Synthesis Of Metal Sulfide Nanoparticles Research Articles

Response surface methodology: a powerful tool for optimizing the synthesis of metal sulfide nanoparticles for dye degradation

Metal sulfide nanoparticles (MSNs) have attracted significant attention due to their unique optical, electronic, and catalytic properties.

Silicate as a Versatile Matrix for the Aqueous Synthesis of Metal Sulfide Nanoparticles

AbstractThe addition of metals to the oligomeric sodium metasilicate in water results in insoluble metal silicate complexes that form nanoparticles, in which further chemical reactions can be carried out. Copper sulfide, copper tin sulfide, tin sulfide, bismuth sulfide and zinc sulfide doped with manganese nanoparticles were synthesized using this method. The silicate matrix resulted in a narrow particle size distribution and imparted long‐term stability to the nanoparticle suspensions. The reactions were monitored via UV‐Vis‐NIR spectroscopy, and the nanoparticles were characterized by AFM, powder X‐ray diffraction, and Raman spectroscopy. The described method is expected to become a general and versatile approach for aqueous synthesis of multimetallic, doped chalcogenide and other complex nanoparticles without the need of complicated chemical precursors, stabilizing agents, and multiple steps.

Impact of Synthesis Methods on Structural and Antifungal Properties of Metal Sulfide Nanoparticles.

Nanotechnology has the ability to produce novel nano-sized materials with excellent physical and chemical properties to act against phytopathogenic diseases, essential for revolution of agriculture and food industry. The development of facile, reliable and eco-friendly processes for the synthesis of biologically active nanomaterials is an important aspect of nanotechnology. In the present paper, we attempted to compare sonochemical and co-precipitation method for the synthesis of metal sulfide nanoparticles (MS-NPs) for their structural and antifungal properties against various phytopathogenic fungi of rice. The preparation of nanospheres (NSs) and nano rods (NRs) of CuS, FeS and MnS was monitored by UV-Visible spectroscopy complemented by transmission electron microscope (TEM), scanning electron microscope (SEM), atomic force microscopy (AFM), dynamic light scattering (DLS) and Zeta potential analyser. Sonochemical method resulted in formation of spherical shaped nanoparticles of size (7-120 nm), smaller than those of nanorods (50-200 nm) prepared by co-precipitation produced. It was observed that the metal sulfide nanospheres exhibited a better antifungal potential against D. oryzae, C. lunata and S. oryzae as compared to rod shaped metal sulfide nanoparticles. Smaller size and large surface area of spherical shaped particles opens up an important perspective of the prepared MS-NPs.

Biological Synthesis of PbS, As3S4, HgS, CdS Nanoparticles using Pseudomonas aeruginosa and their Structural, Morphological, Photoluminescence as well as Whole Cell Protein Profiling Studies.

Metal sulfide nanoparticles are semi-conductors that possess many applications in optics, optoelectronics and magnetic devices. There are physical and chemical methods for their synthesis but such methods involve toxic precursors as well as many obnoxious by-products. Hence, biological synthesis of metal sulfide nanoparticles are efficient enough to transform toxic metals to non-toxic ones. Pseudomonas aeruginosa, isolated from textile effluent and tolerant of high levels of heavy metals, was used for the green synthesis of metal sulfide (HgS, As3S4, CdS and PbS) nanoparticles. The optical, structural and morphological nature of metal sulfide nanoparticles was also determined. FTIR (Fourier Transform Infra-red) analysis showed spectral changes when P. aeruginosa was grown in medium containing heavy metals viz. Hg, As, Pb and Cd indicating that there are functional groups viz. carboxyl, hydroxyl, phosphate, amino and amide, that exists on the surface of the bacteria, thus facilitating binding of metals on its surface. The bacterial samples which were treated with different metals at different concentrations, were subjected to whole cell protein analysis using SDS-PAGE (Sodium dodecyl Sulphate- Polyacrylamide gel electrophoresis) and protein profiling. The total protein estimation revealed that there was an increase in the protein concentration in the presence of heavy metals and a significant change in the banding pattern was observed which showed induction of a set of proteins under heavy metal stress especially mercury.

Characterization of zinc sulfide (ZnS) nanoparticles Biosynthesized by Fusarium oxysporum

A variety of chemical and physical procedures could be used for the synthesis of metal sulfide nanoparticles. However, these methods suffer from some disadvantages including the use of toxic solvents, generation of hazardous by-products, and high energy consumption. In this work, zinc sulfide (ZnS) nanoparticles were synthesized through an environmentally and economically friendly method using the fungus Fusarium oxysporum. The ZnS nanoparticles were characterized using UV–visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Fluorescence spectroscopy. The obtained results demonstrated the presence of ZnS nanoparticles. Transmission electron microscopy (TEM), also determined their morphology as spherical, and their average size to be about 42nm.

Zn(II), Cd(II) and Hg(II) complexes of N-methyl-N-phenyl dithiocarbamate as single-source precursors for the synthesis of metal sulfide nanoparticles

Zn(II), Cd(II) and Hg(II) complexes of N-methyl-N-phenyl dithiocarbamate have been used as single source precursors to synthesize hexadecylamine capped ZnS, CdS and HgS nanoparticles and their structural and optical properties determined. The optical spectra of the prepared nanoparticles show a blue shift which is a characteristic of particles in their nanometric domain. The sizes of the prepared nanoparticles were estimated as 4.7, 6.2 and 18.0 nm for the ZnS, CdS, and HgS samples respectively.

In air liquid–solid phase synthesis of metal sulfide nanoparticles from metal acetates and thiourea

Cubic phase ZnS nanoparticles of several nanometers were synthesized directly via the liquid–solid reaction between zinc acetate and thiourea in air at 190 °C for 3 h. The structure, composition and optical property of the resultant product were characterized by means of X-ray powder diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectrum (EDX), Raman and UV–vis absorption spectra. The proposed method has also been successfully extended to synthesize MnS, CuS, CdS, PbS nanoparticles, etc., and may serve as a general kind of simple, mild and cheap way to synthesize semiconducting metal sulfide nanomaterials on a large scale.