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臭氧-CNTs预沉积耦合方法缓解膜污染研究
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作者 郭瑾 曾嘉 +4 位作者 魏娜 王宇飞 吴曜辰 刘秋杉 刘国涵 《北京工业大学学报》 CAS CSCD 北大核心 2024年第12期1486-1500,共15页
以腐殖酸(humic acid,HA)和海藻酸钠(sodium alginate,SA)作为模型污染物,考察了臭氧预氧化和碳纳米管(carbon nanotubes,CNTs)预沉积联合技术对膜污染形成过程和形成规律的影响。通过测定HA和SA物化特性的变化,结合膜滤过程中比通量变... 以腐殖酸(humic acid,HA)和海藻酸钠(sodium alginate,SA)作为模型污染物,考察了臭氧预氧化和碳纳米管(carbon nanotubes,CNTs)预沉积联合技术对膜污染形成过程和形成规律的影响。通过测定HA和SA物化特性的变化,结合膜滤过程中比通量变化,辅以Hermia模型和传统滤饼过滤模型,分析了臭氧预氧化和CNTs预沉积缓解膜污染的机理。结果表明,经臭氧氧化后,HA和SA的电负性和亲水性增强,且由于发生微絮凝作用,粒径增大。臭氧预氧化对于HA造成的膜污染无明显改善作用,当氧化后HA粒径接近基膜孔径时,膜孔被完全堵塞甚至加重膜污染;臭氧破坏了SA的凝胶特性,大幅缓解了膜表面的滤饼层污染。不同孔径的基膜进行CNTs预沉积后,表面CNTs层可以拦截吸附部分HA和SA分子,从而缓解了HA和SA造成的膜污染。0.45μm PVDF基膜孔径与CNTs层的孔径相差最大,经CNTs预沉积后,在膜表面形成一层致密的过滤层,缓解膜污染的幅度最大。臭氧预氧化与CNTs预沉积联用后,在CNTs沉积量较高的情况下能够缓解HA造成的膜污染,对SA造成的膜污染也起到明显缓解作用,在有效降低膜表面滤饼形成的同时,能够延长膜孔堵塞时间或增加膜孔堵塞到滤饼的过渡阶段时间。 展开更多
关键词 臭氧预氧化 碳纳米管 膜污染 Hermia模型 传统滤饼过滤模型 膜改性
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锂硫电池中CNTs-CNFs夹层对多硫化物的捕获和加速转化机理
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作者 陈磊 袁业辉 +1 位作者 宋瑞 张超 《天津工业大学学报》 CAS 北大核心 2024年第4期44-49,共6页
为有效抑制多硫化锂(LiPSs)的穿梭效应,通过静电纺丝、电化学沉积和化学气相生长技术在碳纳米纤维(CNFs)上垂直生长碳纳米管(CNTs),开发了一种超薄、轻质的多功能三维多层交联碳纳米纤维-碳纳米管(CNTs-CNFs)夹层,并研究CNTs-CNFs对锂... 为有效抑制多硫化锂(LiPSs)的穿梭效应,通过静电纺丝、电化学沉积和化学气相生长技术在碳纳米纤维(CNFs)上垂直生长碳纳米管(CNTs),开发了一种超薄、轻质的多功能三维多层交联碳纳米纤维-碳纳米管(CNTs-CNFs)夹层,并研究CNTs-CNFs对锂硫电池(LSBs)电化学性能的影响。研究结果表明:CNTs-CNFs薄膜优异的导电性和丰富的孔隙结构为LSBs提供了均匀的导电网络和LiPSs的吸附过滤屏障,与无夹层相比,含有CNTs-CNFs夹层的电池具有更优异的容量保持率和循环稳定性,在0.2 C电流密度下具有1296.7 mA·h/g的初始放电比容量,在100次循环后仍能提供了864.7 mA·h/g的放电比容量,容量保持率为66.68%。 展开更多
关键词 多硫化锂(LiPSs) 碳纳米纤维-碳纳米管(cnts-CNFs) 夹层 三维多层交联 锂硫电池(LSBs)
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原位生长的CNTs@MoS_(2)杂化物增强水性膨胀型防火涂料的耐火和隔热性能
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作者 王晓明 朱耿增 +7 位作者 金义杰 贾丹 段海涛 詹胜鹏 杨田 凃杰松 章武林 马利欣 《表面技术》 EI CAS CSCD 北大核心 2024年第4期200-210,共11页
目的设计并研制一种耐火和隔热性能突出的水性膨胀型防火涂料。方法以碳纳米管(CNTs)、四水合钼酸铵、十六烷基溴化铵(CTAB)、硫脲为原料,通过简单的一步水热法原位生长出一种新型的CNTs@MoS_(2)杂化物,并采用FT-IR、XRD、拉曼光谱、SE... 目的设计并研制一种耐火和隔热性能突出的水性膨胀型防火涂料。方法以碳纳米管(CNTs)、四水合钼酸铵、十六烷基溴化铵(CTAB)、硫脲为原料,通过简单的一步水热法原位生长出一种新型的CNTs@MoS_(2)杂化物,并采用FT-IR、XRD、拉曼光谱、SEM等手段对复合杂化物进行表征。再将CNTs@MoS_(2)杂化物作为增效剂分散在水性膨胀型防火涂料(CNTs@MoS_(2)/WES)中,通过大板实验和涂层、炭焦层表面分析评价了涂层的耐火和隔热性能。结果与WES(膨胀倍率为3.90)、CNTs/WES涂层(膨胀倍率为6.04)、MoS_(2)/WES涂层(膨胀倍率为4.59)相比,CNTs@MoS_(2)/WES涂层具有最高的膨胀倍率(8.88)。CNTs@MoS_(2)/WES涂层所涂覆的钢板在燃烧40min后背面温度最低(133.3℃),这充分表明该涂层具有优异的隔热性能。结论制备的CNTs@MoS_(2)杂化物表现出稳定的网络交织结构,有效提高了它在涂料中的分散性能。此外,CNTs@MoS_(2)/WES涂层优异的耐火和隔热性能主要归因于:1)CNTs@MoS_(2)/WES涂层及其炭焦层具有更致密和完整的表面,阻隔了热量的传递;2)CNTs的添加增强了炭焦层的致密性,抑制了膨胀过程中产生的气体泄漏,提升了涂层膨胀倍率;3)MoS_(2)提高了膨胀层强度且促进了炭焦层的形成,减少了裂纹和孔隙的产生。 展开更多
关键词 碳纳米管(cnts) 二硫化钼(MoS_(2)) 协同效应 耐火性能 阻燃机理
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AuNP@Co_(3)(HITP)_(2)-CNT纳米结构的制备及电化学传感性能
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作者 岳王香 戴灿源 +5 位作者 李京谦 胡珂祺 李轶凡 王文达 徐宏妍 胡杰 《微纳电子技术》 CAS 2024年第6期54-61,共8页
利用一步水热法和化学还原法制备了基于金纳米颗粒负载Co_(3)(HITP)_(2)-碳纳米管(AuNP@Co_(3)(HITP)_(2)-CNT)的纳米复合材料。利用X射线光电子能谱仪(XPS)和扫描电子显微镜(SEM)对其表面微观形貌和元素组成进行表征。构建了前列腺特... 利用一步水热法和化学还原法制备了基于金纳米颗粒负载Co_(3)(HITP)_(2)-碳纳米管(AuNP@Co_(3)(HITP)_(2)-CNT)的纳米复合材料。利用X射线光电子能谱仪(XPS)和扫描电子显微镜(SEM)对其表面微观形貌和元素组成进行表征。构建了前列腺特异性抗原(PSA)/牛血清蛋白(BSA)/PSA抗体(Ab)/AuNP@Co_(3)(HITP)_(2)-CNT/玻碳电极(GCE)电化学免疫传感器,并对PSA进行了检测,用循环伏安法(CV)、差分脉冲伏安法(DPV)和电化学阻抗谱(EIS)对其进行电化学性能分析测试。实验结果表明:基于AuNP@Co_(3)(HITP)_(2)-CNT纳米复合材料的电化学免疫传感器对PSA有较宽的检测范围,可达40 fg/mL~100 ng/mL,同时具有较好的特异性、稳定性和可重复性。 展开更多
