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Suggested Citation:"Risk Characterization of Exposures to Zinc Cadmium Sulfide."National Research Council. 1997. Toxicologic Assessment of the Army's Zinc Cadmium Sulfide Dispersion Tests.Washington, …
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Here, we report that atomically dispersed nickel (Ni) in zincblende cadmium–zinc sulfide quantum dots (ZCS QDs) delivers an efficient and durable photocatalytic performance for water splitting under sunlight.
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The reduced sulphide ions are coupled with inorganic metal ions cadmium and zinc in extracellular environment and resulted in the formation of cadmium sulphide and zinc sulphide nanoparticles [40, 41]. Likewise sulphate ions, the selenium ions are also reduced to selenide ions through enzymatic reaction.
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The cadmium zinc sulfide (CdZnS) nanostructured powders with different morphologies such as nanorods, urchin like, microsphere were synthesized by co-precipitation method. In this approach, zinc nitrate (Zn(NO 3) 2), cadmium nitrate dihydrate (Cd(NO 3) 2 ·2H 2 O) and mercaptoacetic acid (MAA) were used as a Zn, Cd, and S …
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1. What is zinc cadmium sulfide, and why was it used in the Army's dispersion tests? Zinc cadmium sulfide is a fine powder that is formed by heating zinc sulfide and cadmium …
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The cadmium sulphide and zinc sulfide powders were mainly used in this paper as supplied by Alfa Aesar Ltd. (pure grade, 99.99% metal basis, −325 Mesh powder). The catalyst specific surface area is 6.5 m 2 /g for zinc sulfide and 7 m 2 /g for cadmium sulfide. Sodium sulfide is purchased from Ricca Chemical in a 0.75% (v/v) aqueous …
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The selective separation and recovery of copper, cadmium, zinc, and nickel from a polymetallic solution with sulphide precipitation using thioacetamide have been investigated.
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An Inclusive Review on Recent Advancements of Cadmium Sulfide Nanostructures and its Hybrids for Photocatalytic and Electrocatalytic Applications ... [24], [25]. The coupling between native atoms and impurity can improve the charge distribution and increase the separation and transfer of photogenerated charge carriers [26]. ... Self …
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A nanocomposite of cadmium sulfide and graphitic carbon nitride (CdS/g-C 3 N 4) was prepared from pulse liquid ablation in liquid. Nanostructure of cadmium sulfide are deposited on 2D nanosheet of graphitic carbon nitride. It have the advantage of improved absorption of visible light region, and reduced electron hole pairs …
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The importance of zinc oxide ores processing such as carbonate and silicates minerals have increased because of the depletion of zinc sulphide ores and the restriction on sulphur emissions during ...
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Cadmium sulfide is a chemical compound that has the formula CdS. It is yellow in color and commonly used as a pigment, in solar cells and photoresists. ... It has the same structure as that of zinc iron sulfide wurtzite. The structure of Greenockite is composed of SCd 4 tetrahedrons, which are stacked in a layered structure with every other ...
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Bio-photoelectrochemical degradation, and photocatalysis process by the fabrication of copper oxide/zinc cadmium sulfide heterojunction nanocomposites: Mechanism, microbial community and antifungal analysis. Author links open overlay panel Chao Lei a, ... due to the fast separation and transfer of photogenerated carriers.
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During the 1950s and 1960s, the U.S. Army conducted atmospheric dispersion tests in many American cities using fluorescent particles of zinc cadmium sulfide (ZnCdS) to develop and verify meteorological models to estimate the dispersal of aerosols. Upon learning of the tests, many citizens and some public health officials in the affected cities …
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However, the rapid recombination of electron–hole pairs and serious photocorrosion of these sulfide derivatives lead to poor stability of the photocatalysts. The promotion of charge separation and transfer is, therefore, one of the most effective strategies to improve the activity of sulfide catalysts [13].
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Cadmium is mainly a byproduct of beneficiating and refining of zinc metal from sulfide ore concentrates. The mined zinc ores are crushed and ground to liberate the zinc sulfide …
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A combined hydrometallurgical and pyrometallurgical process is proposed for the treatment of jarosite residue from zinc hydrometallurgy. The main steps of the …
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A solution of diethyl zinc, dimethyl cadmium, and TOP, and a second solution of hexamethyldisilathiane and TOP, were slowly injected into the pot at a rate of 2 mL/h for about 2 h. The reaction continued overnight at 80 °C.
