Time-Dependent Growth of Hematiete (α-Fe2O3) Nanotube Arrays Produced by Iron Anodizing in Ethylene Glycol Solution

2012 ◽  
Vol 599 ◽  
pp. 145-150 ◽  
Author(s):  
Gao Yue ◽  
Hong Wei Ni ◽  
Rong Sheng Chen ◽  
You Wei Li ◽  
Ji Hui Li
Keyword(s):  
Ethylene Glycol ◽  
Photocatalytic Performance ◽  
Pore Diameter ◽  
Grazing Incidence ◽  
Nanotube Arrays ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dependent Growth ◽  
Glycol Solution ◽  
Absorbance Spectra

Hematiete (α-Fe2O3) nanotube arrays (NTAs) were prepared on the iron foil by the anodization method in an ethylene glycol electrolyte containing NH4F and deionized water. The α-Fe2O3 NTAs electrodes were characterized by field-emission scanning electron microscopy, grazing incidence X-ray diffraction and UV-vis absorbance spectra. As the anodization processed, the morphology of the foil transformed from nanoporous to nanotube arrays.The resulting α-Fe2O3 NTAs showed a pore diameter of 40 nm, thickness of 1.5 μm, and a minimum wall thickness of 10 nm. The photocatalytic activity of the α-Fe2O3 NTAs was evaluated by degradation of azo dye. The significant photocatalytic performance indicated that the α-Fe2O3 NTAs were an effective photocatalyst to decompose organic pollutants.

GISAXS and TOF-GISANS studies on surface and depth morphology of self-organized TiO2nanotube arrays: model anode material in Li-ion batteries

2015 ◽  
Vol 48 (2) ◽  
pp. 444-454 ◽  
Author(s):  
Neelima Paul ◽  
Jassen Brumbarov ◽  
Amitesh Paul ◽  
Ying Chen ◽  
Jean-Francois Moulin ◽  
...  
Keyword(s):  
Anode Material ◽  
Small Angle ◽  
Grazing Incidence ◽  
Nanotube Arrays ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray ◽  
Self Organized ◽  
Li Ion ◽  
Silicon Coating

Self-organized anodic titania (TiO2) nanotube arrays are an interesting model anode material for use in Li-ion batteries owing to their excellent rate capability, their cycling stability and their enhanced safety compared to graphite. A composite material where carbothermally treated conductive TiO2nanotubes are used as support for a thin silicon film has been shown to have the additional advantage of high lithium storage capacity. This article presents a detailed comparison of the structure, surface and bulk morphology of self-organized conductive TiO2nanotube arrays, with and without silicon coating, using a combination of X-ray diffraction, X-ray reflectivity, grazing-incidence small-angle X-ray scattering (GISAXS) and time-of-flight grazing-incidence small-angle neutron scattering (TOF-GISANS) techniques. X-ray diffraction shows that the nanotubes crystallize in the anatase structure with a preferred (004) orientation. GISAXS and TOF-GISANS are used to study the morphology of the nanotube arrays, delivering values for the inner nanotube radius and intertubular distances with high statistical relevance because of the large probed volume. The analyses reveal the distinct signatures of a prominent lateral correlation of the TiO2nanotubes of ∼94 nm and a nanotube radius of ∼46 nm. The porosity averaged over the entire film using TOF-GISANS is 46%. The inner nanotube radius is reduced to half (∼23 nm) through the silicon coating, but the prominent lateral structure is preserved. Such in-depth morphological investigations over large sample volumes are useful towards development of more efficient battery electrode morphologies.

scholarly journals Electrodeposition and Growth of Iron from an Ethylene Glycol Solution

2021 ◽  
Vol 68 (1) ◽  
pp. 185-192
Author(s):  
Vusala Asim Majidzade ◽  
Akif Shikhan Aliyev ◽  
Mahmoud Elrouby ◽  
Dunya Mahammad Babanly ◽  
Dilgam Babir Tagiyev
Keyword(s):  
Ethylene Glycol ◽  
Effective Activation Energy ◽  
Sweep Rate ◽  
Potential Sweep Rate ◽  
X Ray Diffraction ◽  
Potential Sweep ◽  
X Ray ◽  
Reduction Of Iron ◽  
Glycol Solution ◽  
Optimized Conditions

The electrochemical reduction of iron (III) ions into zero-valent iron from a solution of ethylene glycol was accomplished. The kinetics and mechanism of the electroreduction process were investigated by cyclic and linear polarization techniques. The influence of temperature, potential sweep rate, and concentration of iron (III) ions on the electroreduction process was also studied. The observed values of effective activation energy revealed that the investigated electroreduction process is accompanied by mixed kinetics control. Moreover, the results of SEM and X-ray diffraction analysis confirmed the deposition of thin Fe films under the optimized conditions.

Electrolyte Influence on the Morphologies of Anodic ZrO2 Nanotube Arrays Formed by Anodization

2014 ◽  
Vol 1024 ◽  
pp. 104-107
Author(s):  
Syahriza Ismail ◽  
Monna Rozana ◽  
Dede Miftahul Anwar ◽  
Go Kawamura ◽  
Atsunori Matsuda ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Diffraction Pattern ◽  
Nanotube Arrays ◽  
X Ray Diffraction ◽  
X Ray

Self-aligned ZrO2 nanotube (ZNT) arrays were produced by anodization of Zr in aqueous sulphate/fluoride and ethylene glycol (EG)/fluoride electrolytes. The morphologies of the oxide produced were compared. It appears that the nanotubes formed in EG/fluoride are clearer showing smoother walls indicating better cell boundaries separation in this electrolyte. They are also longer with length > 10 µm after 1 hour of anodization. The x-ray diffraction pattern of the ZNTs revealed that ZNTs are cubic oxide.

