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nickel, etc ; electrodes; ligands; light; liquid-solid interface; oxidation; perchlorates; phenol; photocatalysis; China; Show all 10 Subjects
Abstract:
... Nickel (hydr)oxide (NiOH) is known to be good co-catalyst for the photoelectrochemical oxidation of water, and for the photocatalytic oxidation of organics on different semiconductors. Herein we report a greatly improved activity of Bi₂MoO₆ (BMO) by nickel hexammine perchlorate (NiNH). Under visible light, phenol oxidation on BMO was slow. After NiNH, NiOH, and Ni²⁺ loading, a maximum rate of phen ...
nickel, etc ; bismuth; cobalt; dielectric spectroscopy; electrochemistry; electron microscopy; graphene; sensors (equipment); soil; voltammetry; Show all 10 Subjects
Abstract:
... This work presents the realization and the application of an user-friendly electrochemical platform based on screen-printed electrodes for the simultaneous determination of nickel and cobalt ions in real samples by means of square wave adsorptive stripping voltammetry (SWAdSV). The sensor was realized by electrodepositing in situ a bismuth film onto graphite screen-printed electrodes (GSPEs). The ...
nickel, etc ; absorption; carbon; carbonization; durability; electromagnetic radiation; magnetism; manganese monoxide; microparticles; nanoparticles; radar; Show all 11 Subjects
Abstract:
... Regulating electromagnetic parameters and thus improving impedance matching characteristics by multi-component design is regarded as a prospective approach to obtain highly efficient electromagnetic wave absorption materials. Whereas, it is still challenging to fabricate microwave absorbers with strong absorption capacity and durability in harsh conditions. Based on the above considerations, three ...
nickel, etc ; chromium; density functional theory; electric field; energy; nanoparticles; photocatalysis; photoreduction; pyrite; sulfur; Show all 10 Subjects
Abstract:
... Improving the separation efficiency and transfer ability of photoinduced electrons/holes in pyrite (FeS₂)-based photocatalytic materials is significant for the photoreduction of hexavalent chromium (Cr(VI)) but still remains a challenge. Herein, a novel homojunction was prepared through in-situ growth of nickel (Ni) doped FeS₂ nanoparticles on FeS₂ nanobelts (denoted as Ni-FeS₂/FeS₂). Systematical ...
nickel, etc ; adsorption; dyes; electrocoagulation; electrolysis; heavy metals; industry; methyl orange; polymers; spectroscopy; wastewater; China; Show all 12 Subjects
Abstract:
... Electrocoagulation (EC) has been widely used to treat the heavy metal wastewater in industry. A novel process of sinusoidal alternating current electrocoagulation (SACC) is adopted to remove Ni²⁺ in wastewater in this study. The morphology of precipitates and the distribution of the main functional iron configurations were investigated. Ferron timed complex spectroscopy can identify the monomeric ...
nickel, etc ; cobalt; coproducts; economic feasibility; graphene; greenhouse gas emissions; human health; lithium batteries; market value; Show all 9 Subjects
Abstract:
... Although spent lithium-ion batteries (LIBs) recycling could reduce raw materials production, environmental and economic tradeoffs may not necessarily neutralize impacts associated with additional inputs. Here, we evaluated life cycle environmental and economic tradeoffs of traditional hydrometallurgy for mixed spent LIBs recycling. We revealed impacts of the main and co-products recycling, and the ...
... Exploring high-efficiency electrocatalysts for oxygen evolution reaction (OER) is one of the most important concerns to produce hydrogen in water electrolysis. Herein, the FNM/Co₂P-0.4 heterostructure was designed as an electrocatalyst for the OER process by the combination of MoO₄²⁻ intercalating NiFe LDH and Co₂P on nickel foam (NF). The surface reconstruction and MoO₄²⁻ leaching can induce the ...
