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Chinese Journal of Chemistry 2013年第3期31卷 377-380页

作者： Yunxu Yang Huimin Xue Laicheng Chen Ruilong Sheng Xuqin Li Kun Li Department of Chemistry and chemical engineering University of Science and Technology of Beij'ing Beijing 100083 China Petrochemical Department Puyang Vocational Technology College Puyang Henan 457000 China Shanghai institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

A simple 8-quinolinecarboxaldehyde derived antipyrine Schiff base （QA） was synthesized and characterized, which exhibited high selectivity to Cr^3＋ over other metal cations. The Cr^3＋ recognition of QA could be achieved by means of fluorescense and absorption spectra, moreover, the obvious color change from colorless to yellowish is easily observed by naked-eyes. The binding constant of QA to Cr^3＋ was evaluated by spectral titration and the binding model was in 1 ： 1 stoichiometry measured by Job＇s plot.

关键词： fluorescent chemosensor 8-quinolinecarboxaldehyde Schiffbase Cr^3+ detection

One pot synthesis, crystal structures and properties of two new MOFs with imidazole-containing tripodal ligand

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Science China Chemistry 2014年第11期57卷 1514-1519页

作者： TANG YunZhi YU YinMei XIONG JianBo YAO Qiong TAN YuHui GAO JiXing WEN HeRui School of Metallurgy and chemical engineering Institute of Engineering Jiangxi University of Science and Technology No. 1 Middle School of Zhangjiajie city

Two new different Cu(Ⅱ) MOFs with the same 1,3,5-tris(1-imidazolyl) benzene(tib) ligand {[Cu(tib)2]·(H2O)2·Br2}n(1) and {[Cu2(tib)·Br·Cl]·2Br}n(2) were obtained by one pot synthesized of tib with CuBr in the presences of HCl and water. X-ray single crystal diffraction analyses indicate that both complexes 1 and 2 have two dimensional frameworks containing different building blocks. Each Cu(Ⅱ) atom in complex 1 is coordinated by four N atoms from different tib ligands. However, there are two different cryptographic Cu(Ⅱ) atoms in complex 2, one is four coordinated by two bromine atoms and two N atoms from different tib ligands, the other is six coordinated by two chloride atoms and four N atoms from different tib ligands. The thermal gravimetric analysis of complexes 1 and 2 are depicted in the paper.

关键词： crystal structure one pot synthesis tripodal ligands Cu(Ⅱ) complex

Effect of microstructure on short pulse duration shock initiation of TATB and initial response mechanism

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Defence Technology（防务技术） 2020年第2期16卷 374-380页

作者： Jun Wang Wei Cao Xiang-li Guo Bi-bo Cheng Lu-lu Zhao Rui-rui Liu Xiao-wei Chen School of Mechatronical engineering Beijing Institute of TechnologyBeijing100081China institute of chemical Materials China Academy of Engineering PhysicsNo.64Mianshan RoadMianyang CityChina

Micro-TATB particles with different sizes and 3D nanoporous TATB architectures with different specific surface areas were prepared through recrystallization to study short pulse duration shock initiation properties by electric gun *** micro-TATB,the initiation threshold significantly decreases with TATB average size ranging from 79.7μm to 0.5μ*** 3D nanoporous TATB architecture,the initiation threshold decreases and then increases with specific surface areas increased from 9.6 m^2/g to36.2 m^2/*** lowest initiation thresholds are obtained for the micro-TATB with average sizes of 1.3μm and 0.5μm,and 3D nanoporous TATB architecture with specific surface area of 22.4 m^2/*** shock initiation thresholds of micro-TATB and 3D nanoporous TATB architectures show significantly decreases with the porosity *** decomposition reaction and thermal conductivity properties were further investigated to understand the initial response *** porosity provides more collapse sites to generate high temperature for formation of hot *** low thermal conductivity and decomposition temperature could enhance the formation and ignition of the hot spots,and initial decomposition reaction of *** effect of the decomposition temperature is higher than that of the thermal conductivity on the shock initiation *** enhanced decomposition reaction could pro mote energy release and transfer process from the ignition to the combustio *** work offe rs a new insight to understand the effects of microstructure on the shock initiation properties and the initial response mechanism of TATB.

关键词： Short pulse duration shock initiation Microstructure TATB architecture chemical reaction Initial response mechanism

FLOW OF A TRAIN OF DEFORMABLE FLUID PARTICLES IN A TUBE

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Applied Mathematics and Mechanics(English Edition) 1998年第7期19卷 651-661页

作者：陈晋南 School of chemical engineering & Material Science Peking Institute of Technology Beijing P. R. China Department of chemical engineering City College of New York USA

In the article, the boundary integral technique is used to salve the hydrodynamic movement. of a train of deformable fluid particles in a tube. When a fluid particle is: in a tube, the total normal stress difference is not constant any more; this force tends to distend and elongate the particle. We find that the difference between the velocity of a deformable fluid particle and a sphere (with the same radius) increases as the distance between the particles decreases, and that the increase in velocity with L'/a' is greater the capillary number, and this increase becomes less pronounced as radius' decreases.

