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Physicochemical properties of amide–AlCl_3 based ionic liquid analogues and their mixtures with copper salt

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Chinese Journal of Chemical Engineering 2019年第1期27卷 144-149页

作者： Pengcheng Hu Wei Jiang Lijuan Zhong shufeng zhou College of Chemical Engineering HuaQiao University

The physicochemical properties of three different amide–AlCl_3 based ionic liquid(IL) analogues and their mixtures with copper salt, such as conductivity, viscosity, density and isobutane solubility were determined over a wide range of *** effects of amide structure, amide/AlCl_3 molar ratio and CuCl modification on these physicochemical properties were *** showed that the conductivity of amide–AlCl_3 based IL analogues was much lower than that of traditional Et_3NHCl–AlCl_3 IL with same ligand/AlCl_3 molar ratio due to incomplete splitting of AlCl_3, whereas the density and viscosity of amide–AlCl_3 based IL analogues were slightly *** viscosity of amide–AlCl_3 based IL analogues was closely related to the amide structure,and followed the order of DMA–AlCl_3>AA–AlCl_3>NMA–AlCl_3 with same amide/AlCl_3 molar ***,the density of amide–AlCl_3 based IL analogues ranked in the following order: AA–AlCl_3>NMA–AlCl_3>DMA–AlCl_*** the amide/AlCl_3 molar ratio decreased the conductivity and density, while increased the *** solubility experiment indicated that the isobutane solubility in NMA–AlCl_3 was highest than that in two other IL *** the modification of CuCl, the conductivity, viscosity and density of these IL analogues increased, whereas the isobutane solubility *** results provide the foundation for the development of a suitable IL analogue catalyst for isobutane alkylation.

关键词： Ionic liquid analogues Conductivity Density Viscosity Isobutane solubility

Isomerization of n-pentane catalyzed by amide-AlCl3-based ionic liquid analogs with various additives

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Chinese Journal of Chemical Engineering 2020年第1期28卷 152-157页

作者： Pengcheng Hu Jingwei Zheng Wei Jiang Lijuan Zhong shufeng zhou College of Chemical Engineering Huaqiao UniversityXiamen 361021China

The isomerization of n-pentane to generate high-quality blending components for clean gasoline was catalyzed by several amide-AlCl3-based ionic liquid(IL) analogs with various amides as donor molecules. The catalytic performance of these IL analogs was evaluated in a magnetic agitated autoclave operated in batch *** analog based n-methylacetamide(NMA)-AlCl3 with the amide/AlCl3 molar ratio of 0.65 showed excellent performance toward n-pentane isomerization because 0.65 NMA-1.0 AlCl3 had a low viscosity and bidentate coordination structure. The influences of reaction time, reaction temperature, and stirring speed on the catalytic performance were also investigated. Optimal reaction conditions comprised the reaction time of 1 h, the reaction temperature of 40 °C, and the stirring speed of 1500 r·min-1. Under optimal condition, the n-C5 conversion,research octane number(RON) increment, total liquids yield, and isoparaffin yield in isomerized oil were56.80%, 13.51, 89.90 wt%, and 44.32 wt%, respectively. A new mathematical model was constructed to predict the relationships among RON increment, RON increment/n-C5 conversion ratio, and n-C5 conversion. The new model indicated that an appropriate conversion per pass of n-C5 did not exceed 50%–55%. Various cycloparaffin additives were used to improve the catalytic performance of 0.65 NMA-1.0 AlCl3. The n-C5 conversion increased from 56.80% to 67.32%. The RON increment, total liquids yield, and isoparaffin yield reached 17.83, 97.36 wt%,and 63.74 wt%, respectively.

关键词： Isomerization Ionic liquid analogs n-Pentane Mathematical model Additives

Supercapacitive properties of MnNiS_(x)@Ti_(3)C_(2)T_(x) MXene positive electrode assisted by functionalized ionic liquid

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Chinese Journal of Chemical Engineering 2023年第9期61卷 102-109页

作者： Pengcheng Hu Ruimin Chai Ping Wang Jinke Yang shufeng zhou College of Chemical Engineering Huaqiao UniversityXiamen 361021China

