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Relevant bibliographies by topics / Nanostructured metal

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Academic literature on the topic 'Nanostructured metal'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Nanostructured metal"

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Yang, Ming, Xiaohua Chen, Zidong Wang, Yuzhi Zhu, Shiwei Pan, Kaixuan Chen, Yanlin Wang, and Jiaqi Zheng. "Zero→Two-Dimensional Metal Nanostructures: An Overview on Methods of Preparation, Characterization, Properties, and Applications." Nanomaterials 11, no. 8 (July 23, 2021): 1895. http://dx.doi.org/10.3390/nano11081895.

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Metal nanostructured materials, with many excellent and unique physical and mechanical properties compared to macroscopic bulk materials, have been widely used in the fields of electronics, bioimaging, sensing, photonics, biomimetic biology, information, and energy storage. It is worthy of noting that most of these applications require the use of nanostructured metals with specific controlled properties, which are significantly dependent on a series of physical parameters of its characteristic size, geometry, composition, and structure. Therefore, research on low-cost preparation of metal nanostructures and controlling of their characteristic sizes and geometric shapes are the keys to their development in different application fields. The preparation methods, physical and chemical properties, and application progress of metallic nanostructures are reviewed, and the methods for characterizing metal nanostructures are summarized. Finally, the future development of metallic nanostructure materials is explored.

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Maciulis, Vincentas, Almira Ramanaviciene, and Ieva Plikusiene. "Recent Advances in Synthesis and Application of Metal Oxide Nanostructures in Chemical Sensors and Biosensors." Nanomaterials 12, no. 24 (December 10, 2022): 4413. http://dx.doi.org/10.3390/nano12244413.

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Nanostructured materials formed from metal oxides offer a number of advantages, such as large surface area, improved mechanical and other physical properties, as well as adjustable electronic properties that are important in the development and application of chemical sensors and biosensor design. Nanostructures are classified using the dimensions of the nanostructure itself and their components. In this review, various types of nanostructures classified as 0D, 1D, 2D, and 3D that were successfully applied in chemical sensors and biosensors, and formed from metal oxides using different synthesis methods, are discussed. In particular, significant attention is paid to detailed analysis and future prospects of the synthesis methods of metal oxide nanostructures and their integration in chemical sensors and biosensor design.

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Chen, Hongjun, and Lianzhou Wang. "Nanostructure sensitization of transition metal oxides for visible-light photocatalysis." Beilstein Journal of Nanotechnology 5 (May 23, 2014): 696–710. http://dx.doi.org/10.3762/bjnano.5.82.

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To better utilize the sunlight for efficient solar energy conversion, the research on visible-light active photocatalysts has recently attracted a lot of interest. The photosensitization of transition metal oxides is a promising approach for achieving effective visible-light photocatalysis. This review article primarily discusses the recent progress in the realm of a variety of nanostructured photosensitizers such as quantum dots, plasmonic metal nanostructures, and carbon nanostructures for coupling with wide-bandgap transition metal oxides to design better visible-light active photocatalysts. The underlying mechanisms of the composite photocatalysts, e.g., the light-induced charge separation and the subsequent visible-light photocatalytic reaction processes in environmental remediation and solar fuel generation fields, are also introduced. A brief outlook on the nanostructure photosensitization is also given.

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Li, Xin, Yiming Guo, and Hai Cao. "Nanostructured surfaces from ligand-protected metal nanoparticles." Dalton Transactions 49, no. 41 (2020): 14314–19. http://dx.doi.org/10.1039/d0dt02822c.

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Gnawali, Guna Nidha, Shankar P. Shrestha, Khem N. Poudyal, Indra B. Karki, and Ishwar Koirala. "Study on the effect of growth-time and seed-layers of Zinc Oxide nanostructured thin film prepared by the hydrothermal method for liquefied petroleum gas sensor application." BIBECHANA 16 (November 22, 2018): 145–53. http://dx.doi.org/10.3126/bibechana.v16i0.21557.

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Gas sensors are devices that can convert the concentration of an analytic gas into an electronic signal. Zinc oxide (ZnO) is an important n-type metal oxide semiconductor which has been utilized as gas sensor for several decades. In this work, ZnO nanostructured films were synthesized by a hydrothermal route from ZnO seeds and used as a liquefied petroleum gas (LPG) sensor. At first ZnO seed layers were deposited on glass substrates by using spin coating method, then ZnO nanostructured were grown on these substrates by using hydrothermal growth method for different time duration. The effect of growth time and seed layers of ZnO nanostructured on its structural, optical, and electrical properties was studied. These nanostructures were characterized by X-ray diffraction, scanning electron microscopy, optical spectroscopy, and four probes sheet resistance measurement unit. The sensing performances of the synthetic ZnO nanostructures were investigated for LPG.XRD showed that all the ZnO nanostructures were hexagonal crystal structure with preferential orientation. SEM reviled that the size of nanostructure increased with increase in growth time. Band gap and sheet resistance for ZnO nanostructured thin film decreased with increase in growth time. ZnO nanostructured thin film showed high sensitivity towards LPG gas. The sensitivity of the film is observed to increase with increase in no of seed layers as well as growth time. The dependence of the LPG sensing properties on the different growth time of ZnO nanostructured was investigated. The sensing performances of the film were investigated by measured change in sheet resistance under expose to LPG gas. BIBECHANA 16 (2019) 145-153

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LI, WEN, DAISUKE ISHIKAWA, and HIROKAZU TATSUOKA. "SYNTHESES OF NANOSTRUCTURE BUNDLES BASED ON SEMICONDUCTING METAL SILICIDES." Functional Materials Letters 06, no. 05 (October 2013): 1340011. http://dx.doi.org/10.1142/s1793604713400110.

