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Visible light induced oxidative coupling of purines with arenes

Chinese Chemical Letters 2023年第3期34卷 313-316页

作者： Lamei Liao Dongen Lin Gary Histand Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641China The International School of Advanced Materials School of Material Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

The photocatalyzed synthesis of 9-arylpurines has been developed using 9H-purines and non-activated *** method is highly atom economical using an acridinium photocatalyst induced by visible light under air atmosphere ... 详细信息

关键词： Visible light Photocatalysis Purine derivatives C–N bond formation Additive free

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Effect of heat treatment solid solution temperature on high-temperature performance and diffusion welding tissue of IC10 superalloy 4

Effect of heat treatment solid solution temperature on high-...

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2024 4th International Conference on advanced materials and Mechatronics, ICAMM 2024

作者： Li, Qi Liu, Fengmei Gao, Haitao Zhang, Xueying Gao, Shiyi China China-Ukraine Belt and Road Joint Laboratory on Material Joining and Advanced Manufacturing Guangdong Academy of Sciences Guangdong Provincial Key Laboratory of Advanced Welding Technology China-Ukraine Institute of Welding Guangdong Academy of Sciences Guangzhou510650 China

IC10 superalloys with small pressure and large gaps were welded by TLP diffusion welding. Based on this, the effects of heat treatment on the weld organization and welding performance of IC10 joints were discussed. The results showed that when SBM-3 was used as intermediate solder, the weld structure was similar to that of base metal under the welding process of 1250°C, 0.2 MPa, and 6h. The tensile strength was 133.7 MPa at the temperature of 1100°C. After heat treatment mechanism A, in the joint structure, a larger volume concentration of γ+γ′ phase existed in the weld, smooth transition from base metal to welded joint. Under the heat treatment mechanism A, the tensile strength at 1100°C high temperature can reach 204.6MPa (more than 85% strength of IC10). The appropriate heat treatment mechanism can get small enough micro holes and low enough porosity joints, ensuring the excellent high-temperature mechanical properties of high-temperature alloy. © Published under licence by IOP Publishing Ltd.

关键词： Tensile strength

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Predicting fatigue life of automotive adhesive bonded joints:a data-driven approach using combined experimental and numerical datasets

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Advances in Manufacturing 2024年第3期12卷 522-537页

作者： Chen-Di Wei Qiu-Ren Chen Min Chen Li Huang Zhong-Jie Yue Si-Geng Li Jian Wang Li Chen Chao Tong Qing Liu School of Advanced Technology Xi’an Jiaotong-Liverpool UniversitySuzhou215123People’s Republic of China Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing210009People’s Republic of China Material Academy JITRISuzhou215100People’s Republic of China Nanjing University of Science and Technology Nanjing210094People’s Republic of China

The majority of vehicle structural failures originate from joint *** loading is one of the primary factors in joint failures,making the fatigue performance of joints a critical consideration in vehicle structure *** use of traditional fatigue analysis methods is constrained by the absence of adhesive life data and the wide variety of joint ***,there is a pressing need for an accurate fatigue life estimation method for the joints in the automotive *** this work,we proposed a data-driven approach embedding physical knowledge-guided parameters based on experimental data and finite element analysis(FEA)*** machine learning(ML)algorithms are adopted to investigate the fatigue life of three typical adhesive joints,namely lap shear,coach peel and KSII *** the feature engineering and tuned process of the ML models,the preferable model using the Gaussian process regression algorithm is established,fed with eight input parameters,namely thicknesses of the substrates,line forces and bending moments of the adhesive bonded joints obtained from *** proposed method is validated with the test data set and part-level physical tests with complex loading states for an unbiased *** demonstrates that for life prediction of adhesive joints,the data-driven solutions can constitute an improvement over conventional solutions.

