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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 ***,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 *** 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 *** 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 *** 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 *** is well known that the surface-to-volume ratio increases as the thickness of the material decreases,resulting in a more prominent edge ***,for a single-layer Bi_(2)Te_(3),the atomic structure of the edge plays a crucial role in its electrical ***,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 *** dynamic evolution process of the edge structure with atomic resolution shows that the proportions of these two edges change with continuous electron beam *** 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 *** 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 *** final experimental results show that the incorporation of fluorine not only modulates the electrochemical properties of the material,but also creates abundant *** 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

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 ***,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 *** 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 *** 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 *** 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

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 ***,there are many challenges to be addressed which impede Ti3C2Tx obtaining the ideal specific capacitance,such as restacking,re-crushing,and oxidation of ***,many advances have been proposed to enhance capacitance performance of *** this review,recent strategies for improving specific capacitance are summarized and compared,for example,film formation,surface modification,and composite ***,in order to comprehend the mechanism of those efforts,this review analyzes the energy storage performance in different electrolytes and influencing *** 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

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 *** systematically investigate the growth mechanism of graphene using the unique properties of FeCoNiCu_(0.25)high-entropy *** intrinsic-trap-regulating growth mechanism derives from the synergistic effect of the multi-metal atoms and sluggish diffusion of high-entropy *** 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 *** 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 ***,increasing alloy entropy is found to be responsible for the formation of high-quality graphene.

关键词： high-entropyalloys graphene chemical vapordeposition

Robust superhydrophobic polyurethane sponge functionalized with perfluorinated graphene oxide for efficient immiscible oil/water mixture, stable emulsion separation and crude oil dehydration

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Science China(Technological Sciences) 2019年第9期62卷 1585-1595页

作者： CAO Ning GUO JingYu BOUKHERROUB Rabah shao qingguo ZANG XiaoBei LI Jin LIN XueQiang JU Hong LIU EnYang ZHOU ChaoFan LI HuiPing Key Laboratory of Unconventional Oil & Gas Development Ministry of EducationChina University of Petroleum (East China)Qingdao 266580China School of Materials Science and Engineering China University of Petroleum (East China)Qingdao 266580China Univ. Lille CNRSCentrale LilleISENUniv. ValenciennesUMR 8520IEMNLilleFrance School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

In recent years, graphene oxide(GO), prepared by the modified Hummers’ method, and its derivatives have become a focus of research owing to their outstanding physical and chemical properties and low cost. Drawing inspiration from the mussel protein,a facile and environmentally-friendly method was employed to fabricate superhydrophobic/superoleophilic reduced graphene oxide(rGO) derivative. The preparation comprises two steps: coating GO nanosheets with polydopamine(PDA) and subsequent reaction with 1H,1H,2H,2H-perfluorodecanethiol. Due to the excellent adhesive ability of PDA, the resulting f PDA modified rGO nanosheets(rGO-f PDA) were firmly immobilized onto polyurethane(PU) sponge skeleton by a simple drop-coating method. The as-prepared rGO-f PDA functionalized sponge exhibited superhydrophobic behavior with a water contact angle of 162°±2°, high organic adsorption capacity, recyclability and stable oil/water separation behavior under different acidic/alkaline conditions. Due to its facile fabrication technique and outstanding properties, the superhydrophobic-superoleophilic PU-rGOf PDA sponge holds great promise as an oil adsorbent for cleaning up large-scale pollution of oil and organic solvents, and dehydrating crude oil.

关键词： graphene oxide superhydrophobic sponge adsorption oil/water separation emulsion

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三维多孔石墨烯的制备及其电化学性能研究

半导体光电 2020年第6期41卷 855-859页

作者：李建勇邵庆国中国广核新能源控股有限公司上海分公司上海200241 中国石油大学(华东)材料科学与工程学院山东青岛266580

电极材料的孔径结构、尺寸、类型直接影响电极材料的电化学性能。文章利用水热反应与硝酸蒸汽处理两步法制备了三维多孔石墨烯材料,并通过控制硝酸蒸汽处理时间,研究其对电极材料电化学特性的影响。通过扫描电镜、透射电镜、拉曼光谱、... 详细信息

电极材料的孔径结构、尺寸、类型直接影响电极材料的电化学性能。文章利用水热反应与硝酸蒸汽处理两步法制备了三维多孔石墨烯材料,并通过控制硝酸蒸汽处理时间,研究其对电极材料电化学特性的影响。通过扫描电镜、透射电镜、拉曼光谱、X射线衍射等多种测试方法对得到的三维多孔石墨烯进行表征,并利用三电极测试方法,通过循环伏安、恒流充放电和电化学阻抗等电化学测试方法研究其电化学性能。结果表明,所制备的三维多孔石墨烯具有微孔与纳米孔相结合的三维结构,两者的协同作用使得三维多孔石墨烯表现出优异的电化学性能,在1A/g的电流密度下,比电容最高可达191.5F/g。

关键词：石墨烯三维多孔电化学性能超级电容器能源材料

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科学地搭建“中部崛起”的政策平台

科技进步与对策 2006年第1期23卷 13-15页

作者：陈淑兰邵庆国河南教育学院河南郑州450000 开封市科学技术开发交流中心河南开封475002

从人均GDP、投资增长速度、人均可支配收入3组数据实证了中部塌陷的事实,阐述了中部6省打造城市圈和经济圈的基本思路,提出了根据政治氛围、区位优势和资源优势、产业布局和区域经济发展战略等制定“中部崛起”政策的基础,并根据中部的... 详细信息

从人均GDP、投资增长速度、人均可支配收入3组数据实证了中部塌陷的事实,阐述了中部6省打造城市圈和经济圈的基本思路,提出了根据政治氛围、区位优势和资源优势、产业布局和区域经济发展战略等制定“中部崛起”政策的基础,并根据中部的发展和实际,科学地搭建“中部崛起”的政策平台。

关键词：中部崛起政策平台政策