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Synthesis and Characterization of Mg_3.PO_4)_2.coated Li_(1.05)Ni_(1/3.Mn_(1/3.Co_(1/3.O_2.Cathode Material for Li-ion Battery

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Journal of Wuhan university of Technology(Materials Science) 2009年第3期24卷 347-353页

作者：陈玉红 Department of Chemical and environmental engineering Hebei Chemical & Pharmaceutical Vocational Technology Colege

Mg3.PO4）2.coated Li1.05Ni1/3.n1/3.Co1/3.2.cathode materials were synthesized via co-precipitation method. The morphology, structure, electrochemical performance and thermal stability were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, cyclic voltammetry（CV）, electrochemical impedance spectroscopy（EIS）, charge/discharge cycling and differential scanning calorimeter （DSC）. SEM analysis shows that Mg3.PO4）2.coating changes the morphologies of their particles and increases the grains size. XRD and CV results show that Mg3.PO4）2.coating powder is homogeneous and has better layered structure than the bare one. Mg3.PO4）2.coating improved high rate discharge capacity and cycle-life performance. The reason why the cycling performance of Mg3.PO4）2.coated sample at 55 ℃ was better than that of room temperature was the increasing of lithium-ion diffusion rate and charge transfer rate with temperature rising. Mg3.PO4）2.coating improved the cathode thermal stability, and the result was consistent with thermal abuse tests using Li-ion cells： the Mg3.PO4）2.coated Li1.05Ni1/3.n1/3.o1/3.2.cathode did not exhibit thermal runaway with smoke and explosion, in contrast to the cells containing the bare Li1.05Ni1/3.n1/3.o1/3.2.

关键词： lithium-ion batteries cathode materials Li1.05Ni1/3.n1/3.o1/3.2 co-precipitation

Temperature-controlled ionic liquid dispersive liquid phase microextraction combined with ultra-high-pressure liquid chromatography for the rapid determination of triclosan,triclocarban and methyl-triclosan in aqueous samples

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Science china.Chemistry 2010年第12期53卷 2600-2607页

作者： GUO JieHong 1,2.LI XingHong 2.CAO XueLi 1,QU Lei 2.3.HOU DeKun 2.& XU XiaoBai 2.1.school of Chemical and environmental {2.,Beijing Technology and Business university,Beijing 100048,china.2.State Key Laboratory of environmental Chemistry and Eco-toxicology Research Center of Eco-environmental Sciences,Chinese Academy of Sciences,Beijing 100085,china.3.Zhengzhou university,Zhengzhou 450001,china 1. school of Chemical and environmental {2. Beijing Technology and Business University Beijing 100048 China2. State Key Laboratory of Environmental Chemistry and Eco-toxicology Research Center of Eco-environmental Sciences Chinese Academy of Sciences Beijing 100085 China3. Zhengzhou University Zhengzhou 450001 China

As extraction solvents,ionic liquids have green *** this study,an environmentally benign analytical method termed temperature-controlled ionic liquid dispersive liquid phase microextraction (TIL-DLME) combined with ultra-highpressure liquid chromatography (UHPLC)-tunable ultraviolet detection (TUV) was developed for the pre-concentration and determination of triclosan (TCS),triclocarban (TCC) and methyl-triclosan (M-TCS) in water *** parameters that may affect extraction efficiencies were examined and optimized,including the types and amount of ionic liquids,volume of the diluent,heating temperature,cooling time,salt effect and pH *** the optimum conditions,linearity of the method was observed in the ranges of 0.0100-100 μgL-1 for TCS and M-TCS,and 0.00500-50.0 μgL-1 for TCC with correlation coefficients (r2. > *** limits of detection (LODs) ranged from 1.15 to 5.3. *** in domestic water and TCC in reclaimed water were detected at the concentrations of 1.01 and 0.12. μgL-1,*** spiked recoveries of the three target compounds in reclaimed water,irrigating water,waste water and domestic water samples were obtained in the ranges of 68.4%-71.9%,61.6%-87.8%,58.9%-74.9% and 64.9%-92.4%,*** with the previous dispersive liquid-liquid microextraction method (DLLME) about the determination of TCS,TCC and M-TCS,this method is not only more environmentally friendly but also more sensitive.

