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Carbon-coated cubic-phase molybdenum carbide nanoparticle for enhanced photocatalytic H2-evolution performance of TiO_(2)

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Journal of Energy Chemistry 2020年第12期29卷 253-261页

作者： jinfeng Liu ping Wang jiajie fan Huogen Yu School of Materials Science and Engineering Wuhan University of Technology.122#Luoshi RoadWuhan 430070HubeiChina School of Chemistry Chermical Engineering and Life SciencesWuhan University of Technology122#Luoshi RoadWuhan 430070HubeiChina School of Materials Science and Engineering Zhengzhou University100 Science AvenueZhengzhou 450002HenanChina

Conventional hexagonal dimolybdenum carbide(Mo2 C) as a good cocatalyst has been widely applied for the enhanced photocatalytic hydrogen production of various photocatalysts. Compared with the hexagonal Mo2 C, however, the investigation about cubic molybdenum carbide(Mo C) is still very limited in photocatalytic field. In this study, carbon-coated cubic molybdenum carbide(MoC@C) nanoparticle was synthesized and used as an effective cocatalyst to improve the H2-evolution efficiency of Ti O2. The cubic MoC@C can be obtained by adjusting the mass ratio of C3 N3(NH2)3 to(NH4)6 Mo7 O(24)(2:1) and controlling the calcination temperature to 800 °C. When the above cubic MoC@C nanoparticles were evenly loaded on the Ti O2 via a sonication-assisted deposition, a homogeneous composite of TiO2/MoC@C was formed due to the strong coupling interface between TiO2 and cubic MoC nanoparticles. More importantly, the highest H2-production rate of Ti O-12/MoC@C reached 504 μmol hg^(-1)(AQE=1.43%), which was 50 times as high as that of the pure TiO2. The enhanced performance of TiO2/MoC@C can be attributed to the synergistic effect of carbon layer as an electron mediator and the cubic MoC as interfacial H2-evolution active sites. This work provides a feasible guideline to develop high-efficiency Mo-based cocatalysts for potential applications in the H2-evolution field.

关键词： TiO_(2) Cubic MoC@C Cocatalyst H_(2)production Photocatalysis

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Study on precision piezoelectric rotary step motors with inner anchor/loosen and outer drive

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Frontiers of Electrical and Electronic Engineering in China 2008年第3期3卷 364-369页

作者： Jianfang LIU Zhigang yang ping ZENG Zunqiang fan Chain Transmission Laboratory Jilin UniversityChangchun 130022China

A new precision rotary piezoelectric(PZT)actuator is proposed to improve its drive *** on piezoelectric technology,the actuator adopts the principle of bionics,with a new method of stator inner anchor/loosen/rotor outer drive and a distortion structure of a thin shelf flexible *** structure improves the stability of the anchor/loosen and step *** characteristics are evaluated by finite element *** experiment shows that the new rotary PZT actuator works with higher frequency(40 Hz),higher speed(325 mrad/s),wider movement(360u),high resolution(1 mrad/step)and high torque(30 N?cm).The novel actuator can be applied in wide movement and high resolution driving devices such as those for optics engineering,precision positioning and some other micro-manipulation fields.

关键词： piezoelectric element stator inner anchor/loosen rotor outer drive thin shelf flexible hinge resolution

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Relationship between circulating irisin levels and overweight/obesity: A meta-analysis

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World Journal of Clinical Cases 2019年第12期7卷 1444-1455页

作者： Jue Jia fan Yu Wei-ping Wei ping yang Ren Zhang Yue Sheng Yong-Qin Shi Affiliated Hospital of Jiangsu University Zhenjiang 212001 Jiangsu Province China Department of Library of Jiangsu University Zhenjiang 212001 Jiangsu Province China

BACKGROUND Currently, the findings about irisin as a novel myokine related to obesity are inconsistent in overweight/obese people. To our knowledge, no systematic analysis has been conducted to evaluate the relationship between irisin levels and overweight/obesity. AIM To evaluate the association between circulating irisin levels and overweight/obesity. METHODS The Cochrane Library, MEDLINE, SCOPUS, and the ISI Web of Science were searched to retrieve all of the studies associated with circulating irisin levels and overweight/obesity. Standard mean difference values and 95% confidence intervals (CI) were estimated and pooled using meta-analysis methodology. RESULTS A total of 18 studies were included in our meta-analysis containing 1005 cases and 1242 controls. Our analysis showed that the circulating irisin level in overweight/obese people was higher than that in overall healthy controls (random effects MD = 0.63;95%CI: 0.22-1.05;P = 0.003). In the subgroup analysis by ethnicity, the irisin level was higher in overweight/obesity people than that in controls in Africa (random effects MD = 3.41;95%CI: 1.23-5.59;P < 0.05) but not in European, Asian, or American populations. In addition, in a subgroup analysis by age, the results showed that obese children exhibited a higher irisin level than controls (random effects MD = 0.86;95%CI: 0.28-1.43;P < 0.05). CONCLUSION This meta-analysis provides evidence that circulating irisin is higher in obese individuals compared to healthy controls and it is important to identify the relationship between circulating irisin levels and overweight/obesity in predicting overweight/obesity.

