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Journal of Environmental Sciences 2024年第2期136卷 213-225页

作者： Bowen Xu Jiaxin Qu Xueqian Wang Langlang Wang Yu Pu Ping Ning Yibing Xie Yixing Ma Qiang Ma Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China School of Architecture and Civil Engineering Chengdu UniversityChengdu 610106China

To investigate the enhancing effect of mn on the performance of simultaneous catalytic oxidation of AsH_(3)and PH_(3)by CuO-Al_(2)O_(3)in a reducing atmosphere under micro-oxygen conditions,Cu-mn modifiedγ-Al_(2)O_(3)catalysts were *** characteristics of the catalysts showed that mn reduced the crystallinity of the active CuO component,increased the number of oxygen vacancies and acidic sites on the catalyst surface,enhanced the mobility of surface oxygen,and the interaction between copper and manganese promoted the redox cycling ability of the catalysts and improved their oxidation performance,which increased the conversion frequency(TOF)by 2.54×10^(-2)to 3.07×10^(-2)sec^(-1).On the other hand,the introduction of mn reduced the production of phosphate and As_(2)O_(3)on the catalyst surface by30.96%and 44.9%,which reduced the coverage and inerting of the active sites by phosphate and As_(2)O_(3),resulting in an 8 hr(6 hr)improvement in the stability of PH_(3)(AsH_(3))removal.

关键词： AsH_(3)-PH_(3)removal Oxygen activation mn doping Stability enhancement

mn doping effects on the gate-tunable transport properties of Cd3As2 films epitaxied on GaAs

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Journal of Semiconductors 2020年第7期41卷 33-38页

作者： Hailong Wang Jialin Ma Qiqi Wei Jianhua Zhao State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering&CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China Beijing Academy of Quantum Information Sciences Beijing 100193China

The mn doping effects on the gate-tunable transport properties of topological Dirac semimetal Cd3As2 films have been ***-doped Cd3As2 films are directly grown on GaAs(111)B substrates by molecular-beam epitaxy,during which the single crystal phase can be obtained with mn concentration less than 2%.Shubnikov-de Haas oscillation and quantum Hall effect are observed at low temperatures,and electrons are found to be the dominant carrier in the whole temperature *** mn content results in smaller lattice constant,lower electron mobility and larger effective band gap,while the carrier density seems to be unaffected by *** experiments show that Shubnikov-de Haas oscillation and quantum Hall effect are slightly modulated by electric field,which can be explained by the variation of electron *** results provide useful information for understanding the magnetic element doping effects on the transport properties of Cd3As2 films.

关键词： molecular-beam epitaxy Dirac semimetal Cd3As2 film mn doping quantum transport

Effect of mn doping on mechanical properties and electronic structure of WCoB ternary boride by first-principles calculations

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Chinese Physics B 2018年第10期27卷 537-547页

作者： Tong Zhang Hai-Qing Yin Cong Zhang Xuan-Hui Qu Qing-Jun Zheng Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Beijing 100083 China Beijing Key Laboratory of Materials Genome Initiative University of Science and Technology Beijing Beijing 100083 China Kennametal Inc 1600 Technology Way PA 15650 USA

The first-principles calculations are performed to investigate the structural, mechanical property, hardness, and electronic structure of WCoB with 0, 8.33, 16.67, 25, and 33.33 at.% mn doping content and W_2 CoB_2 with 0, 10, and 20 at.%mn doping content. The cohesive energy and formation energy indicate that all the structures can retain good structural stability. According to the calculated elastic constants, mn is responsible for the increase of ductility and Poisson＇s ratio and the decrease of Young＇s modulus, shear modulus, and bulk modulus. By using the population analysis and mechanical properties, the hardness is characterized through using the five hardness models and is found to decrease with the mn doping content increasing. The calculated electronic structure indicates that the formation of a B–mn covalent bond and a W–mn metallic bond contribute to the decreasing of the mechanical properties.

