共查询到19条相似文献,搜索用时 62 毫秒
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常温直接沉淀法制备ZnO纳米棒 总被引:12,自引:1,他引:11
在常温下, 以PEG-400(聚乙二醇400)为表面活性剂, 采用直接沉淀法合成了ZnO纳米棒. 产物用XRD, TEM, SAED和 HRTEM等进行了表征. 结果表明, 所得ZnO为一维的纳米棒, 属于六方纤维矿的单晶结构. ZnO纳米棒的直径在20~40 nm之间, 长度在300~800 nm范围. (0001)面为ZnO纳米棒的生长方向. 讨论了ZnO相的生成和ZnO纳米棒的形成机理以及PEG-400在其形成过程中的作用. 相似文献
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采用温和的溶液路线在Zn基片上合成了单晶态的ZnO纳米棒阵列、纳米片阵列和ZnS/ZnO复合双层纳米棒阵列.使用X射线粉末衍射仪、扫描电子显微镜、高分辨透射电子显微镜、X射线光电子能谱仪等对产物的组成、结构及形貌进行了表征.讨论了表面活性剂在液相合成中对产物形貌的调控作用.通过室温发射光谱的测定,研究了所得纳米阵列材料的发光性质. 相似文献
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以分析纯ZnO作为锌源、NaOH为矿化剂、盐酸为反应溶液pH调节剂,利用水热反应制备了花状ZnO纳米棒;采用扫描电子显微镜和X射线衍射仪分析了产物的形貌和结构,考察了水热温度以及Zn2+和OH-浓度比对产物形貌的影响;以甲基橙为目标降解物,采用紫外-可见分光光度计研究了ZnO纳米棒的光催化性能.结果表明,在水热反应温度80℃、Zn2+/OH-浓度比1∶7.5条件下所得ZnO纳米棒呈花状聚合,直径约为200nm,长度约为2μm,具有六方纤锌矿结构.当甲基橙初始浓度为30 mg.L-1、ZnO纳米棒的投放量为1.5g.L-1时,以300W紫外灯照射150min,甲基橙的降解率可达90%. 相似文献
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以CuC2O4纳米微球为模板,通过水热法在120 ℃、1 h时成功合成了一维CuC2O4/ZnO异质结构。 采用热重分析(TGA)、场发射扫描电子显微镜(FE-SEM)、能量散射X射线谱(EDX)、透射电子显微镜(TEM)和X射线粉末衍射(XRD)等测试技术对产物的结构和形貌进行了表征。 结果表明,所得产物为一维CuC2O4/ZnO纳米棒束,长约1 μm,直径约500 nm。 每个棒束由许多纳米棒沿同一方向组装而成。 TEM照片和EDX光谱表明,CuC2O4和ZnO形成了均匀的异质结构。 相似文献
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利用简单的水热合成法在p-GaN薄膜上制备了Ag掺杂的一维ZnO纳米棒(ZnO NRs),并且研究了Ag掺杂对于ZnO NRs结构和形貌以及n-ZnO NRs/p-GaN异质结发光特性的影响。结果表明,不同Ag掺杂浓度的ZnO纳米棒截面均呈六边形的棒状结构,且纳米棒的取向垂直于衬底;XRD分析结果表明,随着Ag掺杂浓度的增加,ZnO纳米棒(0002)晶面的峰位向衍射角减小的方向移动,表明Ag+置换了ZnO晶格中的部分Zn2+后使其晶格常数略增加;随着Ag掺杂浓度的增加,ZnO纳米棒近带边发光峰发生一定的红移并且强度逐渐减弱,黄带发光峰逐渐增强,n-ZnO NRs/p-GaN异质结具有更好的传输效率。 相似文献
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一种在固体基底上制备高度取向氧化锌纳米棒的新方法 总被引:9,自引:1,他引:8
采用廉价、低温的方法,在修饰过ZnO纳米粒子膜的ITO基底上成功制备出具有 高长径比、高度取向的ZnO纳米棒阵列,用扫描电子显微镜(SEM),X射线衍射(XRD) ,高分辨透射电子显微镜(HRTEM)以及拉曼光谱对制备出的ZnO纳米棒的结构和形貌 进行了表征,测试结果表明,ZnO纳米棒是单晶,属于六方晶系,与基底直,上仍 沿(001)晶面择优生长的特征,并且ZnO纳米棒基本上无氧空位的存在,统计结果显 示,水热反应2h后90%以上的ZnO纳米棒直径为120~190nm,长度为4μm 相似文献
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Dali Yan Shenyu Li Shiyu Liu Ming Tan Dejun Li Yun Zhu 《Journal of Solid State Electrochemistry》2016,20(2):459-468
The zinc oxide (ZnO) nanorods with different aspect ratio (length/diameter) were grown directly on the porous silicon (PS) substrate through electrochemical synthesis. The obtained ZnO nanorods/PS products were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and gas-sensing test. Comparative study shows that the addition of nonionic polymer polyvinylpyrrolidone (PVP) into oxygenated zinc chloride electrolyte can modulate the crystal growth and the aspect ratio of ZnO nanorods from electrodeposition, thus, influence the gas-sensing properties of ZnO nanorods/PS composites. With appropriate amount of PVP in the electrolyte, the product possessing high-density and large aspect ratio ZnO nanorods has an obvious improvement of the NO2-sensing performances with high sensitivity, fast response-recovery characteristic, and good repeatability and selectivity. The gas-sensing mechanism was discussed in the paper. The result indicated that the heterojunction effect of ZnO nanorods and PS may be responsible for the excellent gas-sensing properties. 相似文献
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采用化学气相沉积法,在没有采用任何催化剂的条件下,在Si(100)衬底上成功制备出Sb掺杂大尺寸ZnO纳米棒,并对样品进行了结构和光学性质的表征。结果表明:纳米棒为结晶质量较好的六角纤锌矿结构,在能量色散谱(EDS)中观测到了Sb元素的存在。此外,在低温光致发光(PL)光谱中还观测到了与Sb掺杂相关的中性受主束缚激子发光峰(A0X)、自由电子到受主能级跃迁的发光峰(FA)、施主受主对(DAP)以及DAP的一级纵向光声子伴线(DAP-1LO),因此证实Sb元素作为受主杂质掺杂已进入ZnO晶格。 相似文献
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电沉积制备ZnO纳米棒修饰电极上氧化还原蛋白的电化学行为 总被引:1,自引:0,他引:1
