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《精细与专用化学品》2009,(22):4-4
最近,中科院固体物理所盂国文小组在“多段异质纳米线与纳米管组成的分支结构”研究方面取得进展。科研人员以分支形貌孔的氧化铝为模板,采用电沉积(生长纳米线)与化学气相沉积技术(生长纳米管)结合,获得了4种由纳米线/纳米管联结组成的复杂分支结构。在此基础上,他们在化学气相沉积前,用选择腐蚀技术腐蚀掉一小段纳米线.紧接着在纳米线的两端生长纳米管,从而筑了3种由纳米管/纳米线/纳米管组成的三段异质分支纳米结构。 相似文献
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结合二氧化钛纳米管和纳米粒子来增强染料敏化的太阳电池之功效Li X D& Others Mat.Chem.Phys.Vol124,No1,179—83(2010)由工业用二氧化钛粉末经碱性水热转换制造成二氧化钛纳米管。用不同重量比的二氧化钛纳米管和专用的二氧化钛纳米粒子所制成的二氧化钛膜而构成了染料敏化的太阳电池。按该电池的电化学阻抗光谱和光伏特性在照明下和在暗处二方面评估了 相似文献
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采用阳极氧化法在纯钛表面生成结构高度有序的二氧化钛纳米管阵列,并通过室温固相反应制备了钯纳米颗粒。采用自组装方法将钯纳米颗粒修饰到Ti/TiO2表面制备了Ti/TiO2/Pd纳米电极。利用电子扫描显微镜、X-射线衍射分析二氧化钛纳米管、钯纳米颗粒和纳米电极的微观结构和表面形貌,并研究了Ti/TiO2/Pd纳米电极对甲醇的电催化性能。结果表明,TiO2纳米管排列整齐有序,Ti/TiO2/Pd电极中Pd纳米颗粒均匀分散在TiO2纳米管表面。电化学测试结果表明,Ti/TiO2/Pd纳米电极对甲醇的电催化氧化过程具有很好的电催化活性。 相似文献
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由华南理工大学申请的专利(专利号CN1746216,公开日期2006-03—15)“埃洛石纳米管用于制备聚合物复合材料的方法”,是将埃洛石纳米管与聚合物按一定质量比混合,使埃洛石纳米管均匀分散于聚合物基体中,然后成型得到聚合物复合材料制品。埃洛石纳米管是一种天然粘士矿物,由硅酸盐片层在天然条件下卷曲而成,呈微管状结构,克服了现有纳米填料分散困难的缺点,且价廉易得, 相似文献
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将浓碱水热法制备的钛酸盐纳米管(TNT),采用二次水热和高温煅烧法制备了不同形貌的锐钛矿相TiO2纳米管(NT)和TiO2纳米棒(NB)光催化剂,通过XRD、TEM、UV-vis漫反射吸收光谱(DRS)对产物进行表征,研究光催化剂对氯霉素的光催化降解性能。结果表明,不同形貌TiO2光催化剂对氯霉素具有不同的催化活性,TiO2纳米管(NT)比TiO2纳米棒(NB)有更好的吸附性能;在高压汞灯辐射下,TiO2纳米棒(NB)对氯霉素的光催化降解效率高于TiO2纳米管(NT)。在高压汞灯下TiO2纳米管(NT)和TiO2纳米棒(NB)对氯霉素的光催化降解过程均遵从Langmuir-Hinshelwood动力学模型。 相似文献
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浓HNO_3通过沸点回流法对碳纳米管(Carbon Nanotubes,CNTs)进行处理,去除表面杂质并对CNTs切断开管,在开口处被修饰上羧基、羟基等基团。增加了碳纳米管(CNTs)在水及有机溶剂中的溶解性,另外通过湿化学法,在均相溶液中对碳纳米管(CNTs)包裹鲁米诺(Luminol)的实验条件也进行了优化,选择直径大的碳纳米管(CNTs)且溶解性较好的溶剂二甲亚砜(DMSO)。在检测方面采用Luminol-Co~(2+)-H_2O_2化学发光体系,对包裹鲁米诺(Luminol)的碳纳米管(CNTs)进行化学发光测试,该方法简单,灵敏。 相似文献
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采用化学修饰的方法,用偶联剂3-氨基丙基三乙氧基硅烷(APTEs)对多壁碳纳米管进行酰胺化,并采用红外光谱和拉曼光谱对其结构进行表征,研究结果表明,用偶联剂修饰后的碳纳米结构并未发生改变。同时采用原位TG-MS技术研究了NO在多壁碳纳米管的吸附和脱附行为,TG等温吸附曲线结果表明,在温度一定的条件下,酰胺化多壁碳纳米管对NO的吸附量为未改性多壁碳纳米管的3倍;TG-DTG的等温脱附曲线实验研究表明,NO在酰胺化多壁碳纳米管脱附的温度点较多,同时其原位MS实验结果进一步印证了这一结论。另外考察了温度对碳纳米管吸附NO性能的影响,实验结果表明吸附温度对NO在多壁碳纳米管上的吸附量有较大的影响,酰胺化多壁碳纳米管对NO的最佳吸附温度为100 ℃。 相似文献