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A variety of nanostructure bundles and arrays based on semiconducting metal silicides have been synthesized using abundant and non-toxic starting materials. Three types of fabrication techniques of the nanostructure bundles or arrays, including direct growth, template synthesis using natural nanostructured materials and template synthesis using artificially fabricated nanostructured materials are demonstrated. CrSi 2 nanowire bundles were directly grown by the exposure of Si substrates to CrCl 2 vapor at atmospheric pressure. A hexagonal MoSi 2 nanosheet, Mg 2 Si / MgO composite nanowire and Mg 2 Si nanowire bundles and MnSi 1.7 nanowire array were synthesized using a MoS 2 layered material, a SiO x nanofiber bundle, a Si nanowire array, and a Si nanowire array as the templates, respectively. Additionally, the fabrication phenomenon and structural properties of the nanostructured semiconducting metal silicides were investigated. These reactions provided the low-cost and controllable synthetic techniques to synthesize large scale and one-dimensional semiconducting metal silicides for thermoelectric applications.

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Erb, Denise J., Kai Schlage, and Ralf Röhlsberger. "Uniform metal nanostructures with long-range order via three-step hierarchical self-assembly." Science Advances 1, no. 10 (November 2015): e1500751. http://dx.doi.org/10.1126/sciadv.1500751.

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Large-scale nanopatterning is a major issue in nanoscience and nanotechnology, but conventional top-down approaches are challenging because of instrumentation and process complexity while often lacking the desired spatial resolution. We present a hierarchical bottom-up nanopatterning routine using exclusively self-assembly processes: By combining crystal surface reconstruction, microphase separation of copolymers, and selective metal diffusion, we produce monodisperse metal nanostructures in highly regular arrays covering areas of square centimeters. In situ grazing incidence small-angle x-ray scattering during Fe nanostructure formation evidences an outstanding structural order in the self-assembling system and hints at the possibility of sculpting nanostructures using external process parameters. Thus, we demonstrate that bottom-up nanopatterning is a competitive alternative to top-down routines, achieving comparable pattern regularity, feature size, and patterned areas with considerably reduced effort. Intriguing assets of the proposed fabrication approach include the option for in situ investigations during pattern formation, the possibility of customizing the nanostructure morphology, the capacity to pattern arbitrarily large areas with ultrahigh structure densities unachievable by top-down approaches, and the potential to address the nanostructures individually. Numerous applications of self-assembled nanostructure patterns can be envisioned, for example, in high-density magnetic data storage, in functional nanostructured materials for photonics or catalysis, or in surface plasmon resonance–based sensing.

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LIU, FEI, and DONGFENG XUE. "CHEMICAL DESIGN OF COMPLEX NANOSTRUCTURED METAL OXIDES IN SOLUTION." International Journal of Nanoscience 08, no. 06 (December 2009): 571–88. http://dx.doi.org/10.1142/s0219581x09006407.

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Nanostructured materials with controlled architectures are desirable for many applications, among which, metal oxides are especially important in optics, electronics, biology, catalysis, and energy conversions. Various chemical routes have been widely investigated for the synthesis of nanostructured metal oxide particles and films. More recently, deliberately designed chemical strategies have been used to produce particles and films composed of more complex crystal structures. In this paper, we discuss some recent progresses in the design of complex nanostructures through chemical routes, emphasize particularly on metal oxides. We first review some basic concepts involved in the fabrication of complex nanostructures, including crystal nucleation and growth, shape controlling and ripening process. We then describe more recent work on the use of different methods to synthesize a wide range of complex nanostructures, including hierarchical structures, heterostructures, as well as oriented nanowires and nanotubes. Such purposely built materials are designed, and engineered to match the physical, chemical, and structural requirements of their applications.

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Valero-Navarro, Angel, Jorge F. Fernandez-Sanchez, Antonio Segura-Carretero, Ursula E. Spichiger-Keller, Alberto Fernandez-Gutierrez, Pascual Oña, and Ignacio Fernandez. "Iron-phthalocyanine complexes immobilized in nanostructured metal oxide as optical sensors of NOx and CO: NMR and photophysical studies." Journal of Porphyrins and Phthalocyanines 13, no. 04n05 (April 2009): 616–23. http://dx.doi.org/10.1142/s1088424609000796.

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This paper presents the research that is currently undergoing in our group toward the development of optical sensing layers based on iron(II) phthalocyanine complexes immobilized on nanostructured solid supports. Several FePc - N donor ligands have been prepared and coated into different nanostructured metal oxides. Optical properties, chemical variables, analytical features, selectivity rates, response times and type of nanostructure supports have been evaluated; in some cases, interesting correlations between them have been deduced. In addition, thermostability studies have been carried out, providing access to a second generation of nanostructured metal oxides.