关键词： mn doping WCoB electronic structure first-principles calculations

Bulk superconductivity in one-step grown Fe(Te,Se)crystals free of interstitial iron by minor mn doping

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Science China Materials 2022年第9期65卷 2472-2478页

作者： Yadong Gu Menghu Zhou Mengdi Zhang Yanwei Wu Binbin Ruan Xingyuan Hou Fan Zhang Peijie Jiang Qingsong Yang Geng Li Mingwei Ma Genfu Chen Lei Shan Zhian Ren Institute of Physics and Beijing National Laboratory for Condensed Matter Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Academy of Quantum Information Sciences Beijing 100193China Information Materials and Intelligent Sensing Laboratory of Anhui Province Institutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Institutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China

The iron-based nontoxic chalcogenide superconductor Fe(Te,Se)has great potential for high magnetic field applications while it lacks a reliable method to produce bulk superconductor so *** we report a one-step synthesis method to grow high-quality Fe(Te,Se)single crystals free of interstitial iron atoms through minor mn *** superconductivity is revealed in the as-grown centimetersized crystals with the optimal doping level of 1% Fe atoms substituted by mn,which is systematically demonstrated by sharp electrical resistivity and magnetic susceptibility transitions,and large specific heat *** with the undoped sample,the optimally doped one shows a significantly enhanced upper critical field,and a large self-field critical current density J_(c) of 4.5×10^(5)A cm^(-2) at 2 K(calculated by the Bean model),which maintains large values under high *** absence of interstitial iron atoms is testified by the scanning tunneling microscopy,and the effect of mn doping is *** results provide a practical method by minor mn doping to directly synthesize high-performance Fe(Te,Se)bulks that allow for future high-field superconducting applications.

关键词： iron chalcogenide Fe(Te,Se) critical current density mn doping

Simultaneous heterostructure engineering and mn doping modulation of Ni_(2)P nanosheet arrays for enhanced electrocatalytic water splitting

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Science China Materials 2022年第7期65卷 1814-1824页

作者： Yuanzhi Luo Pan Wang Sisi Wu Gaixia Zhang Shuhui Sun Hariprasad Ranganathan Zhicong Shi Institute of Batteries School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China The Key Laboratory of Fuel Cell Technology of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641China énergie Matériaux Télécommunications Research Centre Institut National de la Recherche Scientifique(INRS)VarennesQuébecJ3X 1S2Canada

Efficient,low-cost,and stable electrocatalysts for water splitting are highly ***,three-dimensional(3D)Ni_(2)P nanosheet arrays were fabricated and simultaneously modulated by heterostructure engineering and mn doping(mn-doped Ni_(2)O_(3)/Ni_(2)P and mn-doped Ni_(x)S_(y)/Ni_(2)P)via a facile hydrothermal reaction and subsequent phosphorization and *** to the mn doping,synergistic effect in the heterostructures,and abundantly exposed active sites from the 3D-nanosheet arrays,mn-doped Ni_(2)O_(3)/Ni_(2)P and mn-doped Ni_(x)S_(y)/Ni_(2)P exhibit excellent properties for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER),*** former achieves an excellent current density of-10 mA cm^(-2) at a low overpotential of 104 mV for HER,while the latter attains 100 mA cm^(-2) for OER at an ultralow overpotential of 290 mV and exhibits superior stability at 50 mA cm^(-2) for 160 ***,the mndoped Ni_(2)O_(3)/Ni_(2)P//mn-doped Ni_(x)S_(y)/Ni_(2)P couple show high overall-water-splitting activity with a cell voltage of 1.65 V at 10 mA cm^(-2) and outstanding durability at 50 mA cm^(-2) for 120 h in an alkaline *** work presents an effective strategy to design and synthesize low-cost and highly active non-noble metal electrocatalysts for overall water splitting through the simultaneous application of heterostructure engineering,foreign-metal-atom doping,and a 3Dnanoarray *** strategy brings a paradigm shift toward the mass production of low-cost non-noble metal electrocatalysts for renewable energy devices.

关键词： water splitting Ni_(2)P heterostructure mn doping three-dimensional nanosheet arrays

mn-doping induced electronic modulation and rich oxygen vacancies on vertically grown NiFe2O4 nanosheet array for synergistically triggering oxygen evolution reaction

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Nano Research 2022年第5期15卷 3940-3945页

作者： Yonghao Gan Meilin Cui Xiaoping Dai Ying Ye Fei Nie Ziteng Ren Xueli Yin Baoqiang Wu Yihua Cao Run Cai Xin Zhang State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of PetroleumBeijing 102249China

