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Highly efficient synthesis of boron nitride nanotubes by catalytic chemical vapor deposition of boron/nickel containing precursors

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Journal of Materiomics 2022年第6期8卷 1199-1204页

作者： Heng Wang Haoran Yang Yongzhi Peng Yulin Zheng Dongying Huang Pu Hu Yawei Li Zhengyi Fu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Key Laboratory of Green Chemical Engineering Process of Ministry of EducationWuhan Institute of TechnologyWuhan430205China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081China

High-purity and high-yield boron nitride nanotubes with large aspect ratio were prepared by a facile two-step process,including the synthesis of boron/nickel containing precursors by precipitation reactions and subsequent thermally catalytic chemical vapor deposition *** influence of catalyst content and annealing temperature on the phase composition and microstructure of the products were *** results show that it is difficult to exert the catalytic effect of nickel-based catalyst at low temperatures(<1400℃).At appropriate temperatures(1400-1500℃),highly crystalline boron nitride nanotubes with a length of more than 50 mm and a diameter of 50 nm are *** content of catalyst in the precursor mainly affects the morphology of the boron nitride *** the content is too low,it is easy to form boron nitride particles;while high catalyst content can easily lead to catalyst aggregation and form a submicron one-dimensional boron nitride with unregular *** on microstructural evolutions,phase changes,and thermodynamic analysis,the vapor-liquid-solid(V-L-S)growth mechanism of the tip growth mode dominates the formation of boron nitride nanotubes has also been verified.

关键词： Boron nitride nanotubes Highly efficient synthesis Boron/nickel containing precursors Growth mechanism

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Efficient continuous synthesis of 2-[3-(trifluoromethyl)phenyl]malonic acid,a key intermediate of Triflumezopyrim,coupling with esterification-condensation-hydrolysis

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Chinese Chemical Letters 2025年第1期36卷 234-238页

作者： Yuexiang Liu Xiangqiao Yang Tong Lin Guantian Yang Xiaoyong Xu Bubing Zeng Zhong Li Weiping Zhu Xuhong Qian Shanghai Key Laboratory of Chemical Biology School of PharmacyEast China University of Science and TechnologyShanghai 200237China Shanghai Frontiers Science Center of Optogenetic Techniques for Cexll Metabolism School of PharmacyEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai 200237China Engineering Research Center of Pharmaceutical Process Chemistry Ministry of EducationSchool of PharmacyEast China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of ChemistrySchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200241China

Triflumezopyrim(TFM)is a novel mesoionic pyrido[1,2-α]pyrimidinones insecticide,which acts on nicotinic acetylcholine receptors(n ACh Rs)and has no cross-resistance with other ***,we firstly developed a new continuous flow approach to synthesis 2-[3-(trifluoromethyl)phenyl]malonic acid,a key intermate of TFM,coupling with esterification,condensation,and *** three-step reactions were optimized and transformed into a continuous synthesis mode by three micro reaction *** with the batch mode,the total reaction time and overall separation yield were improved from more than 12 h and 60%to 18 min and 73.38%,*** solvent consumption and waste emission were significantly reduced,which also provides an eco-friendly and efficient potential tool for the development and production of mesoionic pyrido[1,2-α]pyrimidinones insecticide.

关键词： Triflumezopyrim(TFM) 2-[3-(Trifluoromethyl)phenyl]malonic acid Continuous flow synthesis Micro-reactor

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An Integrated process Coupling Biooxidation and Fenton Oxidation for Treatment of Arsenic-Containing Acid Mine Drainage

SSRN

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SSRN 2024年

作者： Shen, Cailong Chen, Yanzhen Yang, Li Zhang, Guangji Yang, Chao State Key Laboratory of Biochemical Engineering CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China

