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Journal of Natural Gas Chemistry 2010年第2期19卷 117-122页

作者： Ning Wang Wei Chu liqiong Huang Tao Zhang Department of Architecture and Environment Sichuan University Chengdu 610065 Sichuan China Department of Chemical Engineering Sichuan University Chengdu 610065 Sichuan China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China

The Co-incorporated Ce1-xZrxO2 catalysts were prepared by co-precipitation for carbon dioxide reforming of *** ratio of Ce to Zr was varied to optimize the performances of co-precipitated Co-Ce-Zr-Ox *** prepared catalysts were characterized by various physico-chemical characterization techniques including TPR,X-ray diffraction,N2 adsorption at low temperature,XPS and *** co-precipitated Co-Ce0.8Zr0.2O2 sample containing 16% CoO exhibited a higher catalytic activity among the five catalysts,and the activity was maintained without significant loss during the reaction for 60 *** the conditions of 750 ℃,0.1 MPa,36000 ml/（h gcat）,and CO2/CH4 molar ratio of 1：1,the CO2 conversion over this catalyst was 75% while the CH4 conversion was 67%.The cubic Ce0.8Zr0.2O2 facilitated a higher dispersion and a higher reducibility of the cobalt component,and the apparent activation energy for Co-Ce0.8Zr0.2O2 sample was 49.1 kJ/mol in the CO2/CH4 reforming *** a result,the Co-Ce0.8Zr0.2O2 sample exhibited a higher activity and stability for the reforming of CH4 with CO2.

关键词： Ce1-xZrxO2 carbon dioxide methane dry reforming Co-incorporated catalyst characterization

Effects of polydopamine modification on self-grown Cu O cube anodes in lithium-ion batteries

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Science China(Technological Sciences) 2016年第4期59卷 667-672,1-4页

作者： HAO LiHua WU liqiong JIA ZhiQi ZHAO YongXiang LI XinHeng College of Chemistry and Chemical Engineering Shanxi University State Key Laboratory for Oxo Synthesis and Selective Oxidation Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP)

We report the synthesis of Cut cubes with well-defined size and shape by thermal treatments of Cu2O cubes. Polydopamine （PDA） is introduced to modify the Cut cubes by the in-situ polymerization of the dopamine precursor. The initial specific ca- pacity of the lithium-ion batteries using the Cut cubes as anodes increases about 10 times at a 0.5 C rate as a result of the modification of PDA. The overall specific capacity for 100 cycles also increases effectively due to the introduction of PDA. So PDA as surface modifying agent significantly improves the electrochemical performance of the Cut anodes.

关键词： lithium anode materials copper oxides polydopamine modification specific capacity in-situ polymerization

Changes in aggregate-associated organic carbon and nitrogen after 27 years of fertilization in a dryland alfalfa grassland on the Loess Plateau of China

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Journal of Arid Land 2015年第4期7卷 429-437页

作者： ZHANG liqiong WEI Xiaorong HAO Mingde ZHANG Meng College of Natural Resources and Environment Northwest A&F University College of Agriculture and Life Sciences Ankang University State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau Northwest A&F University

Changes in the distribution of soil aggregate sizes and concentrations of aggregate-associated organic carbon （OC） and nitrogen （N） in response to the fertilization of grasslands are not well understood. Understanding these changes is essential to the sustainable development of artificial grasslands. For understanding these changes, we collected soil samples at 0-20 and 20-40 cm depths from a semi-arid artificial alfalfa grassland after 27 years of applications of phosphorus （P） and nitrogen＋phosphorus＋manure （NPM） fertilizers on the Loess Pla- teau of China. The distribution of aggregate sizes and the concentrations and stocks of OC and N in total soils were determined. The results showed that NPM treatment significantly increased the proportions of 〉2.0 mm and 2.0-0.25 mm size fractions, the mean geometric diameter （MGD） and the mean weight diameter （MWD） in the 0-20 cm layer. Phosphorous fertilizer significantly increased the proportion of 〉2.0 mm size fractions, the MGD and the MWD in the 0-20 cm layer. Long-term application of fertilization （P and NPM） resulted in the accumulation of OC and N in soil aggregates. The largest changes in aggregate-associated OC and N in the 0-20 cm layer were found at the NPM treatment, whereas the largest changes in the 20-40 cm layer were found at the P treatment. The results suggest that long-term fertilization in the grassland leads to the accumulation of OC and N in the coarse size fractions and the redistribution of OC and N from fine size fractions to coarse size fractions.

