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Science china Chemistry 2010年第6期53卷 1453-1458页

作者： FU YingZi1,CHEN Min1,CUI Xin2.WANG LiLan1,CHEN Qiao1 & ZHOU Juan1 1Key Laboratory on Luminescence and Real-Time Analysis,Ministry of Education college of Chemistry and chemical {2.,Southwest university,Chongqing 400715,china 2.ey Laboratory of Green Chemistry & Technology,Ministry of Education college of Chemistry,sichuan university,chengdu 610064,china 1. Key Laboratory on Luminescence and Real-Time Analysis Ministry of Education college of Chemistry and chemical {2. Southwest University Chongqing 400715 China2. Key Laboratory of Green Chemistry & Technology Ministry of Education college of Chemistry Sichuan University Chengdu 610064 China

The novel nanocomposites were obtained by covalently linking arginine enantiomers with the sidewall of multi-walled carbon nanotubes,and utilized as sensing materials for biomolecular recognition in electrochemical *** were characterized by X-ray photoelectron spectroscopy (XPS),transmission electron microscopy (TEM) and circular dichroism spectroscopy (CD).Nano-gold and Prussian Blue were employed to amplify the analytical signal *** specific antibody/antigen and carcinoembryonic antibody/antigen were used as model *** results showed that the different configurations of nanocomposites could readily facilitate chiral recognition of antibodies,and D-nanocomposites displayed a larger signal.

关键词： arginine multi-walled carbon nanotubes chiral nanocomposites recognition electrochemical immunoassay

钢纤维几何尺寸对钢纤维混凝土损伤变形特性的影响

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土木工程学报 2010年第4期43卷 119-124页

作者：康亚明刘长武韩小刚王东四川大学水利水电学院四川成都610065 四川大学水力学与山区河流开发保护国家重点实验室四川成都610065

钢纤维混凝土是在普通混凝土中均匀掺入一定量钢纤维而组成的一种多相复合材料。利用空间应力状态下的损伤统计本构方程,得出了钢纤维掺量和钢纤维几何尺寸不同时的分布参数和临界损伤值,并定性分析了钢纤维掺量和钢纤维几何尺寸对损伤... 详细信息

钢纤维混凝土是在普通混凝土中均匀掺入一定量钢纤维而组成的一种多相复合材料。利用空间应力状态下的损伤统计本构方程,得出了钢纤维掺量和钢纤维几何尺寸不同时的分布参数和临界损伤值,并定性分析了钢纤维掺量和钢纤维几何尺寸对损伤变形参数的影响。研究结果表明:(1)钢纤维的掺入显著降低了混凝土的脆性,提高了混凝土的宏观平均强度;(2.分布参数m能综合反映钢纤维混凝土的脆性;其倒数1/m可以反映其延性,即反映钢纤维的增韧作用;(3)分布参数ε*可以综合反映钢纤维混凝土的宏观平均强度,即可以综合反映钢纤维的增强作用;(4)钢纤维的几何尺寸(如长度、长细比)对钢纤维的增强和增韧作用有显著影响。

关键词：钢纤维混凝土几何尺寸变形特性 Weibull分布临界损伤分布参数韧性

Optimizing of Culture Conditionin Horizontal Rotating Bioreactor

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生物医学工程学杂志 2005年第S1期22卷 129-130页

作者： Yan-Fang ZHANG~(1,2. Huai-Qing CHEN~1 Hua HUANG~31(Institute of Biomedical engineering, West china Medical Center,{2., chengdu 610041, china)2.Physics Department of Guangdong Medicinal college, Zhanjiang 52.02.,china)3 (Medical Information engineering Department,{2., chengdu 610041, china) Institute of Biomedical engineering West China Medical Center Sichuan University Chengdu 610041 China Physics Department of Guangdong Medicinal college Zhanjiang 524023 China Institute of Biomedical engineering West China Medical Center Sichuan University Chengdu 610041 China Medical Information engineering Department Sichuan University Chengdu 610041 China

1 IntroductionBioreactor is the most important equipment in tissue engineering. It can mimic the micro-environment of cell growth in vitro. At present, horizontal rotating bioreactor is the most advanced equipment for... 详细信息

关键词： Optimizing of Culture Conditionin Horizontal Rotating Bioreactor cell

Sensing characterization of Sn/In/Ti nanocomplex oxides for CO, CH_4 and NO_2

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Science china(Technological Sciences) 2007年第1期50卷 18-26页