Mitchell L. Kay; Izabela Jasiak; Wynona H. Klemt; Johan A. Wiklund; Jelle A. Faber; Lauren A. MacDonald; James V.K. Telford; Cory A.M. Savage; Colin A. Cooke; Brent B. Wolfe; Roland I. Hall
nickel, etc ; antimony; arsenic; bitumen; floodplains; gold; highlands; lakes; oils; pollution; research; river deltas; sediments; temporal variation; vanadium; Alberta; Show all 16 Subjects
Abstract:
... Abundant reserves of metals and oil have spurred large-scale mining developments across northwestern Canada during the past 80 years. Historically, the associated emissions footprint of hazardous metal(loid)s has been difficult to identify, in part, because monitoring records are too short and sparse to have characterized their natural concentrations before mining began. Stratigraphic analysis of ...
nickel, etc ; X-radiation; carbon; computed tomography; diffusivity; electrolytes; energy; foams; fuels; isotropy; ligaments; mass transfer; permeability; polymers; porosity; surface area; Show all 16 Subjects
Abstract:
... Nickel foams are excellent candidate materials for gas diffusion layers (GDLs) for polymer electrolyte fuel cells (PEFCs) and this is due to their superior structural and transport properties. A highly computationally-efficient framework has been developed to not only estimate the key structural and mass transport properties but also to examine the multi-dimensional uniformity and/or the isotropy ...
nickel, etc ; carbon; carbon dioxide; carbon nanotubes; density functional theory; desorption; electrodes; electrolytes; electrosynthesis; encapsulation; energy; ethanol; hydrogen; liquids; nanoparticles; vapors; Show all 16 Subjects
Abstract:
... The electrosynthesis of ethanol by CO₂ reduction is mostly achieved on metallic copper electrocatalysts, but confronts low Faradic efficiency (FE) and selectivity. Herein, we report novel electrocatalysts in which Ni nanoparticles are encapsulated in N-rich carbon nanotubes (Ni@NCNT) by chemical vapor deposition method. The optimized Ni@NCNT-700 exhibits a high ethanol FE of 38.5% at −0.5 V and re ...
nickel, etc ; antimony; arsenic; atmospheric deposition; cadmium; copper; lead; mercury; raw materials; risk; runoff; soil pollution; spatial variation; thallium; topsoil; zinc; China; Show all 17 Subjects
Abstract:
... Metal smelting have brought severe metal(loid)s contamination to the soil. Spatial distribution and pollution source analysis for soil metal(loid)s in an abandoned lead/zinc smelter were studied. The results showed that soil was contaminated heavily with metal(loid)s. The mean of lead (Pb), arsenic (As), cadmium (Cd), mercury (Hg) and antimony (Sb) content in topsoil is 9.7, 8.2, 5.0, 2.3, and 1.2 ...
nickel oxide, etc ; chromic oxide; electric potential difference; electrochemistry; electrodes; electrolysis; electron transfer; energy conversion; hydrogen; nanoparticles; nanosheets; oxidation; protective effect; reaction kinetics; urea; Show all 15 Subjects
Abstract:
... Applications of urea oxidation reaction (UOR) in various sustainable energy-conversion systems are greatly hindered by its slow kinetics. Herein, we demonstrate an in-situ confined synthesis method that produces amorphous chromium oxide confined Ni/NiO nanoparticles-assembled nanosheets (Ni/NiO@CrOₓ) with fast reaction kinetics towards UOR. The confinement effect of the in-situ generated CrOₓ over ...
nickel, etc ; absorption; adsorption; carbon; density functional theory; electrolytes; energy; hydrogen production; hydrophilicity; hydroxymethylfurfural; liquids; nanowires; oxidation; phosphides; phosphorus; pyrolysis; solar collectors; solar radiation; Show all 18 Subjects
Abstract:
... Multiple surface/interface engineering is an effective approach to develop efficient electrocatalysts for promoting the practical application of electrocatalysis and achieving carbon neutrality. Herein, a deep eutectic liquid precursor containing phosphorus was designed. The self-supported three-dimensional (3D) cobalt-doped Ni₁₂P₅/Ni₃P nanowire networks coated with a thin layer of carbon (Co-NiₓP ...