关键词 电化学免疫传感器 导电金属有机框架(C-MOF) 纳米结构 碳纳米管(cnt) 金纳米颗粒(AuNP) 前列腺特异性抗原(PSA)
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Binary molten salt in situ synthesis of sandwich-structure hybrids of hollowβ-Mo2C nanotubes and N-doped carbon nanosheets for hydrogen evolution reaction
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作者 Tianyu Gong Yang Liu +6 位作者 Kai Cui Jiali Xu Linrui Hou Haowen Xu Ruochen Liu Jianlin Deng Changzhou Yuan 《Carbon Energy》 SCIE EI CAS CSCD 2023年第12期111-124,共14页
Focused exploration of earth-abundant and cost-efficient non-noble metal electrocatalysts with superior hydrogen evolution reaction(HER)performance is very important for large-scale and efficient electrolysis of water... Focused exploration of earth-abundant and cost-efficient non-noble metal electrocatalysts with superior hydrogen evolution reaction(HER)performance is very important for large-scale and efficient electrolysis of water.Herein,a sandwich composite structure(designed as MS-Mo2C@NCNS)ofβ-Mo2C hollow nanotubes(HNT)and N-doped carbon nanosheets(NCNS)is designed and prepared using a binary NaCl–KCl molten salt(MS)strategy for HER.The temperature-dominant Kirkendall formation mechanism is tentatively proposed for such a three-dimensional hierarchical framework.Due to its attractive structure and componential synergism,MS-Mo2C@NCNS exposes more effective active sites,confers robust structural stability,and shows significant electrocatalytic activity/stability in HER,with a current density of 10 mA cm-2 and an overpotential of only 98 mV in 1 M KOH.Density functional theory calculations point to the synergistic effect of Mo2C HNT and NCNS,leading to enhanced electronic transport and suitable adsorption free energies of H*(ΔGH*)on the surface of electroactive Mo2C.More significantly,the MS-assisted synthetic methodology here provides an enormous perspective for the commercial development of highly active non-noble metal electrocatalysts toward efficient hydrogen evolution. 展开更多
关键词 binary molten-salt synthesis hydrogen evolution reaction Mo2C hollow nanotubes N-doped carbon nanosheets sandwich structure
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CNT/乙炔黑复合导电剂对LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)的影响
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作者 曹米红 张骞 +1 位作者 李路成 陈军 《电池》 CAS 北大核心 2024年第3期348-353,共6页
为解决乙炔黑单一导电剂自身团聚的问题,采用含碳纳米管(CNT)的导电浆料进行改性。复合后,直径80~100 nm的球形乙炔黑颗粒均匀分散在直径20 nm的CNT表面,比表面积提高至107.96 m^(2)/g。与乙炔黑导电剂电池相比,CNT/乙炔黑电池的电化学... 为解决乙炔黑单一导电剂自身团聚的问题,采用含碳纳米管(CNT)的导电浆料进行改性。复合后,直径80~100 nm的球形乙炔黑颗粒均匀分散在直径20 nm的CNT表面,比表面积提高至107.96 m^(2)/g。与乙炔黑导电剂电池相比,CNT/乙炔黑电池的电化学阻抗更小、CV曲线面积更大,氧化峰和还原峰的电位差较小(0.19 V),以200 mA/g在2.75~4.20 V循环,首次充放电比容量分别为151.8 mAh/g和155.5 mAh/g,首次库仑效率为97.6%。第200次循环的放电比容量为141.9 mAh/g,容量保持率为92.4%。在5.0 C倍率下,CNT/乙炔黑电池的放电比容量为116.9 mAh/g,倍率性能更好。 展开更多
关键词 锂离子电池 三元正极材料 复合导电剂 乙炔黑 碳纳米管(cnt)
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Ag-doped CNT/HAP nanohybrids in a PLLA bone scaffold show significant antibacterial activity
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作者 Cijun Shuai Xiaoxin Shi +3 位作者 Kai Wang Yulong Gu Feng Yang Pei Feng 《Bio-Design and Manufacturing》 SCIE EI CAS CSCD 2024年第2期105-120,共16页
