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Laser ablation schematic for CNT synthesis

Chemical Vapor Deposition (CVD) schematic for CNT synthesis

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CNT Synthesis - Nanoscience Instruments

Abstract:
Inorganic fertilizers along with high yielding varieties have contributed immensely for success of green revolution. Increasing pressure towards food production globally demands unconscientious fertilizer usage in future as well. Nitrogenous fertilizers are the extensively used fertilizers but also suffer huge losses from agriculture ecosystem due to faster rate of release which is not synchronized with crop demand. Thus resulting in low nitrogen use efficiency. In order to have a sustained release of nitrogen from fertilizer, nanoparticle coated with urea is an effective option. We report urea coated hydroxyapatite based nanofertilizer and its performance on aerobic paddy. In this study hydroxyapatite (HA) nanoparticles were synthesized by adding orthophosphoric acid to calcium hydroxide solution under constant vigorous stirring. Saturated urea solution was added to the HA particle suspension and was stirred continuously for 12 hours for surface modification. The urea modified HA particles were washed and dried at 65ºC. Hydroxyapatite nanoparticles (HA) and urea coated hydroxyapatite nanoparticles (UHA) were characterized using Dynamic Light Scattering (DLS), Scanning Electron Microscope (SEM), Powder X-ray Diffraction (PXRD) and Fourier Transform Infrared (FTIR) Spectroscopy. Nitrogen content of UHA was analyzed using Kjeldahl method. Nitrogen content of UHA particles was found to be 36% and Zeta potential was 165.0 mV indicating stable nanodispersion. PXRD pattern of UHA particles indicated the presence of peaks due to hydroxyapatite and urea. SEM images of UHA particles exhibited oblong structures resembling rice grains with diameter less than 90 nm. FTIR spectroscopy showed prominent peaks around γmax/cm–1 1041 indicating phosphate group in hydroxyapatite and γmax/cm–1 3336 and 3432 indicating presence of urea. Synthesized nanofertilizer was evaluated on aerobic paddy under completely randomized design and was compared with recommended dose of conventional urea (100kgN/ha) in aerobic paddy. Nanofertilizer at 25% of recommended dose recorded highest grain yield. Nanofertilizer@ 50% dose showed similar performace to 100% dose of conventional urea. The results indicate amount of fertilizer application into soil can be reduced than regular dosage with nanofertilizer without affecting the yield. This will reduce environmental pollution of water and soil without compromising agricultural production.

Cnt Synthesis | Carbon Nanotube | X Ray Crystallography

Biography:
Dr. Catherine Dendrinou-Samara is Professor and Director of Inorganic Chemistry Lab., Faculty of Chemistry, Aristotle Univ. of Thessaloniki, GREECE. She obtained her PhD thesis in 1992 from Aristotle Univ. of Thessaloniki while she was visiting Researcher at Inorganic Chemistry Lab of Freie Universitaet Berlin and The Manchester University, UK. Her research interest are on synthesis and characterization of a variety of inorganic compounds and materials ranging from mononuclear complexes to polynuclear one and farther to nanoscale particles that permits to investigate magnetic properties and biomedical applications. She works on controlled synthesis through wet chemical approach of magnetic spinel ferrite nanoparticles for Imaging Diagnostics (MRI) and Therapeutics (Drug carriers, Hyperthermia); Bioactivity of Cu-based nanoparticles and Bimettallic nanostructures. She has an h-index of 30 for 80 indexed publications, with >2600 citations(Scopus).