MnNiS_(x)@Ti_(3)C_(2)T_(x)as the positive electrode of supercapacitor was successfully prepared by hydrothermal method with the assistance of amino-functionalized ionic *** micromorphological structures of MnNiS_(x)@Ti_(3)C_(2)T_(x)were analyzed using X-ray diffraction,scanning electron microscope,X-ray photoelectron spectroscopy,transmission electron microscope,and energy dispersive spectrometer to reveal the synergistic effect between MnNiSxand Ti_(3)C_(2)T_(x)***——x grew into a three-dimensional coral-like structure on the surface and between layers of Ti_(3)C_(2)T_(x)*** structure alleviated the collapse and stacking of Ti_(3)C_(2)T_(x),increased the specific surface area of Ti_(3)C_(2)T_(x),and promoted the charges transfer on the surface of Ti_(3)C_(2)T_(x).The electrochemical performances of MnNiS_(x)@Ti_(3)C_(2)T_(x)positive electrode,such as cyclic voltammetry,galvanostatic charge/discharge,and electrochemical impedance spectroscopy,were *** synergistic effect between MnNiSxand Ti_(3)C_(2)T_(x)MXene improved the specific capacitance and the capacitance retention of the MnNiS_(x)@Ti_(3)C_(2)T_(x)*** asymmetric solid-state supercapacitor(ASC)assembled using MnNiS_(x)@Ti_(3)C_(2)T_(x)as cathode material had the power density of 816.34 W·kg^(-1),and the energy density of 35.11 Wh·kg^(-1).The capacitance retention of ASC reached 98% after 5000 cycles at a current density of 5 A·g^(-1).

关键词： Supercapacitor Transition metal sulfide MXene Structure characterization Electrochemical performance

Enhanced electrochemical performance of CoNiS_(x)@Ti_(3)C_(2)T_(x)electrode material through in-situ doping of cobalt element

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Frontiers of Chemical Science and Engineering 2023年第10期17卷 1440-1449页

作者： Pengcheng Hu Ruimin Chai Ping Wang Jinke Yang shufeng zhou College of Chemical Engineering Huaqiao UniversityXiamen 361021China

The composite electrode of CoNiS_(x)and Ti_(3)C_(2)T_(x)MXene was successfully prepared using a onestep hydrothermal method under the in-situ doping of the cobalt *** effects of in-situ doping of the cobalt element on the micromorphology and electrochemical performance of the electrodes were *** insitu doping of the cobalt element,NiS with a needle-like structure was converted into a CoNiS_(x)with petal-like *** petal-like CoNiS_(x)with a rough surface was very dense and evenly wrapped on the surface and interlamination of Ti_(3)C_(2)T_(x),which helped increase the specific surface area and pore volume of the *** the identical test conditions,CoNiS_(x)@Ti_(3)C_(2)T_(x)had a higher specific capacitance and capacitance retention than NiS@Ti_(3)C_(2)T_(x).This result indicated that the in-situ doping of the cobalt element promoted the electrochemical performance of the *** energy density of the CoNiS_(x)@Ti_(3)C_(2)T_(x)/nickel foam(NF)//activated carbon(AC)/NF asymmetric supercapacitor device was 59.20 Wh·kg^(–1)at a power density of 826.73 W·kg^(–1),which was much higher than that of NiS@Ti_(3)C_(2)T_(x)/NF//AC/*** CoNiS_(x)@Ti_(3)C_(2)T_(x)/NF//AC/NF in series were able to illuminate the light emitting diode lamp for about 10 min,which was higher than the 5 min of three NiS@Ti_(3)C_(2)T_(x)/NF//AC/NF in series under the same *** CoNiS_(x)@Ti_(3)C_(2)T_(x)/NF//AC/NF with high energy density had better application potential in energy storage than the NiS@Ti_(3)C_(2)T_(x)/NF//AC/NF.

关键词： MXene supercapacitor cobalt doping structure characterization electrochemical performance

Analysis of long term catalytic performance for isobutane alkylation catalyzed by NMA–AlCl3 based ionic liquid analog

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Chinese Journal of Chemical Engineering 2019年第8期27卷 1857-1862页

作者： Pengcheng Hu Zhitao Wu Junlin Wang Yuqing Huang Yang Deng shufeng zhou College of Chemical Engineering Huaqiao University

Isobutane alkylation with 2-butene to produce high-quality gasoline was catalyzed by Nmethylacetamide(NMA)-AlCl3 based ionic liquid(IL) analog with a NMA/AlCl3 molar ratio of 0.75 and CuCl modification,which was marked as CuCl-modified 0.75 NMA-1.0 *** long-term experiment was carried out in the autoclave operated in continuous mode to investigate the distribution of alkylate under different experimental *** result indicated that the long-term alkylation was divided into three stages:rising,stable,and descending regions.C8 selectivity and molar ratio of trimethylpentanes(TMPs) to dimethylhexanes(DMHs) reached the highest level in the stable region,and research octane number(RON) of alkylate was as high as *** Al species([AlbCl7]^-,[A1 CuC15]^-) and cationic Al species([AlCl2 L]^+) from IL analog as two active Lewis acidic species played a catalytic role in the long-term alkylation,whereas the neutral Al species did not participate into the ***,the structure of CuCl-modified 0.75 NMA-1.0 AlCl3 was destroyed after the deactivation,and CuCl was enriched in the CD2 Cl2-insoluble substance,resulting in a decreasing TMP/DMH *** catalytic lifetime of IL analog was similar with CuCl-modified 0.55 Et3 NHCl-1.0 AlCl3 IL,but IL analog had a lower cost.