作者： BAI ShouLi1, TONG ZhangFa2. LI DianQing1, HUANG XiaoWei3, LUO RuiXian1 & CHEN AiFan1 1 State Key Laboratory of chemical Resource engineering, Beijing {2. of chemical Technology, Beijing 10002., china 2.School of Chemistry and chemical engineering, Guangxi {2., Nanning 530004, china 3 college of Biochemical engineering, Beijing Union {2., Beijing 10002., china 1. State Key Laboratory of chemical Resource engineering Beijing University of Chemical Technology Beijing 100029 China 2. School of Chemistry and chemical engineering Guangxi University Nanning 530004 China 3. college of Biochemical {2. Beijing Union University Beijing 100023 China

The nanocomplex oxides of Sn-In and Sn-In-Ti were prepared by controlled co-precipitation method as sensing materials of semiconductor gas sensors for detection of CO, CH4 and NO2. Through manipulating the Sn/In cation ratio, metal salt total concentration, precipitation pH value and aging time, the nanocrystalline powders were successfully derived with chemical homogeneity and superior thermal stability, compared with the single component oxides. The particle size and morphology, surface area, and thermal and phase stabilities were characterized using TEM, TG-DTA, BET and XRD. The sensing tests showed that the Sn-In com-posites exhibit high sensitivity and selectivity for CO and NO2. The introduction of TiO2.enhanced CH4 sensitivity and selectivity, particularly, additives of Pd and Al2.3 as a dopant and surface modification greatly enhanced the sensing properties. The sensitivity depended on the composition of composites, calcination temperature and operating temperature. The optimal values were (2.%In2.3- 75%SnO2.-2.%TiO2.for ternary composite, 600 and 300℃, respectively. Temperature-programmed de-sorption (TPD) studies were employed to explain the gas adsorption behavior dis-played by the surface of nanocomposites and X-ray photoelectron spectroscopic (XPS) analysis was used to confirm the electronic interactions existing between oxide components. The sensing mechanism of the nanocomposites was attributed to chemical and electronic synergistic effects.

关键词： SnO2.In2.3-TiO2 nanocomposites CO NO2 CH4 gas sensing

Effect of UV Irradiation on PAN Precursor Fibers and Stabilization Process

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Journal of Wuhan university of Technology(Materials Science) 2011年第3期26卷 449-454页

作者：袁慧五 Department of Chemistry and Material Naval University of Engineering

A low-cost rout for modification the polyacrylontrile（PAN） precursor fibers was *** approach involved pretreatment PAN precursor fibers with UV irradiation for various periods of time before the fibers were *** effect of UV irradiation on the chemical structure,orientation factor,density,crystallite size and morphology of the fibers in the process of stabilization was characterized by use of fourier transform infrared spectroscopy（FTIR）,float-sink procedure,X-ray diffraction（XRD）,scanning electron microscope（SEM）,*** results showed that UV irradiation could increase the density of the fibers in stabilization *** analysis indicated that the cyclization of nitrile groups was initiated at room temperature by UV *** transformation of C≡N groups to C=N ones was accelerated in the process of *** orientation factor of irradiated fibers was also *** crystallite size was decreased at first and increased later,and the better irradiation time of UV was 3 min according to the XRD *** analysis indicated that irradiation could decrease the internal and surface defects of the stabilized fibers treated at 300 ℃.

关键词： PAN precursor fibers UV irradiation cyclization crystallite size morphology

Preparation and Photochemical Behavior of a Cationic Azobenzene Dye-Montmorillonite Intercalation Compound

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Journal of Wuhan university of Technology(Materials Science) 2007年第3期22卷 466-469页

作者：万涛 college of Materials and Chemistry & chemical {2. Chengdu University of Technology

Montmorillonite/cationic azobenzene dye（p-（δ-triethylammoniobutoxy）-p＇-methyl- azobenzene bromide） intercalation compounds were prepared by the conventional ion exchange method. As compared with that of pure cationic azo-dye, the thermal stability of the intercalated dye was greatly enhanced, and the absorption band corresponding to azobenzene group in intercalated dye shifted towards longer wave length by 38 nm. This could be ascribed to the strong conjugation of cationic azo-dye supramolecular order structure（J cluster） confined in a nanoscale space of montmorillonite interlayer gallery. UV/vis spectra data show that the intercalated azo dye in the montmorillonite interlayer space exhibited reversible trans-to-cis photoisomerization and daylight cis-to-trans back reaction. FTIR indicates the successful intercalation of cationic azo-dye into the montmorillonite interlayer.