采用恒电位阴极还原法在金电极表面一步修饰ZnO纳米棒, 制备成ZnO纳米棒修饰电极. 扫描电子显微镜(SEM)和X射线衍射(XRD)结果显示制得的ZnO为直径约100 nm的六棱柱状纤锌矿晶体纳米棒. 使用ZnO纳米棒修饰的金电极研究细胞色素c的直接电化学行为, 结果表明: ZnO纳米棒修饰的金电极能有效探测到细胞色素c的铁卟啉辅基在不同价态下的电化学行为; 细胞色素c吸附后, ZnO纳米棒修饰的金电极对过氧化氢的电流响应呈现良好的线性关系. 相似文献
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A. L. Stroyuk V. V. Shvalagin I. E. Kotenko S. Ya. Kuchmii V. F. Plyusnin 《Theoretical and Experimental Chemistry》2010,46(4):218-224
The photochemical reduction of sulfur by the action of ZnO nanoparticles of various shapes and sizes under the conditions
of stationary and pulsed photoexcitation was studied. The mechanism of this process was proved; the main route to the formation
of the reaction product zinc sulfide is reduction of the sulfur by photochemically produced metallic zinc. It was demonstrated
that ordered agglomerates of ZnS nanoparticles in the form of nanotubes and nanorods are formed in the systems based on ZnO
nanorods. 相似文献
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The Development of Highly Sensitive and Selective Immunosensor Based on Antibody Immobilized ZnO Nanorods for the Detection of D‐Dimer 下载免费PDF全文
Zafar H. Ibupoto Nikolaos Mitrou Georgia‐Paraskevi Nikoleli Dimitrios P. Nikolelis Magnus Willander Nikolas Psaroudakis 《Electroanalysis》2014,26(2):292-298
ZnO nanorods were grown on gold coated glass substrate by low temperature aqueous chemical growth method. Scanning electron microscopy (SEM) and X‐ray diffraction (XRD) techniques were used for the characterization of ZnO nanorods. ZnO nanorods are highly dense, uniform, well aligned and perpendicular‐oriented to the substrate. ZnO nanorods exhibited good crystal quality. The well aligned ZnO nanorods were potentially used for the development of selective and sensitive immunosensor for the detection of D‐dimer by immobilizing antibody on stabilized lipid films. The ZnO nanorods based immunosensor responded to a wide range of D‐dimer concentrations with fast response time of ca. 20 s. 相似文献
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Zinc Oxide (ZnO) nanorod arrays were grown on different substrates by hydrothermal method. The crystallinity of ZnO nanorod was regularly investigated by X-ray diffraction (XRD). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to examine morphology of the ZnO nanorods. The results indicate that the nanorods grow along [002] orientation. SEM and TEM images and XRD patterns show that the growth of ZnO nanorods on graphene/Quartz substrate is better than the other substrates due to the number and size of the nanorods which are highly affected through the properties of ZnO seed layers and it has lower defects than the other substrates. PL spectra ZnO would have a higher concentration of oxygen vacancy. 相似文献
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Aligned ZnO nanorod arrays were synthesized using a chemical bath deposition method at normal atmospheric pressure without any metal catalyst. A simple two-step process was developed for growing ZnO nanorods on a PET substrate at 90-95 degrees C. The ZnO seed precursor was prepared by a sol-gel reaction. ZnO nanorod arrays were fabricated on ZnO-seed-coated substrate. The ZnO seeds were indispensable for the aligned growth of ZnO nanorods. The ZnO nanorods had a length of 400-500 nm and a diameter of 25-50 nm. HR-TEM and XRD analysis confirmed that the ZnO nanorod is a single crystal with a wurtzite structure and its growth direction is [0001] (the c-axis). Photoluminescence measurements of ZnO nanorods revealed an intense ultraviolet peak at 378.3 nm (3.27 eV) at room temperature. 相似文献