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CVD growth of graphene on copper-plated scrap steel without external carbon source

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Nano Research 2023年第10期16卷 12263-12269页

作者： Tianyi Qi Qingguo Shao Hao Qi Jianhua Xiao Yuming Zhang Yang Wang Xin Jin Yanli Chen Dan Li xiaobei zang Ning Cao School of Materials Science and Engineering State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China College of Chemistry and Chemical Engineering State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Qingdao Fengdong Heat Treatment Company Qingdao 266108China

Chemical vapor deposition(CVD)using gaseous hydrocarbon sources has shown great promise for large-scale graphene growth,but high growth temperatures(typically 1000℃)require sophisticated and expensive equipment,which increases graphene production costs.Here,we demonstrate a new approach to produce graphene at low cost from scrap steel sheets treated by thermal evaporation of copper plating,which is a derivative of traditional CVD technology.Without additional carbon sources,graphene film was successfully prepared on copper-coated scrap steel sheets at 820℃.The resulting graphene has few defects and uniform morphology,comparable to CVD graphene grown at 1000℃.Finally,the obtained graphene film is used in combination with an interdigital electrode to detect NO_(2)successfully,showing excellent performance.This technology expands the application of graphene in the manufacture of gas sensing devices and is compatible with traditional microelectronics technology.

关键词： graphene reuse of scrap steel C atoms activation H_(2)etching copper catalysis gas sensing

Tailoring Bi_(2)Te_(3) edge with semiconductor and metal properties under electron beam irradiation

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Nano Research 2022年第5期15卷 4710-4716页

作者： Ning Cao Peng Liu Jialiang Pan Liheng Liang Kunpeng Cai Qingguo Shao Hongwei Zhu xiaobei zang School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

In pursuit of miniaturization in the semiconductor industry,two-dimensional(2D)materials are used to fabricate new electronic devices.The topological insulator(TI)material bismuth telluride(Bi_(2)Te_(3)),as an emerging 2D material,has potential applications in electronic and spintronic devices due to its unique electrical properties.It is well known that the surface-to-volume ratio increases as the thickness of the material decreases,resulting in a more prominent edge effect.Therefore,for a single-layer Bi_(2)Te_(3),the atomic structure of the edge plays a crucial role in its electrical properties.Here,combining first-principles calculations and in situ transmission electron microscopy(TEM)experimental studies,we report that there are two types of edge structures in single-layer Bi2Te3:semiconducting flat edges and metallic zigzag edges.The dynamic evolution process of the edge structure with atomic resolution shows that the proportions of these two edges change with continuous electron beam irradiation.Our findings demonstrate the viability to use electron beam as an effective tool to precisely tailor the edge of Bi_(2)Te_(3) with desired properties,which paves the way for implementation of single-layer Bi2Te3 in electronics and spintronics.

关键词： Bi_(2)Te_(3)edge electron beam irradiation in situ transmission electron microscopy(TEM) atomic precision

Facile and secure synthesis of porous partially fluorinated graphene employing weakly coordinating anion for enhanced high-performance symmetric supercapacitor

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Journal of Materiomics 2022年第1期8卷 113-122页

作者： Ning Cao Teng Wang Rabah Boukherroub Yinghui Cai Yijiang Qin Fashun Li Peng Liu Qingguo Shao Mingle Liu xiaobei zang School of Materials Science and Engineering China University of Petroleum(East China)Qingdao266580China Univ.Lille CNRSCentrale LilleUniv.Polytechnique Hauts-de-FranceUMR 8520-IEMNF-59000LilleFrance Chambroad Holding Group Economic Development ZoneBinzhou256500China China Petroleum Pipeline Engineering Co. LtdAsia Pacific BranchChina Petroleum Pipeline Engineering Co.Ltd.Development ZoneLangfang065000China

In this paper,porous partially fluorinated graphene(PFG)for supercapacitors(SCs)was fabricated by a mild and secure one-pot hydrothermal method utilizing weakly coordinating anion BF_(4)^(-) as the fluorine source.The hydrolysis rate of sodium fluoroborate was adjusted by controlling the reaction temperature and PFG containing semi-ionic C-F bonds was obtained,where the content of semi-ionic C-F bonds in PFG can be easily regulated.The final experimental results show that the incorporation of fluorine not only modulates the electrochemical properties of the material,but also creates abundant pores.When assembled in a symmetric supercapacitor,the PFG shows a high specific capacitance of 269.7 F g^(-1) at 1 A g^(-1) and a superior rate capability with 89.3%capacitance retained,as the current density is increased from 1 A g^(-1)even to 20 A g^(-1).Furthermore,the resultant energy density for PFG is 9.4 Wh kg^(-1) at a power density of 250.0 W kg^(-1)(1 A g^(-1)).All these results confirm that as-prepared partially fluorinated graphene is appropriate for the application in SCs and mass production.