关键词： two phase flow deformable periodic fluid particle

Synthesis,Structure and Photoelectric Property of a 3D Supramolecular Zinc Coordination Polymer

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Chinese Journal of Structural Chemistry 2018年第3期37卷 421-426页

作者：罗亚楠刘芷晨姜慧莹于丽颖于晓洋 College of chemical and Pharmaceutical engineering Jilin Institute of Chemical Technology

Using a rigid azo ligand 4-[（8-hydroxy-5-quinolinyl）azo]-benzoic acid（H2 L）,a new supramolecular compound [Zn（L）（H2O）2]n（1） has been solvothermally synthesized and structurally characterized by X-ray single-crystal diffraction,infrared spectrum,elemental analysis,power X-ray diffraction and thermal *** 1 crystallizes in monoclinic,space group C2/c with a = 30.372（8）,b = 11.415（3）,c = 9.248（3） A,β = 106.94（3）o,V = 3067.20（15）A3,C（16）H（13）N3O5Zn,Mr = 392.66,Z = 8,Dc = 1.701 Mg/m^3; F（000） = 1600,μ = 1.636 mm^-1,reflections collected：7290,reflections unique：2735,R（int）= 0.0282,R = 0.0351,wR（all data） = 0.0919,GOOF on F^2 = *** 1 exhibits a one-dimensional（1 D） zig-zag chain structure connected into a three-dimensional（3D） supramolecular network through hydrogen bonding *** property and electrochemical property were detected on compound 1.

关键词： coordination polymer co-sensitization solar cell fluorescent property electrochemical property

Biosynthesis of 4-hydroxyphenylpyruvic acid from L-tyrosine using recombinant Escherichia coli cells expressing membrane bound L-amino acid deaminase

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Chinese Journal of chemical engineering 2018年第2期26卷 380-385页

作者： Huanru Ding Weirui Zhao Changjiang Lu Jun Huang Sheng Hu Shanjing Yao Lehe Mei Jinbo Wang Jiaqi Mei School of Biotechnology and chemical engineering Ningbo Institute of TechnologyZhejiang UniversityNingbo 315100China Department of chemical and Biolagical engineering Zhejiang UniversityHangzhou 310027China School of Biological and chemical engineering Zhejiang University of Science and TechnologyHarlgzhou 310023China Department of chemical engineering The University of utahSalt Lake City 84102America

4-Hydroxyphenylpyruvic acid （4-HPPA）, a kind of α-keto acid, is an intermediate in the metabolism of tyrosine and has a wide range of application in food, pharmaceutical and chemical industry. Using amino acids as raw material to prod uce the corresponding α-keto acid is thought to be both economic and efficient. Among the enzymes that convert amino acid to α-keto acid, membrane bound L-amino acid deaminase （mL-AAD）, which is anchored to the outer side of the cytomembrane, becomes an ideal enzyme to prepare α-keto acid since there is no cofactors needed and H2O2 production during the reaction. In this study, the mL-AAD from Proteus vulgaris was used to prepare whole-cell catalysts to produce 4-HPPA from L-tyrosine. The secretory efficiency of mL-AAD conducted by its own twin-arginine signal peptide （twin-arginine translocation pathway, Tat） and integrated pelB （the general secretory pathway, Sec）-Tat signal peptide was determined and compared firstly, using two pET systems （pET28a and pET20b）. It was found that the Tat pathway （pET28a-mlaad） resulted in higher cell-associated mL-AAD activity and cell biomass, and was more beneficial to prepare biocatalyst. In addition, expression hosts BI21 （DE3） and 0.05 mmol. L- 1 IPTG were found to be suitable for mL-AAD expression. The reaction conditions for mL-AAD were optimized and 72.72 mmol,L 1 4-HPPA was obtained from 100 mmol.L 1 tyrosine in 10 h under the optimized conditions. This bioprocess, which is more eco-friendly and economical than the traditional chemical synthesis ways, has great potential for industrial application.