关键词： Fatigue life Adhesive bonded joints Finite element analysis(FEA) Machine learning(ML)

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From binary to ternary and back to binary:Transition of electromagnetic wave shielding to absorption among MAB phase Ni_(3)ZnB_(2)and corresponding binary borides Nin+1Bn(n=1,3)

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Journal of advanced Ceramics 2023年第11期12卷 2101-2111页

作者： Chengwen Wu Fan Zhang Qin Zhi Bo Song Yongqiang Chen Hailong Wang Rui Zhang Hongxia Li Bingbing Fan School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Vocational College of Information and Statistics Zhengzhou 450008China School of Material Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China State Key Laboratory of Advanced Refractories Sinosteel Luoyang Institute of Refractories Research Co.Ltd.Luoyang 471039China

Due to chemical inertness of nickel and boron,the preparation of nickel borides and corresponding layered ternary transition metal borides Ni_(3)ZnB_(2)(MAB phase)has always required high-temperature and/or high-pressure ***,an innovative and efficient approach to preparing Ni_(3)ZnB_(2)at only 600℃and without applied pressure is presented in this *** is discovered that by simply adjusting the temperature,a phase transition from Ni_(3)ZnB_(2)to Ni4B3 with a layered structure could be *** transition between the binary-component and the ternary-component brings about significant variation in electromagnetic wave(EMW)shielding/absorption performance of prepared *** instance,Ni2B has good EMW shielding performance(42.54 dB in X band)and Ni_(3)ZnB_(2)is of weak EMW shielding(13.43 dB in X band);Ni_(3)ZnB_(2)has poor EMW absorption performance(−5 dB)while Ni4B3 has excellent EMW absorption performance(−45.19 dB)at a thickness of 2.7 mm with effective absorption bandwidth(10.4 GHz).

关键词： nickel borides Ni_(3)ZnB_(2) electromagnetic wave(EMW)shielding properties electromagnetic wave absorbing properties

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Revealing the Promoting Eff ect of CeO_(2)on the Cu/ZnO Catalyst for Methanol Steam Reforming

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Transactions of Tianjin University 2024年第6期30卷 544-552页

作者： Mengyuan Zhu Didi Li Zhaocong Jiang Shiqing Jin Qing Zhang Haoyuan Gu Yi-Fan Han Minghui Zhu State Key Laboratory of Green Chemical Engineering and Industrial Catalysis School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education Zhengzhou UniversityZhengzhou 450001China

Cu-based catalysts have been extensively used in methanol steam reforming(MSR)reactions because of their low cost and high effi *** is often used in commercial Cu-based catalysts as both a structural and an electronic promoter to stabilize metal Cu nanoparticles and modify metal–support ***,the further addition of chemical promoters is essential to further enhance the MSR reaction performance of the Cu/ZnO *** this work,CeO_(2)-doped Cu/ZnO catalysts were prepared using the coprecipitation method,and the eff ects of CeO_(2)on Cu-based catalysts were systematically *** with appropriate CeO_(2)amounts could stabilize small Cu nanoparticles through a strong interaction between CeO_(2)and Cu,leading to the formation of more Cu+–ZnO x interfacial ***,higher CeO_(2)contents resulted in the formation of larger Cu nanoparticles and an excess of Cu+–CeO x interfacial ***,the Cu/5CeO_(2)/ZnO catalyst with maximal Cu–ZnO interfaces exhibited the highest H 2 production rate of 94.6 mmolH2/(gcat·h),which was 1.5 and 10.2 times higher than those of Cu/ZnO and Cu/CeO_(2),respectively.

关键词： Methanol steam reforming Cu/ZnO catalyst CeO_(2)promoter Metal–support interaction Interfacial site

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Graphene oxide as a hole extraction layer loaded on BiVO_(4)photoanode for highly efficient photoelectrochemical water splitting

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Rare Metals 2022年第11期41卷 3795-3802页

作者： Min-Li Guo Shi-Peng Wan Cao-Long Li Kan Zhang Key Laboratory of Biomedical Functional Materials School of ScienceChina Pharmaceutical UniversityNanjing211198China Institute of Optoelectronics and Nanomaterials MIIT Key Laboratory of Advanced Display Material and DevicesCollege of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China