Large-scale electrolysis of water to produce high-purity hydrogen is one of the effective ways to solve the energy crisis and environmental pollution ***,efficient,cheap and stable catalysts are one of the bottlenecks for industrial application in water ***,a facile one-step hydrothermal process was applied to fabricate mn-doped nickel ferrite nanosheets(mn-NiFe_(2)O_(4))which shown a low overpotential of 200 mV at 50 mA·cm^(-2)and a small Tafel slope of 47 mV·dec^(-1),together with a prominent turnover frequency(TOF)value(0.14 s^(-1))and robust *** in-situ UV-vis spectroscopy unveiled the surface reconstruction to generate NiOOH as active sites during oxygen evolution reaction(OER).The excellent electrocatalytic activity of mn-NiFe_(2)O_(4)is attributed to the vertically grown nanosheets for exposure more active sites,rich oxygen vacancies,and the hybridization between Ni 3d and O 2p orbitals caused by mn *** work should provide a facile strategy by mn-doping to simultaneously engineer oxygen vacancies and electronic structure for synergistically triggering oxygen evolution reaction.

关键词： mn doping NiFe_(2)O_(4)nanosheets oxygen vacancies electronic modulation oxygen evolution reaction

Comprehensive optimization of piezoelectric coefficient and depolarization temperature in mn-doped Bi_(0.5)Na_(0.5)TiO_(3)-Bi_(0.5)K_(0.5)TiO_(3)-BaTiO_(3)lead-free piezoceramics

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Journal of Materials Science & Technology 2024年第5期172卷 255-263页

作者： Huashan Zheng Enwei Sun Huajie Luo Xiaoyu Zhang Yixiao Yang Bin Yang Rui Zhang Shantao Zhang Wenwu Cao Condensed Matter Science and Technology Institute School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin150080China Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China National Laboratory of Solid State Microstructures Department of Materials Science and EngineeringCollege of Engineering and Applied Science&Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China Department of Mathematics and Materials Research Institute The Pennsylvania State UniversityUniversity ParkPennsylvania16802United States of America

Lead-free Bi_(_(0.5))Na_(_(0.5))TiO_(3)(BNT)piezoelectric ceramics have the advantages of large coercive fields and high Curie *** the improvement of piezoelectric coefficient(d 33)is usually accompanied by a huge sacrifice of depolarization temperature(T d).In this work,a well-balanced performance of d 33 and T d is achieved in mnO_(2)-doped 0.79(Bi_(_(0.5))Na_(_(0.5))TiO_(3))-0.14(Bi_(0.5)K_(0.5)TiO_(3))-0.07BaTiO_(3)ternary *** in-corporation of 0.25 mol%mnO_(2)enhances the d 33 by more than 40%,while T d remains almost unchanged(i.e.,d 33=181 pC/N,T d=184℃).X-ray diffraction(XRD)shows that an appropriate fraction of the small axis-ratio ferroelectric phase(pseudo-cubic,P c)coexists with the long-range ferroelectric phase(tetrag-onal,T)under this mnO_(2)*** force microscopy(PFM)has revealed a special domain configuration,namely large striped and layered macro domains embedded with small *** study provides a distinctive avenue to design BNT-based piezoelectric ceramics with high piezoelectric performance and temperature stability.

关键词： BNT-BKT-BT ceramics mn doping Piezoelectric Depolarization temperature Phase structure

Facile preparation and efficient mnxCoy porous nanosheets for the sustainable catalytic process of soot

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Green Energy & Environment 2024年第3期9卷 516-528页

作者： Miaomiao Hu Kun Zhou Tingyi Zhao Zheng Li Xianhai Zeng Di Yu Xuehua Yu Mingqin Zhao Zhihui Shao Qixiang Xu Bing Cui Flavors and Fragrance Engineering&Technology Research Center of Henan Province College of Tobacco ScienceHenan Agricultural UniversityZhengzhou450002China School of Ecology and Environment Zhengzhou UniversityZhengzhou450001China College of Energy Xiamen UniversityXiamen361102China College of Chemistry and Chemical Engineering Shenyang Normal UniversityShenyang110034China

The pursuit of high-performance is worth considerable effort in catalysis for energy efficiency and environmental sustainability. To develop redox catalysts with superior performance for soot combustion, a series of mn_(x)Co_(y) oxides were synthesized using MgO template *** method greatly improves the preparation and catalytic efficiency and is more in line with the current theme of green catalysts and sustainable development. The resulting mn_(1)Co_(2.3) has a strong activation capability of gaseous oxygen due to a high concentration of Co^(3+) and mn^(3+). The mn doping enhanced the intrinsic activity by prompting oxygen vacancy formation and gaseous oxygen adsorption. The nanosheet morphology with abundant mesoporous significantly increased the solid–solid contact efficiency and improved the adsorption capability of gaseous reactants. The novel design of mn_(1)Co_(2.3)oxide enhanced its catalytic performance through a synergistic effect of mn doping and the porous nanosheet morphology, showing significant potential for the preparation of high-performance soot combustion catalysts.

