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Chinese Chemical Letters 2020年第8期31卷 2091-2094页

作者： Md.Maruf Ahmed Ruihua Zhao Bayram Hayytov Yangyang Shang jinping li Jianping Du College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi Kunming Tobacco Co. Ltd.Taiyuan 030032China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan 030024China

Organic amines are important solvent and raw material in laboratory and industry,as well as releasing from cigarette *** is significant to detect low-concentration amines for environment and public *** we reported that as-synthesized zinc oxide is an effective electrode material of electrochemical sensor for the detection of *** characterization results reveal that the ZnO morphologies experienced a change from hexagonal bowl-like microparticles,cones,prisms to nanoparticles by adjusting the reaction time,temperature,solvents and ***,ZnO material possessing hexagonal shapes and different sizes exhibits distinct electrochemical response in various amines solution,suggesting that there is a better dependent relationship between different morphological ZnO and amines ***,regular hexagonal ZnO nanotablets exhibit a detectable electrochemical response and selectivity to ammonia,implying it can be serve as electrode material for highly effective detection of organic amines.

关键词： ZnO Morphology control Hexagonal nanotablet Electrochemical sensor Organoamines

Simple self-assembly of 3D laminated CuO/SnO2 hybrid for the detection of triethylamine

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Chinese Chemical Letters 2020年第8期31卷 2055-2058页

作者： Yangyang Shang Wenqiong Shi Ruihua Zhao Md.Maruf Ahmed jinping li Jianping Du College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi Kunming Tobacco Co. Ltd.Taiyuan 030032China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan 030024China

Tin dioxide is important gas sensor material and has wide applications in the detection of toxic gases and volatile organic ***,we synthesized a 3D laminated structural CuO/SnO2 material possessing p-n *** morphology and structure were characterized by XRD,SEM,TEM and XPS techniques and the sensing properties were investigated for the detection of triethylamine(TEA).The results indicate that 3D laminated CuO/SnO2 material,assembled by lamellae consisting of ordered nanoparticles,exhibit an enhanced sensing performance compared with SnO2,and notably,CuO/SnO2 with size less than 1μm has obvious high selectivity in the detection of 100 ppm ***,it has a high response and stability to 1 and 5 ppm TEA(S is 8 and 33),and that is higher than SnO2 material,suggesting 3D laminated CuO/SnO2 is an effective ca ndidate material served as sensor platform to detect low-concentration amines.

关键词： Tin oxide CuO dopant p-n heterostructure Triethylamine Gas sensing

Separation of CO_2/CH_4 and CH_4/N_2 mixtures using MOF-5 and Cu_3(BTC)_2

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Journal of Energy Chemistry 2014年第4期23卷 453-460页

作者： Junmin li Jiangfeng Yang libo li jinping li Research Institute of Special Chemicals Taiyuan University of Technology

In this paper we used MOF-5 and Cu3（BTC）2 to separate CO2/CH4 and CI-I4/N2 mixtures under dynamic conditions. Both materials were synthesized and pelletized, thus allowing for a meaningful characterization in view of process scale-up. The materials were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. By performing breakthrough experiments, we found that Cu3（BTC）2 separated CO2/CH4 slightly better than MOF-5. Because the crystal structure of Cu3 （BTC）2 includes unsaturated accessible metal sites formed via dehydration, it predominantly interacted with CO2 molecules and more easily captured them. Conversely, MOF-5 with a suitable pore size separated CH4/N2 more efficiently in our breakthrough test.

关键词： adsorption separation metal organic framework gas mixtures

A full-scale field experiment to study the thermal-deformation process of widening highway embankments in permafrost regions

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Research in Cold and Arid Regions 2021年第2期13卷 123-132页

作者： ShuangJie Wang Long Jin Kun Yuan DongGen Chen jinping li Yi Song State Key Laboratory of Road Engineering Safety and Health in High-altitude Regions CCCC First Highway Consultants Co.LTDXi'anShaanxi 710075China Institute of Earth Environment Chinese Academy of SciencesXi'anShaanxi 710061China College of Science and Engineering University of TasmaniaHobart 7005Australia

As one of the widely used upgrading way in road engineering, the widening embankment(WE) has suffered evident differential deformation, which is even severer for highway in permafrost regions due to the temperature sensitivity of frozen soil and the heat absorption effect of the asphalt pavement. Given this issue, a full-scale experimental highway of WE was performed along the Qinghai-Tibet Highway(QTH) to investigate the differential deformation features and its developing law. The continuous three years' monitoring data taken from the experimental site, including the ground temperature and the layered deformation of WE and original embankment(OE), were used to analyze the thermal-deformation process. The results indicate that the widening part presented the remarkable thermal disturbance to the existing embankment(EE). The underlying permafrost was in a noteworthy degradation state, embodying the apparent decrease of the permafrost table and the increase of the ground temperature. Correspondingly, the heat disruption induced by widening led to a much higher deformation at the widening side compared to the original embankment, showing a periodic stepwise curve. Specifically, the deformation mainly occurred in the junction of the EE and the widening part, most of which was caused by the thawing consolidation near the original permafrost table. In contrast, the deformation of EE mainly attributed to the compression of the active layer. Furthermore, it was the deformation origination differences that resulted in the differential deformation of WE developed gradually during the monitoring period, the maximum of which reached up to 64 mm.

