Sulfide Nano Research Articles

Eco-friendly synthesis F Cadmium sulfide nanoparticles using supernatant of Bacillus badius and its characterization

Development of reliable and eco friendly process for synthesis of nano particles is an important step in the field of nanotechnology. One of the options to achieve this objective is the use of natural factories such as biological systems. Supernatant of Bacillus badius organism is used for the reduction of Cadmium Sulphate to Cadmium Sulphide nano particle. The Cadmium Suphide nano particle have been confirmed through the UV–Visible spectra, which shows a characteristic absorption at 425 nm corresponding to the surface Plasmon absorbance of Cadmium Suphide nano particles. XRD data of the Cadmium Sulphide nano particles shows line broadening effect and the particle size evaluated using Scherrer equation. A fine distribution of nano particles is observed from the AFM image and the surface topography, Particles size etc is measured and found in the range of 40–80 nm. The process of reduction being extracellular and fast may lead to the development of an easy bioprocess for synthesis of Cadmium Sulphide nano particles.

A facile synthesis of boron nitride supported zinc cobalt sulfide nano hybrid as high-performance pseudocapacitive electrode material for asymmetric supercapacitors

High specific energy, extended working potential, and elevated cyclic stability are the major issues regarding supercapacitor technology. To fabricate a competent hybrid supercapacitor electrode, it is necessary to combine both pseudocapacitive and electric double-layer capacitor (EDLC)-type materials smartly. The prime objective of this work is to develop a high-performance asymmetric supercapacitor (ASC) device with long-term cycling stability and extended working potential. Accordingly, an ASC device was fabricated by using sphere-like pseudocapacitive Zinc Cobalt sulfide (ZCS) in combination with other pseudocapacitive [Boron Nitride (BN) and Polypyrrole (PPY)] and EDLC-type [CNT] materials. The synthesized quaternary composite exhibited maximum specific capacitance (Csc) of 534 and 785 F/g in aqueous (1 M KCl) and organic [(1 M TEABF4 in acetonitrile (ACN)] electrolytes, respectively. Moreover, it also exhibited excellent cycling stability (capacitance retention of 106% after 10,000 charge/discharge cycles) in aqueous electrolyte. Apart from this, a theoretical study has been exposed to determine the EDLC and pseudocapacitive contribution of the electrode materials. Further, the ASC device exhibited an extended working potential (worked up to 1.8 V) with high specific energy of 49.6 Wh/kg in organic electrolyte. With these promising electrochemical performance, this mixed metal chalcogenide based ASC is considered as potential candidate for next-generation supercapacitors.

Highly efficient copper-cobalt sulfide nano-reeds array with simplistic fabrication strategy for battery-type supercapacitors

Selected material combination, higher electrical conductivity, and high specific capacity were cognizance to favor supercapacitors (SCs), but their recognition at the same time has still a great challenger task. Herein, we demonstrate on copper-cobalt sulfide nano-reeds array with excellent nanoarchitecture has been developed by simplistic hydrothermal approach for SCs. The as-developed Cu-Co sulfide nano-reeds array possesses boosted electrochemical activities. In the performed SCs results, a specific capacity of 158.93 mA h g−1 has been reported at a current density of 2 A g−1 with well capability rate of 86.6% of the first capacity was remain at 20 A g−1. The effects of highly electroactive capabilities of Cu-Co sulfide nano reeds array electrode was optimized so that 93.1% of the first capacitance has been exhibited after 4000 cycles at 5 A g−1. Finally, these better most results demonstrated that the Cu-Co sulfide nano-reeds array material presents a progressive electroactive material for the future generation energy storage applications.