nickel, etc ; carbon; carbon dioxide; catalysts; desorption; electric potential difference; electrical conductivity; electrochemistry; electrolysis; energy conversion; fuel cells; hydrogen peroxide; nanocrystals; oxidation; pollution; selenides; urea; Show all 17 Subjects
Abstract:
... Electrochemical urea oxidation reaction (UOR) is urgently in demand for diverse energy conversion and storage device coupled with pollution treatment because of its favorable thermodynamic potential (0.37 V vs RHE) and wide distribution nature of urea, but simultaneously gravely limited by the sluggish reaction dynamics and poisoning of catalyst. Herein, dual-phased Ni₀.₈₅Se/NiSe₂ coupling with N ...
nickel, etc ; adsorption; catalytic activity; electric potential difference; electrical conductivity; electrochemistry; electrodes; electrolysis; energy conversion; foams; hydrogen production; hydrophilicity; industrial applications; mass transfer; nanosheets; oxygen production; Show all 16 Subjects
Abstract:
... Alkaline water electrolysis (AWE) offers a promising route for green hydrogen production. However, its industrial application is impeded by unsatisfactory energy conversion efficiency. Herein, a robust electrode composed of porous nickel foam (PNF) and Fe-doped Ni₃S₂ (Fe-Ni₃S₂) nanosheet arrays was fabricated and applied for industrial AWE. By conducting a scalable dynamic bubble-template method, ...
nickel, etc ; adsorbents; adsorption; carbon; coordination polymers; detection limit; electron transfer; fenitrothion; fluorescence; fluorometry; food composition; humans; magnetic separation; magnetism; nanocomposites; nanocrystals; nanoparticles; sensors (equipment); toxins; Show all 19 Subjects
Abstract:
... The development of precise methods for the residue assay of organophosphate toxin, fenitrothion, is of great significance in minimizing its side effects on human life and the environment. Herein, a magnetic fluorimetric nanosensor for fenitrothion was constructed via embedding the nickel and nitrogen-doped carbon dots and Fe₃O₄ nanoparticles into the zeolitic imidazolate framework-8 (ZIF-8). The p ...
nickel oxide, etc ; ascorbic acid; chitosan; concanavalin A; detection limit; electric current; electrochemistry; electroplating; energy-dispersive X-ray analysis; mannose; peroxidase; photoelectrodes; quartz crystal microbalance; schiff bases; soybeans; tin dioxide; transmission electron microscopy; ultraviolet-visible spectroscopy; Show all 18 Subjects
Abstract:
... A CdS/AuNPs/NiO Z-scheme heterojunction was prepared on a fluorine-doped tin oxide (FTO) electrode by hydrothermal synthesis of NiO on FTO, electrodeposition of AuNPs on NiO/FTO electrode and then cast-coating of CdS quantum dots. The CdS/AuNPs/NiO/FTO electrode gave a notably increased photocurrent versus NiO/FTO, CdS/FTO, AuNPs/NiO/FTO, CdS/AuNPs/FTO and CdS/NiO/FTO electrodes. The CdS/AuNPs/NiO ...
... Xanthomegnin, a known fungal toxin, secondary metabolite, and pigment diffuses from the dermatophytes has gained attention as local virulence factor because of the mutagenicity, toxicity, cytocidal, and immunosuppressive properties. Not only as a dermatophyte in skin related disorders, the production of xanthomegnin is implicated as a powerful diagnostic marker in patients suffering from ocular my ...
nickel; nickel oxide, etc ; cathodes; cobalt; coprecipitation; green chemistry; lithium; manganese; oxalates; solvents; Show all 10 Subjects
Abstract:
... A cornerstone of the decarbonisation agenda is the use of lithium ion batteries, particularly for electric vehicles. It is essential that effective recycling protocols are developed and this includes the ability to selectively digest and recover components of the cathode materials, most commonly including manganese, cobalt and nickel. This study shows a method by which nickel oxide can be efficien ...
nickel; nickel oxide, etc ; biomass; catalysts; dispersants; energy; iron; pyrolysis; synergism; wheat straw; Show all 10 Subjects
Abstract:
... This work aimed to investigate effects of volatile inherent minerals on catalytic pyrolysis of wheat straw over a Fe–Ca–Ni catalyst. The wheat straw was pretreated by HNO₃ (0.2 mol/L), And the internal structure of biomass does not change. Pickling mainly removes the metal species inherent in biomass. The experiment results indicated that inherent minerals and the Fe–Ca–Ni catalyst have a synergis ...