关键词： Na-montmorillonite azobenzene intercalation photoisomerization

Mesoporous Si-MCM-48 membrane prepared by pore-filling method

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Science china(Technological Sciences) 2010年第4期53卷 1064-1068页

作者： XU DeKan & FAN YiQun State Key Laboratory of Materials-Oriented chemical engineering,{2. of Chemistry and chemical engineering,Nanjing university of Technology,Nanjing 2.0009,china 1. State Key Laboratory of Materials-Oriented chemical engineering College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing 210009 China

Mesoporous MCM-48 membranes were prepared on asymmetric zirconia tubular support with an average pore size of 0.2.μm by hydrothermal *** support should be pretreated with H2. as a pore-filling substance to prevent the sol solution from infiltrating into the support *** SEM showed that the MCM-48 membrane was composed of tightly-connected spherical *** single gas N2.and H2.permeation experiments confirm that crack-free membrane could be prepared by pore-filling method.N2.permeance of MCM-48 membrane,synthesized by secondary growth,can reach 5.66×10-7 mol/Pa·s·m2.and the H2.N2.separation factor was 3.47 under trans-membrane pressure of 0.05 MPa.

关键词： MCM-48 mesoporous membrane pore-filling

Antibacterial Properties of TiO_2.Ceramic Pellets Prepared Using Nano TiO_2.Powder

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Journal of Wuhan university of Technology(Materials Science) 2009年第3期24卷 337-342页

作者：姚亚东殷光富 college of Materials Science and engineering Sichuan University

Titanium dioxide （TiO2. porous ceramic pellets with three dimension nano-structure were prepared using nano TiO2.powder. The TiO2.porous ceramic pellets were composed of TiO2.nanoparticles with 14-16 nm in diameter and had porosity of 74.85%. The mean pore size of the TiO2.porous ceramic pellets was 2..73 nm and the main pore size ranged from 3 to 16 nm. The mass loss of the TiO2.ceramic pellets was less than 5% after 2. d immersion in water. The antibacterial properties of the TiO2.pellets were studied. The sterilization rate of Colibacillus （hospital polluted water with bacterium） can reach 99% after 3 h photocatalytic process and these TiO2.pellets are easy to be re-activated and cyclically be used. The shaping mechanism and photocatalysis sterilization mechanism of the TiO2.pellets were discussed.

关键词： TiO2.ceramic pellet photocatalysis antibacterial properties

Electrochemical characteristics of amorphous MgTi_xNi(x = 0,0.1,and 0.2. hydrogen storage alloys

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Rare Metals 2010年第5期29卷 486-490页

作者： LIU Suqin,ZHAO Wenjuan,HUANG Kelong,and HUANG Hongxia college of Chemistry and chemical {2.,Central South university,Changsha 410083,china college of Chemistry and chemical {2. Central South University Changsha China

MgTixNi （x = 0, 0.1, and 0.2. alloys were successfully prepared by mechanical alloying （MA）, and the influence of milling time on the electrochemical characteristics of the electrodes was discussed. MgTixNi alloys after 90 h milling displayed the best electrochemical performance The X-ray diffraction patterns showed that the alloy ball-milled for 90 h was amorphous with a widened diffraction peak. The charge-discharge tests indicated that these alloys had good electrochemical activation properties, and the MgTi0.2.i alloy electrode exhibited the best cycle performance. The initial discharge capacity of the MgTi0.2.i alloy reached up to 401.1 mAh·g^-1, and the retention rate of capacity was 31.0% after 30 cycles, much higher than that of MgNi （17.3%）. The Tafel polarization curves revealed that Ti addition could enhance the anticorrosion performance of these alloys in alkali solution, which was responsible for the ameliorated cyclic stability of these alloy electrodes.

关键词： hydrogen storage alloys titanium electrochemical properties mechanical alloying

Electrochemical synthesis of ammonia using a cell with a Nafion membrane and SmFe_(0.7)Cu_(0.3-x)Ni_xO_3(x=0―0.3) cathode at atmospheric pressure and lower temperature

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Science china Chemistry 2009年第8期52卷 1171-1175页

作者： XU GaoChao,LIU RuiQuan & WANG Jin college of Chemistry and chemical {2.,Xinjiang university,Urumqi 830046,china college of Chemistry and chemical {2. Xinjiang University Urumqi 830046 China

Samaria-doped ceria Ce0.8Sm0.2.2.δ(SDC) and SmFe0.7Cu0.3-xNixO3 have been synthesized by the sol-gel method and characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM) and scanning electron microscopy(SEM).The electrochemical synthesis of ammonia was investigated at atmospheric pressure and low temperature,using the SFCN materials as the cathode,a Nafion membrane as the electrolyte,nickel-doped SDC(Ni-SDC) as the anode and silver-platinum paste as the current *** was synthesized from 2. to 100℃ when the SFCN materials were used as cathode,with SmFe0.7Cu0.1Ni0.2.3 giving the highest rates of ammonia *** maximum rate of evolution of ammonia was 1.13 × 10-8 mol·cm-2.s-1 at 80℃,and the current efficiency reached as high as 90.4%.

关键词： electrochemical synthesis of ammonia ammonia synthesis at atmospheric pressure and low temperature Nafion membrane metal oxide