نتایج جستجو برای: zinc sulfide
تعداد نتایج: 90230 فیلتر نتایج به سال:
electrosynthesis process has been used for preparation of zinc sulfide nanoparticles. zinc sulfide nanoparticles in different size and shapes were electrodeposited by electrolysis of zinc plate as anode in sodium sulfide solution. effects of several reaction variables, such as electrolysis voltage, sulfide ion concentration as reactant, stirring rate of electrolyte solution and temperature on p...
Electrosynthesis process has been used for preparation of zinc sulfide nanoparticles. Zinc sulfide nanoparticles in different size and shapes were electrodeposited by electrolysis of zinc plate as anode in sodium sulfide solution. Effects of several reaction variables, such as electrolysis voltage, sulfide ion concentration as reactant, stirring rate of electrolyte solution and temperature on p...
zns nanoparticles were synthesized via a simple surfactant free microwave route. in this synthesis, thioacetamide was used as sulfur source. the effects of different parameters such as type of zinc precursor, time and power of irradiation on the morphology and particle size of the products have been investigated. the nanostructures were characterized by ...
Desulfotomaculum nigrificans, a typical sulfate reducing bacterium (SRB) was successfully grown in the presence of 12-210 mg/L of zinc. Complete bioremoval of zinc was achieved in 2 days for 12 mg/L while the bioremoval efficiency was about 70% in 40 days in the presence of 210 mg/L initial concentration of zinc, attesting to the inhibition of bacterial cell growth at higher zinc concentrations...
nanoparticles of zinc sulfide as undoped and doped with copper were used as photocatalyst in the photodegradation of hmx (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) and rdx (hexahydro-1,3,5-trinitro-1,3,5-triazine) as nitramine explosives under uv and vis irradiations. photoreactivity of doped zinc sulfide was varied with dopant, mole fraction of dopant to zinc ion, ph of solution, dosag...
In this research zinc sulfide (ZnS) nanoparticles and nanocomposites powders were prepared by chemical precipitation method using zinc acetate and various sulfur sources. The ZnS nanoparticles were characterized by X-ray diffraction, scanning electron microscopy, ultraviolet-visible and fourier transform infra-red. The structure of nanoparticles was studied using X-ray diffraction pattern. The ...
This paper describes the equilibrium morphologies of zinc sulfide nanoparticles in the wurtzite phase as a function of size, determined using ab initio Density Functional Theory (DFT) simulations and a shape-dependent thermodynamic model predicting the Gibbs free energy of a nanoparticle. We investigate the relative stabilities of a variety of nanoparticle shapes based on the wurtzite structure...
Zinc sulfide clusters were synthesized and characterized at low micromolar concentrations to assess the effect of metal-sulfide ligands on metal toxicity to aquatic organisms in oxic environments. Recommended preparation times are greater than 2 h initial reaction of equimolar sodium sulfide and zinc nitrate, followed by oxic aeration for 3 d. Ionic strength, pH, and anoxic stabilization time w...
The Journal of Physical Chemistry is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Photoredox reactions at semiconductor particles incorporated into clays. Cadmium sulfide and zinc sulfide + cadmium sulfide mixtures in colloidal montmorillonite suspensions O. Enea, and Allen J. Bard J. Phys. Chem., 1986, 90 (2), 301-306 • DOI: 10.1021/j100274a020 D...
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