关键词： ionic liquid temperature-controlled ionic liquid dispersive liquid phase microextraction UHPLC aqueous samples

Dominant point detecting based non-uniform B-spline approximation for grain contour

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Science china.Technological Sciences) 2007年第1期50卷 90-96页

作者： ZHAO XiuYang1, yin YanSheng1,2.& YANG bo3.1 Shandong Key Laboratory of engineering Ceramics, Shandong university, Jinan 2.0061, china.2.school of Materials, Ocean university of china. Qingdao 2.6003. china.3.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan university of Science and Technology, Wuhan 43.070, {12. 1. Shandong Key Laboratory of engineering Ceramics Shandong University Jinan 250061 China 2. school of Materials Ocean University of China Qingdao 266003 China 3. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Science and Technology Wuhan 430070 China

Three-dimension reconstruction from serial sections has been used in the last decade to obtain information concerning three-dimensional microstructural ge-ometry. One of the crucial steps of three-dimension reconstruction is getting compact and fairing grain contours. Based on the achievement of closed raw con-tours of ceramic composite grains by using wavelet and level set, an adaptive method is adopted for the polygonal approximation of the digitized raw contours. Instead of setting a fixed length of support region in advance, the novel method computes the suitable length of support region for each point to find the best es-timated curvature. The dominant points are identified as the points with local maximum estimated curvatures. Periodic closed B-spline approximation is used to find the most compact B-spline grain boundary contours within the given tolerance. A flexible distance selection approach is adopted to obtain the common knot vector of serial contours consisting of less knots that contain enough degrees of freedom to guarantee the existence of a B-spline curve interpolating each contour. Finally, a B-spline surface interpolating the serial contours is generated via B-spline surface skinning.

关键词： composite B-spline dominant points control points grain contour

Adsorption of surfactants onto acrylic ester resins with different pore size distribution

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Science china.Chemistry 2006年第5期49卷 445-453页

作者： YANG Weiben1,2.3.LI Aimin1,3.CAI Jianguo1,3.MENG Guanhua1,3.& ZHANG Quanxing1,3.1. State Key Laboratory of Pollution Control and Resource Reuse,school of the Environment,Nanjing {2.,Nanjing 2.0093.china.2. Nanjing College of Chemical Technology,Nanjing 2.0048,china.3. Jiangsu engineering & Technology Research Center for Organic Toxicant Control and Resource Reuse,Nanjing 2.003.,china 1. State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China 2. Nanjing College of Chemical Technology Nanjing 210048 China 3. Jiangsu engineering & Technology Research Center for Organic Toxicant Control and Resource Reuse Nanjing 210038 China

In this study, a series of acrylic ester resins with different pore size distribution were prepared successfully by varying the type and the amount of pore-forming agents. In order to inves-tigate the adsorption behavior and mechanism of surfactants on acrylic ester resins, three kinds of surfactants were utilized as adsorbates that were sodium 6-dodecyl benzenesulfonate (6-NaDBS), sodium 1-dodecyl benzene sulfonate (1-NaDBS) and sodium 1-dodecyl sulfonate, respectively. It was observed that the surface area was available in a particular pore size and an appropriate pore size of resins appeared to be more important for the adsorption of surfactants. As compared to commercial acrylic ester resins XAD-7 and HP2.G, 50# and 3.# resins exhibited more excellent adsorption properties toward 1-NaDBS and 6-NaDBS. The experimental equilibrium data were fitted to the Langmuir, and double-Langmuir models. Two models provided very good fittings for all resins over the temperature range studied. The investigation indicated that electrostatic attraction and hydrogen bond between resins and surfactants were the main forces and had an obvious effect on adsorption proc-ess.

关键词： acrylic ester resin, surfactant, adsorption, pore size distribution, isotherm.

Reverse extraction of early-age hydration kinetic equation from observed data of Portland cement

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Science china.Technological Sciences) 2010年第6期53卷 1540-1553页

作者： WANG Lin1,YANG bo2.ZHAO XiuYang1,2.CHEN YueHui2.& CHANG Jun3.1 school of Computer Science and Technology,Shandong {2.,Jinan 2.0101,china.2.Provincial Key Laboratory for Network-based Intelligent Computing,{2. of Jinan,Jinan 2.002.,china.3.school of Material Science and engineering,{2. of Jinan,Jinan 2.002.,china 1. school of Computer Science and Technology Shandong University Jinan 250101 China2. Provincial Key Laboratory for Network-based Intelligent Computing University of Jinan Jinan 250022 China3. School of Material Science and Engineering University of Jinan Jinan 250022 China

