scholarly journals STRUCTURAL AND OPTICAL PROPERTIES OF CADMIUM SULFIDE NANOPARTICLES PREPARED BY PRECIPITATION METHOD

2019 ◽  
Vol 6 (1) ◽  
pp. 23-24
Author(s):  
Vidhya P ◽  
Ranjitha A ◽  
Balaganesh A.S ◽  
RanjitKumar R ◽  
Chandar Shekar B
Keyword(s):  
Cadmium Sulfide ◽  
Hexagonal Phase ◽  
Cost Effective ◽  
Precipitation Method ◽  
Electromagnetic Spectrum ◽  
Structural And Optical Properties ◽  
Optical Studies ◽  
Cadmium Sulfide Nanoparticles ◽  
Screening Off ◽  
Diffraction Peaks

Cadmium Sulfide nanoparticles were prepared by a simple and cost effective precipitation method. Xray analysis revealed broad diffraction peaks indicating that the particles are of very small size. The prominent broad peaks at 2θ values of 26.48°, 43.90°, and 51.91°, which could be indexed to the (002), (110) and (112) direction of the hexagonal phase of CdS. Optical studies showed maximum absorbance in the UV region but minimum absorbance in the VIS-NIR regions make it an excellent material for screening off UV portion of electromagnetic spectrum in UV filters and sensors.

Synthesis and Optical Properties of Annealed Cr Doped ZnS Nanoparticles

2013 ◽  
Vol 678 ◽  
pp. 163-167 ◽  
Author(s):  
D. Amaranatha Reddy ◽  
G. Murali ◽  
N. Madhusudhana Rao ◽  
R.P. Vijayalakshmi ◽  
B.K. Reddy
Keyword(s):  
Optical Properties ◽  
Hexagonal Phase ◽  
Blue Emission ◽  
Precipitation Method ◽  
Cubic Phase ◽  
Structural And Optical Properties ◽  
Zns Nanoparticles ◽  
Blue Emission Peak ◽  
Co Precipitation ◽  
Surface Morphologies

Undoped and Cr doped ZnS nanoparticles with Cr concentrations of 3.0 at.% were prepared by a chemical co-precipitation method for the fist time, using 2-Mercaptoethanol as the capping agent and annealed the synthesized particles at 600°C for 3h in air. The effect of annealing on morphological, structural and optical properties of ZnS and ZnS:Cr have been studied and compared with as prepared samples. EDAX measurements confirmed the presence of Cr in the ZnS lattice and it also confirms the conversion of ZnS into ZnO after annealed at 600 0C/3h. Surface morphologies of all samples were characterized using scanning electron microscopy (SEM). XRD spectra of as synthesized nanoparticles of ZnS and ZnS:Cr exhibited cubic phase. After annealing, the cubic phase is transformed into hexagonal phase. The particle sizes of the ZnS:Cr powders were increased from 5 to 30 nm when the powders were annealed at 600°C. A stable blue emission peak at 445 nm is observed from the as prepared samples (pure ZnS and Cr doped ZnS) but annealed at 600 0C the PL peaked at 500 nm for pure ZnS and Cr doped ZnS nanoparticles exhibited PL peak at 500 nm as well as 654 nm. The emission intensity decreased in annealed particles compared to as synthesized samples.

ChemInform Abstract: Structural, Optical and Photoconductivity Characteristics of Manganese Doped Cadmium Sulfide Nanoparticles Synthesized by Co-Precipitation Method.