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Chen, Huige, Run Shi, and Tierui Zhang. "Nanostructured Photothermal Materials for Environmental and Catalytic Applications." Molecules 26, no. 24 (December 13, 2021): 7552. http://dx.doi.org/10.3390/molecules26247552.

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Solar energy is a green and sustainable clean energy source. Its rational use can alleviate the energy crisis and environmental pollution. Directly converting solar energy into heat energy is the most efficient method among all solar conversion strategies. Recently, various environmental and energy applications based on nanostructured photothermal materials stimulated the re-examination of the interfacial solar energy conversion process. The design of photothermal nanomaterials is demonstrated to be critical to promote the solar-to-heat energy conversion and the following physical and chemical processes. This review introduces the latest photothermal nanomaterials and their nanostructure modulation strategies for environmental (seawater evaporation) and catalytic (C1 conversion) applications. We present the research progress of photothermal seawater evaporation based on two-dimensional and three-dimensional porous materials. Then, we describe the progress of photothermal catalysis based on layered double hydroxide derived nanostructures, hydroxylated indium oxide nanostructures, and metal plasmonic nanostructures. Finally, we present our insights concerning the future development of this field.

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Dissertations / Theses on the topic "Nanostructured metal"

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Eskhult, Jonas. "Electrochemical Deposition of Nanostructured Metal/Metal-Oxide Coatings." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8186.

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Li, Li. "Versatile applications of nanostructured metal oxides." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/245303.

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This thesis explores applications of nanostructured metal oxides in photocatalysis, electrochromism and Raman spectroscopy. A variety of highly periodic nanoscale morphologies derived from block-copolymer self-assembly inspire the fabrication of well-ordered nanoporous metal oxide materials. Beginning with block-copolymer directed sol-gel chemistry, we have synthesized crystalline tungsten oxide consisting of micellar or cylindrical pores with uniform sizes. This porous structure reduced diffusion limitations of the reagents, allowing the easy access to a large surface area, therefore improving the photocatalytic activity compared to the non-structured material. This is followed by the fabrication of 3D highly interconnected gyroid-structured vanadium oxide via a simple, scalable and low cost replication strategy using a sacrificial polymer template derived from block-copolymer microphase separation. The electrochromic device fabricated using gyroid-structured vanadium oxide film showed significantly improved coloration responses, because the interconnected porous network greatly shortened the diffusion length of electrolyte ions. Then, the usage of metallic nanoparticles in enhanced Raman spectroscopy is explored. Au nanoparticles were employed as the Raman enhancer to probe the influence of interfacial reactions on the molecules adsorbed on a metal oxide (vanadium oxide) electrode. The spectral intensities and Raman shifts were found to be strongly dependent on the interfacial ion intercalation/extraction processes associated with the variations of the applied electric field. Next, the use of metal oxide nanoparticles in enhanced Raman spectroscopy is investigated. Metal oxide nanoparticles with high refractive indices when placed on top of metal surfaces can effectively enhance the Raman scattering field at the interface. This capability of Raman enhancement in combination with the range of functions of metal oxide nanoparticles opens up a novel approach to study the interfacial phenomena. Using this system, interfacial photocatalytic reactions of an organic dye catalyzed by titanium oxide nanoparticles were investigated by directly monitoring Raman scattering signals enhanced by the same nanoparticles. A diversion from metal oxides uses an Au nanoparticle on Au plane system as a surface- enhanced Raman scattering substrate. At the junction between an Au nanoparticle and an Au film, the electromagnetic field can be enhanced to an extent that single molecules can be detected. The use of such substrates to probe various molecules was also explored.

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Astuti, Yeni. "Bio-functionalised nanostructured metal oxide electrodes." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429459.

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Popov, M. Yu, A. P. Volkov, S. G. Buga, V. S. Bormashov, K. V. Kondrashov, R. L. Lomakin, N. V. Lyparev, V. V. Medvedev, S. A. Tarelkin, and S. A. Perfilov. "Nanostructured metal-fullerene field emission cathode." Thesis, Sumy State University, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20585.

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One of the important properties of carbon nanostructures is their cold electron emission ability. Carbon nanotubes and other nanostructures are capable of emitting high currents at relatively low electrical fields. They are already used in functional devices such as field emitters. The conventional method of carbon nanostructured cathodes manufacturing is thin film nanocarbon deposition using CVD process on electrically conducting substrate like metal or doped silicon plates. The alternative way of manufacturing of carbon field emission cathodes is based on a special processing of carbon microfibers or composite materials in metal holders. We used the similar approach to produce composite metal-nanocarbon material which may be easily processed and shaped to produce an effective field emission cathode which can be easily fixed an any environment. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20585

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杨纯臻 and Chunzhen Yang. "Metal/metal oxide nanoparticles supported on nanostructured carbons for electrochemical applications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/193414.

