Structural, optical and magnetic properties of Ni-doped CdS thin films prepared by CBD

J Inorg Organomet Polym

et al. 2021

The present work describe the synthesis of Cd 0.9 Zn 0.1 S and Cd 0.87 Zn 0.1 Ni 0.03 S nanostructures by chemical co-precipitation method. The XRD profile proved the cubic crystal structure of the samples without any impurity related phases. The reduced size from 63 to 51 Å and the dissimilarities in lattice parameters and micro-strain has been discussed by Ni addition in Cd 0.87 Zn 0.1 Ni 0.03 S structure. The noticed anomalous optical studies and the elevated transmittance at Ni doped sample suggested them for the fabrication of efficient opto-electronic devices. The energy gap reduction during the substitution of Ni = 3% is explained by the generation of extra energy levels associated with defects within the two bands. The release of additional charge carriers, improved optical property, reduced particle size and more defect generation are responsible for the enhanced photo-catalytic performance of Ni doped Cd 0.9 Zn 0.1 S. The enhanced anti-bacterial capacity in Cd 0.87 Zn 0.1 Ni 0.03 S is described by the collective response of reduced particle size and higher reactive oxygen species (ROS) like O 2 ⋅− , H 2 O 2 and OH ⋅ generating capacity.

“…8. The same defect associated reduction in E g was described by Premarani et al [65] by the introduction of new energy levels around the two bands in Ni doped system.…”

Section: Energy Gap (E G )supporting

confidence: 75%

Enhanced Photo-Catalytic and Antibacterial Properties of Ni-Doped Cd0.9Zn0.1S Nanostructures

Jothi¹,

Ganesh

J Inorg Organomet Polym

et al. 2021

“…The current red-shift of band gap confirmed the proper inclusion of Ni 2+ ions within Cd-Zn-S lattice [46]. Moreover, the reduction in Eg is associated with the defects which are induced by Ni and the localized energy states around the band edges as supported by Premarani et al [47].…”

Section: Optical Propertysupporting

confidence: 63%

Influence of Ni2+ Ions on the Structural, Morphological, Photoluminescence, Photo-Catalytic and Anti-Bacterial Studies of Cd0.9Zn0.1S Nanostructures

Prabu¹,

Jesuraj

2021

Preprint

Controlled synthesis of Cd0.9Zn0.1S and Cd0.89Zn0.1Ni0.01S nanostructures by chemical co-precipitation route was reported. The XRD analysis confirmed the cubic structure of CdS on Zn doping and Zn, Ni dual doping without any secondary/impurity phases and no alteration in cubic phase was noticed by Zn/Ni addition. The shrinkage of crystallite size from 69 Å to 43 Å and the variation in lattice constants and micro-strain were described by the addition of Ni and the defects associated with Ni2+ ions. The enhanced optical absorbance in the visible wavelength and the reduced energy gap by Ni substitution showed that Cd0.89Zn0.1Ni0.01S nanostructures are useful to improve the efficiency of opto-electronic devices. The functional groups of Cd-S / Zn-Cd-S /Zn/Ni-Cd-S and their chemical bonding were verified by Fourier transform infrared studies. The elevated visible PL emissions such as blue and green emissions by Ni addition was explained by worsening of crystallite size and generation of more defects. Zn, Ni dual doped CdS nanostructures are identified as the probable an efficient photo-catalyst for the degradation of methylene blue dye. The liberation of more charge carriers, better visible absorbance, improved surface to volume ratio and the creation of more defects are accountable for the current photo-catalytic activity in Zn/Ni doped CdS which exhibited better photo-catalytic activity after sex cycling process. The noticed higher bacterial killing ability at Ni doped Cd0.9Zn0.1S is due to the collective effect of lower particle/grain size and also higher ROS producing capacity.

“…The current red-shift of band gap confirmed the proper inclusion of Ni 2+ ions within Cd–Zn–S lattice [ 52 ]. Moreover, the reduction in E g is associated with the defects which are induced by Ni and the localized energy states around the band edges as supported by Premarani et al [ 53 ].…”

Section: Resultsmentioning

confidence: 81%

Influence of Ni2+ ions on the structural, morphological, photoluminescence, photo-catalytic and anti-bacterial studies of Cd0.9Zn0.1S nanostructures

Prabu

Jesuraj

J Mater Sci: Mater Electron

2021

The present investigation reported the controlled synthesis of Cd 0.9 Zn 0.1 S and Cd 0.89 Zn 0.1 Ni 0.01 S nanostructures by simple chemical co-precipitation route. The XRD analysis confirmed the cubic structure of CdS on Zn doped CdS and Zn, Ni dual doped CdS without any secondary/impurity phases and no alteration in CdS cubic phase was noticed by Zn/Ni addition. The shrinkage of crystallite size from 69 to 43 Å and the variation in lattice constants and micro-strain were described by the addition of Ni and the defects associated with Ni 2+ ions. Microstructural and optical studies of the prepared films were carried out using scanning electron microscope (SEM), UV-visible spectrometer and photoluminescence (PL) spectra. The enhanced optical absorbance in the visible wavelength and the reduced energy gap by Ni substitution showed that Cd 0.89 Zn 0.1 Ni 0.01 S nanostructures are useful to improve the efficiency of opto-electronic devices. The functional groups of Cd-S/Zn-Cd-S/Zn/Ni-Cd-S and their chemical bonding were verified by Fourier transform infrared (FTIR) studies. The elevated visible PL emissions such as blue and green emissions by Ni addition was explained by decreasing of crystallite size and generation of more defects. Zn, Ni dual doped CdS nanostructures are identified as the probable an efficient photo-catalyst for the degradation of methylene blue dye. The liberation of more charge carriers, better visible absorbance, improved surface to volume ratio and the creation of more defects are accountable for the current photo-catalytic activity in Zn/Ni doped CdS which exhibited better photo-catalytic stability after sex cycling process. The better bacterial killing ability is noticed in Ni doped Cd 0.9 Zn 0.1 S nanostructure which is due to the collective effect of lower particle/grain size and also higher ROS producing capacity.