关键词： widening embankment permafrost deformation in-situ experiment

Increased substitution rate in H5N1 avian influenza viruses during mass vaccination of poultry

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Chinese Science Bulletin 2012年第19期57卷 2419-2424页

作者： WANG ZhaoGuo JIANG WenMing liU Shuo HOU GuangYu li jinping WANG ZhiYu CHEN JiMing College of Public Health Shandong UniversityJinan 250012China China Animal Health and Epidemiology Center Qingdao 266032China

As a means of heated debate,mass vaccination of poultry has been used in some countries to control H5N1 highly pathogenic avian influenza(HPAI),which remains of global economic and public health ***,mass vaccination can act as an evolutionary selective force facilitating the emergence of vaccine-resistant viruses,similar to that widespread use of antibiotics facilitates the emergence of antibiotic-resistant *** support the hypothesis,the substitution rates in the two subunits,HA1 and HA2,of the viral hemagglutinin gene,were calculated using a Bayesian Markov Chain Monte Carlo(MCMC) *** was found that the rate in the HA1 subunit,but not in the HA2 subunit,increased significantly during periods of mass vaccination(2005 2010 in China and 2003 2009 in Indonesia),in contrast to the periods when no mass vaccination programs took place(1996 2004 in China and 2004 2008 in Thailand).Because substitutions in the HA1 subunit rather than in the HA2 subunit can lead to vaccine-resistant viruses,the results support that mass vaccination programs facilitate the emergence of vaccine-resistant viruses,which,in turn,will render mass vaccination programs less ***,caution must be taken when adopting mass vaccination as a long-term strategy to control HPAI.

关键词： H5N1禽流感病毒接种疫苗替代率家禽高致病性禽流感疫苗接种公共卫生意义血凝素基因

Extraction of Aluminum and Iron from Boiler Slag by Sulfuric Acid

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Wuhan University Journal of Natural Sciences 2007年第3期12卷 541-547页

作者： li jinping HOU Haoboi GAN Jinhua ZHU Shujing XIE Yongjie School of Resource and Environmental Science Wuhan University Wuhan 430079 Hubei China Yangtze River Fisheries Research Institute Chinese Academy of Fishery Sciences Jingzhou 434000 Hubei China

This paper presents a new method of recycling aluminum and iron in boiler slag derived from plants that use coal as fuel. The new method integrates efficient extraction and reuse of the leached pellets together. An elemental analysis of aqueous solutions leached by sulfuric acid was determined by EDTA-Naz-ZnCl2 titration method. The components and microstructures of the samples were examined by means of XRF, XRD and SEM. An aluminum extraction efficiency of 86.50% was achieved when the sintered pellets were leached using 4 mol · L^- 1 H2SO4 at solid/ liquid [m（g）/V（mL）] ratio of 1 ： 5 at 80 ℃ for 24 h. An iron extraction efficiency of 94.60% was achieved in the same conditions for the maximum extraction efficiency of Al. The extraction efficiencies of Al and Fe increased with an increase in temperature, leaching time and acidity. The concentration of alumina and iron hydroxide in the final product was determined to be 99.12% and 92.20% respectively. This product of alumina would be used directly for the production of metallic aluminum.

关键词： boiler slag Al extraction efficiency Fe extraction efficiency leaching alumina

Valence electron structure and properties of the ZrO_2

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Science China(Technological Sciences) 2008年第11期51卷 1858-1866页

作者： li jinping, MENG SongHe, HAN JieCai & ZHANG XingHong Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China Center for Composite Materials Harbin Institute of Technology Harbin China

To reveal the properties of ZrO2 at the atom and electron levels, the valence elec- tron structures of three ZrO2 phases were analyzed on the basis of the empirical electron theory of solids and molecules. The results showed that the hybridization levels of Zr and O atoms in the m-ZrO2 were the same as those in the t-ZrO2, while those in the c-ZrO2 rose markedly. The electron numbers and bond energies on the strongest covalent bonds in the m-ZrO2 phase were the greatest, the values were 0.901106 and 157.5933 kJ/mol, respectively. Those in the t-ZrO2 phase took second place, which were 0.722182 and 123.9304 kJ/mol, and those in the c-ZrO2 phase were the smallest, which were 0.469323 and 79.0289 kJ/mol. According to the product of the bond energy on the strongest covalent bond and equivalent bond number (this value reflected the crystal cohesive energy), the order from the greatness to smallness was the c-ZrO2> t-ZrO2 > m-ZrO2. This showed that the m-phase bonds were the tightest, their energy was the smallest, the crystal cohe- sive energy of the m-phase was the largest, and the m-phase existed most stably at room temperature. So it must need energy or higher temperature to take apart the stronger covalent bonds to form a new phase.