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Among various electrochemical devices that have been developed for energy storage and conversion, electric double layer capacitors (EDLCs) and direct methanol fuel cells (DMFC) have received much research attention. Nanostructured carbon materials have been playing an important role in the development of these devices, due to such characteristics as good electrical conductivity, high chemical stability, high surface area and large pore volumes and etc. In an EDLC, nanostructured carbon electrodes, possessing pores of varied length scales, can deliver electric energy at high current loadings. This kind of pore structure also benefits the deposition of metal catalysts and the transport of reactants and products in the methanol oxidation reaction. In order to systematically study the structural effects on the electrochemical capacitance and ionic transport, a series of three-dimensional hierarchical carbons with hollow core-mesoporous shell (HCMS) structure were template-synthesized. Periodically ordered macroscopic hollow cores of 330 nm in diameter were surrounded by a mesoporous shell containing uniform pores of 3.9 nm. The shell thickness was stepwise increased from 0, 25, 50 to 100 nm. The HCMS structure was modeled by a 5-level transmission line model to study the capacitance contribution from the pores at different length scale. Results revealed that the HCMS carbon with thicker mesoporous shells can provide high capacitance, while thinner shells could deliver high power output. A series of HCMS carbon sphere supported Pt nanoparticles were synthesized via the “Carbonization over Protected and Dispersed Metal” (CPDM) method. Contrary to the conventional “polyol” synthetic method, whereas most of Pt nanoparticles were deposited on the external surface of carbon spheres; the Pt nanoparticles synthesized via the CPDM method were found encapsulated in the mesoporous carbon shells and highly dispersed throughout the carbon texture. „Accelerated stress tests‟ (ASTs) were conducted to investigate the nanopores confinement effect toward the electrochemical stability of these Pt catalysts. Results revealed that (1) the nanopores confined Pt nanoparticles on HCMS carbon spheres exhibited a stable electrochemical active surface area (ECSA) and catalytic activity; and (2) thick mesoporous carbon shells could provide better protection over the Pt nanoparticles. This “CPDM” method was further extended to synthesize highly alloyed PtRu nanoparticles supported electrocatalysts. It is expected that this CPDM method can also be applied to synthesize other metal/metal oxide supported catalysts with stable electrochemical performance. WO3 has been demonstrated as a promsing co-catalyst for Pt in the methanol oxidation reaction (MOR). The synthesis of Pt-WO3/C catalyst with well-controlled nanoparticle size (2.5 nm) and composition was achieved via a microwave-assisted water-oil microemulsion reaction. Hydrogen adsorption, CO-stripping and Cu- stripping methods were used to estimate the ECSA of Pt in the Pt-WO3/C catalysts. Among these, Cu-stripping method was relatively more reliable due to the overlapping involvement of the WO3 component in the other methods. The methanol oxidation measurement shows that a 1:1 Pt:W ratio catalyst exhibits the highest Pt-mass current density of 271 mA mg-1-Pt, 1.4 times higher than that of commercial E-TEK catalyst.
published_or_final_version
Chemistry
Doctoral
Doctor of Philosophy

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Zuo, Yong. "Nanostructured Metal Sulfides for Electrochemical Energy Conversion." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/670925.

