thumb-print texture which can be detected with polarized optical microscopy. It is suggested that the periodical lamellar-like structure is induced by the etching selectivity between cholesteric layers due to different molecular arrangement on the film surface. Four kinds of perpendicular disclinations, i.e. chi --> tau (-) + lambda (+), chi --> lambda (-) + tau (+), chi --> tau (-) + tau (+) and chi --> lambda (-) + lambda (+) were found in the composite films from SEM observations. The smallest periodicity of lamellar-like structure (equals to half pitch) is 20 similar to 40 nm measured with AFM.

关键词： chitosan cholesteric order liquid crystalline fingerprint texture lamellar structure SEM AFM

A simple solvothermal route towards the morphological control of ZnO and tuning of its optical and photocatalytic properties

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Science china chemistry 2010年第8期53卷 1711-1717页

作者： JIANG YaQi,LI FangFang,SUN Ran,XIE ZhaoXiong & ZHENG LanSun state key laboratory for physical chemistry of solid surfaces Department of chemistry,College of chemistry and Chemical Engineering,xiamen university,xiamen 361005,china 1. state key laboratory for physical chemistry of solid surfaces Department of chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

ZnO nanoparticles with different morphologies were solvothermally synthesized by controlling the alkali (sodium hydroxide) concentration in an isopropanol *** products were characterized by means of powder X-ray diffraction,UV-visible absorption spectra,scanning electron microscopy,transmission electron microscopy,and selected area electron *** morphologies of the formed ZnO nanocrystals were dependent on the concentration of the alkali,and with increases of sodium hydroxide concentration,the ZnO nanocrystals evolved from rod to hexagonal bipyramid,and then to a flower-like *** flower-like nanostructure resulted from the etching of the hexagonal bipyramid by the excess *** photoluminescence and photocatalytic properties of the prepared ZnO were *** difference of green emission among the ZnO nanocrystals indicated that a higher sodium hydroxide concentration led to a higher level of *** size,the surface structure and defects in the ZnO nanocrystals affected its photo-degradation characteristics.

关键词： zinc oxide solvothermal method nanocrystal photoluminescence photocatalysis

An Ab Initio Study of N_2O Decomposition on MgO Catalyst

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Chinese Chemical Letters 1998年第6期9卷 583-586页

作者： Xin LU Xin XU Nan Qin WANG and Qian Er ZHANG(state key laboratory for physical chemistry of solid surfaces, Institute of physical chemistry,Department of chemistry, xiamen university, xiamen 361005) xiamen Univ Dept Chem State Key Lab Phys Chem Solid Surfaces Inst Chem Phys Xiamen 361005 Peoples R China

Ab initio calculations based on density functional theory have been used to study thedecompsition of N_2O on MgO. The reaction is predicted to occur on O_3c and O_(4c) atoms, but not onO_(5c) atoms, with an activation barrier of 25-27 kcal/mol, in agreement with the experimental valueof 35 kcal/mol. Natural bond orbital analysis shows that the reaction leaves O ad-atoms on thosesurface O anions to form a peroxide-like 'O^2_(2-)' species. The )O-O bond stretching frequency ispredicted to be in the range from 820 cm(-1) to 825 cm(-1).

关键词： Ab initio calculation N_2O decomposition MgO catalyst

SYNTHESIS OF POLYCATECHOL WITH ELECTROCHEMICAL ACTIVITY AND ITS PROPERTIES

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Chinese Journal of Polymer Science 2002年第6期20卷 517-524页

作者： Yong Kong Shao-lin Mu Bing-wei Mao Department of chemistry School of Sciences, Yangzhou university Yangzhou 225002, china state key laboratory of physical chemistry of the solid Surface, xiamen university,xiamen 361005, china Yangzhou Univ Sch Sci Dept Chem Yangzhou 225002 Peoples R China xiamen Univ State Key Lab Phys Chem Solid Surface Xiamen 361005 Peoples R China

The electrochemical polymerization of catechol on platinum has been carried out using repeated potential cycling between -0.2 and 1.1 V (versus SCE). The electrolytic solution consisted of 0.2 mol dm(-3) catechol, 0.5 mol dm(-3) NaCl and 0.1 mol dm(-3) Na2HPO4 with pH 8.72. Catechol can not be polymerized at pH greater than or equal to 10.12. Polycatechol has an electrochemical lactivity at pH less than or equal to 4. The anodic and cathodic peak potentials of polycatechol shift towards more negative values as the pH of the solution increases from 1 to 4. The electrochemical activity of polycatechol hardly changes in this pH region, but it decreases slowly with time. This is caused by oxygen in air, which leads to an irreversible oxidation of polycatechol. This property is favorable for protecting metals from corrosion. Raman and FTIR spectra of polycatechol and catechol are quite different. AFM images of polycatechol films provide evidence that the image of the oxidized state of polycatechol is markedly different from that of the reduced one. This difference is caused by doping and dedoping of polycatechol.

关键词： catechol polycatechol electrochemical activity Raman spectra FTIR spectra AFM images