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Nickel cobalt phosphide with three-dimensional nanostructure as al highly efficient electrocatalyst for hydrogen evolution reaction in both I acidic and alkaline electrolytes

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Nano Research 2019年第2期12卷 375-380页

作者： Bo Ma zhengchun yang Yantao Chen Zhihao Yuan Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 China School of Electrical and Electronic Engineering Tianjin Key Laboratory of Film Electronic & Communication Devices Tianjin University of Technology Tianjin 300384 China

Transition metal phosphides (TMPs) are promising candidates for noble metal free electrocatalysts in water splitting applicati ons. In this work, we prese nt the facile syn thesis of nickel cobalt phosphide electrocatalyst with three-dime nsional nano structure (3D-NiCoP) on the nickel foam, via hydrothermal reaction and phosphorization. The as-prepared electrocatalyst exhibits an excellent activity for hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes, with small overpotentials to drive 10 mA/cm^2 (80 mV for 0.5 M H2SO4, 105 mV for 1 M KOH), small Tafel slopes (37 mV/dec for 0.5 M H2SO4, 79 mV/dec for 1 M KOH), and satisfying durability in long-term electrolysis. 3D-NiCoP also shows a superior HER activity compared to single metal phosphide, such as cobalt phosphide and nickel phosphide. The outstanding performa nee for HER suggests the great pote ntial of 3D-NiCoP as a highly efficient electrocatalyst for water splitting technology.

关键词： nickel cobalt phosphide water splitting hydrogen evolution reaction electrocatalyst

Enhanced performance triboelectric nanogenerator based on porous structure C/MnO_(2)nanocomposite for energy harvesting

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Nano Research 2022年第8期15卷 7163-7171页

作者： Honghao Zhang Ping Zhang Pengfei Li Lu Deng Weikang Zhang Baocheng Liu zhengchun yang School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China School of Integrated Circuit Science and Engineering Adv.Mater.and Printed Electronics CenterTianjin Key Laboratory of Film Electronic&Communication DevicesTianjin University of TechnologyTianjin 300384China

Triboelectric nanogenerator(TENG)can realize a variety of mechanical energy collections in the environment,which has great potential in the field of wearable ***,many TENGs could rarely be satisfactory to wearable electronics promotion because of their expensive raw materials and complex manufacturing *** this study,a type of porous structure carbon powder/manganese dioxide(C/MnO_(2))nanocomposite is *** material adopts low-cost,high-yield carbon powder,can be prepared in one step through a simple,economical,and environmentally friendly hydrothermal preparation process,and has high economic *** power generation performance was obtained by modulating the charge trapping ability and storage capacity of polydimethylsiloxane@C/MnO_(2)(PDMS@C/MnO_(2))film based on variations in the weight-loading of C/MnO_(2).The maximum output voltage of carbon powder/manganese dioxide TENG(CM-TENG)is 63 V,which is 2.1 times that of PDMS-TENG and 1.86 times that of carbon powder TENG(C-TENG)and can easily light up 53 ***,CM-TENG can convert biological motion energy into electrical signals to detect human hand *** CM-TENG self-powered system can successfully drive various microelectronic devices,such as electronic watches,liquid crystal displays(LCDs),and *** study provides a reliable,low-cost,high-performance,and widely applicable electronic system that shows great potential in future fields such as wearable devices and micro-sensing systems.

关键词： porous structure carbon powder/manganese dioxide(C/MnO_(2)) nanocomposite triboelectric nanogenerator widely applicable microelectronic devices

Flexible micro-supercapacitors fabricated from MnO2 nanosheet/graphene composites with black phosphorus additive

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Progress in Natural Science:Materials International 2022年第1期32卷 10-19页

作者： Baocheng Liu Zongsheng Cao zhengchun yang Wen Qi Jie He Peng Pan Huayi Li Ping Zhang School of Electrical and Electronic Engineering Advanced Materials and Printed Electronics Center Tianjin Key Laboratory of Film Electronic & Communication DevicesTianjin University of Technology CISRI HIPEX Technology Co LTD China Iron & Steel Research Institute Group School of Electrical and Information Engineering Tianjin University

