Special Issue: Photoelectrochemistry and New Types of Solar Cells Future Green Renewable Energy Resources

众所周知,能源与环境是当今人类面临的最大难题和挑战,随着世界能源需求的急剧攀升,传统化石资源的不断耗竭,全球温室效应和环境污染的压力日趋严重,发展各种可再生绿色能源成为当今世界最主要的共性问题和研究热点.太阳能光电转化技术被认为是一种最有希望真正解决未来社会可再生能源和洁净环境问题的先进技术.太阳可为人类提供取之不尽、用之不竭的巨大能源宝库,每年照射到地球的太阳能量高达174000 TW,换言之,只要能以10%效率转化0.1%到达地球表面的太阳能,即可满足全

PROGRESS IN THE STUDY ON PASSIVITY OF METALS AND SEMICONDUCTORS

简要介绍第 8届国际金属和半导体钝性研讨会概况 ,评述近年来国际上金属和半导体钝性研究的主要进展。The passivity is a common phenomenon for metals and semiconductors, and plays a vital role in the fields of materials science, electrochemistry, corrosion, semiconductor and many surface techniques. The passivity remains pivotal and challenging though it has been investigated for a century. The following research projects of passivity in high technologies have been focused in the present passivity studies: chemical composition, structure, electronic properties, growth mechanism, reaction activity, stability and breakdown, research methods, modification and application.国家自然科学基金(5 98710 43;;5 9910 2 10 5 2 7- 2 5 9-E0 1

第13届国际腐蚀大会简介

第13届国际腐蚀大会(13THInTErnATIOnAlCOrrOSIOnCOngrESS,简称ICC)于1996年11月25~29日在澳大利亚著名工业城市墨尔本举行。来自澳大利亚、美国、日本、英国、德国、新西兰、韩国、中国等48个国家和地区约600多位代表参加了会议。其中澳大利亚本国的代表占40%多,美国、日本代表各占6%,英国和新西兰代表约占2%。中国有23名代表参加了会议,并有10余篇论文在会上报告交流。大会共收到论文452篇,在会上交流的报告有300余篇。会议邀请6位国际著名专家作大会报告。这是三年一度世界范围的腐蚀科学和防护技术的交流和检阅。本届会议的主题为面向21世纪的腐蚀与防护,共分22个议题:1微生物影响的腐蚀(8篇);2.

Biocompatibility of hydroxyapatite nanoparticle coated on titanium surface

目的制备具有与自然骨类似表面性能的植体材料纳米羟基磷灰石[Ca10(PO4)6(OH)2,HAp]涂层/钛基复合材料。方法电泳沉积法(EPD)。为改善涂层与基体之间的结合,对钛表面进行了粗糙化和氧化处理。结果烧结前后,涂层成分没有发生变化,具有纳米结构,表面均匀无裂缝。体外干细胞培养试验结果表明,细胞在材料表面和周围生长良好,繁殖速度比钛和常规尺寸的HAp涂层快。结论纳米涂层具有均匀的纳米结构,表现出良好的生物相容性,有望用于设计骨科和齿科材料。Objective To get a bone-substitute material by coating hydroxyapatite nanoparticle on titanium surface.Methods Titanium surface was roughened and oxidized for improving the bonding strength between hydroxyapatite coating and titanium,then,hydroxyapatite nanoparticle were coated on titanium surface by electrophoretic deposition.Results The nanostructure and component of the coated hydroxyapatite showed no change before and after heat treatment.The coating was uniform and showed no cracks.Moreover,a preliminary study of the bioactivity in vitro showed that mesenchymal stem cells exhibited higher cell proliferation potential on the hydroxyapatite nanoparticle/titanium coating than on the titanium or hydroxyapatite with normal particle size alone.Conclusions Hydroxyapatite nanoparticles-coated titanium implant possesses good biocompatibility,suggesting that the implant could be used in orthopaedics and dental surgery.国家自然科学基金(20273055);; 广东药学院科研基

半导体硅片的p-n结和铜沉积行为的电化学研究

分别采用电化学直流极化和交流阻抗技术 ,通过控制光照和溶液化学组分 ,研究了半导体硅片 /氢氟酸体系的电化学特性和半导体性能 .对 p( 1 0 0 )和 n( 1 0 0 )两种硅片的研究结果均表明 ,有光照条件下硅 /氢氟酸界面上的电化学反应很容易发生且起着主导作用 ,而黑暗条件下硅片则处于消耗期 ,电化学反应难于发生 ,因而其半导体性能起着重要的作用 .当溶液中有微量铜存在时 ,硅 /溶液界面上的电化学反应将被加速 .通过单独研究两种硅片的电化学行为 ,讨论了半导体硅片在氢氟酸溶液中形成的 p- n接点行为 ,并通过考察溶液中的铜离子浓度、光照条件和沉积时间对铜在硅片上的沉积行为的影响 ,探讨了铜沉积机理 .研究结果表明 ,电化学交流阻抗法对研究稀释氢氟酸溶液中 ppb浓度水平的微量铜杂质对硅片表面的污染极为有效 ,有望用于半导体硅片表面铜污染的检