关键词： alfalfa grassland long-term fertilization nitrogen organic carbon semi-arid Loess Plateau

Effect of particle size on the thermal performance of NaNO3/SiC)2/C composite phase-change materials

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Particuology 2019年第3期17卷 169-175页

作者： Liang Liu liqiong Wang Weichun Ge Yanfeng Ge Yun Huang State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China State Grid Liaoning Electric Power Supply Co. Ltd. Shenyang 110004 China

Storage of thermal energy is a key technology for energy conservation and application of renewable energy sources. In this paper, the thermal performance of inorganic composite phase-change materials (PCMs;NaNO3/SiO2/C) is studied under extreme thermal conditions and the effect of raw particle size is examined. We designed a thermal shock test platform with a diffusive combustion system and in-situ infrared thermal imaging. The influences of the heat flux magnitude and exposure time on the performance of the PCMs were examined under vertical thermal shock conditions. Leakage of molten salt in the composite PCMs was observed as the heat flux reached a threshold point. The morphology and thermal properties were characterized by ex-situ SEM, XRD, DSC, and BET. Raw particles with sizes in the range of 105-500 μm were used to synthesize the composite material and examine its role in thermal shock behavior. Our experiments showed that deterioration of the thermal storage density was slowed as the particle size was increased. This work provides useful guidance for improving the anti-thermal shock ability of future material designs.

关键词： Thermal storage Phase change material Particle size Thermal shock Decomposition temperature

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Science China Mathematics 2013年第4期56卷 803-810页

作者： LIN liqiong ZHONG HuaiJie ZHANG YunNan College of Mathematics and Computer Science Fuzhou University School of Mathematics and Computer Science Fujian Normal University Mathematics and Information Science College Hebei Normal University

This paper studies the similarity invariants of operators on a class of Gowers-Maurey spaces, ∑dc spaces, where an infinite dimensional Banach space X is called a ∑dc space if for every bounded linear operator on X the spectrum is disconnected unless it is a singleton. It shows that two strongly irreducible operators T1 and T2 on a ∑dc space are similar if and only if theK0-group of the commutant algebra of the direct sum T1 GT2 is isomorphic to the group of integers Z. On a ∑dc space X, it uses the semigroups of the commutant algebras of operators to give a condition that an operator is similar to some operator in （∑SI）（X）, it further gives a necessary and sufficient condition that two operators in （∑SI）（X） are similar by using the ordered K0-groups. It also proves that every operator in （∑SI）（X） has a unique （SI） decomposition up to similarity on a ∑dc space X, where （∑SI）（X） denotes the class of operators which can be written as a direct sum of finitely many strongly irreducible operators.

关键词： Gowers-Maurey spaces strongly irreducible operators K0-groups commutant algebras

The approximate Jordan forms of operators on Σ_e^1 type Banach spaces

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Science China Mathematics 2011年第4期54卷 723-740页

作者： ZHANG YunNan LIN liqiong ZHONG HuaiJie School of Mathematics and Computer Science Fujian Normal UniversityFuzhou 350007China Mathematics and Information Science College Hebei Normal UniversityShijiazhuang 050016China College of Mathematics and Computer Science Fuzhou UniversityFuzhou 350002China

This paper studies the structure of operators on Σ1e type Banach *** solves the problem of the small compact perturbations of operators with connected ***,it shows that every operator with a connected spectrum on separable Σ1e type Banach spaces is a small compact perturbation of a strongly irreducible *** on this result,this paper establishes the approximate Jordan forms of operators on Σ1e type Banach spaces with Schauder bases.

关键词： Σ1e type Banach spaces strongly irreducible operators operators with connected spectra approximate Jordan forms

Synthesis and Activity Evaluation of Novel Prenylated Flavonoids as Antiproliferative Agents

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Chemical Research in Chinese Universities 2018年第4期34卷 564-570页

作者： Kingsadingthongkham VONGDETH RAN liqiong YAN Lili WANG Qiuan College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China Department of Chemistry Faculty of Natural Sciences National University of Laos Vientiane R O. BOX7322 Lao R D. R

Twenty prenylated flavonoids 1-20 were synthesized by glycoside hydrolysis, dehydrogenation, selective O-methylation, O-prenylation and Claisen rearrangement reaction, from abundant and inexpensive natural flavonoids naringin, hespiredin, quercetin and myricetin. Among them, 1-7, 10-15 and 17-20 are novel compounds, the natural product 3,3＇,4＇,7-tetramethoxy-8-prenyl-5-hydroxy flavonoid（16） was synthesized in a high yield. Their antiprolirative activities were evaluated in vitro on a panel of three human cancer cell lines（HeLa, HCC1954 and SK-OV-3）. The results show that most of the target compounds displayed moderate to potent antiprolirative activities against the three cancer cells with half maximal inhibitory concentration（ICs0） values from 0.49 μmol/L to 95.07 μmol/L. Among them, 3′,4′,7-trimethoxyl-5-hydroxyl-8-prenyl flavonoid（12） exhibited the strongest antiprolirative activity against the three cancer cells mentioned above with IC50 values of 0.91-7.08 μmol/L. 3′,7-Dimethoxy-5-O- prenyl flavone（6） and 3′,4′,7-trimethoxy-5-O-prenyl flavone（10） showed selective antiproliferative activity against HCC1954 cells with TC50 value of 0 49 and 5 .32μmol/L, respectively.