Supercapacitors are widely used for powering flexible/wearable electronics owing to their excellent charge storage capabilities. In this study, MnO2nanosheets were grown on the surface of graphene using a simple water bath method to prepare graphene/MnO2composites for fabricating supercapacitors. In addition, two-dimensional black phosphorus was introduced as an additive into the electronic ink based on the as-prepared graphene/MnO2composites. The characterization and electrochemical analyses results showed that adding black phosphorus considerably improved the capacitive performance of the material, yielding a high specific capacitance of241.5 Fg-1at 0.1 Ag-1and an impressive rate capability improvement from 52.5% to 80.3%. Then the microsupercapacitor having an area-specific capacitance of 20.15 mF cm-2at a scanning rate of 2 m V s-1was utilized to demonstrate the practical applicability of this material. To further evaluate the practical applicability of this micro-supercapacitor, the micro-supercapacitor was integrated with a flexible thin-film pressure sensor on paper and cloth through screen printing.

关键词： Manganese dioxide nanosheets Graphene Black phosphorus Micro-supercapacitor

Out-of-plane and In-plane piezoelectric behaviors of [Ba(Zr0.2Ti0.8)O3]–0.5(Ba0.7Ca0.3TiO3) thin films

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Progress in Natural Science:Materials International 2017年第6期27卷 664-668页

作者： Zhi Tao Fei Che Yemei Han Fang Wang zhengchun yang Wen Qi Ying Wu Kailiang Zhang School of Electronic and Information Engineering Tianjin Key Laboratory of Film Electronic & Communication Devices Tianjin University of Technology Beijing Key Laboratory of Energy Nanomaterials Advance Technology & Materials Co Ltd. China Iron & Steel Research Institute Group

The piezoelectric properties of [Ba(Zr;Ti;)O;]–0.5(Ba;Ca;TiO;)（abbreviated as BZT-0.5BCT） thin films deposited on Pt/Ti/SiO;/Si substrates are reported in the present investigation. The effect of the distances between the target and substrate（d） on the morphology and out-of-plane piezoelectric properties was *** experimental results showed that the ferroelectric domains size was dependent on the distance between the substrate and target and the ferroelectric domain growth was constrained by the grains. The samples exhibited well-defined out-of-plane butterfly loops and hysteresis loops and the one with d of 6.5 cm possessed the optimal ferroelectric properties and it exhibited good in-plane piezoelectric properties.

关键词： Piezoelectrics BZT-BCT Ferroelectric domains Out-of-plane In-plane

RESEARCH ON THE DYNAMIC PROPERTY OF PIEZOELECTRIC MICRO DISPLACEMENT ACTUATOR FOR BORING ERROR COMPENSATION

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Chinese Journal of Mechanical Engineering 2002年第2期15卷 97-102页

作者： Du zhengchun yang Jianguo Yao ZhenqiangSchool of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, ChinaYan JingpingSoutheast University Mechanical Engineering Shanghai Jiaotong University 上海 200030 Southeast University

The dynamic property of piezoelectric micro displacement actuator (PMDA) isanalyzed, especially the mechanical characteristic, lag phase property and hysteresis *** influence factors of static and dynamic mechanical characteristics and the lag phase propertyare analyzed systematically. Three main influence factors of lag phase property are discovered, Withcomparison to mechanical Coulomb friction, a generalized model of nonlinear hysteresis of PMDA isadvanced, based on the essential analysis of nonlinear phenomenon. Finally the application of PMDAin error compensation control system of boring is introduced, A good compensation result isachieved.