Bacterial infection is a major problem following bone implant surgery.Moreover,poly-l-lactic acid/carbon nanotube/hydroxyapatite(PLLA/CNT/HAP)bone scaffolds possess enhanced mechanical properties and show good bioacti... Bacterial infection is a major problem following bone implant surgery.Moreover,poly-l-lactic acid/carbon nanotube/hydroxyapatite(PLLA/CNT/HAP)bone scaffolds possess enhanced mechanical properties and show good bioactiv-ityregardingbonedefectregeneration.Inthisstudy,wesynthesizedsilver(Ag)-dopedCNT/HAP(CNT/Ag-HAP)nanohybrids via the partial replacing of calcium ions(Ca2+)in the HAP lattice with silver ions(Ag+)using an ion doping technique under hydrothermal conditions.Specifically,the doping process was induced using the special lattice structure of HAP and the abundant surface oxygenic functional groups of CNT,and involved the partial replacement of Ca2+in the HAP lattice by doped Ag+as well as the in situ synthesis of Ag-HAP nanoparticles on CNT in a hydrothermal environment.The result-ing CNT/Ag-HAP nanohybrids were then introduced into a PLLA matrix via laser-based powder bed fusion(PBF-LB)to fabricate PLLA/CNT/Ag-HAP scaffolds that showed sustained antibacterial activity.We then found that Ag+,which pos-sesses broad-spectrum antibacterial activity,endowed PLLA/CNT/Ag-HAP scaffolds with this activity,with an antibacterial effectiveness of 92.65%.This antibacterial effect is due to the powerful effect of Ag+against bacterial structure and genetic material,as well as the physical destruction of bacterial structures due to the sharp edge structure of CNT.In addition,the scaffold possessed enhanced mechanical properties,showing tensile and compressive strengths of 8.49 MPa and 19.72 MPa,respectively.Finally,the scaffold also exhibited good bioactivity and cytocompatibility,including the ability to form apatite layers and to promote the adhesion and proliferation of human osteoblast-like cells(MG63 cells). 展开更多
关键词 Ag-doped Carbon nanotube/hydroxyapatite(cnt/HAP) Antibacterial properties Bone scaffold
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定位夹具对CNTs/6061Al复合材料超声波焊接接头质量影响研究
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作者 熊志林 谭范文 陈湘 《湖南工业职业技术学院学报》 2024年第2期1-5,共5页
采用超声波焊接制备CNTs增强铝基复合材料,针对超声波焊接定位不准,接头搭接面不贴合等问题,基于定位夹具以保证焊接过程质量,在工艺参数组合焊接能量500J,焊接压力0.45MPa,焊接振幅35μm下进行焊接试验。利用扫描电镜(SEM)、能谱仪(EDS... 采用超声波焊接制备CNTs增强铝基复合材料,针对超声波焊接定位不准,接头搭接面不贴合等问题,基于定位夹具以保证焊接过程质量,在工艺参数组合焊接能量500J,焊接压力0.45MPa,焊接振幅35μm下进行焊接试验。利用扫描电镜(SEM)、能谱仪(EDS)等对接头界面组织和成分进行了研究,并对焊接接头进行了剪切力和硬度测试。结果表明:在定位夹具下焊接的接头界面发生明显塑性且CNTs在铝基体扩散较好,接头强度显著提升,剪切力平均值达到786.55N、硬度为72HV,本研究对现有的有色金属超声波焊接制造工艺提出一种新的解决思路和方案,具有一定的工程应用价值和经济效益。 展开更多
关键词 超声波焊接 定位夹具 碳纳米管 铝基复合材料 接头强度
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锰基金属有机骨架复合CNT电极的制备及其储锂性能
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作者 王亚清 苏芸 +2 位作者 李娜 都玲玲 王斌 《微纳电子技术》 CAS 2024年第9期11-17,共7页
为了制备出高性能的锂离子电池负极材料,以1,4-二氰基苯、碳纳米管(CNT)和氯化锰为原料,通过溶剂热法成功合成了一种新型锰基金属有机框架复合碳纳米管(Mn-MOF/CNT)材料。通过扫描/透射电子显微镜(SEM/TEM)、X射线衍射仪(XRD)和比表面... 为了制备出高性能的锂离子电池负极材料,以1,4-二氰基苯、碳纳米管(CNT)和氯化锰为原料,通过溶剂热法成功合成了一种新型锰基金属有机框架复合碳纳米管(Mn-MOF/CNT)材料。通过扫描/透射电子显微镜(SEM/TEM)、X射线衍射仪(XRD)和比表面积分析仪研究了Mn-MOF/CNT的结构和形貌。将Mn-MOF/CNT用作锂离子电池负极材料,表现出较好的储锂性能。Mn-MOF/CNT负极材料在0.1 A·g^(-1)的电流密度下,首圈循环的充电比容量达到1143 mA·h·g^(-1),经过100圈循环后,充电比容量还能保持787 mA·h·g^(-1)。同时,Mn-MOF/CNT负极材料展现出了优异的倍率性能,经过10 A·g^(-1)的大电流密度循环后,电流密度再恢复到0.1 A·g^(-1)时,其充电比容量仍然可以恢复到729 mA·h·g^(-1)。因此该新型Mn-MOF/CNT负极材料具有潜在的商业化前景。 展开更多
