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Chinese Journal of Chemical Engineering 2022年第12期52卷 172-183页

作者： zhenyu wu Zengxi Li Chunshan Li School of Chemical Science University of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and EngineeringKey Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Zhongke Langfang Institute of Process EngineeringChinese Academic of SciencesHebei 065000China

The bare amorphous Al_(2)O_(3)-AlPO_(4)and Cs/Al_(2)O_(3)-AlPO_(4)catalysts were developed for the aldol condensation of methyl acetate with formaldehyde to methyl *** structure and property of catalyst were characterized by XRD,XPS,BET,Pyridine-IR,FT-IR,^(27)Al-MASNMR,NH_(3)-/CO_(2)-TPD and *** correlation between structural features and acid-base properties was established,and the loading effect of the cesium species was *** to cooperative catalytic effects between the penta-coordinated Al and Al_(2)O_(3),the weak-Ⅱacid and medium acid site densities and the product selectivity were *** the basic site densities of these catalysts were almost in proportion to the conversion of methyl *** loaded Cs could form new basic sites and change the distribution of acid sites which further enhance the catalytic *** a result,the 10Cs/8AlP was proved to be an optimal catalyst with the yield and selectivity of 21.2%and 85%for methyl acrylate *** the reaction,a deactivation behavior was observed on 10Cs/8AlP catalyst due to the carbon deposition,however,it could be regenerated by thermal treatment in the air atmosphere at 400℃.

关键词： Methyl acrylate(MA) Aldol condensation Al_(2)O_(3)-AlPO_(4) Penta-coordinated aluminum Cooperative effects

High-temperature oxidation behavior of SiBN fibers in air

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Journal of Advanced Ceramics 2021年第4期10卷 768-777页

作者： Xin LONG zhenyu wu Changwei SHAO Xiaozhou WANG Yingde WANG Science and Technology on Ceramic Fibers and Composites Laboratory College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410073China

SiBN fibers are one of the most admirable microwave-transparent reinforced materials for high Mach number ***,the detailed high-temperature oxidation behavior of SiBN fibers has not been studied *** this work,we studied the high-temperature oxidation behavior of SiBN fibers with different boron contents at the temperature range of 1000-1400℃in *** fibers started to be oxidized at 1100℃,with Si_(3)N_(4) and BN phase oxidized to SiO2 and B_(2)O_(3),*** to the gasification and the escape of molten B_(2)O_(3) at high temperatures,amorphous SiO_(2) could be remained at the fiber *** the fiber further oxidized,the molten B_(2)O_(3) at the inside may infiltrate into the fiber interior to react with Si_(3)N_(4),causing the precipitation of hexagonal boron nitride(h-BN)nanoparticles and the formation of SiO_(2)/BN ***,complex oxidation layers with two distinct concentric sublayers accompanied with two transition sublayers could be formed after the oxidizing treatment.

关键词： microwave-transparent SiBN fibers high-temperature oxidation resistance

Design and Preparation of Graphene/Fe_(2)O_(3) Nanocomposite as Negative Material for Supercapacitor

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Chemical Research in Chinese Universities 2022年第4期38卷 1097-1104页

作者： GAO Wei LI Yufeng ZHAO Jitao ZHANG Zhe TANG Weiwei WANG Jun wu zhenyu LI zhenyu School of Biology and Chemistry Engineering Panzhihua UniversityPanzhihua617000P.R.China Center of Functional Materials for Working Fluids of Oil and Gas Field School of New Energy and MaterialsSouthwest Petroleum UniversityChengdu610500P.R.China College of Materials Science and Engineering Heilongjiang University of Science and TechnologyHarbin150022P.R.China

