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Highly Thermo-Conductive three-dimensional graphene Aqueous Medium

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Nano-Micro Letters 2020年第10期12卷 224-235页

作者： Zheng Bo Chongyan Ying Huachao Yang Shenghao Wu Jinyuan Yang Jing Kong Shiling Yang Yanguang Zhou Jianhua Yan Kefa Cen State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringCollege of Energy EngineeringZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215People’s Republic of China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongPeople’s Republic of China

Highly thermo-conductive aqueous medium is a crucial premise to demonstrate high-performance thermal-related *** has the diamond comparable thermal conductivity,while the intrinsic two-dimensional reality will result in strong anisotropic thermal conductivity and wrinkles or even crumples that significantly sacrifices its inherent properties in practical *** strategy to overcome this is to use three-dimensional(3D)architecture of ***,3D graphene structure with covalent-bonding nanofins(3D-GS-CBF)is proposed,which is then used as the filler to demonstrate effective aqueous *** thermal conductivity and thermal conductivity enhancement efficiency of 3D-GS-CBF(0.26 vol%)aqueous medium can be as high as 2.61 W m-1 K-1 and 1300%,respectively,around six times larger than highest value of the existed aqueous ***,3D-GS-CBF can be stable in the solution even after 6 months,addressing the instability issues of conventional graphene networks.A multiscale modeling including non-equilibrium molecular dynamics simulations and heat conduction model is applied to interpret experimental results.3D-GS-CBF aqueous medium can largely improve the solar vapor evaporation rate(by 1.5 times)that are even comparable to the interfacial heating system;meanwhile,its cooling performance is also superior to commercial coolant in thermal management applications.

关键词： three-dimensional graphene Thermo-conductive aqueous medium Multiscale modeling Solar thermal conversion Practical thermal management

Synthesis and electrochemical properties of three-dimensional graphene/polyaniline composites for supercapacitor electrode materials

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Chinese Physics B 2015年第4期24卷 366-371页

作者：赵文何大伟王永生杜翔忻昊 Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic TechnologyBeijing Jiaotong University

To improve the specific capacitance and rate capability of electrode material for supercapacitors, a three-dimensional graphene/polyaniline （3DGN/PANI） composite is prepared via in situ polymerization on GN hydrogel. PANI grows on the GN surface as a thin film, and its content in the composite is controlled by the concentration of the reaction monomer. The specific capacitance of the 3DGN/PANI composite containing 10 wt% PANI reaches 322.8 F.g-1 at a current density of 1 A.g-1, nearly twice as large as that of the pure 3DGN （162.8 F.g-1）. The capacitance of the composite is 307.9 F.g-1 at 30 A.g-1 （maintaining 95.4%）, and 89% retention after 500 cycles. This study demonstrates the exciting potential of 3DGN/PANI with high capacitance, excellent rate capability and long cycling life for supercapacitors.

关键词： graphene/polyaniline composites electrochemical property three-dimensional graphene

Design and construction of three-dimensional graphene/conducting polymer for supercapacitors

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Chinese Chemical Letters 2016年第8期27卷 1437-1444,1471页

作者： Meng Wang Yu-Xi Xu School of Nuclear Science and Technology University of South China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan University

three-dimensional graphene/conducting polymer（3DGCP） composites have received significant attention in recent years due to their unique structures and promising applications in energy *** the structural diversity of graphene and π-functional conducting polymers via rich chemical routes,a number of 3DGCP composites with novel structures and attractive performance have been ***,the hierarchical porosity,the interactions between graphene and conducting polymers as well as the their synergetic effects within 3DGCP composites can be well combined and elaborated by various synthetic methods,which made 3DGCP composites show unique electrochemical properties and significantly improved performance in energy storage fields compared to other graphenebased *** this short review,we present recent advances in 3DGCP composites in developing effective strategies to prepare 3DGCP composites and exploring them as a unique platform for supercapacitors with unprecedented *** challenges and future opportunities are also discussed for promotion of further study.

关键词： three-dimensional graphene Conducting polymer Composite Synthetic method Supercapacitor

Electrochemical DNA sensor with three-dimensional graphene modified electrode for staphylococcus aureus nuc gene sequence

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Electrochemical DNA sensor with three-dimensional graphene m...

