Adsorption behavior of thiadiazole derivatives as anticorrosion additives on copper oxide surface: Computational and experimental studies

2019 ◽  
Vol 492 ◽  
pp. 399-406 ◽  
Author(s):  
Sang Xiong ◽  
Dong Liang ◽  
Zhixin Ba ◽  
Zhen Zhang ◽  
Shuai Luo
Keyword(s):  
Copper Oxide ◽  
Experimental Studies ◽  
Adsorption Behavior ◽  
Oxide Surface ◽  
Thiadiazole Derivatives

X-ray photoelectron spectroscopy study of the interaction of methanol with polycrystalline copper oxide surface

1996 ◽  
Vol 11 (7) ◽  
pp. 1605-1608 ◽  
Author(s):  
S. Badrinarayanan ◽  
A. B. Mandale ◽  
S. R. Sainkar
Keyword(s):  
Copper Oxide ◽  
Photoelectron Spectroscopy ◽  
Low Dose ◽  
Dissociative Adsorption ◽  
Methanol Decomposition ◽  
Oxide Surface ◽  
Polycrystalline Copper ◽  
Spectroscopy Study ◽  
Methanol Vapor ◽  
X Ray

Methanol decomposition on a clean polycrystalline copper oxide surface was studied by x-ray photoelectron spectroscopy (XPS). Methanol was adsorbed at 133 K and desorbed over a broad temperature range. When CuO was exposed to a very low dose of methanol vapor, dissociative adsorption takes place, leading to the formation of CH3O and H2O. This is attributed to the presence of preadsorbed oxygen on the CuO surface.

ATR Spectroscopic Study of PMMA/PDMS Graft Copolymers Using a Barrier Layer Method

1995 ◽  
Vol 49 (4) ◽  
pp. 513-519 ◽  
Author(s):  
Eva Marand ◽  
L. Mike Smartt
Keyword(s):  
Thin Films ◽  
Copper Oxide ◽  
Spectroscopic Study ◽  
Penetration Depth ◽  
Barrier Layer ◽  
Graft Copolymers ◽  
Oxide Surface ◽  
Concentration Profiles ◽  
Oxide Interface ◽  
Layer Method

The use of an intermediate barrier layer to vary the penetration depth in an ATR experiment is investigated. Both theoretical and experimental results suggest that this method may be useful in probing concentration profiles away from the interface, particularly in the case of thin films, where variable-angle methods have limitations. Application of this technique in the study of poly(methylmethacrylate)/poly(dimethylsiloxane) (PMMA/PDMS) graft copolymers deposited onto a copper oxide surface indicates a preferential presence of the siloxane component at the oxide interface, a concentration which tends to decrease with increasing distance into the bulk of the sample film.

A computational exploration of CO2 reduction via CO dimerization on mixed-valence copper oxide surface

2018 ◽  
Vol 20 (25) ◽  
pp. 16906-16909 ◽  
Author(s):  
Chun-Chih Chang ◽  
Elise Y. Li ◽  
Ming-Kang Tsai
Keyword(s):  
Copper Oxide ◽  
Mixed Valence ◽  
Co2 Reduction ◽  
Electron Localization Function ◽  
Oxide Surface ◽  
Electron Localization ◽  
Localization Function ◽  
Computational Exploration

The electron-localization function plots of OCCO adsorbed on Ov–CuO(111), Ov–Cu4O3(202) and Cu2O(111) surfaces.

Investigation on the Use of Nanofluids to Enhance Heat Pipe Performance

Solar Energy ◽  
2005 ◽  
Author(s):  
Tomer Israeli ◽  
T. Agami Reddy ◽  
Young I. Cho
Keyword(s):  
Thermal Conductivity ◽  
Surface Tension ◽  
Thermal Resistance ◽  
Copper Oxide ◽  
Heat Pipe ◽  
Thermal Performance ◽  
Experimental Studies ◽  
Heat Pipes ◽  
Thermal Network ◽  
Overall Resistance

This paper reports on preliminary experimental results on using nanofluids to enhance the thermal performance of heat pipes. Our experience with preparing copper oxide (CuO) nanofluids is described. Contrary to earlier studies which report infinite shelf life, we found that nanofluid stability lasted for about three weeks only; an issue which merits further study. We have also conducted various experiments to measure the variation of thermal conductivity and surface tension with CuO nanofluid concentration. Actual experiments on nanofluid heat pipes were also performed which indicated an average 12.5% decrease in the overall thermal resistance of the heat pipe using nanofluid of 3% vol concentration. This observed improvement is fairly consistent with our predictions using a simple analytical thermal network model for heat pipe overall resistance and the measured nanofluid conductivity. The results, though encouraging, need more careful and elaborate experimental studies before the evidence can be deemed conclusive.