The development of high specific capacitance electrode materials with high efficiency,scalability and economic feasibility is significant for the application of supercapacitors,however,the synthesis of electrode material still faces huge ***,graphene(G)/Fe_(2)O_(3) nanocomposite was prepared via a simple hydrothermal method connected with subsequent thermal reduction *** electron microscopy(SEM)and transmission electron microscopy(TEM)results showed rod-like Fe_(2)O_(3) nanoparticles were prepared and well-dispersed on graphene layers,providing a rich active site and effectively buffering the aggregation of Fe_(2)O_(3) nanoparticles in the process of electrochemical *** specific capacitance of the obtained G/Fe_(2)O_(3) nanocomposite as negative electrode for supercapacitor was 378.7 F/g at the current density of 1.5 A/g,and the specific capacitance retention was 88.76%after 3000 ***,the asymmetric supercapacitor(ASC)was fabricated with G/Fe_(2)O_(3) nanocomposite as negative electrode,graphene as positive electrode,which achieved a high energy density of 64.09 W·h/kg at a power density of 800.01 W/kg,maintained 30.07 W·h/kg at a power density of 8004.89 W/kg,and retained its initial capacitance by 78.04%after 3000 *** excellent result offered a promising way for the G/Fe_(2)O_(3) nanocomposite to be applied in high energy density storage systems.

关键词： Graphene Fe_(2)O_(3) Electrode material Supercapacitor

Covalent-organic frameworks with keto-enol tautomerism for efficient photocatalytic oxidative coupling of amines to imines under visible light

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Science China Chemistry 2021年第12期64卷 2169-2179页

作者： zhenyu wu Xiubing Huang Xiangjun Li Guangtong Hai Baozhen Li Ge Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China

Photocatalytic oxidation of organic molecules into highly value-added products is an innovative and challenging research which has gradually attracted remarkable attention of *** this work,it is demonstrated that the COF-TpPa with keto-enol tautomerism equilibrium structure shows excellent performance(yield>99%after 8 h)in the selective photocatalytic oxidative coupling of amines to imines under visible light *** is revealed that three kinds of reactive oxygen species(superoxide radical,hydroxyl radical and singlet oxygen)participate in this photocatalytic oxidation *** addition,hydrogen protons cleaved from the benzyl are proven to be reduced to hydrogen in the conduction band of COF-TpPa in anaerobic atmosphere,accompanied with the formation of *** direct hydrogen evolution from amine provides an effective way to extract clean energy from organic molecule as well as the production of value-added *** a contrast,COF-LZU1 with similar structure and chemical composition to COF-TpPa but without keto-enol tautomerism exhibits worse optical properties and photocatalytic *** is also demonstrated that keto-enol tautomerism favors the adsorption of benzylamine based on the characterization results and theoretical calculations.

关键词： covalent-organic frameworks photocatalysts aerobic/anaerobic benzylamine oxidation keto-enol tautomerism

High-throughput calculation-based rational design of Fe-doped MoS_(2) nanosheets for electrocatalytic p H-universal overall water splitting

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Journal of Energy Chemistry 2024年第4期91卷 194-202页

作者： Guangtong Hai Xiangdong Xue zhenyu wu Canyang Zhang Xin Liu Xiubing Huang Institute of Zhejiang University-Quzhou Zhejiang UniversityQuzhou 324000ZhejiangChina Beijing Key Laboratory of Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and TechnologyBeijing 100083China CentreÉnergie Matériaux et Télécommunications(EMT) Institut national de la recherche scientifique(INRS)Varennes J3X1P7QuébecCanada

Electrocatalytic water splitting is crucial for H2generation via hydrogen evolution reaction(HER)but subject to the sluggish dynamics of oxygen evolution reaction(OER).In this work,single Fe atomdoped MoS_(2)nanosheets(SFe-DMNs)were prepared based on the high-throughput density functional theory(DFT)calculation *** to the synergistic effect between Fe atom and MoS_(2)and optimized intermediate binding energy,the SFe-DMNs could deliver outstanding activity for both HER and *** assembled into a two-electrode electrolytic cell,the SFe-DMNs could achieve the current density of 50 mA cm^(-2)at a low cell voltage of 1.55 V under neutral *** results not only confirmed the effectiveness of high-throughput screening,but also revealed the excellent activity and thus the potential applications in fuel cells of SFe-DMNs.