ChemInform ◽  
2012 ◽  
Vol 43 (9) ◽  
pp. no-no
Author(s):  
Sheo K. Mishra ◽  
Rajneesh K. Srivastava ◽  
S G. Prakash ◽  
Raghvendra S. Yadav ◽  
A. C. Panday
Keyword(s):  
Cadmium Sulfide ◽  
Precipitation Method ◽  
Cadmium Sulfide Nanoparticles ◽  
Co Precipitation

Prominent Visible Light Photocatalytic and Water Purification Activity of PbS/CdS/CdO Nanocomposite Synthesized via Simple Co-Precipitation Method

2019 ◽  
Vol 9 (2) ◽  
pp. 278-284
Author(s):  
Mohammad Sabet ◽  
Marziyeh Mohammadi ◽  
Fatemeh Googhari
Keyword(s):  
Cadmium Sulfide ◽  
Water Solution ◽  
Hexagonal Phase ◽  
Wide Band ◽  
Precipitation Method ◽  
Cubic Phase ◽  
Distilled Water ◽  
Hydrothermal Route ◽  
Sem Images ◽  
Co Precipitation

Background: Due to unique chemical and physical properties and potential application in many fields, nanostructured materials have attracted many attentions. Cadmium sulfide (CdS) is a semiconductor that has a wide band gap of 2.42 eV at room temperature and can be served in solar cells and photoluminescence devices. Cadmium sulfide (CdS) is a kind of attractive semiconductor material, and it is now widely used for optoelectronic applications. CdS nano and microstructures can be synthesized via different chemical methods such as microwave-solvothermal synthesis, surfactant-ligand coassisting solvothermal method and hydrothermal route. Also different morphologies of this semiconductor such as dendrites, nanorods, sphere-like, flakes, nanowires, flower-like shape triangular and hexagonal plates, were synthesized. Methods: To synthesis of the nanocomposite, a simple co-precipitation method was served. In briefly, 0.1 g of Pb(NO3)2 was dissolved in the distilled water (Solution 1). Also different aqueous solutions were made from dissolving different mole ratio of Cd(NO3)2.6H2O respect to the lead source in the water (Solution 2). Two solutions were mixed together under vigorous stirring and then S2- solution (0.02 g thiourea in the water) was added to the Pb2+/Cd2+ solution. After that 0.1 g of CTAB as surfactant was added to the final solution. Finally to the synthesis of both sulfide and oxide nanostructures, NaOH solution was added to the prepared solution to obtain pH= 10. Distilled water and absolute ethanol were used to wash the obtained precipitate and then it dried at 80 °C for 8 h. Results: From the XRD pattern it was found that the peaks placed at 24.9°, 27°, 44.1°, 48°, 52°, 54°, 57.8°, 66.8°, 71.2° are associated to CdS compound with hexagonal phase (JCPDS=00-001-0780) that belong to (100), (002), (110), (103), (112), (201), (202), (203), (211) Miller indices respectively. The Other peaks belong to PbS with hexagonal phase (JCPDS=01-078-1897), and CdO with cubic phase (JCPDS=00-001-1049). From SEM images, it was found by choosing the mole ratio to 1:1, very small and uniform particles were achieved. By increasing Pb2+/Cd2+ mole ratio to 1:2, very tiny particles aggregated together were achieved. Conclusion: The results showed that the product can adsorb extra 80% of heavy metal ions from the water. So it can be said that the nanocomposite can be used in the water treatment due to its high photocatalytic and surface adsorption activities. In other words, it can remove heavy metals from the water and also decompose organic pollutions.

Structural, optical and photoconductivity characteristics of manganese doped cadmium sulfide nanoparticles synthesized by co-precipitation method

2012 ◽  
Vol 513 ◽  
pp. 118-124 ◽  
Author(s):  
Sheo K. Mishra ◽  
Rajneesh K. Srivastava ◽  
S.G. Prakash ◽  
Raghvendra S. Yadav ◽  
A.C. Panday
Keyword(s):  
Cadmium Sulfide ◽  
Precipitation Method ◽  
Cadmium Sulfide Nanoparticles ◽  
Co Precipitation

Effect of Mn Doping on Micro-Structural and Optical Properties of Cadmium Sulfide Nanoparticles

