Soft-Chemical Synthesis and Electrochemical Characterization of Multicomponent Mn1–x–yCoxNiyO2 Nanostructures

Nanostructured Mn1–x–y CoxNiyO2 metal oxides are synthesized by one-pot hydrothermal reaction at low temperature. From powder X-ray diffraction and field emission-scanning electron microscopic analyses, it is found that the crystal structure and crystal morphology of the present materials are tunable by the control of the composition of precursor. 1D nanowires with α-MnO2-type structure are prepared with low substitution rate of Co and Ni, while the increase of substituent contents leads to the formation of δ-MnO2-structured 3D nanospheres consisting of 2D nanoplates. According to X-ray absorption near edge spectroscopy and chemical analyses, mixed valent CoIII/CoIV and divalent NiII ions are stabilized in the octahedral Mn sites of α-MnO2- and δ-MnO2-structures. The electrochemical measurements clearly demonstrate that the present nanostructured materials show promising electrode performances for lithium secondary batteries.

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X-ray diffraction and scanning electron microscopic characterization of electrolytically hydrogenated nickel and palladium

Journal of Alloys and Compounds ◽

10.1016/s0925-8388(02)00674-6 ◽

2002 ◽

Vol 347 (1-2) ◽

pp. 105-109 ◽

Cited By ~ 8

Author(s):

S.S.M Tavares ◽

S Miraglia ◽

D Fruchart ◽

D.S dos Santos

Keyword(s):

X Ray Diffraction ◽

Electron Microscopic ◽

X Ray ◽

Scanning Electron Microscopic ◽

Scanning Electron

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Observation and Characterization of Fragile Organometallic Molecules Encapsulated in Single-Wall Carbon Nanotubes

Journal of Nanomaterials ◽

10.1155/2014/539295 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5

Author(s):

Daisuke Ogawa ◽

Ryo Kitaura ◽

Takeshi Saito ◽

Shinobu Aoyagi ◽

Eiji Nishibori ◽

...

Keyword(s):

Carbon Nanotubes ◽

High Yield ◽

Single Wall Carbon Nanotubes ◽

X Ray Diffraction ◽

Single Wall Carbon ◽

X Ray ◽

Transmission Electron ◽

Organometallic Molecules ◽

X Ray Absorption

Thermally fragile tris(η5-cyclopentadienyl)erbium (ErCp3) molecules are encapsulated in single-wall carbon nanotubes (SWCNTs) with high yield. We realized the encapsulation of ErCp3with high filling ratio by using high quality SWCNTs at an optimized temperature under higher vacuum. Structure determination based on high-resolution transmission electron microscope observations together with the image simulations reveals the presence of almost free rotation of each ErCp3molecule in SWCNTs. The encapsulation is also confirmed by X-ray diffraction. Trivalent character of Er ions (i.e., Er3+) is confirmed by X-ray absorption spectrum.

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Preparation of Reswellable Amorphous Porous Celluloses through Hydrogelation from Ionic Liquid Solutions

Materials ◽

10.3390/ma12193249 ◽

2019 ◽

Vol 12 (19) ◽

pp. 3249 ◽

Cited By ~ 1

Author(s):

Satoshi Idenoue ◽

Yoshitaka Oga ◽

Daichi Hashimoto ◽

Kazuya Yamamoto ◽

Jun-ichi Kadokawa

Keyword(s):

Mechanical Properties ◽

Ionic Liquid ◽

Amorphous Structure ◽

X Ray Diffraction ◽

Electron Microscopic ◽

X Ray ◽

Liquid Solutions ◽

Scanning Electron Microscopic ◽

Porous Morphology ◽

Scanning Electron

In this study, we have performed the preparation of reswellable amorphous porous celluloses through regeneration from hydrogels. The cellulose hydrogels were first prepared from solutions with an ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl), in different concentrations. Lyophilization of the hydrogels efficiently produced the regenerated celluloses. The powder X-ray diffraction and scanning electron microscopic measurements of the products suggest an amorphous structure and porous morphology, respectively. Furthermore, the pore sizes of the regenerated celluloses, or in turn, the network sizes of cellulose chains in the hydrogels, were dependent on the concentrations of the initially prepared solutions with BMIMCl, which also affected the tensile mechanical properties. It was suggested that the dissolution states of the cellulose chains in the solutions were different, in accordance with the concentrations, which representatively dominated the pore and network sizes of the above materials. When the porous celluloses were immersed in water, reswelling was observed to regenerate the hydrogels.