Arsenic-containing acid mine drainage (AMD) is a serious water pollution problem worldwide. In present study, an integrated process coupling biooxidation and Fenton oxidation was proposed for treatment of simulated AMD with high As(III) concentration. The biooxidation experiments showed that Acidithiobacillus ferrooxidans was resistant to at least additional H2O2 of 90 mM when cultured in 100 mL Leathen medium with 5 g FeSO4·7H2O. The XRD and SEM confirmed the formation of crystalline jarosite and amorphous schwertmannite. The AMD treatment was carried out with 300 mg/L As(III) in shaking flasks, and finally 73.15% arsenic was removed in 96 h. The formed precipitates exhibited 2.117 mg/L arsenic in leachate in the toxicity characteristic leaching procedure (TCLP) test, which was below the United states Environmental Protection Agency’s limit of 5 mg/L. However, the precipitates formed in the treatment experiments without additional H2O2 exhibited leached arsenic of 6.492 mg/L in the TCLP test. The results suggested a better stability of the formed precipitates in the integrated arsenic removal process. The XPS suggested that the improved stability was attributed to that the formed precipitates mainly contained As(V) instead of As(III). Meanwhile, the ICP-OES and ASV showed a rapid As(III) oxidation in the solution immediately after the addition of H2O2. The arsenic removal process was carried out in a 5 L stirred tank reactor to evaluate the feasibility on a larger scale. The results confirmed that biooxidation was not inhibited by additional H2O2 from the point of view of the metabolic activity of bacteria. About 85% arsenic settled down in 120 h, and the formed precipitates exhibited a good stability of 0.534 mg/L arsenic leaching concentration in the TCLP test, indicating the potential of the arsenic removal process for further application. © 2024, The Authors. All rights reserved.

关键词： Iron compounds

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Ionic liquid catalyzed solvent-free synthesis of chalcone and its derivatives under mild conditions

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Chinese Journal of Chemical engineering 2021年第5期34卷 160-166页

作者： Qiu Zhao Gang Wang Fuxia Liao Yifan Sha Fei Xu Chunshan Li Zengxi Li Yijun Cao School of Chemical Engineering and Energy Zhengzhou UniversityZhengzhou 450001China Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

An ionic liquid(IL)catalyzed solvent-free process was developed for the direct synthesis of chalcone and its derivatives by using substituted acetophenones and benzaldehydes via aldol reaction under mild conditions.A series of acidic and basic ILs were selected and *** influences of cations and reaction conditions on product yield and selectivity were systematically ***[Bmim]OH was identified as the optimal IL,with the highest yield and selectivity reaching up to 96.7% and 100%,respectively.A reaction mechanism-based kinetic model was established and regressed with experimental data,revealing the β-Hydroxylketone dehydrolysis with activation barrier of 37.8 kJ·mol^(-1) was observed as the ratecontrolling step.

关键词： Ionic liquid Chalcone Aldol reaction Kinetic model

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Insight into leaching of rare earth and aluminum from ion adsorption type rare earth ore:Adsorption and desorption

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Journal of Rare Earths 2023年第9期41卷 1398-1407,I0005页

作者： Qiang He Jinfa Chen Limei Gan Menglan Gao Miaomiao Zan Yanfei Xiao Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China Ganzhou Engineering Technology Research Center of Green Metallurgy and Process Intensification Ganzhou 341000China Key Laboratory of Ionic Rare Earth Resources and Environment Ministry of Natural ResourcesGanzhou 341oooChina Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation Ganzhou 34100oChina

Clay minerals are inferred to be the primary host materials for ion-exchangeable rare earth in ion adsorption type rare earth ore(IAREO).During the rare earth leaching process,the adsorption and desorption reactions of the cations controlling the leaching process continue to occur at the clay minerals-leaching agent solution *** order to understand the leaching mechanism and behavior of rare earth and co-leached aluminum,adsorption,competitive adsorption,and desorption experiments were carried out using kaolin as a typical clay *** powerful electrostatic attraction and concentration driving forces facilitate the adsorption of *** adsorption ability and competitive adsorption ability of cations depend on their charge,hydration radius,and hydrolysis properties,and decrease in the order of La^(3+),Y^(3+),Al^(3+),Mg^(2+),and NH_(4)^(+).The desorption of rare earth and aluminum is positively affected by the concentration-driving force exerted by high concentrations of Mg^(2+) and NH_(4)^(+),with the order of the desorption ability being opposite to the adsorption ***,unspecified interactions between clay mineral particles enhanced by high-concentration desorbents,especially by Mg^(2+) than NH_(4)^(+),will adversely affect desorption reactions,which result in lower desorption efficiencies of rare earth and aluminum obtained with magnesium sulfate compared to those obtained with ammonium sulfate at high ***-phase Al(OH)_(3) generated at a high peak aluminum concentration leads to a considerably delayed aluminum efflux,thereby partially separating the rare earth from aluminum during the actual column leaching *** advance the mining technology of IAREO by selectively improving the rare earth leaching efficiency with minimal leaching agent consumption,higher charged cations with concentrations limited to suitable levels should be preferred as leaching agents.

