To improve current solid state thermoelectric devices, high performance materials based on safe and abundant elements is required. Here, Cu5-xZnxFeS4 (0 ≤ x ≤ 0.1) and Cu4.96Co0.04Fe1-xZnxS4 (0 ≤ x ≤ 0.06) nanostructured solid solutions, based on very abundant elements, were synthesized by h...

In the positional disordered unit cell of the natural bornite (Cu5FeS4) there are 10 copper and 2 iron atoms in the asymmetric unit. The positions M(4) and M(5) occupied by the iron atoms and the other ten by copper atoms represent the arrangement that is 30 kcal mol−1 more stable in energy than...

The bioleaching of bornite with mixed moderately thermophilic culture at 50 °C was investigated. The intermediary species formed during the leaching of bornite were characterized by XRD and XPS. In addition, the evolution of Cu-state during leaching of bornite was further studied by applying φ...

The interaction of acidophilic iron and sulphur-oxidising bacteria (A. ferrooxidans, L. ferrooxidans and A. thiooxidans) with a bornite-chalcocite ore at pH 4 and pH 2 was examined to determine the effect of secondary mineral coatings on bioleaching/copper solubilisation. Rock sample chips were ...

Copper nitride (Cu3N) films were deposited on copper foil substrates by reactive direct current (DC) unbalance magnetron sputtering. The Cu3N films with DC sputtering powers of 110, 205, 280 and 373 W under the mixture of argon (Ar) and nitrogen (N2) gases were investigated. The dependence of cr...

Developing new strategy to efficiently improve the photocatalytic activity of graphitic carbon nitride (g-C3N4) for hydrogen evolution is critical for its application in solar energy utilization. In this work, an innovative selective cation replacement process is developed to synthesize copper d...

Copper nitride (CuxN) thin films were prepared by plasma ion immersion implantation (PIII) then post-processed with oxygen plasma implantation at a voltage of − 1.5 kV. The resistive-switching properties of the CuxN:O-based RRAM devices were studied with different oxygen implantation time from 0...

In this study, a magnetic and heterogeneous nanocatalyst based on in situ synthesis of CuFe2O4 supported on mesoporous graphitic carbon nitride (mpg-C3N4) was developed. This mesoporous nanocomposite was well characterized via standard analysis methods. This catalyst was applied under simple and...

H2O2 is produced industrially by the anthraquinone method, in which energy consumption is high because of its multistep hydrogenation and oxidation reactions. In this work, hollow copper-doped graphitic carbon nitride (g-C3N4) microspheres with outstanding photocatalytic H2O2 production ability ...

The development of highly effective and robust electrocatalysts is an imperative requirement for the commercialization of direct methanol fuel cells. In this work, three dimensional, porous and urchin-like titanium copper nitride architectures is explored and implemented as the Pt support. The m...

Herein, large scale fabrication of porous boron nitride (BN) microrods has been achieved via a facile process, which involves the synthesis of melamine diborate precursors and subsequent thermal treatment process. The fabrication can be scaled up to ultra-large scale which is limited by the furn...

The presented paper describes a study concerning the synthesis of copper nitride layers by means of the pulsed magnetron sputtering (PMS) method that can work under conditions of various frequencies of modulation. The morphology and phase composition of the layers were determined as a function o...

Copper and hexagonal boron nitride filler (Cu/hBN) were incorporated into carbon fiber-reinforced polymer (CFRP) composites by electrophoretic deposition (EPD) to maximize their thermal conductivity. The results show that the thermal conductivity increased to 1.68 and 5.15 W/mK in the through-th...

Pb-doped copper nitride (Cu3N:Pb) films were prepared on monocrystalline silicon through reactive magnetron sputtering by using high-purity Cu and Pb as targets. The surface morphology, microstructure, and electrical parameters of the Cu3N:Pb films were characterized by X-ray diffraction, X-ray ...

Cuprous sulfide (Cu2S) is attractive electrode material for lithium-ion battery because of its high capacity and energy density. Interestingly, the cycling stability of cuprous sulfide is poor in the carbonate-based electrolytes used in lithium ion battery industry but excellent in ether-based e...

The counter electrode (CE) is an integral component of a quantum dot sensitized solar cell (QDSSC), for it catalyzes the electrolyte reduction during cell operation. CEs: copper sulfide (Cu2S), Cu2[email protected] oxide (GO), Cu2[email protected] graphene oxide (RGO) and Cu2[email protected] mu...

A hierarchical hybrid structure of cuprous sulfide (Cu2S) nanoparticles anchored graphene (Cu2S/RGO) has been successfully synthesized through a facile one-step hydrothermal method. The Cu2S nanoparticles with a size in the range of 10–30 nm are uniformly deposited onto the double sides of the ...

Mercury is one of the most severe environmental pollutants due to its high toxicity, and the detoxification of mercury-containing solid wastes is a critical issue worldwide. In this work, thiosulfate solution has been used to leach mercury from mercuric sulfide. The influence of leaching conditi...

Cuprite (Cu2O) is a low thermal expansion material with a negative thermal expansion coefficient below room temperature. Its peculiar thermal behaviour encompasses the increase of the shear modulus with increasing temperature, and the presence of rather intense symmetry-forbidden eeo reflections...

The low-temperature phase-transition of silver oxide (Ag2O) has been investigated by extended x-ray absorption fine structure (EXAFS) spectroscopy as a function of temperature. The thermal evolution of the local structure around Ag atoms has been determined. In particular, below the phase-transi...