Copper oxidation state in chalcopyrite: Mixed Cu d9 and d10 characteristics

2006 ◽  
Vol 70 (18) ◽  
pp. 4635-4642 ◽  
Author(s):  
C.I. Pearce ◽  
R.A.D. Pattrick ◽  
D.J. Vaughan ◽  
C.M.B. Henderson ◽  
G. van der Laan
Keyword(s):  
Oxidation State ◽  
Copper Oxidation

scholarly journals Preparation and Identification of Optimal Synthesis Conditions for a Novel Alkaline Anion-Exchange Membrane

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 913 ◽  
Author(s):  
Aitor Marcos-Madrazo ◽  
Clara Casado-Coterillo ◽  
Leticia García-Cruz ◽  
Jesús Iniesta ◽  
Laura Simonelli ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Oxidation State ◽  
Water Vapor Permeability ◽  
Filler Loading ◽  
Poly Vinyl Alcohol ◽  
Vapor Permeability ◽  
Mechanical Resistance ◽  
Anion Exchange Membranes ◽  
Copper Oxidation ◽  
Synthesis Conditions

The physicochemical and mechanical properties of new alkaline anion-exchange membranes (AAEMs) based on chitosan (CS) and poly(vinyl alcohol) (PVA) polymers doped with unsupported copper nanoparticles (NPs) and copper exchanged over different porous materials were investigated regarding ion-exchange capacity (IEC), OH− conductivity, water uptake (WU), water vapor permeability (WVP), and thermal and mechanical resistance. The influence of the type of filler included in different morphologies and filler loading has been explored using copper exchanged materials such as the layered porous titanosilicate AM-4, layered stannosilicate UZAR-S3, and zeolites Y, MOR, and BEA. Compared to commercially available anion-exchange membranes, the best performing membranes in terms of WU, IEC, OH− conductivity and WVP in this study were those containing 10 wt % of Cu-AM-4 and Cu-UZAR-S3, although 10 wt % Cu-MOR provided better mechanical strength at close values of WVP and anion conductivity. It was also observed that when Cu was exchanged in a porous silicate matrix, its oxidation state was lower than when embedded as unsupported metal NPs. In addition, the statistical analysis of variance determined that the electrochemical properties of the membranes were noticeably affected by both the type and filler loading, and influenced also by the copper oxidation state and content in the membrane, but their hydrophilic properties were more affected by the polymers. The largest significant effects were noticed on the water sorption and transport properties, which gives scope for the design of AAEMs for electrochemical and water treatment applications.

Nano-Sized Copper (Oxide) on Alumina Granules for Water Filtration: Effect of Copper Oxidation State on Virus Removal Performance

2019 ◽  
Vol 54 (2) ◽  
pp. 1214-1222 ◽  
Author(s):  
Julia M. Mazurkow ◽  
Nur Sena Yüzbasi ◽  
Kamila W. Domagala ◽  
Stefan Pfeiffer ◽  
Dariusz Kata ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Oxidation State ◽  
Water Filtration ◽  
Copper Oxidation ◽  
Virus Removal ◽  
Filtration Effect ◽  
Effect Of Copper

scholarly journals The Role of the Copper Oxidation State in the Electrocatalytic Reduction of CO2 into Valuable Hydrocarbons

2018 ◽  
Vol 7 (1) ◽  
pp. 1485-1492 ◽  
Author(s):  
Juan-Jesús Velasco-Vélez ◽  
Travis Jones ◽  
Dunfeng Gao ◽  
Emilia Carbonio ◽  
Rosa Arrigo ◽  
...  
Keyword(s):  
Oxidation State ◽  
Electrocatalytic Reduction ◽  
Copper Oxidation ◽  
Reduction Of Co2 ◽  
Electrocatalytic Reduction Of Co2
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