关键词： Rare earths Aluminum Kaolin Adsorption Desorption

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BaTiO_(3)/Polyurethane Dielectric Composites with Diels-Alder Bond for Improved Self-Healing Properties

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Journal of Renewable Materials 2022年第9期10卷 2355-2364页

作者： unlong Yao Wei Nie Zhengguang Sun Huan Yang Yu Guan Lin Gao Xueliang Jiang Mujie Guo Chuanxi Xiong Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan430205China Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan430062China Key Laboratory of Green Chemical Engineering Process of Ministry of Education Wuhan Institute of TechnologyWuhan430205China School of Chemistry and Environmental Engineering Jianghan UniversityWuhan430056China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China

In general,self-healing dielectric composites are mainly composed of polar hydrogen bonds,which have high hydrophilicity and are unsuitable for humid *** composite with Diels-Alder(D-A)bond contains covalent bonds,it can be adopted as an efficient self-healing ***,we construct self-healing barium titanate(BT)/polyurethane(PU)dielectric composites by adopting PU with D-A bond as matrix(BT/PU-DA).The prepared 10%BT/PU-DA composite exhibits superior self-healing ability than that of ***,its dielectric constant can reach 9.3 with a loss of only 0.04 at 1000 Hz and maintain 93%repair efficiency of tensile *** experimental analysis suggests the introduction of D-A bond can enhance the thermostability and self-healing ability of BT/PU-DA *** addition,the incorporation of BT nanoparticles and D-A bond in the self-healing composite contributes to the lower dielectric loss and excellent tensile strength after *** adopted strategy is a promising and facile approach to develop highly efficient selfhealing dielectric material,which will be conducive to reuse and sustainable development of the electronic packaging material in aqueous medium or wet environment.

关键词： Diels-Alder bond self-healing dielectric properties tensile strength polyurethane

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Brief review of hydrocarbon-reforming catalysts map for hydrogen production

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Energy Reviews 2023年第3期2卷 51-62页

作者： Qunwei Guo Jiaqi Geng Jiawen Pan Lu Zou Yunfeng Tian Bo Chi Jian Pu School of Materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science&TechnologyWuhanHubei430074PR China Key Laboratory of Green Chemical Engineering Process of Ministry of Education School of Chemical Engineering and PharmacyWuhan Institute of TechnologyWuhanHubei430073PR China Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization School of Materials Science and PhysicsChina University of Mining and TechnologyXuzhou221116PR China

Hydrogen energy,the cleanest fuel,presents extensive applications in renewable energy technologies such as fuel ***,the transition process from carbon-based(fossil fuel)energy to desired hydrogen energy is usually hindered by inevitable scientific,technological,and economic obstacles,which mainly involves complex hydrocarbon reforming ***,this paper provides a systematic and comprehensive analysis focusing on the hydrocarbon reforming ***,recent related studies are summarized to clarify the intrinsic difference among the reforming *** to objectively assess the activated catalyst and deactivation mechanism,the rate-determining steps of reforming process have been emphasized,summarized,and ***,the effect of metals and supports on individual reaction processes is discussed followed by the metalsupport *** tendency and research map could be established to promote the technology development and expansion of hydrocarbon reforming *** review could be considered as the guideline for academics and industry designing appropriate catalysts.

关键词： Hydrogen production Reforming mechanism Metal-support interaction Metal catalysts Supports properties

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Aggregating particles on the O/W interface:Tuning Pickering emulsion for the enhanced drug delivery systems

Aggregate

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Aggregate 2022年第2期3卷 3-21页

作者： Yali Ming Yufei Xia Guanghui Ma State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