Cnt Synthesis by Open Air Arc Discharge Method | …

fe-MCM-41 Catalyst for CNT synthesis - SlideShare

Biography:
Prof. Nana Zhao obtained her B. S. in Applied Chemistry in 2003 from Shandong University, and Ph.D. in Physical Chemistry in 2008 from Peking University. From 2008 to 2010, she worked as a Postdoc Fellow in Department of Polymer and Material Chemistry at the University of Toronto, Canada. After another two years’ post-doctoral work in Division of Materials Science at Lawrence Berkeley National Laboratory, she joined Beijing University of Chemical Technology in 2012. She has published over 20 publications in well-known international journals such as Chem. Soc. Rev., Angew. Chem. Int. Ed., Nano Lett., and Adv. Mater. et al. Prof. Zhao has her expertise in strategic design, controlled synthesis, and biomedical applications of organic/inorganic nanohybrids, including diagnosis of diseases, gene delivery, controlled drug-release, and imaging. Integrating the control over morphology, surface functionalization, and self-assembly strategies, the performance of nanohybrids could be improved further.

Biography:
Ms.T.S. Harshani Perera is a lecturer at the Faculty of Applied Sciences in Sabaragamuwa University of Sri Lanka. After the completion of her BSc degree in Applied Sciences at Sabaragamuwa University of Sri Lanka, she earned her Biomedical Engineering Master degree from the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing of the Wuhan University of Technology, Wuhan, P.R. China. Her dissertation is on Preparation and Surface Modification of Europium Doping Hydroxyapatite Luminescent Nanoparticles for Cell Labeling. Her main area of research is application of rare earth doped bioapatite nanoparticles for cell labeling.

Synthesis of CNT « Nanoelectronics Lab. (English Ver.)

Hydrothermal synthesis of MnO2/CNT nanocomposite with a CNT core/porous MnO2 sheath hierarchy architecture for supercapacitors N

Abstract:
Heterogeneous photo-catalysis is an advanced oxidation process (PAO), which has been the subject of numerous studies and applications, particularly using the commercial oxide of TiO2 (P25, Evonik). Zinc oxide (ZnO) has often been considered a valid alternative to TiO2 due to its good opto-electronic, catalytic and photochemical characteristics along with its low cost. In order to improve the photocatalytic performance of ZnO for practical applications, various types of synthetic approaches have been developed, including, among others, the hydrothermal / solvothermal growth method, sol-gel method, ultrasonic assisted method, deposition chemistry in vapor phase, etc. with the aim of preparing ZnO particles with different sizes and morphologies. However, all of these methods require relatively severe reaction conditions such as high temperature, sophisticated techniques, high purity of gases, adjustable gas flow, expensive raw materials, etc. Therefore, it is important to find a simple and cost-effective method for the synthesis of crystalline nano-particles of ZnO. For this reason, in the present work, the ZnO has been synthesized by three different procedures: conventional aqueous precipitation method, hydrothermal method (H) and microwave assisted method (MW). In all three processes, the same material is obtained, hydrocincite [Zn5(CO3) 2(OH)6], which evolves to crystalline ZnO after calcination thermal treatments. We investigated the effect of the calcination temperature, at the same time (2 h), on the optical, textural and structural properties. Photo-catalytic studies were performed using two selected substrates, Methyl Orange and Phenol, as toxic model substrates (one colorant and the other transparent). The catalysts prepared were characterized by several techniques: DRX, SBET, FE-SEM, TEM and UV-Vis (in diffuse reflectance mode).From the results of XRD, it has been possible to establish that a minimum difference between the relative intensities of exposed faces (I100 and I002) is a crucial factor to obtain good photocatalytic properties. This minimum difference is achieved, in our cases by thermal treatments of calcination at 400ºC, 2 h. When this temperature is chosen, there is no appreciable variation between the photocatalytic activities of the oxides of zinc obtained by the three processes, and there are small differences depending on the nature of the substrate chosen, which can be attributed to the textural differences between the oxides. In any case, the obtained zinc oxides show, for each substrate, photo-catalytic activities in the UV that are superior to those presented by the widely used commercial oxide TiO2 (P25) used as reference.