关键词 负极材料 锂离子电池 锰基金属有机骨架(Mn-MOF) 电化学性能 碳纳米管(cnt)
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Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device 被引量:8
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作者 Feitian Ran Xueqing Xu +3 位作者 Duo Pan Yuyan Liu Yongping Bai Lu Shao 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第4期1-13,共13页
The controllable construction of two-dimensional(2D)metal–organic framework(MOF)nanosheets with favorable electrochemical performances is greatly challenging for energy storage.Here,we design an in situ induced growt... The controllable construction of two-dimensional(2D)metal–organic framework(MOF)nanosheets with favorable electrochemical performances is greatly challenging for energy storage.Here,we design an in situ induced growth strategy to construct the ultrathin carboxylated carbon nanotubes(C-CNTs)interpenetrated nickel MOF(Ni-MOF/C-CNTs)nanosheets.The deliberate thickness and specific surface area of novel 2D hybrid nanosheets can be effectively tuned via finely controlling C-CNTs involvement.Due to the unique microstructure,the integrated 2D hybrid nanosheets are endowed with plentiful electroactive sites to promote the electrochemical performances greatly.The prepared Ni-MOF/C-CNTs nanosheets exhibit superior specific capacity of 680 C g^−1 at 1 A g^−1 and good capacity retention.The assembled hybrid device demonstrated the maximum energy density of 44.4 Wh kg^−1 at a power density of 440 W kg^−1.Our novel strategy to construct ultrathin 2D MOF with unique properties can be extended to synthesize various MOF-based functional materials for diverse applications. 展开更多
关键词 Metal–organic frameworks Carbon nanotubes Ultrathin 2D nanosheets Hybrid supercapacitor
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Dispersion and Performance Properties of Carbon Nanotubes (CNTs) Based Polymer Composites: A Review 被引量:9
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作者 Bhagwan F. Jogi Mayur Sawant +1 位作者 Madan Kulkarni Prakash K. Brahmankar 《Journal of Encapsulation and Adsorption Sciences》 2012年第4期69-78,共10页
Carbon nanotubes (CNTs) based polymer composites have variety of engineering applications (electromagnetic shielding, antistatic coatings, high-strength low-density corrosion-resistant components, lightweight energy s... Carbon nanotubes (CNTs) based polymer composites have variety of engineering applications (electromagnetic shielding, antistatic coatings, high-strength low-density corrosion-resistant components, lightweight energy storage and many more);due to their excellent mechanical, electrical, chemical, magnetic, etc. properties. In the polymer nanocomposites CNTs are dispersed in the polymeric matrix. However the dispersion may be uniform or may not be uniform. The biggest challenge is the effective dispersion of individual CNTs in the polymer matrices, as CNTs tends to form clusters and bundles due to strong van der Waals’ forces of attraction. The aggregated structure continue until physical (Mechanical) or chemical modification (Encapsulation/surface modification) of CNTs. Few modification methods such as vigorous mixing of the polymers damages