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Hollow glass microspheres (HGMs)/epoxy syntactic foam were reinforced by hybrid functionalized carbon nanotubes that were synthesized by simultaneous covalent and noncovalent functionalization of carbon nanotubes. The effect of hybrid functionalized carbon nanotubes on density, mechanical properties, and water absorption of HGMs/epoxy syntactic foam was studied. The study indicated that the dispersion of carbon nanotubes in epoxy resin can be improved by hybrid functionalization. The compression strength of syntactic foam reinforced by hybrid functionalized carbon nanotubes was significantly enhanced. The maximum compressive strength of syntactic foam corresponding to chitosan modified carbon nanotubes approached 60 MPa. Hybrid functionalized carbon nanotubes had little effect on the water absorption ability of syntactic foam, and was less than 1%. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48586. 相似文献
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《Chemical engineering science》2004,59(22-23):4665-4671
Ever since the discovery of carbon nanotubes, several strategies have been developed for the synthesis of multi-walled carbon nanotubes (MWNTs) as well as single-walled carbon nanotubes (SWNTs). We examine novel methods such as the precursor route and nebulized spray pyrolysis for the synthesis of MWNTs as well as junction nanotubes. Nanotubes of inorganic layered materials obtained by various ingenious methods are discussed. Nanowires of inorganic materials are synthesized not only by high temperature methods such as the carbon-assisted route, but also by soft chemical routes. We describe some of the soft chemical routes for the synthesis of inorganic nanotubes and nanowires. Some of the properties and applications of the nanotubes and nanowires are briefly described. 相似文献
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用酸氧化法对多壁碳纳米管(MWNTs)进行羧化处理后引入酰氯基团,利用酰氯基团与环氧酯聚合物中的羟基进行缩聚反应将MWNTs接枝到环氧树脂结构中,合成得到碳纳米管接枝改性的环氧酯聚合物。该聚合物与丙烯酸单体进行自由基聚合,在聚合物中引入羧基,利用羧基与有机胺中和成盐,制得水性碳纳米管接枝改性环氧酯聚合物。对聚合物进行红外光谱和透射电镜分析表明,碳纳米管与环氧酯聚合物进行了接枝反应。 相似文献
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Woo Ram Jung Jin Hyuk Choi Naesung Lee Kwanwoo Shin Jun-Hyuk Moon Young-Soo Seo 《Carbon》2012,50(2):633-636
A pre-treatment method of carbon nanotubes for ultrasound-assisted dispersion in a solution is reported. Compared to untreated nanotubes, supercritical-fluid (SCF)-treated carbon nanotubes were easily dispersed in an aqueous surfactant solution by using ultrasonication. The nanotubes are found to be less damaged and less shortened, which was confirmed by Raman spectroscopy and dynamic light scattering, respectively. Supercritical ethane was more effective than supercritical CO2 in treating the carbon nanotubes. 相似文献