关键词： Piezoelectric actuator Dynamic property Lag phase Hysteresis Errorcompensation

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Electrochemical performance of a three-layer electrode based on Bi nanoparticles,multi-walled carbon nanotube composites for simultaneous Hg(Ⅱ)and Cu(Ⅱ)detection

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Chinese Chemical Letters 2020年第10期31卷 2752-2756页

作者： Qiwen Bao Gang Li zhengchun yang Peng Pan Jun Liu Jiayuan Chang Jun Wei Ling Lin School of Precision Instrument and Optoelectronic Engineering the State Key Laboratory of Precision Measuring Technology and InstrumentsTianjin University Tianjin 300072China School of Electrical and Electronic Engineering Tianjin Key Laboratory of Film Electronic&Communication DevicesAdvanced Materials and Printed Electronics CenterTianjin University of TechnologyTianjin 300384China Agency for Science Technology and Research(A*STAR)Singapore Institute of Manufacturing TechnologySingapore 638075Singapore

Electrochemical analysis is a promising technique for detecting biotoxic and non-biodegradable heavy *** article proposes a novel composite electrode based on a polyaniline(PANi)fra mework doped with bismuth nanoparticle@graphene oxide multi-walled carbon nano tubes(Bi NPs@GO-MWCNTs)for the simultaneous detection of multiple heavy metal *** electrodes are prepared on screenprinted electrodes(SPCEs)using an efficient dispensing *** used a SM200 SX-3 A dispenser to load a laborato ry-specific ink with optimized viscosity and adhesion to draw a pattern on the work *** SPCE was used as substrate to facilitate cost-effective and more convenient real-time detection *** techniques,such as cyclic voltammetry and differential pulse voltammetry,were used to demonstrate the sensing capabilities of the proposed sensor,The sensitivity,limit of detection,and linear range of the PANi-Bi NPs@GO-MWCNT electrode are 2.57×10^(2)μA Lμmol^(-1) cm^-2,0.01 nmol/L,and 0.01 nmol/L-5 mmol/L and 0.15×10^(-1)μALμmol^(-1) cm^-2,0.5 nmol/L,and 0.5 nmol/L-5 mmol/L for mercury ion(Hg(Ⅱ))and copper ion(Cu(Ⅱ))detection,*** addition,the electrode exhibits a good selectivity and repeatability for Hg(Ⅱ)and Cu(Ⅱ)sensing when tested in a complex heavy metal ion *** constructed electrode system exhibits a detection performance superior to similar methods and also increases the types of heavy metal ions that can be ***,the proposed device can be used as an efficient sensor for the detection of multiple heavy metal ions in complex environments.

关键词： Bismuth nanoparticle Multi-walled carbon nanotube Electrochemical sensor Hg(Ⅱ) Cu(Ⅱ)

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Visible-Light Photocatalytic Activity of TiO_(2) Nanorods and Its Application to Degrading Organic Pollutants

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China Petroleum Processing & Petrochemical Technology 2022年第2期24卷 138-146页

作者： He Jie Shi Chaojie yang zhengchun Hou Qiang Zhang Rui Zhu Tianjia Pan Peng Zhang Ping School of Integrated Circuit Science and Engineering Advanced Materials and Printed Electronics CenterTianjin Key Laboratory of Film Electronic&Communication DevicesTianjin University of TechnologyTianjin 300384 Department of Chemical Industry SINOPEC Tianjin CompanyTianjin 300271 Department of Electronics Nankai UniversityTianjin 300350 School of Electrical and Information Engineering and Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin UniversityTianjin 300072

Fluorine-doped tin oxide(FTO)/TiO_(2) seed layer/TiO_(2) nanorods were prepared by ion-beam deposition and hydrothermal *** UV light,the photocurrent density of these nanorods was found to reach 1.39 mA/cm^(2),which was higher than that without the seed layer and nanorod ***,the FTO/TiO_(2) seed layer/TiO_(2) nanorods can also absorb visible light,overcoming a notable problem with standard TiO_(2).The photocurrent density of the FTO/TiO_(2) seed layer/TiO_(2) nanorods was found to reach 0.21 mA/cm^(2) under visible *** high-performance results from the deposition of the TiO_(2) seed layer,which reduces the band gap of TiO_(2).The FTO/TiO_(2) seed layer/TiO_(2) nanorods also exhibited high photodegradation ability for the organic pollutant methylene blue(MB).Within 120 min,77.3%of the MB was found to have been degraded,and the degradation rates remained almost unchanged after four cycles with the same catalyst ***,compared with powdered photocatalysts,the FTO/TiO_(2) seed layer/TiO_(2) nanorod sample is easy to recover,requiring only rinsing with water and natural drying after the reaction.