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Storing the fluctuating renewable energy into synthetic fuels or in batteries is meaningful due to the emerging energy crisis. In this thesis, four nanostructured catalysts based on two kinds of metal sulfides, namely Cu2S and SnS2, were produced and optimized to improve their performance towards three key electrochemical energy conversion processes, namely electrochemical oxygen evolution, photoelectrochemical water splitting and lithium-ion batteries. Chapter 1 presented a general introduction to explain the motivation of the thesis topic. In chapter 2, a metallic copper substrate was used as current collector and chemical template to produce Cu2S nanorod arrays for electrochemical oxygen evolution reaction (OER). Suitable characterization tools were applied to investigate the chemical, structural and morphological transformation in OER operation, during which the initial Cu2S nanorod arrays would perform as a “pre-catalyst” that in-situ changed to CuO nanowires. Notably, the Cu2S-derived CuO showed significant improved OER performance compared with that of CuO prepared by directly annealing a Cu(OH)2 precursor, in terms of both activity and stability. Thus obtained electrocatalyst can be ranked among the best Cu-based OER catalysts reported so far. To take advantage of the unlimited solar energy, an ultrathin SnS2 NPL with a suitable band gap around 2.2 eV was produced via a hot-injection solution-based process in chapter 3. The unsatisfied photoelectrochemical (PEC) performance of bare SnS2 motivated me to deposit Pt NPs on its surface as cocatalyst via in-situ reduction of a Pt salt. The resulting SnS2-Pt heterostructures with optimal Pt amount showed significant improvement (six fold) towards PEC water oxidation. Mott-Schottky analysis and PEC impedance spectroscopy (PEIS) were used to analyze in more detail the effect of Pt on the PEC performance. The optimal SnS2-Pt heterostructure presented acceptable performance towards PEC water splitting. However, it still suffered from a moderate stability due to the peel-off of the catalyst layer from the FTO surface. To solve this problem, in chapter 4 we detailed a simple, versatile and scalable amine/thiol- based molecular ink to grow nanostructured SnS2 layers directly on conductive substrates such as FTO, stainless steel and carbon cloth. Such layers on FTO were characterized by excellent photocurrent densities. The same strategy was used to produce SnS2-graphene composites, SnS2-xSex ternary coatings and even phase pure SnSe2 layers. Finally, the potential of this precursor ink to produce gram scale amounts of unsupported SnS2 was also investigated. Apart from the application as a photocatalyst, SnS2 can also be a promising anode material for Li-ion batteries (LIB). In chapter 5, nanostructured SnS2 with different morphologies produced in chapter 3 were tested as LIB anodes firstly to find that thin SnS2 NPLs provided the highest performance. Thereafter, a colloidal synthesis strategy to grow the same SnS2 NPLs within a matrix of porous g-C3N4 (CN) and graphite plates (GPs) was developed and the obtained materials were tested for LIB application. Such hierarchical SnS2/CN/GP composites using SnS2-NPL as active materials, porous CN to provide avenues for electrolyte diffusion and ease the volumetric expansion of SnS2, and GP as “highways” for charge transport displayed excellent rate capabilities (536.5 mAh g-1 at 2.0 A g-1) and an outstanding stability (~99.7 % retention after 400 cycles), which were partially associated with a high pseudocapacitance contribution (88.8 % at 1.0 mV s-1). The excellent electrochemical properties of these nanocomposites were ascribed to the synergy created between the three components. Overall, four nanostructured catalysts based on Cu2S and SnS2 were prepared, and proper optimizations/treatments were defined to improve their catalytic performance. The results shown in this thesis demonstrate the promising application of non-toxic, low cost metal sulfides in electrochemical energy conversion technologies.
En esta tesis, se produjeron y optimizaron cuatro catalizadores nanoestructurados basados en Cu2S y SnS2 para mejorar su rendimiento hacia la conversión de energía electroquímica. El Capítulo 1 presentó una introducción general para explicar la motivación del tema de tesis. En el capítulo 2, las matrices de las nanovarillas de Cu2S se sintetizaron in situ sobre un sustrato de cobre metálico para la reacción electroquímica de evolución de oxígeno (OER). Se aplicaron herramientas de caracterización adecuadas para investigar la transformación en la operación OER, durante la cual las matrices iniciales de las nanovarillas Cu2S in situ cambió a nanohilos de CuO. En particular, el CuO derivado de Cu2S mostró un rendimiento de OER significativamente mejor cuando comparado al de CuO preparado mediante el recocido. En el capítulo 3, se detalló un proceso basado en una solución de inyección en caliente para producir nanoplacas ultrafinas SnS2 (NPL). Posteriormente, se cultivóPt en su superficie mediante la reducción in situ de una sal de Pt. Posteriormente se probó el rendimiento fotoelectroquímico (PEC) de los fotoanodes hacia la oxidación del agua. Los fotoanodes de SnS2-Pt optimizados proporcionaron densidades de fotocorriente significativamente más altas que el SnS2 desnudo (seis veces). Se analizó el efecto de Pt. En el capítulo 4, se informó una tinta molecular simple para cultivar capas de SnS2 nanoestructuradas directamente sobre sustratos conductores. Tales capas nanoestructuradas en FTO se caracterizaron por excelentes densidades de fotocorriente. Se utilize la misma estrategia para producir compuestos de grafeno-SnS2, recubrimientos ternarios SnS2-xSex, capas de SnSe2 de fase pura e incluso polvo de SnS2 a gran escala. En el capítulo 5, el SnS2 nanoestructurado con diferentes morfologías se probaron como ánodos LIB en primer lugar para encontrar que los NPL de SnS2 delgados proporcionaban el mayor rendimiento. Posteriormente, se desarrolló una estrategia de síntesis coloidal para cultivar los mismos NPL de SnS2 dentro de una matriz de g-C3N4 (CN) poroso y placas de grafito (GP) y se probaron para la aplicación LIB. Tales compuestos jerárquicos SnS2/CN/GP mostraron excelentes propiedades electroquímicas, lo que se atribuye a la sinergia creada entre los tres componentes como se investigó.

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Paul, Blain. "Nanostructured metal oxides as adsorbents and photocatalysts." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/41758/1/Blain_Paul_Thesis.pdf.