关键词： Partially fluorinated graphene Weakly coordinating anion Semi-ionic C F bonds Supercapacitors

Enhancing Capacitance Performance of Ti3C2Tx MXene as Electrode Materials of Supercapacitor: From Controlled Preparation to Composite Structure Construction

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Nano-Micro Letters 2020年第6期12卷 152-175页

作者： xiaobei zang Jiali Wang Yijiang Qin Teng Wang Chengpeng He Qingguo Shao Hongwei Zhu Ning Cao School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580People’s Republic of China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084People’s Republic of China

Ti3C2Tx,a novel two-dimensional layer material,is widely used as electrode materials of supercapacitor due to its good metal conductivity,redox reaction active surface,and so on.However,there are many challenges to be addressed which impede Ti3C2Tx obtaining the ideal specific capacitance,such as restacking,re-crushing,and oxidation of titanium.Recently,many advances have been proposed to enhance capacitance performance of Ti3C2Tx.In this review,recent strategies for improving specific capacitance are summarized and compared,for example,film formation,surface modification,and composite method.Furthermore,in order to comprehend the mechanism of those efforts,this review analyzes the energy storage performance in different electrolytes and influencing factors.This review is expected to predict redouble research direction of Ti3C2Tx materials in supercapacitors.

关键词： Ti3C2Tx MXene Capacitance performance Storage mechanism Electrode materials Supercapacitor

Enhanced zinc storage performance of mixed valent manganese oxide for flexible coaxial fiber zinc-ion battery by limited reduction control

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Journal of Materials Science & Technology 2021年第15期74卷 52-59页

作者： xiaobei zang Li Lingtong Jiaxin Meng Lijia Liu Yuanyuan Pan Qingguo Shao Ning Cao School of Materials Science and Engineering.China University of Petroleum(East China) Qingdao266580China Department of Chemistry University of Western Ontario1151 Richmond StreetLondonOntarioN6A5B7Canada State Key Laboratory of Heavy Oil Processing Institute of New EnergyCollege of Chemical EngineeringChina University of Petroleum(East China)Qingdao266580China

While manganese-based cathodes have been intensively studied for zinc-ion batteries(ZIBs),the limited rate capability and cycle life have always been a difficult problem to be solved.Here,we report a mixed valent manganese oxide(MnOx)cathode with superior electrochemical performance,which exhibits a high specific capacity of 450 mA h/g at 0.2 C and a satisfactory specific capacity of 158.3 mA h/g at a high rate of 5 C.The mixed cathode system reduces the charge transfer resistance,and show good surface stability and adsorption properties,so it is beneficial for the storage of Zn^(2+).Meanwhile,coaxial fiber ZIBs(CFZIBs)with splendid flexibility are assembled utilizing the elaborately prepared cathode material.The CFZIBs achieve a reversible capacity of 255.8 m A h/g and the capacity retention rate is as high as 80%after 1000 bending deformations.This study provides new opportunities for designing ZIBs with high performance and high flexibility.

关键词： Mixed valent manganese oxide Limited reduction Storage mechanism Flexible zinc-ion battery Coaxial fiber structure

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推进剂管路系统深低温垫片密封性能数值分析

清华大学学报（自然科学版） 2024年第3期64卷 578-590页

作者：蔡鲲鹏臧晓蓓陈升山郭飞中国石油大学(华东)重质油国家重点实验室青岛266580 清华大学高端装备界面科学与技术全国重点实验室北京100084

为解决运载火箭在常规和极端服役工况下的密封泄漏问题,该文提出一种可预测深低温接管系统接头连接密封性能的方法。首先借助有限元仿真方法分析求解接触界面力学的宏观接触压力分布;之后利用真实粗糙表面形貌,结合接触压力分布,计算微... 详细信息

为解决运载火箭在常规和极端服役工况下的密封泄漏问题,该文提出一种可预测深低温接管系统接头连接密封性能的方法。首先借助有限元仿真方法分析求解接触界面力学的宏观接触压力分布;之后利用真实粗糙表面形貌,结合接触压力分布,计算微观接触形貌,进而求解泄漏通道的平均高度;考虑介质流动特性,采用栅格模型构建泄漏率量化计算模型,最终得到作为评判密封性能标准的泄漏率。基于数值计算方法,从理论上研究了不同温度、载荷和介质压力等参数对垫片密封性能的影响规律;同时通过简化接头-接管系统结构,设计了一种可重复使用且操作方便的模拟工装实验结构,进而开展了不同载荷下的垫片密封泄漏率测试,结果表明:泄漏率的仿真值和实验值误差在一个数量级内,吻合度较高。该研究对接头-接管垫片密封结构的设计优化及工程应用具有一定的指导意义。

关键词：垫片密封栅格泄漏模型深低温泄漏率量化

Three-dimensional porous graphene sponges assembled with the combination of surfactant and freeze-drying