关键词： Prenylated flavonoid Claisen rearrangement Antiproliferative activity Cancer cell

Estimation of the amount of erosion at unconformities in the last stage of the Eocene Sanduo period in the Subei Basin,China

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Petroleum Science 2009年第4期6卷 383-388页

作者： Chen liqiong Jiangsu Oilfield Company,SINOPEC,Jiangsu 225009,China Jiangsu Oilfield Company SINOPEC Jiangsu China

Strata erosion is a widespread phenomenon in sedimentary basins. The generation, migration, and accumulation of hydrocarbon is influenced by the scale of erosion, so estimating the amount of erosion is essential in the analysis of oil and gas bearing basins. According to the geological features in the Subei Basin and the actual data, using the integrated method, we estimated the level of erosion at the unconformities caused by the Sanduo event. By using the mudstone interval transit time method and the vitrinite reflectance method on data from typical wells, it can be concluded that the Gaoyou, Jinhu, and Hongze depressions suffered strong strata erosion from the late Eocene to Oligocene, and the total strata erosion thickness was 300–1,100 m. Different tectonic units in the same depression have extremely uneven erosion intensity: the low convex regions have the maximum erosion thickness, amounting to 800–1,100 m; the slope regions have an erosion thickness of generally 600–800 m; the erosion thickness of the slope-hollow transition zone is 300–500 m. For the whole basin, we used the strata thickness trend analysis method combined with the interval transit time and vitrinite reflectance methods to estimate the erosion thickness in the Sanduo period. The results show that the most severe erosion of the Sanduo event in the Subei Basin is between 1,000 m to 1,200 m, mainly located in depressions around the Jianhu Uplift; the deep hollow area has the least erosion, generally about 300–600 m, and the erosion in the slope area is about 600–900 m. Compared with the northern part, the southern part has relatively little erosion. It is also proved that the Sanduo movement has heterogeneous intensity, and the western region has greater intensity than the eastern region.

关键词： Unconformity estimation of erosion mudstone interval transit time method vitrinite reflectance method Subei Basin

Preparation of novel Ni-Ir/γ-Al_2O_3 catalyst via high-frequency cold plasma direct reduction process

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Journal of Natural Gas Chemistry 2009年第1期18卷 35-38页

作者： liqiong Huang Wei Chu Tao Zhang YongxiangYin Xumei Tao Department of Chemical Engineering Sichuan University Chengdu 610065 Sichuan China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China

The novel Ni-Ir/γ-Al2O3 catalyst, denoted as NIA-P, was prepared by high-frequency cold plasma direct reduction method under ambient conditions without thermal treatment, and the conventional sample, denoted as NIA-CR, was prepared by impregnation, thermal calcination, and then by H2 reduction method. The effects of reduction methods on the catalysts for ammonia decomposition were studied, and they were characterized by XRD, N2 adsorption, XPS, and H2-TPD. It was found that the plasma-reduced NIA-P sample showed a better catalytic performance, over which ammonia conversion was 68.9%, at T = 450℃, P = 1 atm, and GHSV = 30, 000 h^-1. It was 31.7% higher than that of the conventional NIA-CR sample. XRD results showed that the crystallite size decreased for the sample with plasma reduction, and the dispersion of active components was improved. There were more active components on the surface of the NIA-P sample from the XPS results. This effect resulted in the higher activity for decomposition of ammonia. Meanwhile, the plasma process significantly decreased the time of preparing catalyst.

关键词： high-frequency cold plasma jet Ni-Ir catalyst direct reduction ammonia decomposition hydrogen production

Natural polysaccharide-based smart CXCR4-targeted nano-system for magnified liver fibrosis therapy

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Chinese Chemical Letters 2024年第2期35卷 341-346页

作者： liqiong Sun Xinping Luo Chenxi Zhou Zhanwei Zhou Minjie Sun College of Horticulture Nanjing Agricultural UniversityNanjing 210095China NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients State Key Laboratory of Natural MedicinesDepartment of PharmaceuticsChina Pharmaceutical UniversityNanjing 210009China

Activated hepatic stellate cells(aHSCs),the main source of extracellular matrix deposition,are key targets in liver ***,no effective drug specific to aHSCs has been clinically applied due to poor drug delivery ***,we designed a CXC chemokine receptor 4(CXCR4)-targeted reactive oxygen species(ROS)-responsive platform AMD-Dex-ROS-responsive-sorafenib(ARS)based on natural polysaccharide and thioctic acid frame,which can deliver anti-fibrosis drug represented by sorafenib specifically to aHSCs on account of CXCR4 over-expression on aHSCs,and smartly disassemble via ROS-responsive thioketal rupture relying on high intracellular ROS in HSCs,realized on-demand drug release and effective liver fibrosis ***,in this platform,the CXCR4 antagonist AMD3100 not only enhanced aHSCs targeting efficiency of sorafenib but also effectively magnified the aHSCs elimination of sorafenib by blocking stroma cell derived factor-1(SDF-1)/CXCR4-induced aHSCs protection,resulting in synergistic anti-fibrosis *** platform provided a new approach for drug delivery system design and liver fibrosis treatment.

关键词： Nanoparticle CXCR4 antagonism ROS-responsive Hepatic stellate cells Liver fibrosis