Effect of the Configuration of Copper Oxide–Ceria Catalysts in NO Reduction with CO: Superior Performance of a Copper–Ceria Solid Solution

2021 ◽  
Author(s):  
Yuhang Wang ◽  
Qike Jiang ◽  
Liangliang Xu ◽  
Zhong-Kang Han ◽  
Song Guo ◽  
...  
Keyword(s):  
Solid Solution ◽  
Copper Oxide ◽  
No Reduction ◽  
Superior Performance ◽  
Ceria Catalysts

Zinc Oxide and Copper Oxide Nanostructures: Fundamentals and Applications

2012 ◽  
Vol 1406 ◽  
Author(s):  
Magnus Willander ◽  
Omer Nur ◽  
Gul Amin ◽  
A. Zainelabdin ◽  
S. Zaman
Keyword(s):  
Zinc Oxide ◽  
Copper Oxide ◽  
Light Emitting Diodes ◽  
Zno Nanorods ◽  
Superior Performance ◽  
Zno Nanostructures ◽  
Large Area ◽  
Light Emitting ◽  
Sensing Applications ◽  
Quality Material

ABSTRACTCopper oxide (CuO) and zinc oxide (ZnO) nanostructures complement each other since CuO is unintentional p-type and ZnO unintentional n-type. Using the low temperature chemical growth approach, the effect on morphology of varying the pH of the grown ZnO nanostructures and CuO micro structures is monitored. For both materials the variation of the pH was found to lead to a large variation on the morphology achieved. The grown ZnO NRs and CuO micro flowers material were used to fabricate devices. We demonstrate results from ZnO nanorods (NRs)/polymer p-n hybrid heterojunctions chemically grown on paper and using a process on paper for light emitting diodes (LEDs) applications as well as some large area light emitting diodes LEDs. The growth of CuO micro flowers indicated good quality material for sensing applications. The grown CuO micro flowers were employed as pH sensors. The results indicated a superior performance as expect due to the catalytic properties of this material.

Dispersion, reduction and catalytic properties of copper oxide supported on Ce0.5Zr0.5O2 solid solution

2006 ◽  
Vol 255 (1-2) ◽  
pp. 254-259 ◽  
Author(s):  
Hongliang Chen ◽  
Haiyang Zhu ◽  
Yong Wu ◽  
Fei Gao ◽  
Lin Dong ◽  
...  
Keyword(s):  
Solid Solution ◽  
Copper Oxide ◽  
Catalytic Properties

A Green Strategy to Synthesize and Characterization of CuO Nanoparticles for Antimicrobial Applications

2021 ◽  
Vol 9 (VI) ◽  
pp. 4465-4468
Author(s):  
S. D. Chavan
Keyword(s):  
Antibacterial Activity ◽  
Copper Oxide ◽  
Moringa Oleifera ◽  
Antimicrobial Agents ◽  
Copper Oxide Nanoparticles ◽  
Advanced Technology ◽  
Superior Performance ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Green Strategy

Green synthesis of nanoparticles is the recent and advanced technology in the fields of nanoscience and biotechnology which produces the eco-friendly and more efficient antimicrobial agents. Therefore, present study reported a simple, suitable and cost effective method of preparation of bioactive antimicrobial agents by the green strategy of copper oxide nanoparticles with Moringa oleifera through a green route method. In this green process the vital and varsatile medicinal quality plant i.e., Moringa oleifera leaves extract as a reducing agent as well as stabilizing agent were used to prepare the copper oxide nanoparticles. The synthesized copper oxide nanoparticles were characterized by UV- Vis, SEM, and TEM techniques. The antibacterial activity of the samples were tested by disc diffusion method against gram positive bacteria (S.aureus), gram negative bacteria (E.coli ). The size of synthesized copper oxide nanoparticles was in the ranges around 60-100 nm with dot and spherical shaped morphology. The antimicrobial activities of biofunctionalized copper oxide nanoparticles were observed significant inhibition activity. From this analysis, the green synthesized biofunctionalization method what we have suggested is exposed assure results in the antibacterial activity tests. Moreover, biofunctionalized copper oxide nanoparticles are shown superior performance in the opposed to of microbes.

NO reduction with NH3 over an activated carbon-supported copper oxide catalysts at low temperatures

2000 ◽  
Vol 26 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Zhenping Zhu ◽  
Zhenyu Liu ◽  
Shoujun Liu ◽  
Hongxian Niu ◽  
Tiandon Hu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Copper Oxide ◽  
Low Temperatures ◽  
No Reduction ◽  
Oxide Catalysts

NiAl precipitation in Fe-12w/o Cr-5w/o Ni-4w/o Al

1983 ◽  
Vol 41 ◽  
pp. 202-203
Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Chromium Content ◽  
Scale Up ◽  
Optical Metallography ◽  
Property Evaluation ◽  
310 Stainless Steel ◽  
Microstructural Studies

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.