Assessment of acute toxicological effects of molybdenum(IV) disulfide nano- and microparticles after single intratracheal administration in rats

Despite growing applications of molybdenum(IV) sulfide (MoS2) nano- and microparticles in their capacity as lubricants, data available on their safety are scarce. In this study the effect of MoS2 nano- and microparticles after single intratracheal instillation in rats has been analyzed. MoS2 suspensions were administered at the dose of 1.5 or 5 mg MoS2/kg body weight. The analysis after 24 h and 7 days included: blood biochemical parameters, hematological parameters, bronchoalveolar lavage fluid (BALF) parameters with selected cytokines, a comet assay and histopathological examination.In the BALF cells isolated from animals exposed to both forms, numerous macrophages loaded with particles were observed. The hematological and biochemical parameters analyzed 24 h or 7 days after the exposure to both forms did not show any biologically meaningful changes. Comet assay results showed no genotoxic effect. The histopathological analysis of the lungs revealed inflammatory changes in the respiratory system of the treated animals, slightly stronger for the microsized form. The deposits of particles observed in the lung tissue up to 7 days after the instillation indicate their easy penetration through the epithelium and prolonged clearance. Concluding, no meaningful acute systemic effects were observed, however some pathological changes were noted in the lung tissue.

Nyctanthes arbor-tristis mediated silver sulphide nano particles: Synthesis, characterization and anti-inflammatory activities

Nyctanthes arbor-tristis mediated silver sulphide nano particles: Synthesis, characterization and anti-inflammatory activities

Synthesis of zinc oxide and zinc oxide/zinc sulfide nano composite via solution combustion route

In the present study, solution combustion synthesis of ZnO and ZnO/ZnS composite nanoparticles was synthesized using zinc nitrate and thioacetamide as starting materials, and Glycine as fuel. The influence of different parameters, such as oxidizer to fuel (O:F) ratio and calcination process on the structure, microstructure, photoluminescent and optical properties was investigated. X-ray diffraction (XRD) patterns showed that different phases of wurtzite structure of zinc oxide and zinc sulfide have been obtained using different O:F ratios of 1:1 and 2:3, Scanning electron microscopy (SEM) micrographs revealed that, depending on the O:F ratio, agglomerated nano particles were synthesized and formed porous microsrtructures. Fourier transformed infrared (FTIR) analysis of samples synthesized using Glycine fuel showed carbon bonds of carbonaceous matters in addition to Zn-O and Zn-S bonds due to incomplete combustion. Photoluminescence emission spectra showed that the highest intensity was obtained from the samples synthesized with using O:F ratio of 1:1, which may be due to considerable lattice defects.

Facile synthesis of nickel cobalt sulfide nano flowers for high performance supercapacitor applications

A facile synthesis of nickel cobalt sulfide (NCS) nanoflowers have been deposited successfully onto binder free 3D nickel foam electrodes using simple successive ionic layer adsorption and reaction (SILAR) method for supercapacitor applications. The obtained NCS nanoflowers manifest ultrahigh specific capacitance of 1899 F g−1 at a scan rate of 5 mV s−1. The NCS nanoflowers exhibit a prominent energy density of 55.16 Wh kg−1 at power density of 495 W kg−1 and superior cyclic stability of 94% after 10000 cycles. In addition, the asymmetric supercapacitor (ASC) device is fabricated using NCS nanoflower as positive and reduced graphene oxide (rGO) as negative electrodes, respectively. The ASC (NCS//rGO) delivered good capacity with excellent energy and power densities within 1.6 V wider potential window. Hence, NCS nanoflowers are an outstanding material for energy storage applications in near future.

Morphology and phase controlled synthesis of PVP-assisted copper antimony sulfide microstructures using solvothermal method and their properties

Shape and phase controlled synthesis of Polyvinylpyrrolidone (PVP) assisted Copper Antimony Sulfide (CAS) nano/- microstructures were successfully synthesized by solvothermal method in single step. X-ray diffraction (XRD) reveals that the orthorhombic phase of CuSbS2for different molar ratio of precursor. The Raman spectra of CAS nano/- microstructures clearly exhibit a single phase of CuSbS2. The morphology of the prepared CAS nano/- microstructures were characterized using Field emission scanning electron microscopy (FE-SEM), which showed of monodispersed CuSbS2 microstructures. The Energy Dispersive X-ray Analysis (EDAX) confirmed the presence of copper, antimony, sulfide and their atomic ratio is around 1:1:2. Using different molar ratio of precursor in solution process, phase-pure, highly crystalline CuSbS2 microstrutures with around 40 nm crystallite size was successfully obtained. The optical absorption spectra reveal that the CuSbS2 has optical bandgap varying from 1.61 eV to 1.74 eV. I–V characteristics for CuSbS2 semiconducting thin films show linear characteristics. Hall measurement studies reveal that film prepared from the sample consisting microspheres with flakes like morphology acquires low resistivity, high mobility and high carrier concentration.