CNTs structure, and may hinder their properties. But these problems can be overcome by mechanical or chemical modification of CNTs surfaces. In the chemical modification, the modifier or the long tail surfactant may encapsulate and/or partially wrap the CNTs surfaces. In this review, recent work on CNTs based polymer nanocomposite is carried out with few modifiers/encapsulating agents. Incorporation of CNTs in polymer matrix changes the performance properties such as tensile strength, tensile modulus, elongation at break, toughness, Dynamic mechanical thermal analysis (DMTA), etc. The phase morphology of the composite materials throws light on the properties of CNTs based polymer nanocomposite. Moreover phase morphology may be directly correlated with the behavior of the material, hence reviewed here through transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Furthermore review is also carried out on the non-isothermal crystallization (DSC) and rheology of CNTs polymer nanocomposite. 展开更多
关键词 Carbon nanotubeS (cnts) Encapsulation/Surface Modification Transmission Electron MICROSCOPY (TEM) Mechanical Properties CRYSTALLIZATION
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High-loading Co-doped NiO nanosheets on carbon-welded carbon nanotube framework enabling rapid charge kinetic for enhanced supercapacitor performance 被引量:2
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作者 Hao Xu Yufang Cao +4 位作者 Yong Li Pei Cao Dandan Liu Yongyi Zhang Qing wen Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第11期240-247,共8页
Developing high power and energy supercapacitors(SCs)is a long-pursued goal for the application in transportation and energy storage station.Herein,a rationally-designed Co-doped nickel oxide nanosheets@carbon-welded ... Developing high power and energy supercapacitors(SCs)is a long-pursued goal for the application in transportation and energy storage station.Herein,a rationally-designed Co-doped nickel oxide nanosheets@carbon-welded carbon nanotube foam(Co-doped NiO@WCNTF)as freestanding electrode is successfully prepared for high power and energy SCs.The WCNTF framework with high specific surface area provides three dimensional highly conductive network for fast charge transport and ensures high loading of active materials(9.2 mg/cm2).Moreover,porous Co-doped NiO nanosheets uniformly anchored on the WCNTF framework enable rapid charge kinetics due to the high intrinsic conductivity of Co-doped Ni O nanosheets and their good contact with conductive WCNTF substrate.As a result,the unique integrated electrode with 3D architecture exhibits an ultrahigh specific capacitance of 11.45 F/cm2 at 5 mA/cm2,outstanding rate capability(11.45 F/cm2 at 5 mA/cm2 and a capacitance retention of 86.2%at 30 mA/cm2)and good cycling stability,suggesting great potential for high performance supercapacitor. 展开更多
关键词 Carbon nanotube foam Pseudocapacitors Co-doped NiO nanosheets Freestanding electrode
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DFT Study of Physisorption Effect of the Curcumin on CNT(8,0-6) Nanotube for Biological Applications 被引量:1
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作者 SIYAMAK Shahab MASOOME Sheikhi +2 位作者 MEHRNOOSH Khaleghian IRYNA Balakhanava FATEMEH Azarakhshi 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第1期37-52,2,共17页