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Thin films of Cd 1−x Zn x S (CZS) were prepared by a novel spin coating/melt method from cadmium ethylxanthato [Cd(C 2 H 5 OCS 2) 2] and zinc ethylxanthato [Zn(C 2 H 5 OCS 2) 2] in x ratios of 0–0.15 and of 1. A solution of the precursor(s) in THF was spin coated onto a glass substrate and then heated at 250 °C for 1 h under N 2.The …
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(Ni) in zincblende cadmium–zinc sulfide quantum dots (ZCS QDs) delivers an efficient and durable photocatalytic performance for water splitting under sunlight. The finely tuned Ni atoms dispersed in ZCS QDs exhibit an ultra-high photocatalytic H 2 production activity of 18.87 mmol hour −1 g−1. It could be ascribed to the favorable surface
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Preparation of ternary CdZnS thin films with varying zinc concentrations (0.1, 0.2, 0.3, 0.5 and 0.7 wt%) by chemical precipitation followed by doctor blade method is reported. The effect of zinc alloying, in detail, is enumerated in this paper. The films were air- annealed at 300 °C which displayed a color change from yellowish to brownish …
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Cadmium sulphide-based photocatalysts. Cadmium sulphide is an excellent semiconductor photocatalyst under visible light with a low direct bandgap of 2.4 eV and has gained much attention in recent years (Li et al. 2015; Solanki and Rajaram 2017). Owing to its perfect band positions, i.e. CB at -0.5 eV and VB at 1.8 eV with respect to …
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A simple two-step method was used by Kozlova et. al to prepare solid solution of cadmium and zinc sulfide (Cd1-x Zn x S). Under visible light irradiation, all …
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The main goal of this study was to recover the cadmium and nickel content of waste zinc filter cake. In this regard, at first, the dissolution of these elements in sulfuric acid and optimization of the solution process were considered. Effects of various parameters such as dissolution reaction time (10–40 min), temperature (25–80°C), …
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The inhibitory effect of zinc on cadmium-induced cell apoptosis and reactive oxygen species (ROS) production in cell cultures. Toxicology. 2000;145:159–71.
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Abstract The photoluminescence of nanostructures based on zinc, cadmium, and manganese sulfides is studied in relation to the conditions of synthesis and doping in a (poly)methyl methacrylate (PMMA) medium. Photoluminescence excitation is defined by interband electronic transitions in the semiconductor structure, by the absorption of …
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Zinc and cadmium can enter the body through the lungs, skin, and gastrointestinal tract. Intestinal absorption of zinc is controlled by zinc carrier protein CRIP. Zinc also binds to metallothioneins, which help prevent absorption of excess zinc. Zinc is widely distributed and found in all tissues and tissues fluids, concentrating in the liver, …
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Cadmium zinc sulphide thin films with high carrier mobilities have been obtained by chemical bath deposition carried out under acidic conditions. X-ray diffraction show that the introduction of small quantities of Zn, leads to a systematic contraction of the hexagonal lattice (upto 12% Zn). Deposits with higher fraction of Zn are less crystalline.
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As a result of many industrial processes, sewage is generated, and it contains a number of heavy metals, such as zinc, copper, nickel, mercury, cadmium, lead, or chromium (Fu and Wang 2011). Metals in wastewater can come from fertilizers or pesticides as well as from the plating, tanning, dyeing, textile, or electrochemical …
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Enhancement of visible light-driven hydrogen production over zinc cadmium sulfide nanoparticles anchored on BiVO 4 nanorods. Author links open overlay panel Muhammad Imran a 1, Ammar Bin Yousaf b 1, Muhammad Farooq c d ... The obtained powders were separated with centrifugation, washed several times with MQ …
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In situ photo-assisted deposition of MoS₂ electrocatalyst onto zinc cadmium sulphide nanoparticle surfaces to construct an efficient photocatalyst for hydrogen generation Nanoscale . 2013 Feb 21;5(4):1479-82. doi: 10.1039/c2nr34037b.
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