Iron Sulfide Materials: Catalysts for Electrochemical Hydrogen Evolution

The chemical challenge of economically splitting water into molecular hydrogen and oxygen requires continuous development of more efficient, less-toxic, and cheaper catalyst materials. This review article highlights the potential of iron sulfide-based nanomaterials as electrocatalysts for water-splitting and predominantly as catalysts for the hydrogen evolution reaction (HER). Besides new synthetic techniques leading to phase-pure iron sulfide nano objects and thin-films, the article reviews three new material classes: (a) FeS2-TiO2 hybrid structures; (b) iron sulfide-2D carbon support composites; and (c) metal-doped (e.g., cobalt and nickel) iron sulfide materials. In recent years, immense progress has been made in the development of these materials, which exhibit enormous potential as hydrogen evolution catalysts and may represent a genuine alternative to more traditional, noble metal-based catalysts. First developments in this comparably new research area are summarized in this article and discussed together with theoretical studies on hydrogen evolution reactions involving iron sulfide electrocatalysts.

Room Temperature Ferromagnetism in Fe Doped CdS and Cobalt Doped CdS Nano Particles

The undoped and doped cadmium sulphide nano particles were prepared by co precipitation technique at room temperature.The effect of nano stochiometry on structural , micro structural properties of the powders were studied. The structural properties of the nano powders were investigated by X ray diffraction. The Scanning Electron Microscopic studies were carried out using (Quanta FEG 250) and Elemental Analysis was carried out with an EDAX using Energy dispersive X ray spectrophotometer. The particle size was also calculated and compared.The room temperature ferromagnetism of the doped and undoped cadmium sulphide nano particle I also investigated using vibrating sample magenetrometer.

Tunable luminescence and transmittance nature of CdS:PMMA nanocomposites for optoelectronic applications

Optical and energy storage materials based on semiconductors are of great interest today. The present report explains the semiconductor nanocomposite centered on highly transparent Poly(methyl methacrylate) (PMMA) matrix and Cadmium Sulphide (CdS) nano particles. The solid films of CdS:PMMA composite was prepared using simple and cost effective solution casting technique. The surface morphology and the presence of CdS particles in PMMA matrix was analysed using Scanning Electron Microscope (SEM) and Energy Dispersive X-ray spectra (EDX). The size of the particles was analysed using Atomic Force Microscopy (AFM) and Transmission Electron Microscope (TEM) and they revealed the presence of nano sized particles. The narrow size distribution of particles was identified from TEM and AFM analysis. The transmittance of the CdS:PMMA nanocomposite solid films was found to be above 90%. The blue and green emission of CdS:PMMA nanocomposite solid films were observed from Photoluminescence (PL) spectra.

Sonocatalysis degradation of methyl orange using zinc sulfide carbon nanotubes nanocatalyst

Dye sewage is dangerous problem in our environmental aquatics that cause generation of harmful effects for living organism. In this work, because of simplicity, easy operation, high efficiency and no creating secondary pollutants, ultra sound radiation applied for degradation of a synthetic dye, methyl orange using zinc sulfide nano particles decorated on carbon nanotubes as nanocatalyst. ZnS/CNTs prepared by co-precipitation of carbon nanotubes and zinc aceate. Methyl orange (MO) is a cationic dye that used widely in some medical uses, coloring paper, dyeing cottons, wools, coating for paper stocks and etc. For achieving highest degradation efficiency several parameters such as pH, amount of nanocatalyst, initial dye concentration and time were evaluated and optimized. Results showed that highest degradation efficiency (100%) obtained at 0.3 gr of nanocatalyst while initial dye concentration is 30 mg/L at pH, 2. Comparison of several methods for degradation of methyl orange showed feasibility of applied method. In addition, reusability of nanocatalyst was suitable for degradation of MO in real wastewater samples.