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Tribocorrosion behavior of electroless Ni-P/Ni-B duplex coating on AA7075 aluminum alloy

Industrial Lubrication and Tribology ◽

10.1108/ilt-05-2018-0177 ◽

2019 ◽

Vol 71 (5) ◽

pp. 630-635 ◽

Cited By ~ 3

Author(s):

Harun Mindivan

Keyword(s):

Aluminum Alloy ◽

Surface Characterization ◽

X Ray Diffraction ◽

Electron Microscopic ◽

Content Type ◽

Duplex Coating ◽

Scanning Electron Microscopic ◽

Electroless Ni ◽

Insight Into

Purpose This paper aims to investigate the structural, corrosion and the study of tribocorrosion features of the AA7075 aluminum alloy with and without the application of electroless Ni-P/Ni-B duplex coating with a thickness of approximately 40 microns. Design/methodology/approach Surface characterization of the samples was made by structural surveys (light optic microscope, scanning electron microscopic examinations and X-ray diffraction analyses), hardness measurements, corrosion and tribocorrosion tests. Findings Results of the experiments showed that upper Ni-B coating deposited on the surface of first Ni-P layer by duplex treatment caused remarkable increment in the hardness, corrosion resistance and tribocorrosion performance as compared to the AA7075 aluminum alloy. Originality/value This study can be a practical reference and offers insight into the effects of duplex treating on the increase of hardness, corrosion and tribocorrosion performance.

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X-ray photoelectron spectroscopy, x-ray absorption spectroscopy, and x-ray diffraction characterization of CuO–TiO2–CeO2 catalyst system

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.1345911 ◽

2001 ◽

Vol 19 (4) ◽

pp. 1150-1157 ◽

Cited By ~ 15

Author(s):

M. S. P. Francisco ◽

P. A. P. Nascente ◽

V. R. Mastelaro ◽

A. O. Florentino

Keyword(s):

Absorption Spectroscopy ◽

Photoelectron Spectroscopy ◽

Catalyst System ◽

X Ray Diffraction ◽

X Ray ◽

X Ray Absorption

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Influence of the type of electrolyte on the morphological and crystallographic characteristics of lead powder particles

Journal of the Serbian Chemical Society ◽

10.2298/jsc130211034n ◽

2013 ◽

Vol 78 (9) ◽

pp. 1387-1395 ◽

Cited By ~ 11

Author(s):

Nebojsa Nikolic ◽

Vesna Maksimovic ◽

Goran Brankovic ◽

Predrag Zivkovic ◽

Miomir Pavlovic

Keyword(s):

X Ray Diffraction ◽

Electron Microscopic ◽

X Ray ◽

Lead Powder ◽

Scanning Electron Microscopic ◽

Crystallographic Characteristics ◽

Powder Particles ◽

Primary Type ◽

Secondary Type ◽

Scanning Electron

Lead electrodeposition processes from the basic (nitrate) and complex (acetate) electrolytes were mutually compared by the scanning electron microscopic and the X-ray diffraction analysis of the produced powder particles. The shape of dendritic particles strongly depended on the type of electrolyte. The dendrites composed of stalk and weakly developed primary branches (the primary type) were predominantly formed from the basic electrolyte. The ramified dendrites composed of stalk and of both primary and secondary branches (the secondary type) were mainly formed from the complex electrolyte. In the both type of powder particles Pb crystallites were predominantly oriented in the (111) plane. Formation of powder particles of the different shape with the strong (111) preferred orientation was discussed and explained by the consideration of the general characteristics of the growth of a crystal in the electrocrystallization processes.

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