Abstract:
Heterogeneous photo-catalysis is an advanced oxidation process (PAO), which has been the subject of numerous studies and applications, particularly using the commercial oxide of TiO2 (P25, Evonik). Zinc oxide (ZnO) has often been considered a valid alternative to TiO2 due to its good opto-electronic, catalytic and photochemical characteristics along with its low cost. In order to improve the photocatalytic performance of ZnO for practical applications, various types of synthetic approaches have been developed, including, among others, the hydrothermal / solvothermal growth method, sol-gel method, ultrasonic assisted method, deposition chemistry in vapor phase, etc. with the aim of preparing ZnO particles with different sizes and morphologies. However, all of these methods require relatively severe reaction conditions such as high temperature, sophisticated techniques, high purity of gases, adjustable gas flow, expensive raw materials, etc. Therefore, it is important to find a simple and cost-effective method for the synthesis of crystalline nano-particles of ZnO. For this reason, in the present work, the ZnO has been synthesized by three different procedures: conventional aqueous precipitation method, hydrothermal method (H) and microwave assisted method (MW). In all three processes, the same material is obtained, hydrocincite [Zn5(CO3) 2(OH)6], which evolves to crystalline ZnO after calcination thermal treatments. We investigated the effect of the calcination temperature, at the same time (2 h), on the optical, textural and structural properties. Photo-catalytic studies were performed using two selected substrates, Methyl Orange and Phenol, as toxic model substrates (one colorant and the other transparent). The catalysts prepared were characterized by several techniques: DRX, SBET, FE-SEM, TEM and UV-Vis (in diffuse reflectance mode).From the results of XRD, it has been possible to establish that a minimum difference between the relative intensities of exposed faces (I100 and I002) is a crucial factor to obtain good photocatalytic properties. This minimum difference is achieved, in our cases by thermal treatments of calcination at 400ºC, 2 h. When this temperature is chosen, there is no appreciable variation between the photocatalytic activities of the oxides of zinc obtained by the three processes, and there are small differences depending on the nature of the substrate chosen, which can be attributed to the textural differences between the oxides. In any case, the obtained zinc oxides show, for each substrate, photo-catalytic activities in the UV that are superior to those presented by the widely used commercial oxide TiO2 (P25) used as reference.

Aiming to improve the dispersion of carbon nanotubes (CNT) in a polymer matrix, a fourth-generation Ziegler-Natta, ZN, catalyst was prepared in the presence of CNT to synthesize nanocomposites of polypropylene (PP/CNT) by in situ polymerization. The performance of the ZN catalyst was evaluated along
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  • Synthesis of carbon nanotubes - Wikipedia

    What are carbon nanotubes (CNT) and how are they made? Synthesis, physical properties, and applications are reviewed.

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    Carbon nanotube - Wikipedia

  • Methods for carbon nanotubes synthesis—review - …

    15/09/2009 · carbon nanotube synthesis by open air arc discharge

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A Review of Carbon Nanotube Synthesis via Fluidized …

Biography:
Mrs Shaista Taimur is a PhD scholar from Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences, Islamabad, Pakistan. Her PhD degree is in Materials Engineering (2017). She is scientifically skilled in polymeric nanohybrid composites synthesis and processing. Her reserach area and expertise are clay polymer nanocomposites (CPNs) synthesis and processing with special focus on chemical and radiation grafting, Organic-inorganic nanohybrids and their applications in toxic and precious metals removal and recovery and modification of nanoclay (sepiolite) for tailor made properties and applications. She has three international publications. She has teaching experience in different institutions of Pakistan.

A Review of Carbon Nanotube Synthesis via ..

Biography:
Dr. Naoufel Khemiri is an Assistant Professor at El Manar Preparatory Engineering Institute in Tunisia. He obtained his Ph.D thesis in “Condensed Matter Physics” from the Faculty of Sciences of Tunis (FST), University of Tunis El Manar, Tunisia in 2012. He is now member of Photovoltaic and Semiconductor Materials Laboratory (ENIT, Tunis, Tunisia). He works mainly on the synthesis and the characterization of ternary and quaternary compounds (CuInS2, Zn(S,O), SnSb4S7, Cu2ZnSnS4 and Cu2ZnxFe1-xSnS4) for opto-electronic and solar cell applications. He published more than 20 papers in International Journals with impact factor and participated in several international conferences in materials science.

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