关键词： High-throughput calculation Overall water splitting Single atom doped catalyst Molybdenum disulfide nanosheet

Rational architecture design of yolk/double-shells Si-based anode material with double buffering carbon layers for high performance lithium-ion battery

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Green Energy & Environment 2021年第4期6卷 517-527页

作者： zhenyu wu Jing Luo Jiao Peng Hong Liu Baobao Chang Xianyou Wang National Base for International Science&Technology Cooperation Hunan Province Key Laboratory of Electrochemical Energy Storage and ConversionSchool of ChemistryXiangtan UniversityXiangtan411105China Key Laboratory of Materials Processing and Mold of Ministry of Education Zhengzhou UniversityHenan450001China

Among the many strategies to fabricate the silicon/carbon composite,yolk/double-shells structure can be regarded as an effective strategy to overcome the intrinsic defects of Si-based anode materials for Li-ion batteries(LIBs).Hereon,a facile and inexpensive technology to prepare silicon/carbon composite with yolk/double-shells structure is proposed,in which the double buffering carbon shells are *** silicon/carbon nanoparticles with core-shell structure are encapsulated by SiO_(2)and external carbon layer,and it shows the yolk/double-shells structure via etching the SiO_(2)sacrificial *** multiply shells structure not only significantly improves the electrical conductivity of composite,but also effectively prevents the exposure of Si particles from the electrolyte ***,the yolk/double-shells structure can provide enough space to accommodate the volume change of the electrode during charge/discharge process and avoid the pulverization of Si ***,the as-prepared YDS-Si/C shows excellent performance as anode of LIBs,the reversible capacity is as high as 1066 mA h g^(-1) at the current density of 0.5 A g^(-1) after 200 *** the same time,the YDS-Si/C has high capacity retention and good cyclic ***,the unique architecture design of yolk/double-shells for Si/C composite provides an instructive exploration for the development of next generation anode materials of LIBs with high electrochemical performances and structural stability.

关键词： Silicon/carbon composite Structure design Yolk/double-shells Double buffering carbon layers Li-ion batteries

A branch-and-price algorithm to perform single-machine scheduling for additive manufacturing

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Journal of Management Science and Engineering 2023年第2期8卷 273-286页

作者： Lindong Liu zhenyu wu Yugang Yu School of Management University of Science and Technology of ChinaHefei230026China

Additive manufacturing(AM)has attracted significant attention in recent years based on its wide range of applications and growing *** offers the advantages of production flexibility and design *** this study,we considered a practical variant of the batch-processing-machine(BPM)scheduling problem that arises in AM industries,where an AM machine can process multiple parts simultaneously,as long as the twodimensional rectangular packing constraint is not *** on the set-partitioning formulation of our mixed-integer programming(MIP)model,a branch-and-price(B&P)algorithm was developed by embedding a column-generation technique into a branchand-bound ***,a novel labelling algorithm was developed to accelerate the column-generation *** is the first study to provide a B&P algorithm to solve the BPM scheduling problem in the AM *** tested the performance of our algorithm using a modern MIP solver(Gurobi)and real data from a 3D printing *** results demonstrate that for most instances tested,our algorithm produces results similar or identical to those of Gurobi with reasonable computation time and outperforms Gurobi in terms of solution quality and running time on some large instances.

关键词： Single-machine scheduling Branch and price Labelling algorithm Additive manufacturing

Insights into biobased epoxidized fatty acid isobutyl esters from biodiesel:Preparation and application as plasticizer

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Chinese Journal of Chemical Engineering 2022年第4期35卷 41-50页

作者： Xiaojiang Liang Fengjiao wu Qinglong Xie zhenyu wu Jinjin Cai Congwen Zheng Junhong Fu Yong Nie Biodiesel Engineering Lab of China Petroleum&Chemical Industry Federation and Zhejiang Province Key Lab of BiofuelZhejiang University of TechnologyHangzhou 310014China Zhejiang Jiaao Enprotech Stock Co. LtdTongxiang 314000China