关键词： ZrO2 empirical electron theory bond length difference valence electron structure properties

Valence electron structure and properties of stabilized ZrO_2

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Science China(Technological Sciences) 2008年第7期51卷 1008-1016页

作者： li jinping, HAN JieCai, MENG SongHe & ZHANG XingHong Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China Center for Composite Materials Harbin Institute of Technology Harbin China

To reveal the properties of stabilizers in ZrO2 on nanoscopic levels, the valence electron structures of four stable ZrO2 phases and c-ZrO2 were analyzed on the basis of the empirical electron theory of solids and molecules. The results showed that the hybridization levels of Zr atoms in c-ZrO2 doped with Ca and Mg dropped from B17 to B13, the hybridization levels of Zr atoms in c-ZrO2 doped with Y and Ce dropped from B17 to B15, and that the four stabilizing atoms all made the hybridization levels of O atoms drop from level 4 to level 2. The numbers of covalent electrons in the strongest covalent bond in the descending order are c-ZrO2>Zr0.82Ce0.18O2> Zr0.82Y0.18O1.91>Zr0.82Mg0.18O1.82>Zr0.82Ca0.18O1.82. The bond energies of the strongest covalent bond and the melting points of the solid solutions in the descending order are Zr0.82Ce0.18O2> c-ZrO2>Zr0.82Y0.18O1.91>Zr0.82Mg0.18O1.82>Zr0.82Ca0.18O1.82. The percent-ages of the total number of covalent electrons in the descending order are c-ZrO2>Zr0.82Y0.18O1.91> Zr0.82Ce0.18O2>Zr0.82Mg0.18O1.82> Zr0.82Ca0.18O1.82. From the above analysis, it can be concluded that the stabilizing degrees of the four stabilizers in the descending order are CaO> MgO>Y2O3>CeO2.

关键词： c-ZrO2 empirical electron theory bond length difference valence electron structure properties

Valence electron structure and bonding features of RuB2 and OSB2: The empirical electron theory calculations

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Science China(Technological Sciences) 2010年第7期53卷 1877-1885页

作者： LUO XiaoGuang, li jinping, HU Ping & DONG Shanliang Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China Center for Composite Materials Harbin Institute of Technology Harbin China

The valence electron structure (VES) of RuB2 and OsB2 were calculated by the empirical electron theory (EET) of solids and molecules and compared with the results derived from the first-principles calculations. The distributions of covalent electrons in different bonds indicate that B-B and B-Me have remarkably covalent bonding characters. Lattice electrons cruising around Me-Me layers are found to have great influences on electronic conductivity and high temperature plasticity. The ultra-high values of elastic constant Cn in the two compounds originate from close-packed covalent bonding along the c axis. Uneven bond strengths and distributions of covalent bonds, especially for B-Afe bonds, yield significant anisotropy. Low ratios of lattice electrons to covalent electrons suggest the intrinsic embrittlement in crystals. The fact that the calculated cohesive energies well agree with experimental results demonstrates the good suitability of the EET calculations in estimating cohesive energy for transition-metal borides.

关键词： empirical electron theory (EET) of solid and molecules valence electron structure (VES) cohesive energy anisotropy diborides of ruthenium and osmium (RuB2 and OsB2)

Origin and future distribution of the new A (H1N1) influenza virus emerging in North America in 2009

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Chinese Science Bulletin 2009年第13期54卷 2174-2178页

作者： CHEN JiMing SUN YingXue liU Shuo JIANG WenMing CHEN Jie HOU GuangYu li jinping China Animal Health and Epidemiology Center Qingdao 266032 China

The origin of the new A (H1N1) influenza virus recently emerging in North America is a hot controversial topic of significance in disease control and risk *** experts claimed that it was an unusually mongrelized mix of human,avian and swine influenza viruses,while some others concluded that it was totally a simple re-assortment hybrid of two lineages of swine influenza *** the phylogenetic diversity of the viral PB1,PA and PB2 gene sequences using online web servers,and the results suggest that all the 8 genetic segments of the new virus were possibly from two lineages of swine influenza viruses,and one of the lineage was a mongrelized mix of human,avian and swine influenza viruses emerging in the world approximately 10 years *** the recent epidemiological trends of the new virus,we believe it will spread more widely in the world and persist long in human *** also could spread among swine *** future wide spreading of the new virus may coincide the disappearance of a subtype of previous human influenza A virus.

关键词：猪流感病毒北美系统发育多样性禽流感病毒分配网络服务器新病毒风险评估