The early-age hydration of Portland cement paste has an important impact on the formation of microstructure and development of ***,manual derivation of hydration kinetic equation is very difficult because there are multi-phased,multi-sized and interrelated complex chemical and physical reactions during cement *** this paper,early-age hydration kinetic equation is reversely extracted automatically from the observed time series of hydration degree of Portland cement using evolutionary computation method that combines gene expression programming and particle swarm optimization *** order to reduce the computing time,GPUs are used for acceleration in *** have shown that according to the extracted kinetic equation,simulation curve of early-age hydration is in good accordance with the observed experimental ***,this equation still has a good generalization ability even changing chemical composition,particle size and curing conditions.

关键词： Portland cement hydration kinetic equation reverse extraction gene expression programming particle swarm optimization

Biogas recovery from microwave heated sludge by anaerobic digestion

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Science china.Technological Sciences) 2010年第1期53卷 144-149页

作者： QIAO Wei1,WANG Wei2.ZHU CuiPing3.& ZHANG ZhongZhi1 1 College of Chemical Science and engineering,china.{2. of Petroleum,Beijing 102.49,china.2.Department of environmental Science and engineering,Tsinghua {2.,Beijing 10084,china.3.J & K china.Cleaning Energy Technology Co.Ltd.,Beijing 100085,china 1. College of Chemical Science and engineering China University of Petroleum Beijing 102249 China2. Department of Environmental Science and Engineering Tsinghua University Beijing 10084 China3. J & K China Cleaning Energy Technology Co. Ltd. Beijing 100085 China

Biogas generated from sewage sludge,livestock waste,and food waste by anaerobic digestion is a valuable renewable energy ***,conventional anaerobic digestion is not an efficient process.A long hydraulic retention time and low biogas recovery rate hinder the applications of those *** effective pretreatment method to destroy sludge microbial cells has been one of the major concerns regarding improvement of the biogas *** article focuses on the effects of microwave heating on sludge anaerobic *** suspended solid(VSS) and chemical organic demand solubilization of heated sludge were *** heating was found to be a rapid and efficient process for releasing organic substrates from *** increase of organic dissolution ratio was not obvious when holding time was over 5 min with microwave *** effect of the VSS solubilization was primarily dependent on heating *** highest value of VSS dissolving ratio,3..4%,was obtained at 170°C for 3. *** COD dissolving ratio was about 2.% at 170°*** organic carbon of treated sludge liquor was 1.98 and 2.73.g/L at 150°C and 170°C for 5 min,respectively.A biochemical methane potential(BMP) test of excess sludge and a mixture of primary and excess sludge demonstrated an increase in biogas *** total biogas from microwave treated mixture sludge increased by 12.9% to 2..2. over control after 3. days of *** production was 11.1% to 2..9% higher for excess sludge than for untreated *** VS removal ratios of mixture sludge and excess sludge were 12. and 11% higher,respectively,compared to the untreated sludge.

关键词： biogas recovery microwave heating sludge anaerobic digestion

AFM study on the adsorption and aggregation behavior of dissolved humic substances on mica

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Science china.Chemistry 2006年第3期49卷 256-266页

作者： GE Xiaopeng1, ZHOU Yanmei2. Lü Chunhua1 & TANG Hongxiao1 1. State Key Laboratory of environmental Aquatic Chemistry, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, china.2. school of Civil engineering & Architecture, Beijing Jiaotong university, Beijing 100044, china 1. State Key Laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China 2. school of Civil engineering & Architecture Beijing Jiaotong University Beijing 100044 China

Humic substances constitute the major organic fractions of soils, sediments and natural waters, and play a dominant role in the binding, mobilization, transport and ultimate fate of organic contaminants in subsurface systems. In this paper, two humic acid samples, Guanting and Tianjin, with different origin and chemical compositions have been investigated with AFM imaging for their adsorption and aggregation behaviors on mica. While the Tianjin humic sample is found to form small spheres with 2.0 to 3.0 nm in diameter at lower concentrations, irregular loop-chain assemblies of hundreds of nanometer in diameter with the chain width of a{2.ut 40 nm are dominant for the Guanting humic sample, which may attribute to the more polar aliphatic fractions in the chemical composition in the latter. The heterogeneous and polydisperse nature of humic substances with multiple structural features, such as sponge-like structures, perforated sheets, aggregate of spheres, branches and chain-like assemblies etc., is apparent at higher concentrations for {2.th humic samples, showing morphologically new evidence for the dominant view of the humic dual-mode sorption model. With naphthalene introduced, the assemblies of Guanting humic substances clearly become more compact with significantly narrowed branches and less porous the perforated sheet-like structures. It is indica- tive of that smaller nanometer scale rings present along the perforated assemblies could potentially represent hydrophobic domains, which may facilitate the adsorption and aggregation of naphthalene onto the natural particle surfaces and therefore lead to an important role of dissolved humic sub- stances in the sorption of environmental pollutants.