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This research underlines the extensive application of nanostructured metal oxides in environmental systems such as hazardous waste remediation and water purification. This study tries to forge a new understanding of the complexity of adsorption and photocatalysis in the process of water treatment. Sodium niobate doped with a different amount of tantalum, was prepared via a hydrothermal reaction and was observed to be able to adsorb highly hazardous bivalent radioactive isotopes such as Sr2+ and Ra2+ions. This study facilitates the preparation of Nb-based adsorbents for efficiently removing toxic radioactive ions from contaminated water and also identifies the importance of understanding the influence of heterovalent substitution in microporous frameworks. Clay adsorbents were prepared via a two-step method to remove anionic and non-ionic herbicides from water. Firstly, layered beidellite clay was treated with acid in a hydrothermal process; secondly, common silane coupling agents, 3-chloro-propyl trimethoxysilane or triethoxy silane, were grafted onto the acid treated samples to prepare the adsorption materials. In order to isolate the effect of the clay surface, we compared the adsorption property of clay adsorbents with ƒ×-Al2O3 nanofibres grafted with the same functional groups. Thin alumina (£^-Al2O3) nanofibres were modified by the grafting of two organosilane agents 3-chloropropyltriethoxysilane and octyl triethoxysilane onto the surface, for the adsorptive removal of alachlor and imazaquin herbicides from water. The formation of organic groups during the functionalisation process established super hydrophobic sites along the surfaces and those non-polar regions of the surfaces were able to make close contact with the organic pollutants. A new structure of anatase crystals linked to clay fragments was synthesised by the reaction of TiOSO4 with laponite clay for the degradation of pesticides. Based on the Ti/clay ratio, these new catalysts showed a high degradation rate when compared with P25. Moreover, immobilized TiO2 on laponite clay fragments could be readily separated out from a slurry system after the photocatalytic reaction. Using a series of partial phase transition methods, an effective catalyst with fibril morphology was prepared for the degradation of different types of phenols and trace amount of herbicides from water. Both H-titanate and TiO2-(B) fibres coated with anatase nanocrystal were studied. When compared with a laponite clay photocatalyst, it was found that anatase dotted TiO2-(B) fibres prepared by a 45 h hydrothermal treatment followed by calcination were not only superior in performance in photocatalysis but could also be readily separated from a slurry system after photocatalytic reactions. This study has laid the foundation for the development of the ability to fabricate highly efficient nanostructured solids for the removal of radioactive ions and organic pollutants from contaminated water. These results now seem set to contribute to the development of advanced water purification devices in the future. These modified nanostructured materials with unusual properties have broadened their application range beyond their traditional use as adsorbents, to also encompass the storage of nuclear waste after concentrating from contaminated water.

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Gu, Yanjuan, and 谷艳娟. "Nanostructure of transition metal and metal oxide forelectrocatalysis." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37774396.

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Gu, Yanjuan. "Nanostructure of transition metal and metal oxide for electrocatalysis." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37774396.

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Cruickshank, Amy Clare. "Nanostructured Metal Electrodes for Wool Processing and Electroanalysis." Thesis, University of Canterbury. Chemistry, 2007. http://hdl.handle.net/10092/3853.

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The research presented in this thesis firstly concerns the use of electrochemical techniques to develop approaches to wool processing which have a lower impact on the environment than conventional chemical methods. Wool is a sulfur rich substrate and current methods used in wool processing often rely on sulfur-based reducing agents such as metabisulfite. However, due to increasing concern over the environmental impacts of metabisulfite, alternative methods are of interest. Electrochemical techniques have been applied to the process of wool setting in the presence of thiol setting agents. Wool disulfide bonds are reduced during this process and the thiol setting agent is converted to the disulfide. Efficient conversion of the disulfide back to the thiol setting agent would allow catalytic amounts of thiols to be used in wool setting. The electroreduction of cystine and 2-hydroxyethyl disulfide has been examined at a range of metal and carbon electrodes to find efficient methods of generating the corresponding thiols, cysteine and 2-mercaptoethanol respectively. Gold and silver were identified as the most efficient electrode materials. In industrial wool processing, the use of large-scale metal electrodes is expensive and therefore, high surface area gold and silver nanoparticle electrodes were fabricated by electrochemically depositing the metals onto low-cost carbon substrates. The most efficient electrochemical system for generating the thiol setting agent involved the electroreduction of cystine at the gold nanoparticle electrode and this system was used to successfully demonstrate that wool setting can be achieved using relatively low concentrations of cysteine. Further research was carried out to investigate methods for the controlled preparation of metal nanoparticle electrodes and their utility for detecting hydrogen peroxide was examined. A simple and versatile approach for the preparation of tethered gold nanoparticle assemblies was developed by exploiting electrostatic interactions between citrate-capped gold nanoparticles and amine tether layers attached to carbon surfaces. The nanoparticle assemblies were optimised for the detection of hydrogen peroxide by selecting the size and density of electrostatically assembled nanoparticles. The number of amine functionalities on the surface and the assembly conditions controlled the nanoparticle density. Nanostructured palladium electrodes fabricated using vapour deposition methods to immobilise palladium nanoparticles directly onto carbon substrates were also examined for the electroanalysis of hydrogen peroxide.

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Books on the topic "Nanostructured metal"

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Jayaraj, M. K., ed. Nanostructured Metal Oxides and Devices. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3314-3.

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Enrico, Traversa, ed. Nanostructured metal oxides: Processing and applications. Pennington, N.J: Electrochemical Society, 2006.

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Enrico, Traversa, ed. Nanostructured metal oxides: Processing and applications. Pennington, N.J: Electrochemical Society, 2006.

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Enrico, Traversa, ed. Nanostructured metal oxides: Processing and applications. Pennington, N.J: Electrochemical Society, 2006.

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Luigi, Nicolais, and Carotenuto Gianfranco, eds. Metal-polymer nanocomposites. Hoboken, N.J: Wiley-Interscience, 2005.

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Ama, Onoyivwe Monday, and Suprakas Sinha Ray, eds. Nanostructured Metal-Oxide Electrode Materials for Water Purification. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43346-8.

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Materials Research Society. Meeting. Symposium V, ed. Functional metal-oxide nanostructures: Symposium held April 14-17, San Francisco, California, U.S.A. Warrendale, Pa: Materials Research Society, 2009.