Ternary tin selenium sulfide (SnSe0.5S0.5) nano alloy as the high-performance anode for lithium-ion and sodium-ion batteries

Metal sulfides have received tremendous attention due to their superior electrochemical performance. In this study, it is the first time that the ternary tin selenium sulfide, SnSe0.5S0.5, is investigated as a potential high-performance anode material for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The SnSe0.5S0.5/C nanocomposites have also been synthesized through a facile polyol-method followed by a simple hydrothermal process and subsequent sintering. The material demonstrated a high specific capacity and a long-term cycling stability in both Li-ion and Na-ion batteries (625mAhg−1 for LIB at 500mAg−1 rate after 1000 cycles, 430mAhg−1 in a SIB at 200mAg−1 rate after 100 cycles). Furthermore, the kinetic analysis of Li-ions and Na-ions storage revealed that the extrinsic pseudocapacitive contribution could improve the charge transfer rate during the insertion and extraction of Li-ion and Na-ion, thus enhancing the rate performance and cycling stability. These results demonstrated that the novel tin selenium sulfide (SnSe0.5S0.5) material could potentially be an excellent anode material for Li-ion storage and Na-ion storage.

One-pot synthesis of CTAB stabilized mesoporous cobalt doped CuS nano flower with enhanced pseudocapacitive behavior

In this study, we prepared porous CuS and Cobalt (Co) doped copper sulfide (CuS) nano flower by hydrothermal route. Cationic surfactant cetyl trimethyl ammonium bromide (CTAB) was used as stabilizer and copper nitrate, cobalt nitrate as precursors, thiourea as sulfur source and ethylene glycol as solvent. Structural, functional, optical properties, morphological, surface area and chemical nature of the as-synthesized samples were thoroughly characterized by XRD, FTIR, UV–Vis, SEM/EDS, TEM, BET and XPS techniques respectively. The optical band gap of CuS and Cobalt doped CuS nano flowers was estimated between 1.9 and 2.52 eV. The scanning electron microscopy and transmission electron microscopy images demonstrate flower like nanostructures with length around 140 nm. Then the synthesized samples were utilized for electrochemical performance to modify the glassy carbon electrode (GCE). The electrochemical performance of the as-synthesized CTAB/CuS and CTAB/Cobalt (0.15 mM) doped CuS material was studied by cyclic voltammetry and electrical impedance spectroscopy. These results demonstrate that CTAB/cobalt doped CuS electrode delivered a high specific capacitance of 586.45 Fg-1 in a2M KOH aqueous electrolyte at 5 mV/s and indicating their potential application as promising electrode materials for supercapacitors.

Modeling of Mn2+ Doped Zinc Sulfide Nano Crystals

A theoretical study of crystal field parameters (CFP) and zero-field splitting (ZFS) parameter D of Mn2+ doped zinc sulfide (ZnS) nano crystals is carried out with the help of superposition model and the perturbation theory. The ZFS parameter D obtained here is in good agreement with the experimental value reported earlier. The conclusion of experimental study that Mn2+ substitutes for Zn2+ in ZnS is well supported by our theoretical investigation. The values of D without and with local distortion are 65 × 10−4 and 71 × 10−4 cm−1, respectively, while the experimental value is 66 × 10−4 cm−1.