The tailor-made oxygen evolution catalysts(OECs)paired with photoanodes offer a path to promote water oxidation kinetics;however,the unsatisfied interface between OECs and photoanode sets a barrier for efficient charge ***,a graphene oxide(GO)layer to promote the charge transfer from BiVO_(4)(BVO)to NiOOH OEC is *** is found that GO layer inserted between BVO and NiOOH can not only serve as hole extraction layer due to its hole storage capability,but also improve the ***,the rationally designed NiOOH/GO/BVO photoanode achieves a photocurrent density of 3.81 mA·cm^(-2)at 1.23 V(*** hydrogen electrode(RHE)),which is 3.85 times as high as that of bare *** work opens up low-cost auxiliary materials for enhancing photoelectrochemical water splitting.

关键词： BiVO_(4) Water splitting Charge extraction Oxygen evolution catalyst Graphene oxide

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Textured CsPbI_(3) nanorods composite fibers for stable high output piezoelectric energy harvester

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eScience 2024年第5期4卷 150-159页

作者： Tao Yang Dengzhou Jia Bing Xu Yongfei Hao Yanglong Hou Kang Wang Enhui Wang Zhentao Du Sheng Cao Kuo-Chih Chou Xinmei Hou Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China Institute of Steel Sustainable Technology Liaoning Academy of MaterialsShenyang 110000China School of Materials Shenzhen Campus of Sun Yat-Sen UniversityShenzhen 518107China MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

The utilization of piezoelectric nanogenerator(PENG)based on halide perovskite materials has demonstrated significant promise for energy harvesting ***,the challenge of synthesizing halide perovskite materials with both high output performance and stability using a straightforward process persists as a substantial ***,we present the fabrication of CsPbI_(3) nanorods(NRs)exhibiting highly uniform orientation within polyvinylidene fluoride(PVDF)fibers through a simple texture engineering approach,marking the instance of enhancing PENG performance in this *** resultant composite fibers showcase a short-circuit current density(I_(sc))of 0.78μAcm^(-2) and an open-circuit voltage(V_(oc)) of 81V,representing a 2.5 fold increase compared to the previously reported highest value achieved without the electric poling *** outstanding output performance is ascribed to the orientation of CsPbI_(3) NRs facilitated by texture engineering and dipole poling via the self-polarization ***,the PENG exhibits exceptional thermal and water stability,rendering it suitable for deployment in diverse and challenging environmental *** findings underscore the significant potential of textured CsPbI_(3) NRs composite fibers for powering low-power consumer electronics,including commercial LEDs and electronic watches.

关键词： Texture engineering CsPbI_(3) Piezoelectric nanogenerator Self-polarization Electrospinning

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Micromechanical interlocking-inspired dendritic porous silicabased multimodal resin composites for the tooth restoration

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Nano Research 2024年第10期17卷 9065-9077页

作者： Hongyan Chen Junjun Wang Shi Yin Ruili Wang Xinquan Jiang Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and EngineeringDonghua UniversityShanghai 201620China Shanghai Engineering Research Center of Advanced Dental Technology and Materials Shanghai Key Laboratory of StomatologyShanghai Research Institute of StomatologyNational Clinical Research Center for Oral DiseasesShanghai Ninth People’s HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghai 200011China

Porous silica particles have shown great potential application as reinforcing fillers in the field of dentistry due to their ability to construct the micromechanical interlocking effect at filler-matrix ***,how to accurately regulate the pore structure,especially the pore size,to increase the degree of the micromechanical interlocking and the performance of materials remains a ***,we have proposed a facile self-assembly process to synthesize dendritic porous silica with tunable pore sizes(DPS-x)by adjusting the chain-length of the alcohols in the *** mechanism of nucleation-growth is further put *** results indicate that the pore size of DPS-x indeed affects the mechanical property of composites,where the DPSpen particles with intermediate pore size are chosen as the optimal reinforcing *** bimodal and multimodal filler formulations are further established to address the loading limitation of unimodal DPS-pen(46 wt.%).In virtue of the closepacked structure of identical spheres,the particle sizes of secondary silica embedded into the maximally loaded bimodal D3S7 composite(DPS-pen:Si430=30:70,w/w)are theoretically calculated without *** all formulations,the developed multimodal D3S7+Si178+Si90 filler exhibits superior mechanical properties,the lowest shrinkage,and high polymerization conversion for dental composites,along with satisfied waster sorption and solubility,and good biocompatibility in vitro and in vivo,which are comparable to commercial composite Z350 XT(3M,USA).These DPS-x particles and their multimodal fillers can also be applied to other polymer-based biomaterials.