The rational design of drug delivery systems has led to enhanced targeting,increased efficiency,and a reduction of side effects in chemotherapies and *** most biological reactions took place at the interface,particle-stabilized emulsion(Pickering emulsion),may offer major implications for the advanced drug loading,delivery,and controlled *** fact,it is the aggregating particles that determined the multi-level structure,multi-valent cellular interactions,and the multi-functional physiochemical properties in drug delivery.A deeper understanding on the tunable aggregating patterns and properties,as well as the underlying mechanisms,may pave the way for the efficient drug delivery,and also aided the progressing of“Aggregology”beyond molecules to particles,emulsions,and the biomedical ***,the recent development of Pickering emulsions and their applications in drug delivery were thoroughly *** to control over the physiochemical properties were illustrated based on particle properties,energy input,and the choices of continuous and dispersion *** particular,enough emphasis was attached on the structure-effect relationship between the tunable physiochemical properties and the delivery process,such as the multi-level structure for effective loading,flexibility and permeability for enhanced delivery,and the stimuli-responsiveness for the controlled *** channeling the unique interfacial properties and the enhanced drug delivery efficiency,this work may shed light on the rational design of Pickering emulsions for the efficient drug delivery.

关键词： drug delivery system multi-valent interactions particle aggregation Pickering emulsion softness

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Pickering emulsions stabilized by biocompatible particles:A review of preparation,bioapplication,and perspective

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Particuology 2022年第5期20卷 110-120页

作者： Tong Zhang Fuguo Liu Jie Wu To Ngai Department of Chemistry the Chinese University of Hong KongShatinN.T.Hong KongChina College of Food Science and Engineering Northwest A&F UniversityYangling 712100China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 700790China

The phenomenon of adsorption of solid particles at fluid interfaces to stabilize emulsions or foams have been known for more than a ***,particle-stabilized emulsions,often referred to as Pickering emulsions,are receiving growing attention as they are encountered in oil recovery and have long been used in personal care products and food *** the past 10 years the focus of the Pickering emulsion has also increasingly shifted to biomedical applications with thanks to novel syntheses of a wide range of biocompatible particle ***,a brief overview of the development of biocompatible particles is given for Pickering emulsion stabilization,including alginate,poly(lactic-co-gIycolic acid)(PLGA),and protein-based *** materials prepared by templating from emulsion stabilized with biocompatible particles include colloidal capsules and hierarchically porous *** is hoped that the understanding gained from the recent intense activity in the field will enable more researchers to modify existing materials and design new formulations,which would be beneficial for exploring more biological applications.

关键词： Biocompatible particle Pickering emulsion High internal phase emulsion(HIPE) Porous structure

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A carbon material doped with both porous FeO_(x) and N as an efficient catalyst for oxygen reduction reactions

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新型炭材料（中英文） 2024年第6期39卷 1202-1212页

作者： GAO Jian WANG Xin-yao MENG Ling-xin YIN Zhen MA Na TAN Xiao-yao ZHANG Peng State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Engineering Process EngineeringDepartment of Chemical EngineeringTiangong UniversityTianjin 300387China Haian Nanjing University High Tech Institute Haian 226600China College of Chemical Engineering and Materials Science Tianjin University of Science and TechnologyTianjin 300457China School of Environmental Science and Engineering Tiangong UniversityTianjin 300387China

To replace precious metal oxygen reduction reaction(ORR)electrocatalysts,many transition metals and N-doped car-bon composites have been proposed in the last decade resulting in their rapid development as promising non-precious metal *** used Ketjenblack carbon as the precursor and mixed it with a polymeric ionic liquid(PIL)of[Hvim]NO_(3) and Fe(NO_(3))_(3),which was thermally calcined at 900℃ to produce a porous FeO_(x),N co-doped carbon material denoted FeO_(x)-N/*** the PIL of[Hvim]NO_(3) strongly combines with and disperses Fe^(3+)ions,and NO_(3)−is thermally pyrolyzed to form the porous structure,the FeO_(x)-N/C catalyst has a high electrocatalytic activity for the ORR in both 0.1 mol L^(−1) KOH and 0.5 mol L^(−1) H_(2)SO_(4) *** was used as the catalyst to assemble a zinc-air battery,which had a peak power density of 185 mW·cm^(−2).Its superior electrocatalytic activity,wide pH range,and easy preparation make FeO_(x)-N/C a promising electrocatalyst for fuel cells and metal-air batteries.

关键词： Oxygen reduction reaction Ionic liquid Porous carbon Electrocatalysis FeOx N co-doping

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