Photoluminescence Behavior of Manganese Doped Zinc Sulphide, Synthesized by Hydrothermal Process

The branch of electronics depends mainly upon semiconductors. Silicon is front running candidate in this race. As the time passed the advancement in the field of chemistry has included elements of cadmium, germanium, zinc, nickel etc., have joined the group. Among these elements Zinc oxide and sulphide have given promising results. They are easy to synthesis and environmental friendliness has increased their usefulness. The Zinc Sulphide with transition metal dopants has higher photoluminescent property, which helped in the field of photovoltaic and development of solar cells. Zinc sulphide nano particles in presence of complete 3d shell in Manganese in the lattice will help in the excess of electronic transition from 4T1- 4A1 orbitals. This was studied using photoluminescence (PL) spectroscopy and X-ray Photoluminescence Spectroscopy (XPS). In photoluminescence (PL), excited electrons in the Zinc Sulphide lattice provide an emission at 480 nm, but the presence of Manganese pushes the emission to 587 nm and XPS showed the orbital separation during the emissions.

Development of cathode materials for magnesium primary cell

The Zinc Sulfide nanoparticles were synthesized by simple chemical reaction of ZnCl 2 and Sulphur powder in aqueous solution. The main advantage of this method is the use of non-toxic precursors and water as solvent. The BZ1 and NZ2 samples reveal an average particle size respectively 510 and 43.7 nm. The structural, morphological, chemical composition and optical properties of the nanoparticles were investigated by X-ray diffraction, Scanning electron Microscopy, and Energy-dispersive X-ray Spectroscopy, Ultra Violet Spectroscopy and Electrochemical studies. The NZ2 sample showed a high discharge capacity of 362 mAh g -1 , whereas the BZ1 sample showed a discharge capacity of 120 mAh g -1 . The discharge capacity of NZ2 sample based cathode was 33.1 % higher than BZ1 sample based cathode. Thus, the above studies confirm that zinc sulfide nano powders show promise application as a cathode material for Mg/ZnS primary cell.

TEMPERATURE AND PARTICLE SIZE DEPENDENT D.C CONDUCTIVITY OF ZINC SULFIDE NANOMATERIALS PREPARED BY USING INDIAN OLIVE LEAF EXTRACT.

17Sep 2016 TEMPERATURE AND PARTICLE SIZE DEPENDENT D.C CONDUCTIVITY OF ZINC SULFIDE NANOMATERIALS PREPARED BY USING INDIAN OLIVE LEAF EXTRACT. Uday Sankar Senapati. Green synthesis materials are considered as the substantial alternative of chemical based materials as they are environment friendly and cost effective. Study of electrical properties of engineering material is very important as it helps in optimizing sample parameters for better device applications. In this article effect of average particle size and temperature on D.C conductivity of Zinc Sulfide nano materials prepared by using a green synthesis route is reported.

Structural Properties of Indium Sulfide Thin Films Produced by CBD Method at Different Deposition Temperature

Indium sulfide Nano layers on glass substrate was prepared by Chemical Bath Deposition (CBD) method, at different deposition temperatures 30˚C and 70˚C for about 45 minutes as deposition time. Crystalline and Nanostructures of the layers were obtained, by using X-ray Diffraction (XRD) and Atomic Force Microscopy (AFM) analysis.

Influence of molar concentration on triethanolamine added copper doped tin sulfide (CuxSn1−xSy) nano thin films grown by SILAR method

Thin films of copper doped tin sulphide (CuxSn1−xSy) with the complexing agent TEA are deposited on glass substrates by SILAR technique for various molar concentrations (0.01–0.10 M) at room temperature. The structural, surface morphology, topography and optical properties of the films are studied for the varying molar concentrations. XRD studies reveal the amorphous nature of TEA added Cu doped SnS films. The surface morphology was observed by SEM images. Surface topography of the film is studied by AFM. 2D-AFM images reveals that the grain size, surface roughness and height decreases for the increasing concentration. FTIR analysis shows the molecular vibrations. The optical properties of the deposited films are investigated by measuring the optical absorbance of the films in a range of 300–800 nm with a UV–Vis spectrophotometer. Other properties such as transmittance, refractive index, and energy gap are calculated. Based on the above characterisations, synthesized TEA added copper doped tin sulphide thin film may be used for small band-gap semiconductors, non-linear materials and photovoltaic cell materials.