关键词： 4-Hydroxyphenylpyruvic acidc-tyrosine Membrane-bound L-amino acid deaminases Biocatalysis Molecular biology Biological engineering

Soil NOx Emission Prediction via Recurrent Neural Networks

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Computers, Materials & Continua 2023年第10期77卷 285-297页

作者： Zhaoan Wang Shaoping Xiao Cheryl Reuben Qiyu Wang Jun Wang Department of Mechanical engineering Iowa Technology InstituteUniversity of IowaIowa CityIA 52242USA Department of chemical and Biochemical engineering Iowa Technology InstituteUniversity of IowaIowa CityIA 52242USA

This paper presents designing sequence-to-sequence recurrent neural network(RNN)architectures for a novel study to predict soil NOx emissions,driven by the imperative of understanding and mitigating environmental *** study utilizes data collected by the Environmental Protection Agency(EPA)to develop two distinct RNN predictive models:one built upon the long-short term memory(LSTM)and the other utilizing the gated recurrent unit(GRU).These models are fed with a combination of historical and anticipated air temperature,air moisture,and NOx emissions as inputs to forecast future NOx *** LSTM and GRU models can capture the intricate pulse patterns inherent in soil NOx ***,the GRU model emerges as the superior performer,surpassing the LSTM model in predictive accuracy while demonstrating efficiency by necessitating less training ***,the investigation into varying input features reveals that relying solely on past NOx emissions as input yields satisfactory performance,highlighting the dominant influence of this *** study also delves into the impact of altering input series lengths and training data sizes,yielding insights into optimal configurations for enhanced model ***,the findings promise to advance our grasp of soil NOx emission dynamics,with implications for environmental management *** ahead,the anticipated availability of additional measurements is poised to bolster machine-learning model ***,the future study will explore physical-based RNNs,a promising avenue for deeper insights into soil NOx emission prediction.

关键词： Soil NOx emission long-short term memory gated recurrent unit sequence-to-sequence

Fluoride ions adsorption from water by CaCO_(3)enhanced Mn-Fe mixed metal oxides

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Frontiers of chemical Science and engineering 2023年第2期17卷 236-248页

作者： Xinyuan Wang Heriberto Pfeiffer Jiangjiang Wei Jinyu Wang Jinli Zhang School of Chemistry and chemical engineering/Key Laboratory for Green Processing of chemical engineering of Xinjiang Bingtuan Shihezi UniversityShihezi 832003China institute of Materials National Autonomous University of MexicoMexico City 04510Mexico School of chemical engineering and Technology Tianjin UniversityTianjin 300350China

Novel CaCO_(3)-enhanced Mn-Fe mixed metal oxides(CMFC)were successfully prepared for the first time by a simple-green hydrothermal strategy without any surfactant or template combined with calcination *** oxides were then employed as an adsorbent for adsorptive removal of excess fluoride *** adsorbent was characterized by SEM,XPS,XRD,FTIR,and BET analysis *** adsorption property of CMFC toward fluoride ion was analyzed by batch *** fact,CMFC exhibited adsorption capacity of 227.3 mg∙g^(-1)toward fluoride *** showed that ion exchange,electrostatic attraction and chemical adsorption were the main mechanism for the adhesion of large amount of fluoride ion on the CMFC surface,and the high adsorption capacity responded to the low pH of the adsorption *** the fluoride ion concentration was increased from 20 to 200 mg∙L^(-1),Langmuir model was more in line with experimental *** change of fluoride ion adsorption with respect to time was accurately described by pseudosecond-order *** five cycles of use,the adsorbent still maintains a performance of 70.6%of efficiency,compared to the fresh ***,this material may act as a potential candidate for adsorbent with broad range of application prospects.

关键词： mesoporous materials metal oxides fluoride ion adsorption mechanism

Catalytic performance of nano-hybrid graphene and titanium dioxide modified cathodes fabricated with facile and green technique in microbial fuel cell

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Progress in Natural Science:Materials International 2017年第6期27卷 647-651页

作者： M.Mashkour M.Rahimnejad S.M.Pourali H.Ezoji Ahmed ElMekawy Deepak Pant Biofuel and Renewable Energy Research Center Department of Chemical Engineering Babol Noshirvani University of Technology Genetic engineering and Biotechnology Research institute University of Sadat City (USC) School of chemical engineering The University of Adelaide Separation and Conversion Technologies Flemish Institute for Technological Research (VITO)

Finite resources of the world’s fossil fuel give rise to the irresistible urge to explore alternative renewable energy routes such as microbial fuel cells（MFCs）. The limited productivity is one of the main obstacles for MFC scalability. In this study, a dual-chamber MFC was assembled and equipped with fabricated modified cathodes with titanium dioxide（TiO;） or hybrid graphene（HG） which mainly improved the catalytic activity of the *** graphite paste（GP） bare electrode was modified by both nanomaterials using a green and facile *** results showed that the modified cathodes resulted in a considerable improvement for the MFC performance,i.e., the power density reaching levels of 80 mW/m;for GP-TiO;and 220 mW/m;for GP-HG compared to 30 mW/m;for GP electrode. Additionally, the modified electrodes exhibited lower charge transfer resistance(R;) compared to the bare electrode. Therefore, these modified electrodes, fabricated by an eco-friendly method,could be used as alternatives to the precious expensive metals like Pt.

关键词： Microbial fuel cell Cathode Graphite paste Titanium dioxide Graphene oxide Power density