In the given work the adsorption properties of molecule curcumin((1 E,6 E)-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione) on CNT(8,0-6) nanotube were investigated by the density functional theory(DFT) in... In the given work the adsorption properties of molecule curcumin((1 E,6 E)-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione) on CNT(8,0-6) nanotube were investigated by the density functional theory(DFT) in the solvent water for the first time. The non-bonded interaction effects of compounds curcumin and CNT(8,0-6) nanotube on the electronic properties, UV/Vis spectra, chemical shift tensors and natural charges were determined and discussed. The electronic spectra of the compound curcumin and the complex CNT(8,0-6)/curcumin in the solvent water were calculated by time dependent density functional theory(TD-DFT) for investigation of the maximum wavelength value of molecule Curcumin before and after the non-bonded interaction with the CNT(8,0-6) nanotube and molecular orbitals involved in the formation of absorption spectrum of the complex CNT(8,0-6)/curcumin at maximum wavelength. 展开更多
关键词 cnt(8 0-6)nanotube CURCUMIN DFT INTERACTION PHYSISORPTION
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原位合成CNTs/Cu-Al_(2)O_(3)复合材料的性能研究 被引量:3
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作者 陈杰茹 刘平 《有色金属材料与工程》 2023年第1期31-39,共9页
对Al的质量分数分别为0.20%,0.35%,0.60%的Cu-Al合金粉末进行内氧化,得到CuAl_(2)O_(3)粉末。采用化学气相沉积法在Cu-Al_(2)O_(3)粉末表面原位生长碳纳米管(carbon nano tubes,CNTs),采用放电等离子烧结工艺成功制备了CNTs/Cu-Al_(2)O_... 对Al的质量分数分别为0.20%,0.35%,0.60%的Cu-Al合金粉末进行内氧化,得到CuAl_(2)O_(3)粉末。采用化学气相沉积法在Cu-Al_(2)O_(3)粉末表面原位生长碳纳米管(carbon nano tubes,CNTs),采用放电等离子烧结工艺成功制备了CNTs/Cu-Al_(2)O_(3)复合材料。采用扫描电子显微镜和透射电子显微镜观察了CNTs/Cu-Al_(2)O_(3)复合粉末、复合材料断口的形貌。采用显微硬度计、微拉伸试验机、摩擦磨损试验机分别对纯Cu及复合材料的维氏硬度、抗拉强度、摩擦因数进行测试。采用电化学工作站测试复合材料在3.5%NaCl(质量分数)水溶液中的耐腐蚀性能。结果表明,随着Al的质量分数的增加,粉末表面合成的CNTs的数量也增多。Al的质量分数为0.35%时,CNTs/Cu-Al_(2)O_(3)复合材料的综合性能最佳,与纯Cu相比,复合材料的抗拉强度和腐蚀电势分别提高了86.4%和43.2%,分别为315 MPa和-0.268 V,摩擦因数降低了53.3%,仅为0.28。 展开更多
关键词 cnts/Cu-Al_(2)O_(3)复合材料 碳纳米管 化学气相沉积
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SiO_(2)溶胶和CNTs杂化增强水泥基复合材料性能研究 被引量:1
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作者 卢欢欢 王文广 李佩枫 《混凝土与水泥制品》 2023年第3期10-14,共5页
采用超声波法制备了SiO_(2)溶胶-碳纳米管(CNTs)分散液,研究了SiO_(2)溶胶-CNTs分散液对水泥基复合材料性能的影响,并用SEM、EDS、XRD微观测试方法对其进行了表征。结果表明:以SiO_(2)溶胶为分散介质,通过超声波法能够实现CNTs在水泥基... 采用超声波法制备了SiO_(2)溶胶-碳纳米管(CNTs)分散液,研究了SiO_(2)溶胶-CNTs分散液对水泥基复合材料性能的影响,并用SEM、EDS、XRD微观测试方法对其进行了表征。结果表明:以SiO_(2)溶胶为分散介质,通过超声波法能够实现CNTs在水泥基复合材料中的均匀分散;掺1.5%的SiO_(2)溶胶和0.15%的CNTs能进一步提高砂浆的力学性能;SiO_(2)溶胶的火山灰活性消耗了砂浆中多余的水化产物Ca(OH)_(2),形成C-S-H凝胶密实了砂浆结构,CNTs在水泥浆体和细骨料界面之间起到纤维增强的作用,细化了孔隙,填补了微裂缝,降低了孔隙率。 展开更多
关键词 碳纳米管 SiO_(2)溶胶 流动性 力学性能 微观结构
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Carbon nanotube and graphene reinforced magnesium matrix composites:A state-of-the-art review 被引量:3
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作者 Lava Kumar Pillari Kyle Lessoway Lukas Bichler 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2023年第6期1825-1905,共81页