Solid Solution Effects and Deformation Micros trueture of Shock-Loaded Iron Manganese Alloys

1970 ◽  
Vol 28 ◽  
pp. 420-421
Author(s):  
A. Christou ◽  
J. V. Foltz ◽  
N. Brown
Keyword(s):  
Solid Solution ◽  
Shock Loading ◽  
High Strain ◽  
Local Stress ◽  
Strain Rates ◽  
Local Stress Concentration ◽  
Bcc Metals ◽  
Manganese Alloys ◽  
Iron Manganese ◽  
Transmission Microscope

In general, all BCC transition metals have been observed to twin under appropriate conditions. At the present time various experimental reports of solid solution effects on BCC metals have been made. Indications are that solid solution effects are important in the formation of twins. The formation of twins in metals and alloys may be explained in terms of dislocation mechanisms. It has been suggested that twins are nucleated by the achievement of local stress-concentration of the order of 15 to 45 times the applied stress. Prietner and Leslie have found that twins in BCC metals are nucleated at intersections of (110) and (112) or (112) and (112) type of planes.In this paper, observations are reported of a transmission microscope study of the iron manganese series under conditions in which twins both were and were not formed. High strain rates produced by shock loading provided the appropriate deformation conditions. The workhardening mechanisms of one alloy (Fe - 7.37 wt% Mn) were studied in detail.

Fine Microstructure of a Mechanically Alloyed Oxide Dispersion Strengthened Nickel-Base Superalloy

1977 ◽  
Vol 35 ◽  
pp. 298-299
Author(s):  
Jordi Marti ◽  
Timothy E. Howson ◽  
David Kratz ◽  
John K. Tien
Keyword(s):  
Solid Solution ◽  
Volume Fraction ◽  
Stress Rupture ◽  
Oxide Dispersion Strengthened ◽  
Solid Solution Alloy ◽  
Oxide Dispersion ◽  
Creep And Stress Rupture ◽  
Mechanically Alloyed ◽  
Fine Microstructure ◽  
Nickel Base

The previous paper briefly described the fine microstructure of a mechanically alloyed oxide dispersion strengthened nickel-base solid solution. This note examines the fine microstructure of another mechanically alloyed system. This alloy differs from the one described previously in that it is more generously endowed with coherent precipitate γ forming elements A1 and Ti and it contains a higher volume fraction of the finely dispersed Y2O3 oxide. An interesting question to answer in the comparative study of the creep and stress rupture of these two ODS systems is the role of the precipitate γ' in the mechanisms of creep and stress rupture in alloys already containing oxide dispersoids.The nominal chemical composition of this alloy is Ni - 20%Cr - 2.5%Ti - 1.5% A1 - 1.3%Y203 by weight. The system receives a three stage heat treatment-- the first designed to produce a coarse grain structure similar to the solid solution alloy but with a smaller grain aspect ratio of about ten.

The Precipitation of Si in AlCuSi Thin Films

1973 ◽  
Vol 31 ◽  
pp. 34-35 ◽  
Author(s):  
R. M. Anderson
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Heat Treatment ◽  
Solid Solution ◽  
Integrated Circuit ◽  
Copper Film ◽  
Solution Concentration ◽  
X Ray ◽  
Silicon Thin Films ◽  
Before And After

Aluminum-copper-silicon thin films have been considered as an interconnection metallurgy for integrated circuit applications. Various schemes have been proposed to incorporate small percent-ages of silicon into films that typically contain two to five percent copper. We undertook a study of the total effect of silicon on the aluminum copper film as revealed by transmission electron microscopy, scanning electron microscopy, x-ray diffraction and ion microprobe techniques as a function of the various deposition methods.X-ray investigations noted a change in solid solution concentration as a function of Si content before and after heat-treatment. The amount of solid solution in the Al increased with heat-treatment for films with ≥2% silicon and decreased for films <2% silicon.

Precipitation in Al + 4% Cu Epitaxial Films

1968 ◽  
Vol 26 ◽  
pp. 384-385
Author(s):  
S. Herd ◽  
S. M. Mader
Keyword(s):  
Solid Solution ◽  
Bulk Material ◽  
Epitaxial Films ◽  
Detectable Change ◽  
Cu Films ◽  
Solution Treated ◽  
Single Crystal Films ◽  
Crystal Films ◽  
Diffraction Patterns ◽  
Deposited Films

Single crystal films in (001) orientation, about 1500 Å thick, were produced by R-F sputtering of Al + 4 wt % Cu onto cleaved KCl at 150°C substrate temperature. The as-deposited films contained numerous θ-CuAl2 particles (C16 structure) about 0.1μ in size. They were transferred onto Mo screens, solution treated and rapidly cooled (within about ½ min) so as to retain a homogeneous solid solution. Subsequently, the films were aged in vacuum at various temperatures in order to induce precipitation and to compare structures and morphologies of precipitate particles in Al-Cu films with those found in age hardened bulk material.Aging for 3 weeks at 60°C or 48 hrs at 100°C did not produce any detectable change in high resolution micrographs or diffraction patterns. In this range Guinier-Preston zones (GP) form in quenched bulk material. The absence of GP in the present experiments in this aging range is perhaps due to the cooling rate employed, which might be more equivalent to an aged and reverted bulk material than to a quenched one.

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