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Photocatalytic Activity of K4Nb6O17 Doped with Fe^3＋ and Cr^3＋

Journal of Rare Earths 2004年第5期22卷 662-662页

作者： YangYahui ChenQiyuan YinZhoulan LiJie LiangSheng collegeofchemistryandchemicalengineering ＂CentralSouthUniversityChangsha410083China

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Synthesis of Ce and Y Doped Perovskite-Type Oxides and Its Application in Synthesis of Ammonia at Atmospheric Pressure

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Journal of Rare Earths 2005年第1期23卷 i001-i001页

作者： LiZhijie WangJide LiuRuiquan XieYahong collegeofchemistryandchemicalengineering XinjiangUniversityUrumqi830046China

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Advances in the Marine Photochemistry of Some Important Transition Metal Elements

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Journal of Ocean University of Qingdao 2003年第1期2卷 79-84页

作者： YANGGuipeng ZHAOXuekun QIJialin collegeofchemistryandchemicalengineering OceanUniversityofChinaQingdao266003P.R.China ShandongImportandExportCommodityInspectionBureau Qingdao266002P.R.China

Marine inorganic photochemistry, as one of the important branches of marine chemistry, is significantly connected with marine biology, marine ecology, marine geochemistry and marine environment, and plays an important role in the development of marine sciences. To date, lots of investigations in the field have been conducted home and abroad. As for the following development of marine inorganic photochemistry, it is greatly of significance to summarize these research works. This paper detailedly summarizes the present research progress in the photochemistry of Fe, Mn and Cu, with an emphasis on investigations on photochemical processes which could affect existing forms of these metal elements in seawater. The problems and shortcomings in the study field are pointed out and some suggestions for the future study are put forward.

关键词： transition metal iron manganese copper photochemistry seawater

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EXAMINATION OF SILICATE LIMITATION OF PRIMARY PRODUCTION IN JIAOZHOU BAY, CHINA I. SILICATE BEING A LIMITING FACTOR OF PHYTOPLANKTON PRIMARY PRODUCTION

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Chinese Journal of Oceanology and Limnology 2002年第3期20卷 208-225页

作者：杨东方张经吕吉斌高振会陈豫 CollegeofFisheryScience ShanghaiFisheriesUniversityShanghai200090China BeihaiMonitoringCenterofStateOceanicAdministration Qingdao266033China KeyLaboratoryofScienceandEngineeringforMarineEcologicalEnvironment StateOceanicAdministrationQingdao266061China collegeofchemistryandchemicalengineering OceanUniversityofQingdaoQingdao266003China CollegeofComputerScience ShanghaiFisheriesUniversityShanghai200090China

Jiaozhou Bay data collected from May 1991 to February 1994, in 12 seasonal investigations, and provided the authors by the Ecological Station of Jiaozhou Bay, were analyzed to determine the spatiotemporal variations in temperature, light, nutrients (NO - 3 N, NO - 2 N, NH + 4 N, SiO 2- 3 Si, PO 3- 4 P), phytoplankton, and primary production in Jiaozhou Bay. The results indicated that only silicate correlated well in time and space with, and had important effects on, the characteristics, dynamic cycles and trends of, primary production in Jiaozhou Bay. The authors developed a corresponding dynamic model of primary production and silicate and water temperature. Eq.(1) of the model shows that the primary production variation is controlled by the nutrient Si and affected by water temperature; that the main factor controlling the primary production is Si; that water temperature affects the composition of the structure of phytoplankton assemblage; that the different populations of the phytoplankton assemblage occupy different ecological niches for C , the apparent ratio of conversion of silicate in seawater into phytoplankton biomas and D , the coefficient of water temperature’s effect on phytoplankton biomass. The authors researched the silicon source of Jiaozhou Bay, the biogeochemical sediment process of the silicon, the phytoplankton predominant species and the phytoplankton structure. The authors considered silicate a limiting factor of primary production in Jiaozhou Bay, whose decreasing concentration of silicate from terrestrial source is supposedly due to dilution by current and uptake by phytoplankton; quantified the silicate assimilated by phytoplankton, the intrinsic ratio of conversion of silicon into phytoplankton biomass, the proportion of silicate uptaken by phytoplankton and diluted by current; and found that the primary production of the phytoplankton is determined by the quantity of the silicate assimilated by them. The phenomenon of apparently high plan

关键词： phytoplankton silicon limiting factor Jiaozhou Bay

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Hydrothermal Synthesis of ZrO2-10% Dy2O3 Nanocrystallites in Basic Media and Electrical Properties of Their Sinters

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Journal of Rare Earths 2005年第3期23卷 385-385页