关键词： TiO_(2)nanorods photocatalysis visible light photodegradation

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Perpendicular magnetic clusters with configurable domain structures via dipole-dipole interactions

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Nano Research 2015年第11期8卷 3639-3650页

作者： Weimin Li Seng Kai Wong Tun Seng Herng Lee Koon Yap Cheow Hin Sim zhengchun yang Yunjie Chen Jianzhong Shi Guchang Han Junmin Xue Jun Ding Department of Materials Science and Engineering National University of Singapore BLK EA#03-09 9 Engineering Drive 1 117575 Singapore Data Storage Institute Agency for Science Technology and Research (A'STAR) DSl Building 5 Engineering Drive 1 117608 Singapore

Magnetic single-domain islands based on in-plane anisotropy （usually, shape anisotropy） and their dipole-dipole interactions have been investigated extensively in recent years. This has been driven by potential applications in magnetic recording, spintronics, magneto-biology, etc. Here, we propose a concept of out- of-plane magnetic dusters with configurable domain structures （multi-flux states） via dipole-dipole interactions. Their flux stages can be switched through an external magnetic field. The concept has been successfully demonstrated by patterned [Co/Pd] islands. A [Co/Pd] multilayer exhibits a large perpendicular anisotropy, a strong physical separation, and uniform intrinsic properties after being patterned into individual islands by electron beam lithography. A three- island cluster with six stable flux states has been realized by optimizing island size, thickness, gap, anisotropy, saturation magnetization, etc. Using [Co/Pd] multilayers, we have optimized the island structure by tuning magnetic properties （saturation magnetization and perpendicular anisotropy） using Landau-Liftshitz- Gilbert （LLG） simulation/calculation. Potential applications have been proposed, including a flexi-programmable logic device with AND, OR, NAND, and NOR functionalities and a magnetic domino, which can propagate magnetic current as far as 1 μm down from the surface via vertical dipole-dipole interactions.

关键词： perpendicular anisotropy dipole-dipole interaction multistate magnetic recording logic device magnetic domino

自动乳腺超声联合手持超声与磁共振成像诊断乳腺疾病

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中国超声医学杂志 2022年第3期38卷 256-259页

作者：王聪杨正春重庆市妇幼保健院超声科

目的本研究对比自动乳腺超声诊断系统(ABUS)联合手持超声(HHUS)与磁共振成像(MRI)增强扫描(DCE)在乳腺疾病诊断中的价值。方法选取乳腺病变患者213例，对患者实施乳腺X线、ABUS、HHUS检查及MRI-DCE检查，以活检病理诊断结果为金标准... 详细信息

目的本研究对比自动乳腺超声诊断系统(ABUS)联合手持超声(HHUS)与磁共振成像(MRI)增强扫描(DCE)在乳腺疾病诊断中的价值。方法选取乳腺病变患者213例，对患者实施乳腺X线、ABUS、HHUS检查及MRI-DCE检查，以活检病理诊断结果为金标准，分别比较X线、ABUS、HHUS、MRI-DCE及ABUS联合HHUS对乳腺病变定性诊断的结果。结果 ABUS联合HHUS、MRI-DCE的灵敏度、特异度、准确率、阳性预测值、阴性预测值均高于ABUS、HHUS(P0.05)。结论 ABUS联合HHUS对乳腺病灶定性诊断具有良好的诊断价值，临床诊断乳腺病变时可优先选择ABUS联合HHUS。

关键词：乳腺癌自动乳腺超声诊断系统手持超声磁共振成像