Zinc Sulfide

In this paper, synthesis of europium doped-zinc sulfide (Eu 3+ : ZnS) spherical nanoparticles was carried out using freshly prepared zinc oxide (ZnO) nanorods precursor. The synthetic method used was the precipitation technique. Both ZnO nanorods and Eu 3+ : ZnS spherical nanoparticles were characterized by X-ray diffraction (XRD) analyses, transmission electron microscopy (TEM), scanning electron microscopy (SEM), UV-Visible spectroscopy and photoluminescence studies. XRD results indicate crystalline nanoparticles with zinc blende and wurzite structures for Eu 3+ : ZnS spherical nanoparticles and ZnO nanorods, respectively. The lattice strain (13.81x10 -3 for Eu 3+ : ZnS and 3.98x10 -3 for ZnO) shows that Eu 3+ : ZnS spherical nanoparticles have a ten-fold increase in deformation which is likely caused by the introduction of Eu 3+ into the ZnS matrix. The morphology of the spherical nanoparticles and nanorods were confirmed from SEM and TEM results. Photoluminescence emission studies revealed that no energy transfer between Eu 3+ ion and host ZnS took place. UV-Visible spectroscopic studies show considerable blue-shift in the absorption energy for both ZnO nanorods (277 nm) and Eu 3+ : ZnS spherical nanoparticles (300 nm).

—In this study, the preparation of the zinc sulfide thin film by a substitution oxygen-sulfur inside sprayed ZnO compounds are investigated. First, the spray pyrolysis method has been used to grow the ZnO layers on glass substrates at 450 °C. The annealing process time was 12 hours. After a suitable cooling phase, the whole substrate-layer was introduced into a sealed tube. Consecutively, sulfur powder was introduced and vaporized under vacuum conditions inside the sealed tube containing the formerly ZnO prepared thin film. The structural properties of the prepared samples were characterized by X-ray diffraction (XRD) technique. We found that ZnS thin film have the cubic structure with a preferred orientation along (111) plane without any impurities and secondary phases. UV-VIS measurements show that the average transmittance of the ZnS thin films is between 63 and 73%. The optical band gaps for the ZnS and ZnO thin films were estimate too and it was 3.67 – 3.28 eV respectively.

Barium oxide (BaO) and zinc sulfide (ZnS) are well known for their applications in electrical, optical and chemical industries. The present study was aimed to evaluate the impact of biofield treatment on the structural and physical properties of BaO and ZnS powder. The study was carried out in two groups, one was set to control, and another group was subjected to Mr. Trivedi’s biofield treatment. Control and treated samples of BaO and ZnS were analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and surface area analyzer. XRD data showed that lattice parameter and unit cell volume of BaO powder were reduced upto 0.42% and 1.26%, respectively as compared to control. Whereas, density of treated BaO was increased upto 1.27% as compared to control. Besides, the unit cell volume was changed in treated ZnS from -0.55 to 0.24% as compared to control that led to change in density from -0.24 to 0.55% after biofield treatment. However, the crystallite size was substantially increased upto 40.5% and 71.4% in treated BaO and ZnS, respectively as compared to control. FT-IR data exhibited that absorption peaks at wavenumber 862/cm (control) was shifted to 858/cm in treated BaO. Upward shifting of absorption peaks corresponding to Zn-S stretching bond was observed in treated (617/cm) as compared to control (592/cm). Furthermore, surface area result showed that it was reduced by 4.32% and 2.1% in treated BaO and ZnS powder, respectively as compared to control. Hence, these, findings suggest that biofield treatment has altered the structural and physical properties of BaO and ZnS powders.

Barium oxide (BaO) and zinc sulfide (ZnS) are well known for their applications in electrical, optical and chemical industries. The present study was aimed to evaluate the impact of biofield treatment on the structural and physical properties of BaO and ZnS powder. The study was carried out in two groups, one was set to control, and another group was subjected to Mr. Trivedi’s biofield treatment. Control and treated samples of BaO and ZnS were analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and surface area analyzer. XRD data showed that lattice parameter and unit cell volume of BaO powder were reduced upto 0.42% and 1.26%, respectively as compared to control. Whereas, density of treated BaO was increased upto 1.27% as compared to control. Besides, the unit cell volume was changed in treated ZnS from -0.55 to 0.24% as compared to control that led to change in density from -0.24 to 0.55% after biofield treatment. However, the crystallite size was substantially increased upto 40.5% and 71.4% in treated BaO and ZnS, respectively as compared to control. FT-IR data exhibited that absorption peaks at wavenumber 862/cm (control) was shifted to 858/cm in treated BaO. Upward shifting of absorption peaks corresponding to Zn-S stretching bond was observed in treated (617/cm) as compared to control (592/cm). Furthermore, surface area result showed that it was reduced by 4.32% and 2.1% in treated BaO and ZnS powder, respectively as compared to control. Hence, these, findings suggest that biofield treatment has altered the structural and physical properties of BaO and ZnS powders.

There were synthesized ZnS nanoparticles by different routes, using thiourea as source for sulfide ion. The nanoparticles were studied by TEM having in view the correlation between starting materials, synthesis route, grain size and grain size distribution.