Preface Special Issue in Honor of Professor Zhaowu Tian on His 90Birthday

The Journal of Electrochemistry is proud to publish this Special Issue Honoring Professor Zhaowu Tian,on the occasion of his 90birthday,for his enormous contributions to and far-reaching impact in the field of electrochemistry

CORROSION INHIBITION of CTAB、SDS AND Na_2WO_4 FOR PRINT CIRCUIT BOARD IN NEUTRAL NaCl SOLUTION

采用电化学阻抗和极化曲线法,研究了在nACl溶液中,钨酸钠、十六烷基三甲基溴化铵(CTAb)及十二烷基硫酸钠(SdS)的单一配方以及其复配对印刷电路板的缓蚀作用.结果表明:CTAb、SdS和钨酸钠各自的单一配方对印刷电路板(PCb)均具有一定的缓蚀作用,其中CTAb浓度为1.0x10-4MOl/l,SdS浓度为5.0x10-3MOl/l及350Mg/l钨酸钠表现出最佳的缓蚀效率;SdS和钨酸钠属于阳极型缓蚀剂,CTAb为混合型缓蚀剂;当二者复配使用时,浓度为250Mg/l钨酸钠和1.0x10-4MOl/lCTAb以及300Mg/l钨酸钠和5.0x10-3MOl/lSdS的复配缓蚀剂的缓蚀效果最佳,复配缓蚀剂具有协同效应,并且对印刷电路板的缝隙腐蚀有一定的抑制作用.In this paper,the typical cation surfactants,such as cetyl trimethyl ammonium bromide(CTAB),anion surfactant sodium dodecyl sulphate(SDS)and sodium tungstate(Na2WO4)were studied as inhibitor for print circuit board(PCB)in neutral NaCl solution by polarization curve and electrochemical impedance spectroscopic.Moreover,the inhibition behavior of the mixture of Na2WO4,CTAB and SDS was also studied.It is indicated that CTAB,SDS and sodium tungstate all show certain inhibition effect for PCB.CTAB has a better inhibition at the concentration of 1.0×10-4 mol/L,SDS exhibits a better inhibition at the concentration of 5.0×10-3 mol/L,and the concentration of Na2WO4 for best inhibition is 350 mg/L.SDS and Na2WO4 both are anodic inhibitor,and CTAB is a mixed inhibitor.The mixture of 250 mg/L Na2WO4+1.0×10-4 mol/L CTAB or 300 mg/L Na2WO4+5.0×10-3 mol/L has a best inhibition behavior,appearing a synergic effect,to uniform and crevice corrosion of PCB as well.国家自然科学基金资助课题(50731004

A REVIEW OF INVESTIGATION ON PITTING CORROSION OF ALUMINUM ALLOY

综述近年来国内外有关Al合金点腐蚀的研究概况 .包括特征电位的研究、点腐蚀发生发展机理的研究和缓蚀剂缓蚀机理研究等 .侧重介绍近几年在Al合金点腐蚀研究中具有空间分辨度的原位研究技术 .Pitting corrosion of aluminum alloy is a complex but important problem.This paper provides a review of the recent investigation of pitting corrosion of aluminum alloy.Characteristic potentials,mechanisms of the pitting initiation,protective mechanisms of inhibitors are included in this paper.In addition,some in situ imaging electrochemical techniques are discussed.These in situ methods include electrochemical scanning tunneling microscopy (ECSTM),atomic force microscopy (AFM),scanning Kelvin probe force microscopy (SKPFM),scanning microelectrode technique (SMET) and some other techniques.国家自然科学基金资助项目 (No .5 98710 43

常见杂质离子对不锈钢钝化处理的影响

通过在不锈钢钝化处理液中分别添加Cl---、fE--（3+）等常见化学杂质,对18-8不锈钢进行钝化处理,应用电化学方法测量点腐蚀临界电位等腐蚀参数,考察钝化液中化学杂质对不锈钢表面耐蚀处理效果的影响。国家自然科学基