Preconcentration of chlorophenols in water samples using threedimensional graphene-based magnetic nanocomposite as absorbent

第十届全国化学生物学学术会议

作者： Xueliang Niu Wei Chen Xiuli Wang Wei Sun Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringHainan Normal University

Electrochemical DNA sensing for nuc ssDNA sequence originated from Staphylococcus aureus was reported with an electrodeposited three-dimensional(3 D) graphene(GR) modified electrode. Probe ssDNA sequence was electrostatic absorbed onto 3 DGR modified electrode by a potentistatic method. The porous structure with big surface area of 3 DGR greatly enhanced the immobilized amount of probe ssDNA sequence on working electrode interface, which was benefit for the further reaction with target ssDNA sequence. By using methylene blue(MB) as the electrochemical indicator, the reduction peak current of MB was used for the identification of the hybridization reaction. At the selected conditions differential pulse voltammetric current of MB had an excellent linear relationship to nuc sequences concentration from 1.0×10-12 to 1.0×10-6 mol/L and the detection limit was 3.33×10 mol/L(3σ). The fabricated DNA sensor was successful applied to analyze PCR product of pork sample, which showed the potential application in the routine analysis.

关键词： Carbon ionic liquid electrode three-dimensional graphene Electrostatic adsorption Electrochemical DNA biosensor

来源： cnki会议评论

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cnki会议

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Chinese Chemical Letters 2014年第8期25卷 1185-1189页

作者： Xing-Li Liu Chun Wang Qiu-Hua Wu Zhi Wang College of Science Agricultural University of Hebei

In this paper, a novel magnetic solid-phase extraction method using three-dimensional graphene-based magnetic nanocomposite as adsorbent for the preconcentration of several chlorophenols from water samples prior to high-performance liquid chromatography analysis was developed. Various experimental parameters were investigated. Under the optimum conditions, the enrichment factors of the method were in the range of 186–312, and the limit of detection（S/N = 3） was 0.10 ng/mL. The recoveries of the method were in the range between 85.1% and 101.2%. The developed method has been successfully applied to the determination of chlorophenols in environmental water samples.

关键词： three-dimensional graphene Magnetic adsorbent High performance liquid chromatography Chlorophenols Water samples

graphene foam resonators:Fabrication and characterization

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Nano Research 2022年第1期15卷 225-229页

作者： Yahav Ben-Shimon Siva KReddy Assaf Ya'akobovitz Department of Mechanical Engineering Faculty of Engineering SciencesBen-Gurion University of the NegevIsrael

three-dimensional graphene foams(GFs)benefit from a large surface area and unique physical *** present here the first-ever miniaturized GF-based *** developed a simple yet reliable fabrication process,in which GFs are synthesized and assembled on a cavity to form suspended GF *** electrostatically excited these devices and analyzed their resonance and ring-down *** observed significant energy dissipation,as the quality factor of the devices was in the order of several ***,we investigated the influence of temperature on the operation of the devices and found that high temperatures mechanically soften the resonators but also considerably enhance energy ***,our devices demonstrated a mode-coupling of a resonance mode and a mode having twice its ***,this work paves the way toward the development of novel GF resonators that could be integrated into future devices,such as GF-based nano-electromechanical sensors,electrical circuits,and oscillators.

关键词： energy dissipation graphene foam micro/nano electromechanical systems three-dimensional graphene resonators

A 3D MIL-101@rGO composite as catalyst for efficient conversion of straw cellulose into valuable organic acid

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Chinese Chemical Letters 2022年第5期33卷 2573-2578页

作者： Yuan Su Mengchu Lu Ruidian Su Weizhi Zhou Xing Xu Qian Li School of Mathematic and Quantitative Economics Shandong University of Finance and EconomicsJi’nan 250014China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao 266200China School of Civil Engineering Shandong UniversityJi’nan 250100China

Efficient conversion of straw cellulose to chemicals or fuels is an attracting topic today for the utiliza-tion of biomass to substitute for fossil *** development of catalysts is of vital *** this work,a composite catalyst metal-organic frameworks(MOFs)immobilized on three-dimensional reduced graphene oxide(3D-rGO)were synthesized by in situ growth of the MIL-101(Cr)within the 3D-rGO *** supporting of 3D-rGO guaranteed the dispersion and acid site density of MIL-101(Cr).The MIL-101(Cr)@3D-rGO nanocomposite possesses excellent catalytic activity,stability,recyclability and is an idea catalyst for the efficient degradation of straw cellulose into formic acid(FA),acetic acid(AA)and oxalic acid(OA).A maximum FA conversion rates of 95.36%was obtained by using MIL-101(Cr)@3D-rGO(1:1)as catalyst and hydrothermal reaction at mild conditions of 200°C for 1h in alkaline aqueous *** MIL-101(Cr)@3D-rGO nanocomposite can be reused with high catalytic activity without any collapse of structure or leaching of chromium.

关键词： Straw cellulose MIL-101(Cr) three-dimensional graphene Catalystic conversion Organic acid