Presently, nanotechnology is a multi-trillion dollar business sector that covers a wide range of industries, such as medicine, electronics and chemistry. In the current era, the commercial transition of nanotechnology from research level to industrial level is stimulating the world's total economic growth. However, commercialization of nanoparticles might offer possible risks once they are libe...

Thermal characteristics of turbulent nanofluid flow in a rectangular pipe have been investigated numerically. The continuity, momentum, and energy equations were solved by means of a finite volume method (FVM). The symmetrical rectangular channel is heated at the top and bottom at a constant heat flux while the sides walls are insulated. Four different types of nanoparticles Al2O3, ZnO, CuO, an...

Ammonia electro-oxidation (AEO) is a zero carbon-emitting sustainable means for the generation of hydrogen fuel, but its commercialization deterred due to sluggish reaction kinetics and poisoning expensive metal electrocatalysts. With this perspective, CuO impregnated ?-Al2O3 (CuO/?-Al2O3) hybrid materials were synthesized as effective affordable electrocatalysts investigated AEO in alkaline me...

UNLABELLED TeO2-nanostructured sensors are seldom reported compared to other metal oxide semiconductor materials such as ZnO, In2O3, TiO2, Ga2O3, etc. TeO2/CuO core-shell nanorods were fabricated by thermal evaporation of Te powder followed by sputter deposition of CuO. Scanning electron microscopy and X-ray diffraction showed that each nanorod consisted of a single crystal TeO2 core and a poly...

The use of steel-work off-gases as CO2 source for methanol production is a promising strategy the decarbonization steel industry. In this work, we show that typical impurities, namely S, N, Na, Ca and Fe, reduce activity commercial CuO/ZnO/Al2O3 catalyst by blocking part Cu active sites. extent loss proportional to poison-induced decrease in exposed surface area, suggesting poisons do not modif...

CuO/ZnO nanocomposites were greenly prepared and tested for the catalytic degradation of methyl orange. The XRD analysis confirmed existence CuO ZnO with crystallite sizes within range 15–30 nm. TEM SEM images showed different morphological properties. TGA revealed a good thermal stability nanocomposite, total loss less than 18% at temperature 700 °C. orange under mild conditions catalyst mass/...

In this study, the effects of treatment with Ag, Au, Cu, Pd, CeO2, CuO, TiO2 and ZnO nanoparticles (NPs) on plant secondary metabolism were tested using an untargeted metabolomic approach in cell suspension cultures Hypericum perforatum L. Variations accumulation metabolites observed after exposure to NPs. Overall, number compounds increased by metal NPs was higher than that oxides. Among oxide...

Fabrication of p-CuO/n-ZnO heterojunction through a vapor deposition growth hybrid CuO nanoparticles embedded ZnO nanowires for enhance optoelectronic device properties has been investigated. The controlled NWs with reasonably uniform size having an average length 1.5 ?m and diameter 40 nm was achieved using smart thermal CVD without employing any catalyst. Embedding NPs sputtering oxidation ap...

Copper-based catalysts are industrially applied in various reactions including water-gas shift, synthesis of fatty alcohols from fatty acid methyl esters, and methanol synthesis. Today, methanol is produced at low pressures (35-55 bar) and 200-300°C over Cu/ZnO/Al2O3 catalysts. Due to the great commercial relevance, Cu/ZnO-based catalysts have been extensively studied and many different models ...