关键词： porous silica pore size multimodal filler dental composite physicochemical properties biosafety

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Electromagnetic responses on microstructures of duplex stainless steels based on 3D cellular and electromagnetic sensor finite element models

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International Journal of Minerals,Metallurgy and materials 2024年第12期31卷 2681-2691页

作者： Shuaishuai Xiao Jialong Shen Jianing Zhao Jie Fang Caiyu Liang Lei Zhou Key Laboratory of New Technology of Nonferrous Metals and Materials Processing Ministry of EducationGuilin university of technologyGuilin 541004China Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi Guilin University of TechnologyGuilin 541004China Advanced Manufacturing and Materials Centre Warwick Manufacturing Group(WMG)University of WarwickCoventry CV47ALUK

Microstructures determine mechanical properties of steels,but in actual steel product process it is difficult to accurately control the microstructure to meet the *** microstructure characterization methods are time consuming and results are not rep-resentative for overall quality level as only a fraction of steel sample was selected to be *** this paper,a macro and micro coupled 3D model was developed for nondestructively characterization of steel *** electromagnetic signals analysis,the relative permeability value computed by the micro cellular model can be used in the macro electromagnetic sensor *** effects of different microstructure components on the relative permeability of duplex stainless steel(grain size,phase fraction,and phase distribu-tion)were *** output inductance of an electromagnetic sensor was determined by relative permeability values and can be val-idated *** findings indicate that the inductance value of an electromagnetic sensor at low frequency can distinguish dif-ferent *** method can be applied to real-time on-line characterize steel microstructures in process of steel rolling.

关键词： microstructure electromagnetic sensor finite element duplex stainless steel

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An atomic insight into effect of grain boundary on diffusion behavior of Cu/Al dissimilar materials undergoing ultrasonic welding

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Journal of Iron and Steel Research International 2024年第10期31卷 2555-2567页

作者： Jing-wei Yang Chu-hao Xie Jie Zhang Zong-ye Ding Jian Qiao School of Mechatronic Engineering and Automation Foshan UniversityFoshan528225GuangdongChina School of Mechanical Engineering University of Science and Technology BeijingBeijing100083China Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Advanced Brazing Filler Metals&Technology Zhengzhou Research Institute of Mechanical Engineering Co.Ltd.Zhengzhou450001HenanChina

The diffusion processes in bicrystalline Cu/Al joints,characterized by typical high-angle grain boundaries(GBs),were investigated using molecular dynamics *** was found that GBs facilitated the diffusion of both Cu and Al atoms,predominantly enhancing the migration of Cu atoms into Al *** to mean squared displacement results,the movement of Al atoms within Al matrix was more vigorous than that of Cu *** mechanisms of atomic rearrangement,dislocation movement,stacking fault formation,and dynamic recrystallization were *** the compression and initial welding stages,the mismatch in lattice constants and the twisting of grains initiated a squeeze-induced rearrangement of Al atoms at the interface,leading to the formation of dislocations and *** the advanced stages of welding,the plastic deformation primarily occurred within Al matrix,marked by the emergence of dislocations,stacking faults,and GB ***,the shearing effect during the ultrasonic welding process,combined with GB sliding,collectively induced grain recrystallization at the ***,the diffusion between Cu/Al joints could be enhanced by increasing the vibration frequency,due to a significant rise in the number of amorphous regions.

关键词： Grain boundary Molecular dynamics Diffusion behavior Ultrasonic welding Dissimilar material

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