关键词： atomic force microscopy (AFM) dissolved humic substances morphology aggregation adsorption

Microwave Disinfection in a Ventilation and Air-Conditioning System

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湖南大学学报（自然科学版） 2009年第S1期36卷 55-59页

作者： LU Zhen1,2.ZHANG Ji-li1,MA Liang-dong1,HE Juan3.1.school of Civil & Hydraulic engineering,Dalian {2. of Technology,Dalian,Liaoning 11602.,china.2.Municipal and environmental engineering Research Center,Shenyang Jianzhu {2.,Shenyang,Liaoning 110168,china.3.school of Municipal & environmental engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150090,china. school of Civil and Hydraulic engineering Dalian University of Technology Dalian 116023 China Municipal and environmental engineering Research Center Shenyang Jianzhu University Shenyang 110168 China school of Municipal and environmental {2. Harbin Institute of Technology Harbin 150090 China

Because of its broad spectrum and high efficiency,the microwave disinfection was used to control the airborne microbial contaminates in VAC *** microwave disinfection devices were developed combined with air filter,the design and calculation method was presented,and the disinfection effects on White staphylococcus,Staphylococcus aureus,Bacillus Subtilis,Escherichi coli were *** results show that the major influence factors on disinfection effect are microwave power,water-content of filter material,disinfecting *** 15 min,the kill ratio is >90%,and the log value is >*** microwave field is uniform and the kill effect of bacteria on each surface of filter is the same,without statistically significant difference.

关键词： VAC system microwave disinfection airborne microbe microwave power kill ratio

Process optimization of reaction of acid leaching residue of asbestos tailing and sodium hydroxide aqueous solution

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Science china.Technological Sciences) 2009年第1期52卷 204-209页

作者： DU GaoXiang1,3. ZHENG ShuiLin2.& DING Hao1 1 school of Materials Science and Technology, china.{2. of Geosciences (Beijing), Beijing, 100083. china.2.school of Chemical and Environment engineering, china.{2. of Mining and Technology (Beijing), Beijing 100083. china.3.Hebei Qinghe Refractory Group Co. Ltd., Xingtai 054804, china 1. school of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 China 3. Hebei Qinghe Refractory Group Co. Ltd. Xingtai 054804 China 2. school of Chemical and Environment engineering China University of Mining and Technology (Beijing) Beijing 100083 China

Silica is the major component of the acid leaching residue of asbestos tailing. The waterglass solution can be prepared by the reaction of the residue with sodium hydroxide aqueous solution. Compared to the high temperature reaction method, this process is environmental friendly and low cost. In this paper, the reaction process of the residue and the sodium hydroxide aqueous solution is optimized. The optimum reaction process parameters are as follows: the usage of sodium hydroxide is 2..4 g/100 g acid leaching residue, the reaction temperature is 90℃, the reaction time is 1 h, and the ratio of the liquid/solid is 2.0. The significance sequence of the process parameters to the alkali leaching reaction effect is the usage of sodium hydroxide > the ratio of the liquid/solid > the reaction time > the reaction temperature. The significance sequence to the leaching ratio of SiO2.is the ratio of the liquid/solid > the usage of sodium hydroxide > the reaction time > the reaction temperature. The significance sequence to the modulus of the sodium silicate is the ratio of the liquid/solid > the usage of sodium hydroxide > the reaction time > the reaction temperature. Under the optimum conditions, the leaching ratio of the SiO2.is 77.5%, and the modulus of the sodium silicate is 3.15. The XRD analysis result indicates that the major components of the alkali leaching residue are serpentine, talc, quartz and some albite.

关键词： asbestos tailing acid leaching residue sodium hydroxide process optimization