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Effects of substrates on the composition and Microstructure of TiO2 Thin Films Prepared by the LPD Method

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Effects of Substrates on the Composition and Microstructure ...

The 3～〔rd〕International conference on High-Performance ceramics(cIcc-3)（1）

作者： s.c.lee Department of civil and structural Engineering The Hong Kong polytechnic UniversityHung HomKowloonChina

＜正＞ TiO2 thin films were prepared on soda lime glass, fused quartz and stainless steel substrates by liquid phase deposition （LPD） method from a （NH4）2TiF6 aqueous solution upon the addition of boric acid （H3BO3）, and then calcined at 500℃for 2 h. The prepared films were characterized with X-ray diffraction （XRD）, scanning electron microscopy （sEM） and X-ray photoelectron spectroscopy （XPs）. It was found that the substrates obviously influenced the element composition and microstructure of TiO2 thin films. Except Ti, O and a small amount of F and N elements, which came from the precursor solution, some si （or Fe） element in the thin films deposited on soda lime glass and quartz substrates （or on stainless steel substrate） was confirmed. The si （or Fe） element in the thin films could be attributed to two sources. One was from the siF62- ions （or FeF62- ions） formed by a reaction between the treatment solution and soda lime glass or quartz （or stainless steel） substrates. The other was attributed to the diffusion of si （or Fe） from the surface of substrates into the TiO2 thin films after calcination at 500℃. The si （or Fe） element in the TiO2 thin films could behave as a dopant and resulted in the formation of composite siO2/TiO2 （or Fe2O3/TiO2） thin films on the substrates.

关键词： LPD method substrates composition Microstructure

spatial variation and relationship of indoor/outdoor PM2.5 in generic urban,roadside and industrial plant area of Guangzhou city,china

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Spatial variation and relationship of indoor/outdoor PM2.5 i...

第九届全国气溶胶会议暨第三届海峡两岸气溶胶技术研讨会

作者： s.c.lee Department of civil and structural Engineering Research Center for Urban Environmental Technology & ManagementHong Kong Polytechnic UniversityHung HumKowloonHong Kong

Fine particulate(PM) have been measured using Airmetrics mini-volume portable samplers during 2nd July and 13th August,2004 inside and outside nine homes located in generic urban area,roadside area and industrial plant area in Guangzhou city,china *** main objectives of this study are to assess PM pollution levels in Guangzhou,to investigate spatial variation rules in 3 different areas,and to find out source implication of indoor and outdoor *** indoor and outdoor PM average concentrations(67.7 and 74.5μtg/m)were greatly higher than NAAQs,and higher than the levels in other studies(New York,London,Amsterdam,Brisbane,Osaka and Hong Kong,etc).Both indoor and outdoor average PM concentrations in roadside area(73.5 and 79.4μg/m)and in industrial plant area(73.4 and 92.9μg/m)were higher than those in generic area (56.2 and 51.2μg/m).The average I/O ratio in generic urban area,roadside area and industrial plant area were 1.098,0.926 and 0.790,*** indoor/outdoor correlations of PM in generic urban area,roadside area and industrial area were from strong(R=0.7028,p=0.001,n=11)to moderate(R=0.5391,p=0.007,n=12)and to weak(R=0.1749,p=0.088,n=12). strong indoor/outdoor PM correlation with I/O＞1 in generic urban area indicated excellent ventilation condition at there,good indoor/outdoor PM correlation with I/O＜1 in roadside area suggested that the indoor PM were mainly from the outdoor air, and weak indoor/outdoor PM correlation in industrial plant area was ascribed to seldom ventilation in Is2.

关键词： PM2.5 Residential Homes Indoor air quality I/O ratio Guangzhou city china

Atmospheric Fine and coarse Particles at a Roadside site in Hong Kong

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Atmospheric Fine and Coarse Particles at a Roadside Site in ...

第九届全国气溶胶会议暨第三届海峡两岸气溶胶技术研讨会

作者： s.c.lee Department of civil and structural Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

With the rising environmental and resultant health awareness,there are increasing concerns on particulate emissions due to the continuously growing vehicle numbers and kilometers driven in Hong ***,investigation on particulate emissions related to vehicles is needed in order to improve urban air *** this study,fine(D＜2.5μm) and coarse (2.5μm ＜D＜10μm)particles were collected at PU(PolyU)supersite,a typical roadside site with heavy traffic. Investigation on the chemical compositions and abundance of aerosols shows distinct differences between fine and coarse *** diurnal cycles of fine particle mass concentrations track the fluctuations of the local vehicle numbers,on the other hand,the seasonal cycles are influenced by East Asia monsoons,which bring pollutants from upwind *** coarse particles,a good relationship is found between the hourly mean mass concentration and wind *** study of aerosol chemical compositions also indicates substantial variations for the two fractions. To better understand the sources of particles at PU supersite,various techniques,including Oc/Ec ratios,linear regression,PMF (Positive Matrix Factorization)and cMB(chemical Mass Balance)receptor model,are applied in this *** exhaust is identified as the major source for fine particles,while resuspensions being the main source for coarse ***-scale pollution is another important source for fine *** contributions from regional pollution can increase to nearly half of the total fine particulate mass when air masses are from china’s mainland.