关键词： Ionic liquid analog Isobutane alkylation Long-term experiment Structural analysis

Estimating Brain Functional Networks Based on Spatiotemporal Higher-Order Correlations for Autism Identification

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Journal of Computer and Communications 2023年第8期11卷 149-164页

作者： Mengxue Pang Limei Zhang Xueyan Liu Tinglin Zhang shufeng zhou School of Mathematics Science Liaocheng University Liaocheng China School of Computer Science and Technology Shandong Jianzhu University Jinan China School of Information Engineering Yancheng Institute of Technology Yancheng China

Brain functional network (BFN) has become an important tool for the analysis and diagnosis of brain diseases, and how to build a high-quality BFN based on resting-state functional magnetic resonance imaging (rs-fMRI) has become a growing concern in the neuroscience community. Although some methods have been proposed to construct a high-quality BFN, they only encode the spatial characteristics of the ROIs, ignoring the temporal characteristics. As a result, it becomes challenging to accurately capture the true state of the brain. To address this problem, we propose a novel method to construct a higher-order BFN, considering both temporal and spatial domain characteristics. In particular, we get the characteristics of the temporal domain by differentiating the rs-fMRI signal itself, and then we integrate the information of the spatial domain and temporal domain to build a high-order BFN. To evaluate the proposed method, we conduct our experiments on ABIDE database to identify subjects with Autism Spectrum Disorder (ASD) from normal controls. Experimental results show that our method can achieve higher performance than baseline methods.

关键词： Functional MRI HOFN Difference Autism Spectrum Disorder

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基于Java的多层分布式应用模型研究

微计算机信息 2006年第5X期22卷 260-262,39页

作者：周书锋聊城大学数学科学学院

分析了JDBC和RMI技术的基础上,详细介绍了基于Java的多层分布式应用系统体系结构及其实现技术,并给出了一个基于Java技术的多层分布式应用系统解决方案。

关键词：多层结构 Java JDBC Java RMI

Mechanism of Kinect-based virtual reality training for motor functional recovery of upper limbs after subacute stroke

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Neural Regeneration Research 2013年第31期8卷 2904-2913页

作者： Xiao Bao Yurong Mao Qiang Lin Yunhai Qiu Shaozhen Chen Le Li Ryan S.Cates shufeng zhou Dongfeng Huang Department of Rehabilitation Medicine the First Affiliated Hospital Sun Yat-sen University Key Laboratory of Health Informatics of Chinese Academy of Sciences Shenzhen Institutes of Advanced Technology Department of Pharmaceutical Sciences College of Pharmacy University of South Florida

The Kinect-based virtual reality system for the Xbox 360 enables users to control and interact with the game console without the need to touch a game controller, and provides rehabilitation training for stroke patients with lower limb dysfunctions. However, the underlying mechanism remains un- clear. In this study, 18 healthy subjects and five patients after subacute stroke were included. The five patients were scanned using functional MRI prior to training, 3 weeks after training and at a 12-week follow-up, and then compared with healthy subjects. The FugI-Meyer Assessment and Wolf Motor Function Test scores of the hemiplegic upper limbs of stroke patients were significantly increased 3 weeks after training and at the 12-week follow-up. Functional MRI results showed that contralateral primary sensorimotor cortex was activated after Kinect-based virtual reality training in the stroke patients compared with the healthy subjects. Contralateral primary sensorimotor cortex, the bilateral supplementary motor area and the ipsilateral cerebellum were also activated during hand-clenching in all 18 healthy subjects. Our findings indicate that Kinect-based virtual reality training could promote the recovery of upper limb motor function in subacute stroke patients, and brain reorganization by Kinect-based virtual reality training may be linked to the contralateral sen- sorimotor cortex.

关键词： neural regeneration neurological rehabilitation rehabilitation training neural plasticity virtual reality functional MRI stroke Kinect-based virtual reality training upper limb cerebral cortex brain activation region of interest grants-supported paper neuroregeneration

发达国家低碳经济中政府角色定位及对我国的启示

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改革与战略 2015年第8期31卷 196-198页

作者：周淑芬石家庄邮电职业技术学院河北石家庄050021

随着低碳经济理念越来越受到全球各国的认可,各国都在积极发展自身的低碳经济,发达国家政府在提高民众环保意识、发展低碳经济中做得较为出色。文章以美国、欧盟、日本等发达国家和地区作为案例,分析总结了各发达国家政府为发展低碳经... 详细信息

随着低碳经济理念越来越受到全球各国的认可,各国都在积极发展自身的低碳经济,发达国家政府在提高民众环保意识、发展低碳经济中做得较为出色。文章以美国、欧盟、日本等发达国家和地区作为案例,分析总结了各发达国家政府为发展低碳经济所做出的努力以及角色定位的特征。作为发展中国家,中国应借鉴发达国家发展低碳经济的经验,结合自身国情将低碳经济的发展上升为国家战略,通过完善各类发展低碳经济法律和措施来促进低碳经济的发展。

关键词：发达国家低碳经济政府角色定位启示

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