Improved magnetism in Cr doped ZnS nanoparticles with nitrogen co-doping synthesized using chemical co-precipitation technique

Abstract

2 % Cr doped ZnS nanoparticles were synthesized using chemical co-precipitation technique. Powder X-ray diffraction reveals that Cr incorporates into the ZnS crystal lattice without troubling the original cubic structure. Transmission electron microscopy measurements show that the average size of these nanoparticles is in the range 3-4 nm. Room temperature photoluminescence studies show the increase in defects with increase in nitrogen codoping. 2 % Cr doped ZnS exhibit hysteresis loop at room temperature indicating the magnetic behavior with diamagnetic contribution with increase in applied field. Increase in nitrogen co-doping along with Cr in ZnS shows enhanced ferromagnetism with saturated magnetization.

Optical and Magnetic Properties of Ni Doped ZnS Diluted Magnetic Semiconductors Synthesized by Hydrothermal Method

“…When the doping concentration is low, the small magnetic dipoles existing on the surface of the nanorods interact with their nearest neighbors inside the particles, producing exchange energy that forces the other neighboring dipoles to be aligned in the same direction. Due to the high specific surface area of nanorods, the number of magnetic dipoles of the same orientation will be enhanced in the same direction [34,35]. At the same time, the ferromagnetic coupling plays a dominant role in the ferromagnetic contribution to the sample.…”

Catalytic Hydrogen Evolution from H2S Cracking over CrxZnS Catalyst in a Cylindrical Single-Layered Dielectric Barrier Discharge Plasma Reactor

“…There was no other obvious indication of any other diffraction peak found except for the alumina peak. Among all samples, only the Cr 0.20 ZnS catalyst showed the origination of diffraction peak related to Cr impurity [ 24 ]. The information about the existence of the characteristic peak of (110) plane was confirmed from JCPDS#65-0309.…”

Garlic Extract-Mediated Synthesis of ZnS Nanoparticles: Structural, Optical, Antibacterial, and Hemolysis Studies

“…It can be synthesized by various methods such as physical, chemical, and biological approaches [8][9][10]. While physical routes such as thermal evaporation [11], pulsed laser vaporization [12], and molecular beam epitaxy [13] and chemical methods like coprecipitation [14], sol-gel [9], sonochemical [15], and hydrothermal [10] are widely employed, biosynthesis is still in its advent. In addition, the conventional physical and chemical methods are expensive and release hazardous materials into the environment [16]; hence, to reduce such risk, biosynthesis has been considered the most reliable and safe method.…”