New Structure of CTAB Templated Silica Films as revealed by GISAXS coupled to HRTEM

2000 ◽  
Vol 628 ◽  
Author(s):  
Sophie Besson ◽  
Catherine Jacquiod ◽  
Thierry Gacoin ◽  
André Naudon ◽  
Christian Ricolleau ◽  
...  
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Grazing Incidence ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
Electronic Microscopy ◽  
Silica Films ◽  
X Ray ◽  
X Ray Scattering ◽  
Hexagonal Arrangement ◽  
Spherical Micelles

ABSTRACTA microstructural study on surfactant templated silica films is performed by coupling traditional X-Ray Diffraction (XRD) and Transmission Electronic Microscopy (TEM) to Grazing Incidence Small Angle X-Ray Scattering (GISAXS). By this method it is shown that spin-coating of silicate solutions with cationic surfactant cetyltrimethylammonium bromide (CTAB) as a templating agent provides 3D hexagonal structure (space group P63/mmc) that is no longer compatible with the often described hexagonal arrangement of tubular micelles but rather with an hexagonal arrangement of spherical micelles. The extent of the hexagonal ordering and the texture can be optimized in films by varying the composition of the solution.

Simplistic Synthesis and Enhanced Photocatalytic Performance of Spherical ZnO Nanoparticles Prepared from Arabinose Solution

2019 ◽  
Vol 74 (10) ◽  
pp. 937-944 ◽  
Author(s):  
Babiker Y. Abdulkhair ◽  
Mutaz E. Salih ◽  
Nuha Y. Elamin ◽  
A. MA. Fatima ◽  
A. Modwi
Keyword(s):  
Zno Nanoparticles ◽  
Photocatalytic Performance ◽  
Hexagonal Wurtzite Structure ◽  
Zinc Nitrate ◽  
Wurtzite Structure ◽  
Sugar Solution ◽  
X Ray Diffraction ◽  
Pollutant Degradation ◽  
X Ray ◽  
Good Crystallinity

AbstractStrenuous efforts have been employed to prepare zinc oxide (ZnO) with eco-friendly methods; however, few studies have reported the fabrication of ZnO using a sustainable procedure. In this study, spherical ZnO nanoparticles were successfully fabricated for photocatalysis applications using a simple and eco-friendly method using an arabinose sugar solution. The ZnO nanoparticles with a wurtzite structure were obtained by combining zinc nitrate and arabinose in water, followed by heating, evaporation, and calcinations at different annealing temperatures. The annealed ZnO photocatalysts were characterised via X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The findings revealed a hexagonal wurtzite structure and good crystallinity with crystallite size increasing from 18 to 31 nm by means of an increase in the annealing temperature. The photocatalytic performance was examined to determine the degradation of mix dye waste. The spherical ZnO nanoparticles showed mix pollutant degradation of 84 % in 25 min at 400 °C.

scholarly journals The study of rod-shaped TiO2 composite material in the protection of stone cultural relics

2020 ◽  
Vol 9 (1) ◽  
pp. 359-365
Author(s):  
Hui Shu ◽  
Yujian Song ◽  
Qiang Liu ◽  
Maobin Luo
Keyword(s):  
Photocatalytic Performance ◽  
Acid Resistance ◽  
Uv Resistance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Morphology ◽  
Excellent Photocatalytic Activity ◽  
Stone Culture ◽  
Weather Resistance ◽  
Cultural Relics

AbstractTiO2 has many advantages, such as UV resistance, thermal stability, and antibacterial; the attention toward TiO2 composite materials (TCMs) is rapidly increasing in the protection of stone culture relics. An innovative rod-shaped TCM was synthesized in this study. The structure and morphology of TCM were studied by X-ray diffraction and scanning electron microscopy. The acid resistance, weather resistance, hydrophilicity, and photocatalytic performance of TCM had been investigated. The experimental results indicated that TCM has good protection effects. The stone sample treated with TCM has stronger acid resistance and weather resistance, better hydrophilicity, and more excellent photocatalytic activity compared with the untreated stone. More importantly, the stone treated with TCM has better acid resistance and weather resistance than that treated with normal shaped TiO2 materials of the previous study. This work describes an effective way to protect stone cultural relics.

scholarly journals Surface Stoichiometry and Depth Profile of Tix-CuyNz Thin Films Deposited by Magnetron Sputtering

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3191
Author(s):  
Arun Kumar Mukhopadhyay ◽  
Avishek Roy ◽  
Gourab Bhattacharjee ◽  
Sadhan Chandra Das ◽  
Abhijit Majumdar ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Photoelectron Spectroscopy ◽  
Film Surface ◽  
Grazing Incidence ◽  
X Ray Diffraction ◽  
X Ray ◽  
Relative Composition ◽  
Transmission Electron ◽  
Deposited Film ◽  
Deposited Films

We report the surface stoichiometry of Tix-CuyNz thin film as a function of film depth. Films are deposited by high power impulse (HiPIMS) and DC magnetron sputtering (DCMS). The composition of Ti, Cu, and N in the deposited film is investigated by X-ray photoelectron spectroscopy (XPS). At a larger depth, the relative composition of Cu and Ti in the film is increased compared to the surface. The amount of adventitious carbon which is present on the film surface strongly decreases with film depth. Deposited films also contain a significant amount of oxygen whose origin is not fully clear. Grazing incidence X-ray diffraction (GIXD) shows a Cu3N phase on the surface, while transmission electron microscopy (TEM) indicates a polycrystalline structure and the presence of a Ti3CuN phase.

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