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International, Workshop on Clusters and Nanostructured Materials (1st 1996 Puri India). Clusters and nanostructured materials. Commack, N.Y: Nova Science Publishers, 1996.

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Nanostructured Anodic Metal Oxides. Elsevier, 2020. http://dx.doi.org/10.1016/c2017-0-04824-3.

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Properties of Metal Nanostructures. SPIE Society of Photo-Optical Instrumentation Engi, 2002.

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Book chapters on the topic "Nanostructured metal"

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McMahon, Jeffrey Michael. "Nanostructured Metal Films." In Topics in Theoretical and Computational Nanoscience, 83–111. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-8249-0_6.

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Mori, Kohsuke, and Hiromi Yamashita. "Silica-Supported Metal Complex Photocatalysts." In Nanostructured Photocatalysts, 465–77. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_26.

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Wen, Meicheng, Yasutaka Kuwahara, Kohsuke Mori, and Hiromi Yamashita. "Nanometal-Loaded Metal-Organic-Framework Photocatalysts." In Nanostructured Photocatalysts, 507–22. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_29.

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DebRoy, T., and H. K. D. H. Bhadeshia. "First Bulk Nanostructured Metal." In Innovations in Everyday Engineering Materials, 85–94. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57612-7_8.

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Sun, Dengrong, and Zhaohui Li. "Metal-Organic Frameworks (MOFs) for Photocatalytic Organic Transformations." In Nanostructured Photocatalysts, 523–35. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_30.

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Reedijk, Jan. "Macromolecular Metal Complexes in Biological Systems." In Macromolecular Nanostructured Materials, 244–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08439-7_15.

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Jaleh, Babak, Samira Naghdi, Nima Shahbazi, and Mahmoud Nasrollahzadeh. "Fabrication and Application of Graphene Oxide-based Metal and Metal Oxide Nanocomposites." In Advances in Nanostructured Composites, 25–52. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2018] | Series: Advances in nanostructured composites ; volume 2 | “A science publishers book.»: CRC Press, 2019. http://dx.doi.org/10.1201/9780429021718-2.

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Chandra Sekhar, S., Bhimanaboina Ramulu, and Jae Su Yu. "Transition Metal Oxides for Supercapacitors." In Nanostructured Materials for Supercapacitors, 267–92. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99302-3_13.

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Horiuchi, Yu, Takashi Toyao, and Masaya Matsuoka. "Metal–Organic Framework (MOF) and Porous Coordination Polymer (PCP)-Based Photocatalysts." In Nanostructured Photocatalysts, 479–89. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_27.

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Malvadkar, Niranjan A., Michael A. Ulizio, Jill Lowman, and Melik C. Demirel. "Functional Nanostructured Polymer–Metal Interfaces." In Virtual Testing and Predictive Modeling, 357–69. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-95924-5_12.

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Conference papers on the topic "Nanostructured metal"

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FRUTOS, Emilio, Miroslav KARLÍK, José Antonio JIMÉNEZ, and Tomáš POLCAR. "MICROSTRUCTURE AND MECHANICAL PROPERTIES OF NANOSTRUCTURED Ti-22Nb-10Zr COATINGS." In METAL 2020. TANGER Ltd., 2020. http://dx.doi.org/10.37904/metal.2020.3540.

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Kolesov, V., N. Petrova, A. Fionov, I. Dotsenko, and G. Yurkov. "Metal-Polymeric Nanostructured Materials." In 2006 16th International Crimean Microwave and Telecommunication Technology. IEEE, 2006. http://dx.doi.org/10.1109/crmico.2006.256154.

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Cabrera, Samuel, and Van P. Carey. "Exploration of ZnO Nanostructure Growth on Various Metal Substrates for Enhancement of Surface Wettability and Evaporation Processes." In ASME 2020 Heat Transfer Summer Conference collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ht2020-9114.

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Abstract:

Abstract Recent studies have indicated that ZnO superhydrophilic surfaces on copper and aluminum substrates enhance surface wettability and evaporation processes in droplet evaporation and pool boiling experiments. At slightly superheated surface temperatures, droplet evaporation on a nanoporous superhydrophilic surface exhibits onset of nucleation and nucleate boiling effects found in pool boiling processes. This study explores water droplet evaporation and quenching experiments conducted on nanostructured surfaces of a 45° downward facing pyramid copper, aluminum, and 304 stainless steel substrate. The nanostructured surfaces were used to conduct adiabatic droplet deposition, droplet evaporation, and quenching experiments. Through the three experiments and through surface characterization, by means of scanning electron microscopy, the underlying heat transfer performance and mechanism of droplet evaporation and pool boiling on various host metal substrates can be understood. The six surfaces tested were the following: bare copper, aluminum, and 304 stainless steel surfaces; and ZnO nanostructured surfaces on copper, aluminum, and 304 stainless steel. The experimental variables in this study were temperature and time. Through temperature and time measurements, the mean heat flux at varying superheats could be determined. Experimental results indicate the ZnO nanostructure enhances wettability and water evaporation on a variety of metal substrates. The presence of the ZnO nanostructure increases the mean heat flux and critical heat flux (CHF) in comparison to the bare metal surfaces. These results provide insight into the potential of enhancing spray cooling systems by growing a ZnO nanostructure on a heat exchanger fabricated of various metals.