Modification of copper and copper oxide surface states due to isopropyl alcohol treatment toward area-selective processes

2021 ◽  
Vol 39 (1) ◽  
pp. 013403
Author(s):  
Takezo Mawaki ◽  
Akinobu Teramoto ◽  
Katsutoshi Ishii ◽  
Yoshinobu Shiba ◽  
Rihito Kuroda ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Isopropyl Alcohol ◽  
Surface States ◽  
Alcohol Treatment ◽  
Oxide Surface

scholarly journals Adsorption Behavior of Trace Beryllium (II) onto Metal Oxide Nanoparticles Dispersed in Water

2017 ◽  
Vol 9 (4) ◽  
pp. 62 ◽  
Author(s):  
Shoichi Katsuta ◽  
Naoki Kanaya ◽  
Kotaro Bessho ◽  
Hideaki Monjushiro
Keyword(s):  
Metal Oxide ◽  
Ph Dependence ◽  
Metal Oxide Nanoparticles ◽  
Cooling Water ◽  
High Energy ◽  
Adsorption Behavior ◽  
Oxide Surface ◽  
Oxide Nanoparticles ◽  
Hydroxyl Groups ◽  
Radioactive Trace

Radioactive trace 7Be produced in cooling water systems for high-energy accelerators is known to be captured by metal-oxide colloidal nanoparticles generated through corrosion of metal components in water. This study is aimed at investigating the adsorption behavior of trace Be2+ onto various oxide nanoparticles (Al2O3, SiO2, TiO2, Fe2O3, CoO, and CuO) dispersed in water at 25 °C in order to clarify the tendency and features of the interaction of Be2+ with metal oxides. From pH dependence of the distribution ratio of Be2+ between the nanoparticle phase and the aqueous solution phase, the surface complexation constants (βs,n) have been determined for the reaction of Be2+ with the hydroxyl groups on the oxide surface (>S−OH), i.e., Be2+ + n >S−OH ⇄ (>S−O)nBe(2−n)+ + n H+. The n values are generally 1 and 2 and the sequences of the βs,n values are Fe2O3 > TiO2 » Al2O3 > SiO2 for βs,1 and Fe2O3 > TiO2 > SiO2 > Al2O3 >> CoO » CuO for βs,2. The dependences of the the βs,n values on the kind of oxide are explained based on the electronegativity of the metal (or Si) composing the oxide.

Rheological properties of polymer chains at a copper oxide surface: Impact of the chain length, surface coverage, and grafted polymer shape

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
José G. Solano Canchaya ◽  
Germain Clavier ◽  
Sébastien Garruchet ◽  
Benoit Latour ◽  
Nicolas Martzel ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Rheological Properties ◽  
Chain Length ◽  
Surface Coverage ◽  
Polymer Chains ◽  
Oxide Surface ◽  
Grafted Polymer ◽  
Polymer Shape

Synthesis of Ceria-Coated Copper Oxide Particles for Direct Hydrocarbon SOFCs Anode

2006 ◽  
Vol 510-511 ◽  
pp. 1118-1121
Author(s):  
Jun Lee ◽  
Seung Hun Lee ◽  
Eun A Lee ◽  
Hae Jin Hwang
Keyword(s):  
Copper Oxide ◽  
Precursor Solution ◽  
Cerium Nitrate ◽  
Precipitation Method ◽  
Oxide Surface ◽  
Process Conditions ◽  
Nitrate Hexahydrate ◽  
Oxide Powders ◽  
Oxide Particles ◽  
20 Nm

Ceria-coated copper oxide powders were prepared by the precipitation method using cerium nitrate hexahydrate and ammonia as a precipitant. Heterogeneous nucleation and growth of ceria took place on the copper oxide surface by dispersing the copper oxide particles in cerium nitrate aqueous solution and subsequently adding ammonia into it. Process conditions such as the pH of the precursor solution and precipitation temperatures were carefully controlled for the homogeneous precipitation of ceria particles. It was found that copper oxide was homogeneously coated with nano-sized (~20 nm) ceria particles at room temperature. The morphology of ceria and ceria-coated copper oxide powder were examined by field-emission scanning electron microscopy (FE-SEM) as a function of precipitation temperature.

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