Biodiesel was used to prepare epoxidized fatty acid isobutyl esters(Ep-FABEs)as a biobased plasticizer in this *** of biodiesel with isobutanol catalyzed by tetrabutyl titanate was carried out in a gas-liquid tower *** conversion achieved nearly 100%within 5 h under the reaction temperature,the mass ratio of catalyst to fatty acid methyl esters(FAMEs),and isobutanol to FAMEs total molar ratio of 180℃,0.4%(mass),and 5.4:1,*** addition,kinetic model of the transesterification reaction was developed at 150–190℃.The calculated activation energy was 48.93 kJ·mol^(-1).Then,the epoxidation of obtained fatty acid isobutyl esters(FABEs)was conducted in the presence of formic acid and hydrogen *** Ep-FABEs was further analyzed for its plasticizing effectiveness to replace dioctyl phthalate(DOP)and compared with conventional epoxy plasticizer epoxidized fatty acid methyl esters(Ep-FAMEs).The results indicated that the thermal stability and mechanical properties of PVC films with Ep-FABEs plasticizer were significantly improved compared with those plasticized with *** addition,the extraction resistance and migration stability of Ep-FABEs were better than those of ***,the prepared Ep-FABEs via structural modification of biodiesel proved to be a promising biobased plasticizer.

关键词： Biodiesel Transesterification Isobutyl esters Epoxidized isobutyl esters Biobased plasticizer

The accurate localization of fluorescent nanoparticle Au-Ft in nu/nu mice kidney

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Journal of Innovative Optical Health Sciences 2014年第3期7卷 83-90页

作者： Hui Yang Cuji Sun Jun Jia Guangjun Nie zhenyu wu Department of Immunology Guang'anmen HospitalP.R.China Academy of Chinese Medical Sciences Beijing 100053P.R.China CAS Key Laboratory for Biomedical Effects of Nanomaterials&Nanosafety Nationai Center for Nanoscience and Technology Beijing 100190 P.R.China Chilong Healthcare Intermational Limited Beijing 1000%0 P.R.China

Au-Ft,as a green synthesized nanoparticle,is composed of a ferritin nanocage enclosing a pair of Au nanoclusters *** previous study has demonstrated that Au-Ft can be an excellentfluorescent probe for whole body imaging of mice with kidney specific ***,the accuratelocalization of Au-Ft in kidney is still *** the current study,we detected and assessed the cellular and subcellular localization of Au-Ft in renal cortex and medulla of nu/nu mice after tailvein injection by using Nuance optical system(CRi,Woburn,USA)and inForm intelligent image analysis soft ware based on single cell *** obtained the fluorescence intensity and cellular location of kidney-targeting Au-Ft probe in particular cell of renal glomerulus or renaltubules,which provided valuable proofs to clarify the mechanism of Au-Ft selective enrichment in kidney and the associated metabolic processes.

关键词： Au-Ft nanoparticle kidney targeting cellular localization renal cortex and medlla multispectral imaging

Layered double hydroxide nanosheets activate CsPbBr_(3) nanocrystals for enhanced photocatalytic CO_(2) reduction

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Nano Research 2022年第7期15卷 5953-5961页

作者： Shuang Zhao Qian Liang Zhongyu Li Hong Shi zhenyu wu Hui Huang Zhenhui Kang Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipa 999078MacaoChina Institute of Advanced Materials Northeast Normal UniversityChangchun 130024China

Halide perovskite nanocrystals are potential catalysts for CO_(2) photoreduction,while,the strong radiative recombination and insufficient stability limit their catalytic performance and ***,we report that layered double hydroxide nanosheets activate CsPbBr_(3) nanocrystals(CLDH)for enhanced photocatalytic CO_(2) *** CLDH heterojunctions show the remarkably enhanced CO_(2) photoreduction performance;without cocatalyst and sacrificial agent,the average electron consumption rate of CLDH(49.16μmol·g^(−1)·h^(−1))is approximately 3.7 times higher than that of pristine CsPbBr_(3).Also,CLDH catalyst exhibits a robust stability after ten cycles over 30 h.

关键词： CsPbBr_(3) NiAl-LDH CO_(2)reduction Z-scheme photocatalysis