Magnesium(Mg)composites reinforced with carbon-based nanomaterial(CBN)often exhibit low density,enhanced strength,good conductivity,improved wear resistance,and excellent biocompatibility when compared to current indu... Magnesium(Mg)composites reinforced with carbon-based nanomaterial(CBN)often exhibit low density,enhanced strength,good conductivity,improved wear resistance,and excellent biocompatibility when compared to current industry Mg alloys.This review aims to critically evaluate recent developments in Mg-CBN composites and is divided into five sections:First,a brief introduction to Mg-CBN composites is provided,followed by a discussion of different fabrication techniques for these composites,including powder metallurgy,casting,friction stir processing,and selective laser melting.A particular focus is on the current processing challenges,including dispersion strategies to create homogeneous Mg-CBN composites.The effect of processing on the quantifying disorder in CBNs and distinguishing different sp2carbon materials is also highlighted.Then,the effect of CBN on various properties of Mg-CBN composites is thoroughly analyzed,and the strengthening efficiency of CNTs and graphene in the Mg matrix is examined.Finally,the potential applications of Mg-CBN composites in various industries are proposed,followed by a summary and suggestions for future research directions in the field of Mg-CBN composites. 展开更多
关键词 MAGNESIUM Carbon nanotubes(cnts) GRAPHENE Nanocomposites Processing Mechanical properties
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层间CNT协同电纺取向BNNS增强的绝缘高导热聚偏氟乙烯多层复合薄膜
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作者 迟洪涛 马传国 +3 位作者 宋沐原 李晓磊 张平 戴培邦 《材料工程》 EI CAS CSCD 北大核心 2023年第11期171-181,共11页
基于不同导热填料的混杂协同和取向增强,先后经过静电纺丝氮化硼纳米片(BNNS)/聚偏氟乙烯(PVDF)薄膜、表面喷涂碳纳米管(CNT)以及多层薄膜热压的工艺路线,制备出高面内热导率且绝缘的BNNS-CNT/PVDF复合薄膜。静电纺丝技术使BNNS在PVDF... 基于不同导热填料的混杂协同和取向增强,先后经过静电纺丝氮化硼纳米片(BNNS)/聚偏氟乙烯(PVDF)薄膜、表面喷涂碳纳米管(CNT)以及多层薄膜热压的工艺路线,制备出高面内热导率且绝缘的BNNS-CNT/PVDF复合薄膜。静电纺丝技术使BNNS在PVDF薄膜中实现较好的面内取向,喷涂的CNT在薄膜层间构建高效的热传输通路,对相邻纤维膜中的BNNS具有桥接作用,从而促进面内导热网络的搭建,但仍能保持良好的绝缘性能。作为薄膜制备条件优化的结果,在BNNS填充量为30%(质量分数,下同)、CNT填充量为3%的BNNS-CNT/PVDF复合薄膜的面内热导率达到3.25 W·m^(-1)·K^(-1),比纯PVDF提高了1104%,面外电导率低至2.09×10^(-12) S·cm^(-1)。BNNS和CNT协同构建高效的导热网络,在BNNS填充量为5%时,3%CNT对BNNS/PVDF的增强效率高达52.2%。同时,该薄膜还具有良好的拉伸强度和柔韧性。 展开更多
关键词 聚合物基复合材料 热导率 静电纺丝 碳纳米管 氮化硼纳米片
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Effects of Orientation of Carbon Nanotubes on CNT Bundle Based Silk Composite Using Finite Element Method
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作者 Md Shihamul Islam Jerzy Szpunar 《Modeling and Numerical Simulation of Material Science》 2013年第1期33-38,共6页
Carbon Nanotubes (CNTs) have exceptional mechanical properties. They are the stiffest and strongest material, yet discovered, because of their high length to diameter ratio. In this paper a Representative Volume Eleme... Carbon Nanotubes (CNTs) have exceptional mechanical properties. They are the stiffest and strongest material, yet discovered, because of their high length to diameter ratio. In this paper a Representative Volume Element (RVE) model of CNT-silk composite is made. Then the orientations of the CNTs in the composite are varied and the effects of this variation are observed. The change is mainly observed between the interfaces of CNT and silk. Also there is a change in Young’s Modulus. COMSOL Multiphysics 4.2a is used for building model and performing simulations. 展开更多
关键词 Carbon nanotubeS (cnts) Orientation Interface Young’s MODULUS RVE FEM COMSOL MULTIPHYSICS 4.2a