关键词： Irisin Overweight/obesity Myokines Body mass index

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Effects of cyclodextrins on hydrolysis of malathion

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Journal of Environmental Sciences 2006年第3期18卷 572-576页

作者： ZHANG An-ping LUO fan CHEN Sheng-wen LIU Wei-ping Institute of Environmental Science Zhejiang University Hangzhou 310029 China Research Center of Green Chirality College of Biological and Environmental Engineering Zhejiang University of Technology Hangzhou 310032 China

Cyclodextrins （CDs）, with hydrophobic interior cavity and hydrophilic external surface, are capable of accelerating or inhibiting chemical degradation of organophosphorus pesticides through forming inclusion complexes between CDs and pesticides. This work evaluated the effects of CDs on hydrolysis of malathion in an attempt to assess their potential application in environmental approach. β-CD and its two derivatives, randomly methylated β-CD （RAMEB） and hydroxypropyl β-CD （HP-β-CD）, were tested. It was found that RAMEB could inhibit the hydrolysis of malathion, and this was the function of pH and temperature, the inhibitory effects increase with increasing concentration of RAMEB and elevating temperature between 15 and 35℃. On the other hand, β-CD and HP-β-CD have little or no stabilizing effects on malathion at all pH and temperature studied, except that the large concentration of β-CD and HP- β-CD can mildly reduce hydrolysis of malathion. Both 2 mol/L and 5 mol/L urea increase the inhibitory effects of RAMEB on hydrolysis of malathion at 25℃, oH 9.0.

关键词： cyclodextrin malathion hydrolysis urea

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Improved electrochemical performance of ternary Sn-Sb-Cu nanospheres as anode materials for lithium-ion batteries

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Rare Metals 2020年第10期39卷 1159-1164页

作者： Rong yang Xiang-Jun Zhang Teng-Fei fan Dan-ping Jiang Qi Wang Research&Development Centre for Vehicle Battery and Energy Storage General Research Institute for Nonferrous MetalsBeijing 100083China

Ternary Sn-Sb-Cu alloy nanoparticles were successfully synthesized via co-reduction of metal chlorides in aqueous alkaline *** results of the transmission electron microscopy(TEM)show that the as prepared Sn-Sb-Cu nanoparticles have a specific hollow structure with a uniform particle size of 10-20 *** there are not any hard templates in the synthesis system,a galvanic displacement reaction mechanism is proposed to account for the formation of the hollow *** the alloy powders are used as anode materials for lithium-ion batteries,they exhibit relatively high electrochemical capacity and good cyclic *** good electrochemical performance can be attributed to the inactive Cu *** electrochemical reactions,the inactive copper phase in the hollow structure serves as a soft and ductile matrix,which alleviates the mechanical stresses caused by the severe volume change during lithium insertion and *** their high reversible capacities,the Sn-Sb-Cu alloys are a promising candidate as the anode material of rechargeable lithium-ion batteries.

关键词： Sn-Sb-Cu alloy Hollow nanospheres Anode materials Lithium-ion batteries

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Chemokines and hepatocellular carcinoma

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World Journal of Gastroenterology 2010年第15期16卷 1832-1836页

作者： Huang, fan Geng, Xiao-ping Anhui Med Univ Affiliated Hosp 1 Dept Hepatobiliary Surg Hefei 230022 Anhui Peoples R China

Chemokines play a paramount role in tumor progres-sion. In hepatocellular carcinoma (HCC) progression, chemokines and their receptors play an intricate role. Currently, chemokines and their receptors such as the CXCL12-CXCR4 axis, CX3CL1-CX3CR1 axis and the CCL20-CCR6 axis have received much research attention. Although a large number of studies show that these axes are strongly associated with HCC, the exact mechanism by which these axes promote the growth and progression of HCC remains unknown. In this paper, several chemokines and their receptor interactions in HCC progression, growth and metastasis and immune response to HCC are reviewed.

关键词： Chemokines Hepatocellular carcinoma

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Effects of reclaimed water irrigation and nitrogen fertilization on the chemical properties and microbial community of soil

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Journal of Integrative Agriculture 2017年第3期16卷 679-690页

作者： GUO Wei Mathias N Andersen QI Xue-bin LI ping LI Zhong-yang fan Xiang-yang ZHOU Yuan Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences (CAA S) Xinxiang 453003 P.R. China Graduate School of Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China Department of Agroecology Faculty of Science and Technology Aarhus University Tjele 8830 Denmark Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources of CAAS Xinxiang 453003 P.R. China