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spatial distribution and seasonal variation of char-Ec and soot-Ec in the atmosphere over china

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Spatial distribution and seasonal variation of char-EC and s...

第五届海峡两岸气溶胶技术研讨会

作者： s.c.lee K.F.Ho Research center of Urban Environmental Technology and Management Department of Civil and Structural EngineeringThe Hong Kong Polytechnic UniversityHung HumKowloonHong Kong

Ec is a collective term that encompasses all thermally altered carbonaceous material generated from fossil fuel combustion and biomass burning,and can be subdivided into two classes: soot and *** study on PM carbonaceous aerosols (cao et al.,2007,***.,112, D22s11,doi:10.1029/2006JD008205,2007) measured with the thermal optical reflectance (TOR) method in fourteen chinese cities are refined by subdividing total Ec into char-Ec and soot-Ec. Average char-Ec concentrations vary greatly among the fourteen cities and for winter and summer periods,with concentrations of 8.67 and 2.41 μg m in winter and summer,respectively;while spatial and seasonal soot-Ec vary small,with average concentrations of 1.26 and 1.21 μg m in winter and summer,*** to Ec,spatial distributions of char-Ec are influenced by the fuel consumptions and the Asian monsoon *** small spatial and seasonal variation of soot-Ec is consistent with its regional-to-global *** correlations between char-Ec and total Ec suggest that Ec concentrations may be determined mainly by char-Ec *** primary emission particles,char-Ec and soot-Ec ratio is good indicator of Ec source profiles since it varies by different source ***-Ec/soot-Ec ratios show summer minima and winter maxima in all these cities,which are consistent with the fuel *** correlation between char-Ec/soot-Ec and Oc/Ec,as well as seasonal small variation of Oc/Ec,suggests that Oc/Ec may not be good indicator for Ec source identification.

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微乳薄层色谱法鉴别甘草的研究

中草药 2007年第4期38卷 540-542页

作者：崔淑芬林焕冰 Frank s.c.lee 王小如深圳职业技术学院应用生物技术系广东深圳518055 南方医科大学药理学教研室广东广州510515 国家海洋局第一海洋研究所青岛现代分析技术及中药标准化重点实验室山东青岛266061 厦门大学化学化工学院现代分析科学教育部重点实验室福建厦门361005

甘草为重要的常用中药，素有“国老”之称，具止咳化痰、解毒清热、缓急止痛及调和诸药等作用，俗称“十方九草”，在临床上有大量的应用。《中国药典》2005年版收录的甘草药材有3种：乌拉尔甘草Glycyrrhiza uralensis Fisch．、胀果甘... 详细信息

甘草为重要的常用中药，素有“国老”之称，具止咳化痰、解毒清热、缓急止痛及调和诸药等作用，俗称“十方九草”，在临床上有大量的应用。《中国药典》2005年版收录的甘草药材有3种：乌拉尔甘草Glycyrrhiza uralensis Fisch．、胀果甘草*** Bat．和光果甘草*** L．不同种类的甘草成分有一定的区别，而采用现有的药典方法并不能区分不同种类的甘草。微乳薄层色谱是近几年发展的薄层色谱新方法，处于方法的初创阶段。笔者所在的课题组对微乳薄层色谱进行了系统的理论和应用研究，本实验研究微乳薄层色谱应用于3种甘草药材的鉴别。

关键词：薄层色谱法鉴别乌拉尔甘草微乳《中国药典》常用中药止咳化痰解毒清热调和诸药

非平衡体系中固相微萃取技术的定量分析研究——快速监测水中痕量的有机污染物(多环芳烃)

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高等学校化学学报 1999年第5期20卷 699-703页

作者：王翊如王小如 Franks.c.lee 厦门大学化学系香港浸会大学化学系

采用固相微萃取技术，以１００μｍ膜厚的聚二甲基硅氧烷纤维萃取水中１０种多环芳烃，在６０ｍｉｎ采样时间内纤维上的吸附量与采样的时间近乎成正比，分配体系达到平衡前可以定量地测定水中的待测物．该方法的线性范围在０．１～１０... 详细信息