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Study on Low-Temperature Properties of the Asphalt Modified by Carbon Nanotubes(CNTs)and Crumb Rubber(CR)
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作者 Liu Yumei Zheng Mulian +3 位作者 Liu Xia Wang Chongtao Cheng Yong Wang Ke 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2022年第1期36-47,共12页
The effect of adding crumb rubber(CR)and carbon nanotubes(CNTs)on the low-temperature properties of virgin asphalt was studied.Using the force-ductility test and the bending beam rheometer(BBR)test,the deformation res... The effect of adding crumb rubber(CR)and carbon nanotubes(CNTs)on the low-temperature properties of virgin asphalt was studied.Using the force-ductility test and the bending beam rheometer(BBR)test,the deformation resistance and rheological properties of asphalt samples at low temperatures were evaluated,respectively.Based on the result of BBR test,the creep functions of the Burgers model and the Zener model were used to fit the low-temperature creep characteristics of the asphalt samples.Furthermore,the differential scanning calorimetry(DSC)test and the attenuated total reflection-Fourier transform infrared spectroscopy(ATR-FTIR)test were utilized to appraise the low-temperature stability and chemical properties of asphalt samples,respectively.The results showed that CR significantly improved the low-temperature properties of virgin asphalt,while CNTs had little effect.Moreover,during the degradation of CR,aromatic and aliphatic components were released.In particular,the aliphatic components of CR-modified asphalt were much higher than those of virgin asphalt,which had a significant effect on improving the low-temperature properties of the asphalt.The DSC test results showed that CR enhanced the low-temperature stability of the asphalt,while the addition of CNTs presented a slightly negative effect. 展开更多
关键词 low-temperature properties crumb rubber(CR) carbon nanotubes(cnts) creep characteristic asphalt components
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Preparation and characterization of new photocatalyst combined MWCNTs with TiO_2 nanotubes
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作者 朱志平 黄可龙 周艺 《中国有色金属学会会刊:英文版》 CSCD 2007年第A02期1117-1121,共5页
A new type of photocatalysts MWCNTs/TiO2-NTs nanocomposites prepared by combining multi-walled carbon nanotube(MWCNTs) with TiO2-derived nanotubes were synthesized by a modified hydrothermal method. The SEM,XRD,UV-Vis... A new type of photocatalysts MWCNTs/TiO2-NTs nanocomposites prepared by combining multi-walled carbon nanotube(MWCNTs) with TiO2-derived nanotubes were synthesized by a modified hydrothermal method. The SEM,XRD,UV-Vis and TG-DTG were used to characterize its property. The produced MWCNTs/TiO2-NTs nanocomposites were used as the catalysts for photo-degradation of aquatic humic substances,Their photocatalytic efficiency was evaluated by the photodegradation of humic acid in an aqueous solution under ultraviolet light irradiation. The results show MWCNTs could enhance the activity of the photocatalysts;the best degradation efficiency was obtained by using MWCNTs/TiO2-NTs nanocomposites containing 20% MWCNTs as the photo-catalyst. 展开更多
关键词 碳纳米管 二氧化钛纳米管 光催化剂 腐殖酸 催化活性
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