The ecological effect of reclaimed water irrigation and fertilizer application on the soil environment is receiving more *** microbial activity and nitrogen（N）levels are important indicators of the effect of reclaimed water irrigation on *** study evaluated soil physicochemical properties and microbial community structure in soils irrigated with reclaimed water and receiving varied amounts of N *** results indicated that the reclaimed water irrigation increased soil electrical conductivity（EC）and soil water content（SWC）.The N treatment has highly significant effect on the ACE,Chao,Shannon（H）and Coverage *** on a 16S ribosomal RNA（16S rRNA）sequence analysis,the Proteobacteria,Gemmatimonadetes and Bacteroidetes were more abundant in soil irrigated with reclaimed water than in soil irrigated with clean *** clustering of microbial communities using either clean or reclaimed water for irrigation indicated that the type of irrigation water may have a greater influence on the structure of soil microbial community than N fertilizer *** on a canonical correspondence analysis（CCA）between the species of soil microbes and the chemical properties of the soil,which indicated that nitrate N（NO3-–-N）and total phosphorus（TP）had significant impact on abundance of Verrucomicrobia and Gemmatimonadetes,meanwhile the p H and organic matter（OM）had impact on abundance of Firmicutes and Actinobacteria *** was beneficial to the improvement of soil bacterial activity and fertility under 120 mg kg^-1 N with reclaimed water irrigation.

关键词： reclaimed water nitrogen soil chemical properties 16S rRNA sequence soil microbe community

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Probing the dark side of the Universe with weak gravitational lensing effects

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Research in Astronomy and Astrophysics 2014年第9期14卷 1061-1120页

作者： Li-ping Fu Zu-Hui fan Shanghai Key Lab for Astrophysics Shanghai Normal University Department of Astronomy School of Physics Peking University

Arising from gravitational deflections of light rays by large-scale struc- tures in the Universe, weak-lensing effects have been recognized as one of the most important probes in cosmological studies. In this paper, we review the main progress in weak-lensing analyses, and discuss the challenges in future investigations aiming to understand the dark side of the Universe with unprecedented precisions.

关键词： cosmology: dark matter and dark energy -- large-scale structure of uni- verse -- gravitational lensing

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Operation Cost Optimization Method of Regional Integrated Energy System in Electricity Market Environment Considering Uncertainty

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Journal of Modern Power Systems and Clean Energy 2023年第1期11卷 368-380页

作者： Peng Li fan Zhang Xiyuan Ma Senjing Yao Yuhang Wu ping yang Zhuoli Zhao Loi Lei Lai Digital Grid Research Institute of China Southern Power Grid Guangzhou 510663China Guangdong Key Laboratory of Clean Energy Technology South China University of TechnologyGuangzhou 510640China Department of Electrical Engineering School of AutomationGuangdong University of TechnologyGuangzhou 510006China IEEE

In the electricity market environment,the regional integrated energy system(RIES)can reduce the total operation cost by participating in electricity market ***,the RIES will face the risk of load and electricity price uncertainties,which may make its operation cost higher than *** paper proposes a method to optimize the operation cost of the RIES in the electricity market environment considering ***,based on the operation cost structure of the RIES in the electricity market environment,the energy flow relationship of the RIES is analyzed,and the operation cost model of the RIES is ***,the electricity purchase costs of the RIES in the medium-and long-term electricity markets,the spot electricity market,and the retail electricity market are ***,considering the risk of load and electricity price uncertainties,the operation cost optimization model of the RIES is established based on conditional *** it is solved to obtain the operation cost optimization strategy of the *** results show that the proposed operation cost optimization method can reduce the operation cost of high electricity price scenario by optimizing the energy purchase and distribution strategy,constrain the risk of load and electricity price uncertainties,and help balance the risks and benefits.

关键词： Conditional value-at-risk electricity market uncertainty operation cost regional integrated energy system(RIES).

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Lubricating properties of ester oil prepared from bio-based 2,5-furandicarboxylic acid

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Friction 2020年第2期8卷 360-369页

作者： Mingjin fan Jia Al Shuai ZHANG Chenlu yang Xin DU ping WEN Xiangyuan YE Feng ZHOU Weiming LIU Shanxi Key Laboratory of Phytochemistry College of Chemistry&Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China College of Chemistry and Molecular Science Wuhan UniversityWuhan 430072China

The depletion of petroleum resources and the intensification of environmental problems have necessitated the development of renewable products from bio-based chemicals instead of petroleum ***,a new kind of ester lubricating oil,isooctyl furan dicarboxylate(isooctyl-FD),was prepared from bio-based 2,5-furandicarboxylic *** structure of isooctyl-FD was evaluated using nuclear magnetic resonance imaging and high-resolution mass *** physicochemical and tribological properties including thermal and oxidation stabilities,flash point and pour point,viscosity and viscosity index,and friction-reducing and anti-wear properties were systematically *** results show that isooctyl-FD has comparable thermal and oxidation stability to the synthetic ester lubricating oil,isooctyl sebacate(isooctyl-S).Its friction-reducing and anti-wear properties are superior to isooctyl-S;however,its viscosity-temperature and low-temperature properties are inferior to isooctyl-S.

关键词： 2,5-furandicarboxylic acid synthetic ester bio-based platform compound lubricating oil

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