作者： TaoWeihua MaGuilin DepartmentofChemistry YanchengTeachersCollegeYancheng224002China／／CollegeofChemistryandChemicalEngineeringSuzhouUniversitySuzhou215006China collegeofchemistryandchemicalengineering SuzhouUniversitySuzhou215006China

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Effect of the amount of zinc-doped on the electrochemical performance of nickel hydroxide

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Journal of Chongqing University 2004年第1期3卷 74-77页

作者： YUDanmei ZHOUShangqi CHENChangguo WENLi WANGHuaqing collegeofchemistryandchemicalengineering ChongqingUniversityChongqing400030P.R.China CollegeofMaterialScienceandEngineering ChongqingUniversityChongqing400030P.R.China

The nickel hydroxide prepared by micro-emulsion method was doped by coprecipitated Zn. The effect of the amount of zinc-doped on the properties of Ni(OH)2 such as the reversibility of the electrode reaction, the charge efficiency and active material utilization ratio of nickel electrode, and discharge specific capacity was studied by cyclic voltammetry and constant current charge-discharge tests. The results indicate that the specific discharge capacity of nickel hydroxide obtained by micro-emulsion method is much less than its theoretical value because the transfer of electrons and the diffusion of protons H+ are hindered owing to its crystal grain size in a nanometer range and thus possessing higher crystal interface resistance. The crystal cells are swelled and the crystal defects increased in prepared material due to part of Ni2+ substituted by Zn2+ when zinc and nickel hydroxide are coprecipitated. Hence, the electrons and protons H+ in the electrode reaction are transferred easily, the electrochemical behavior of nickel electrode is improved and discharge specific capacity is promoted. However, the performance of Ni(OH)2 is gradually enhanced with the addition of zinc-doped at first, while slowly decreased after the content of zinc is added to a certain value. The best electrode reaction reversibility, the highest electrode charge efficiency, the highest active material utilization ratio and the largest specific capacity on discharge are available when the mass fraction of Zn doped in nickel hydroxide by coprecipitation reaches 2.5 %.

关键词： nickel hydroxide coprecipitation zinc-doped micro-emulsion

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Synthesis and Luminescent Properties of Novel Red Long-Lasting Phosphor Ca2Zn4Ti15O36：Pr^3＋

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Journal of Rare Earths 2005年第1期23卷 51-51页

作者： LiXiuying LianShixun LiuLiming ZhuAiling LiChengzhi ZhangHuajing YinDulin collegeofchemistryandchemicalengineering HunanNormalUniversityKeyLaboratoryofChemicalBiology＆TraditionalChineseMedicineResearchMinistryofEducationChangsha410081China

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THERMODYNAMIC AND PARTICLE-DYNAMIC STUDIES ON SYNTHESIS OF SILICA NANOPARTICLES USING MICROWAVE-INDUCED PLASMA CVD

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China Particuology 2004年第5期2卷 207-214页

作者： RuoyuHong JianminDing GuoliangZheng collegeofchemistryandchemicalengineering SoochowUniversitySuzhou215006P.R.China IBM HYDA/050-3C2023605Highway52NorthRochesterMN55901USA InstituteofProcessEngineering ChineseAcademyofSciencesBeijing100080P.R.China

Recent studies on preparation of silica nanoparticles using plasma chemical vapor deposition (PCVD) are briefly reviewed. A microwave (MW) PCVD apparatus was set up to synthesize silica nanoparticles by the oxidation of silicon tetrachloride. Computations based on the minimization of Gibbs free energy were conducted to find the equilib- rium compositions, the optimal reaction temperature, the suitable mole ratio of oxygen to silicon tetrachloride, and the best inlet positions of silicon tetrachloride. The mean particle diameter and specific surface area were obtained from particle dynamic simulation. Experimental investigation verified the results obtained from the thermodynamic and parti- cle-dynamic computations, and showed that the maximum production rate of silica was more than 1 kg.h-1 with the full MW input power.

关键词： microwave plasma chemical vapor deposition nanoparticle silica

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Study on Purple Long Persistence Aluminate Phosphor

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Journal of Rare Earths 2004年第3期22卷 374-374页

作者： TengXiaoming ZhuangWeidong ZhaoChunlei ZhaoHuan FangYing ChangYongfeng SunYimin NationalEngineeringResearchCenterforRareEarthMaterials GeneralResearchInstituteforNonferrousMetalsGriremAdvancedMaterialsCo.Ltd.Beijing100088China collegeofchemistryandchemicalengineering CentralSouthUniversityChangsha410083China InstituteofChemistryandMaterialScience AnhuiNormalUniversityWuhu241000China

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