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Singh, Rajendra K. "Acoustical characterization of nanostructured metal." In International Congress on Ultrasonics. Vienna University of Technology, 2007. http://dx.doi.org/10.3728/icultrasonics.2007.vienna.1021_singh.

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Oshikane, Yasushi. "Asymmetric metal-insulator-metal (MIM) structure formed by pulsed Nd:YAG laser deposition with titanium nitride (TiN) and aluminum nitride (AlN)." In Nanostructured Thin Films X, edited by Tom G. Mackay, Akhlesh Lakhtakia, and Yi-Jun Jen. SPIE, 2017. http://dx.doi.org/10.1117/12.2273483.

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Ayyub, Pushan. "Superhydrophobicity in hierarchically nanostructured metal surfaces." In Proceedings of the International Conference on Nanotechnology for Better Living. Singapore: Research Publishing Services, 2016. http://dx.doi.org/10.3850/978-981-09-7519-7nbl16-rps-242.

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Abdulhalim, Ibrahim. "Ultrahigh field enhancements from nanostructured metal thin films (Conference Presentation)." In Nanostructured Thin Films X, edited by Tom G. Mackay, Akhlesh Lakhtakia, and Yi-Jun Jen. SPIE, 2017. http://dx.doi.org/10.1117/12.2272143.

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Lapicki, Adam, Toni Barstis, Todd Engstrom, Erin Reichart, and Dennis Jacobs. "Cold-Cathode Electron Emission from Nanostructured Metal-Insulator-Metal Devices." In 41st Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-1050.

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Kiriakidis, G., D. Dovinos, and M. Suchea. "Sensing using nanostructured metal oxide thin films." In Optics East 2006, edited by Nibir K. Dhar, Achyut K. Dutta, and M. Saif Islam. SPIE, 2006. http://dx.doi.org/10.1117/12.685369.

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Elliott, J., G. Wurtz, R. Pollard, I. I. Smolyaninov, C. C. Davis, N. I. Zheludev, and A. V. Zayats. "Spectral analysis of periodically nanostructured metal surfaces." In OPTO-Ireland, edited by John G. McInerney, Gerard Farrell, David M. Denieffe, Liam P. Barry, Harold S. Gamble, Padraig J. Hughes, and Alan Moore. SPIE, 2005. http://dx.doi.org/10.1117/12.605415.

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Reports on the topic "Nanostructured metal"

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Craig E. Barnes. NANOSTRUCTURED METAL OXIDE CATALYSTS VIA BUILDING BLOCK SYNTHESES. Office of Scientific and Technical Information (OSTI), March 2013. http://dx.doi.org/10.2172/1067473.

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Liu, Li, and David Wayne Goodman. The physical and chemical properties of nanostructured mixed-metal catalysts. Office of Scientific and Technical Information (OSTI), April 2016. http://dx.doi.org/10.2172/1251398.

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Talu, Orhan, and Surendra N. Tewari. Sub-Nanostructured Non Transition Metal Complex Grids for Hydrogen Storage. Office of Scientific and Technical Information (OSTI), October 2007. http://dx.doi.org/10.2172/918886.

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Nastasi, Michael, Michael Demkowicz, Lin Shao, and Don Lucca. Radiation Tolerance and Mechanical Properties of Nanostructured Amorphous-Ceramic/Metal Composites. Office of Scientific and Technical Information (OSTI), October 2019. http://dx.doi.org/10.2172/1572151.

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Morris, John R. Adsorption and Decomposition of CWA Simulants on Single Crystal and Nanostructured Metal Oxides. Fort Belvoir, VA: Defense Technical Information Center, January 2009. http://dx.doi.org/10.21236/ada517975.

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Larsen, George K., Simona E. H. Murph, Lucas M. Angelette, and Kaitlin J. Lawrence. Final Report For PDRD SR16009: Durable Water Splitting Using Thermochemical Cycles Of Nanostructured Metal Oxides. Office of Scientific and Technical Information (OSTI), September 2018. http://dx.doi.org/10.2172/1512420.

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Nikolla, Eranda. Final Report: Nanostructured, Targeted Layered Metal Oxides as Active and Selective Heterogeneous Electrocatalysts for Oxygen Electrocatalysis. Office of Scientific and Technical Information (OSTI), January 2021. http://dx.doi.org/10.2172/1763600.

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Yang, Chih-Chung. Metal Nanostructures for Detection and Imaging Enhancements. Fort Belvoir, VA: Defense Technical Information Center, January 2011. http://dx.doi.org/10.21236/ada535765.

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McWatters, Bruce Ray, Rion A. Causey, Ryan J. DePuit, Nancy Y. C. Yang, and Markus D. Ong. Nanostructures from hydrogen implantation of metals. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/993629.

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Shelnutt, John A., Zhongchun Wang, and Craig J. Medforth. Growth of metal and semiconductor nanostructures using localized photocatalysts. Office of Scientific and Technical Information (OSTI), March 2006. http://dx.doi.org/10.2172/919279.

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