采用固相微萃取技术，以１００μｍ膜厚的聚二甲基硅氧烷纤维萃取水中１０种多环芳烃，在６０ｍｉｎ采样时间内纤维上的吸附量与采样的时间近乎成正比，分配体系达到平衡前可以定量地测定水中的待测物．该方法的线性范围在０．１～１００μｇ／Ｌ，检出限在０．０１～０．０３μｇ／Ｌ，１５μｇ／Ｌ的回收率在８０％～１００％。

关键词：多环芳烃 PAHs 测定水质监测色质联用

Dicarboxylic Acids,Ketocarboxylic acids,α-dicarbonyls,Fatty Acids and Benzoic Acid in urban aerosols collected during 2006 in Beijing

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Dicarboxylic Acids,Ketocarboxylic acids,α-dicarbonyls,Fatty...

第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： K.F.Ho s.c.lee Kimitaka Kawamura Eri Tachibana sKLLQG Institute of Earth EnvironmentChinese Academy of SciencesChina Research center of Urban Environmental Technology and Management Department of Civil and Structural EngineeringThe Hong Kong Polytechnic UniversityHun Hom Institute of Low Temperature science Hokkaido UniversitySapporo

Ground-based studies of PM2.5 were conducted for 29 water-soluble organic species including diacids,ketoacids,dicarbonyls,fatty acids and benzoic acid using a capillary Gc and Gc/Ms during campaign of Air Quality Research in Beijing 2006（cAREBeijing-2006）（21 August to 4 september 2006） at urban（Peking University,PKU） and suburban sites（Yufa） of Beijing.

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HPLc指纹图谱应用于炙甘草的炮制研究

中成药 2007年第11期29卷 1636-1639页

作者：崔淑芬张信青 Frank s.c.lee 王小如深圳职业技术学院应用生物技术系广东深圳518055 国家海洋局第一海洋研究所青岛现代分析技术及中药标准化重点实验室山东青岛266061 厦门大学化学化工学院现代分析科学教育部重点实验室福建厦门361005

目的:应用HPLc指纹图谱规范炙甘草的炮制。方法:采用反相高效液相色谱法,DENALI c18色谱柱(VYDAc238DE5415,120A,5μm,4.6mm×150mm),以3%(v/v)HAc溶液和甲醇为流动相,梯度洗脱,柱温40℃,检测波长252nm。结果:炙甘草的HPLc指纹图谱有20... 详细信息

目的:应用HPLc指纹图谱规范炙甘草的炮制。方法:采用反相高效液相色谱法,DENALI c18色谱柱(VYDAc238DE5415,120A,5μm,4.6mm×150mm),以3%(v/v)HAc溶液和甲醇为流动相,梯度洗脱,柱温40℃,检测波长252nm。结果:炙甘草的HPLc指纹图谱有20个共有峰。传统炒制法炮制的炙甘草样品有一部分峰的重现性RsD值>3%;烘制法炮制的样品重现性有2个共有峰相对峰面积比的RsD>3%;微波法炮制的样品重现性符合指纹图谱的要求,20个共有峰相对峰面积比的RsD值均小于3%。结论:烘制和微波加热的炮制方法,可控性强,样品的指纹图谱重现性高,可以作为替代传统炒制工艺的新工艺。

关键词：炙甘草炮制 HPLc指纹图谱

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液相臭氧氧化法测定海水化学耗氧量

分析测试学报 2005年第3期24卷 67-70页

作者：靳保辉庄峙厦王小如 Frank s.c.lee 深圳出入境检验检疫局广东深圳518067 厦门大学化学系现代分析科学教育部重点实验室福建厦门361005 国家海洋局第一海洋研究所山东青岛266061

基于溶解臭氧在水体中能够氧化鲁米诺产生发光现象,建立了一种利用流动注射液相化学发光技术(FI-cL)测定化学耗氧量(cOD)的新方法。cOD测定范围在0.6～24mg/L之间,适合海水监测。对实际海水水样的测定结果与碱性高锰酸钾法具有一致趋势... 详细信息

基于溶解臭氧在水体中能够氧化鲁米诺产生发光现象,建立了一种利用流动注射液相化学发光技术(FI-cL)测定化学耗氧量(cOD)的新方法。cOD测定范围在0.6～24mg/L之间,适合海水监测。对实际海水水样的测定结果与碱性高锰酸钾法具有一致趋势,测定的相对标准偏差小于10%。

关键词：臭氧 cOD 流动注射化学发光