关键词： Soot combustion Intrinsic activity Contact efficiency mn doping DFT

Microstructure and shear properties evolution of mn-doped SAC solder joint under isothermal aging

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Journal of Iron and Steel Research International 2023年第8期30卷 1650-1660页

作者： Cheng-ming Li Shu-jin Chen Shan-shan Cai Ju-bo Peng Xiao-jing Wang Ying-wu Wang School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina R&D Center Yunnan Tin Group(Holding)Co.Ltd.Kunming 650000YunnanChina Modern School of Engineering Yunnan UniversityKunming 650091YunnanChina

The effects of mn addition(0.005,0.01,0.03,0.05,and 0.07 wt.%)on microstructure,shear mechanical behavior,and interfacial thermal stabilities of SAC305 joints were investigated under isothermal aging temperatures of 170 C with different aging time(0,250,500,and 750 h).It is found that mn addition can increase fracture energy of joints without decreasing the shear *** the microstructures have transformed from the eutectic net-like structure in SAC305 solder joints into the structures based onβ-Sn matrix with intermetallic compounds(IMCs)*** doping 0.07 wt.%mn,the Cu_(6)Sn_(5) growth along the SAC305/Cu interface during thermal aging can be inhibited to some *** isothermal aging at 170°C,the maximum shear force of solder joint decreases continuously with aging time increasing,while the fracture energy rises first and then decreases,reaching the maximum at 500 h compared by that with the microstructure ***_(3)Sn growth between Cu_(3)Sn_(5)/Cu interface has been retarded most at the aging time of 250 h with 0.07 wt.%mn-doped *** the aging time prolonging,the inhibition effect of mn on CusSn IMC layer becomes *** strengthening effect of mn can be explained by precipitation strengthening,and its mechanical behavior can be predicted by particle strengthening model proposed by Orowan.

关键词： SAC305 solder mn doping Shear mechanical behavior Isothermal aging Interfacial intermetallic compound

A chemophotothermal and targeting multifunctional nanoprobe with a tumor-diagnosing ability

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Nano Research 2018年第8期11卷 4333-4347页

作者： Niannian Li Jiejun Cheng Ying Zhang Jie Wang Gang Huang Jun Zhu Dannong He School of Materials Science and Engineerinq Shanqhai Jiao Tona University 800 Donachuan Road. Shanahai 2130240 Chinn Department of Radiology Renji Hospital School of Medicine Sh-anghai Jiao Tong University Shanghai200127 China Shanghai University of Medicine & Health Sciences 2 79 Zhou Zhu highway Shanghai 201318 China National Engineering Research Center for Nanotechnology 28 East Jiang Chuan Road Shanghai20024 I China Niannian Li Jiejun Cheng and Ying Zhang contributed equally to this work.

The development of multifunctional nanoparticles for diagnosis and therapy of cancer has been a focus of research in recent years. Owing to excellent properties of chemophotothermal therapy and tumor targeting accompanied by magnetic resonance （MR） or computed tomography （CT） imaging, mesoporous silica has been widely applied to tumor diagnosing carriers. However, previous research focused more on chemotherapy combined with photothermal therapeutic strategies but ignored intuitive assessment of tumors. In this work, we report a novel nanoprobe consisKng of hyaluronic-acid-modified gold nanorods@mSiO2@mn@DOX （GNR@MMH@DOX） nanoparticles, which realize multifunctional integration of therapeutics and imaging. Au nanorods （GNRs） were synthesized without a seed precursor by a water bath method, then sequentially modified with mesoporous silica, doped with mn2＋, and loaded with doxorubicin in a solution. In vitro and in vivo assays verified their great biocompatibility, good stability, and attractive specificity of targeting to receptor CD44, which is overexpressed on cancer cells. In addition, GNR@MMH nanoparticles proved to be a more distinguishable CT/MR imaging contrast compared to commercial contrast agents. The article demonstrates promising composition for CT/MR imaging and photothermal therapy of tumors, giving new insights into the diagnosis and therapy of different kinds of malignant tumors.

关键词： gold nanorods mn doping magnetic resonance orcomputed tomography(MR/CT) imaging chemophotothermaltherapy