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Nano Research 2014年第10期7卷 1477-1487页

作者： Rujing Zhang Yachang Cao Peixu Li xiaobei zang Pengzhan Sun Kunlin wang Minlin Zhong Jinquan Wei Dehai Wu Feiyu Kang Hongwei Zhu School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Materials Processing Technology of MOE Tsinghua University Beijing 100084 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China Advanced Materials Institute Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China

与表面活化剂和 freeze-drying 的联合，我们开发了二种 graphene 多孔的结构。在一方面，把肥皂水泡的泡沫用作模板，有富有的层次毛孔的三维的多孔的 graphene 海绵被综合了。材料的毛孔包含长度规模的三个层次，包括毫米，测微计和... 详细信息

与表面活化剂和 freeze-drying 的联合，我们开发了二种 graphene 多孔的结构。在一方面，把肥皂水泡的泡沫用作模板，有富有的层次毛孔的三维的多孔的 graphene 海绵被综合了。材料的毛孔包含长度规模的三个层次，包括毫米，测微计和纳米。结构能被改变结冰媒介调节，调整激动人心的率或增加功能的添加剂。由 graphene 氧化物 / 表面活化剂暂停的直接 freeze-drying，在另一方面，有方向性地排列的毛孔的一个多孔的框架被准备。表面活化剂给 graphene 氧化物表的更好的分散，导致一个高特定的表面区域。两个获得的材料展出优秀吸收能力和好压缩性能，提供大量可能的应用程序，例如吸收剂，存储媒介，和搬运人。

关键词：表面活性剂冷冻干燥多孔石墨海绵三维功能性添加剂调节结构氧化石墨

Ultra-sensitive graphene strain sensor for sound signal acquisition and recognition

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Nano Research 2015年第5期8卷 1627-1636页

作者： Yan Wang Tingting Yang Junchao Lao Rujing Zhang Yangyang Zhang Miao Zhu Xiao Li xiaobei zang Kunlin Wang Wenjian YU Hu Jin Li Wang Hongwei Zhu Department of Physics and Institute for Advanced Study Nanchang University Nanchang 330031 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Key Laboratory ot Materials Processing Technology of MOE Tsinghua University Beijing 100084 China Department of ComputerScience and Technology Tsinghua University Beijing 100084 China 2D Carbon Graphene Material Co. Ltd. Changzhou 213149 China

为健全信号获得和识别的一个便携、高精确的传感器从编织的特殊设计的 graphene 的薄电影被制作织物(GWF ) 。在被拉长之上，随机的裂缝的高密度出现在网络，它减少当前的小径，从而增加电阻。因此，这部电影能对人的喉咙作为一个紧张... 详细信息

为健全信号获得和识别的一个便携、高精确的传感器从编织的特殊设计的 graphene 的薄电影被制作织物(GWF ) 。在被拉长之上，随机的裂缝的高密度出现在网络，它减少当前的小径，从而增加电阻。因此，这部电影能对人的喉咙作为一个紧张传感器起作用以便测量通过肌肉运动，一个声音是否被生产的讲话。超离频敏感允许由提取声波的签名特征的快速、低频率的讲话采样的实现。在这研究， 26 封英语信，典型汉字和音调的代表性的信号，甚至短语和句子被测试，揭示在电阻的明显、典型的变化。而且， graphene 传感器的电阻变化与预告录下的声音完美地反应了。由把人工智能与数字信号处理相结合，我们期望以后，这个 graphene 传感器将能成功地达成复杂声学的系统和听觉的数据的大数量。

关键词：应变传感器声音信号信号采集石墨识别超灵敏数字信号处理英文字母

Intrinsic-trap-regulating growth of clean graphene on high-entropy alloy substrate

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Nano Research 2022年第5期15卷 4717-4723页

作者： Xiaofei Hu Jiongzhao Li Zhe Wang Xudong Qian Chenqi Zhu Xiaogang Peng Key Laboratory of Excited-State Materials of Zhejiang Province and Department of Chemistry Zhejiang UniversityHangzhou 310027China

A facile way to grow few-layer graphene on high-entropy alloy sheets is presented in this work.We systematically investigate the growth mechanism of graphene using the unique properties of FeCoNiCu_(0.25)high-entropy alloys.The intrinsic-trap-regulating growth mechanism derives from the synergistic effect of the multi-metal atoms and sluggish diffusion of high-entropy alloy.As a result,as-obtained few-layer of graphene has the characteristics of wide coverage,large size,good continuity,and high crystallinity with less amorphous carbon and extra wrinkles.Factors such as the Cu content,annealing time,growth temperature,growth time,carbon source flow rate,hydrogen flow rate and heat treatment method play a key role in the growth of high-quality graphene,and the best growth parameters have been explored.Besides,increasing alloy entropy is found to be responsible for the formation of high-quality graphene.

关键词： high-entropyalloys graphene chemical vapordeposition