2013 ◽  
Vol 3 (3) ◽  
pp. 253-257 ◽  
Author(s):  
L. Bruno Chandrasekar ◽  
R. Chandramohan ◽  
R. Vijayalakshmi
Keyword(s):  
Optical Properties ◽  
Cadmium Sulfide ◽  
Structural And Optical Properties ◽  
Mn Doping ◽  
Cadmium Sulfide Nanoparticles

scholarly journals Nano Scale Hydroxyapatite from Crassostreao virginica (Oyster Seashells) and its Modification with Azadirachta Indica (Neem) Extract

2018 ◽  
Vol 15 (3) ◽  
pp. 296-306
Author(s):  
R. Usha ◽  
S. Sudhaparimala
Keyword(s):  
Azadirachta Indica ◽  
Hexagonal Phase ◽  
Cost Effective ◽  
Precipitation Method ◽  
Electron Microscopic ◽  
Neem Extract ◽  
Nano Scale ◽  
Scanning Electron Microscopic ◽  
Structural Activity Relationship ◽  
Relationship Of

Hydroxyapatite (HAp) is a widely explored biomaterial for bone and tooth replacements. Most of the research studies are being carried out in terms of novel routes of synthesis and fabrication in the nano scale to suit its applications. The present research study is unique in two aspects one being the use of seawaste namely Crassostreao virginica (Oyster) seashells as the source of calcium carbonate along with phosphoric acid and in the alkaline pH to synthesize nano sized HAp and secondly to check the enhanced activity of HAp if any, upon the addition of Azadirachta indica Extract (neem leaf and neem stem) by wet precipitation method. The structural activity relationship of assynthesised HAp sample was compared with that of the modified HAp using Azadirachta indica extract as medium. The presence of Hexagonal phase (JCPDS no-09-0432) was identified in all HAp samples. The crystallite size of 38nm was observed in the HAP prepared from the seashell in comparison with the crystallite of 49 nm (neem leaf) and 52mm (neem stem) modified HAp. The presence of spherical morphology and elemental composition of Ca,P in HAp and modified HAps were identified from Scanning Electron Microscopic images. The toxicity studies of assynthesised HAp and modified HAp with Azadirachta indica against Candida albicans and Streptococcus mutans were compared and the results were encouraging. This study ultimately provided a simple, cost effective green method of converting seawaste into high value biomedical product of nanoscale hydroxyapatite with enhanced antimicrobial activity.

Synthesis and Characterization of Cadmium Sulfide Nanoparticles by Chemical Precipitation Method

2015 ◽  
Vol 15 (11) ◽  
pp. 8434-8439 ◽  
Author(s):  
R. Aruna Devi ◽  
M. Latha ◽  
S. Velumani ◽  
Goldie Oza ◽  
P. Reyes-Figueroa ◽  
...  
Keyword(s):  
Cadmium Sulfide ◽  
Chemical Precipitation ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Cadmium Sulfide Nanoparticles

scholarly journals Photoluminescent Properties of Hydroxyapatite and Hydroxyapatite/Multi-Walled Carbon Nanotube Composites

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 832
Author(s):  
Edna X. Figueroa-Rosales ◽  
Javier Martínez-Juárez ◽  
Esmeralda García-Díaz ◽  
Daniel Hernández-Cruz ◽  
Sergio A. Sabinas-Hernández ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Hexagonal Phase ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Multi Walled Carbon Nanotube ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Co Precipitation ◽  
Functionalized Mwcnts

Hydroxyapatite (HAp) and hydroxyapatite/multi-walled carbon nanotube (MWCNT) composites were obtained by the co-precipitation method, followed by ultrasound-assisted and microwave radiation and thermal treatment at 250 °C. X-ray diffraction (XRD) confirmed the presence of a hexagonal phase in all the samples, while Fourier-transform infrared (FTIR) spectroscopy elucidated the interaction between HAp and MWCNTs. The photoluminescent technique revealed that HAp and the composite with non-functionalized MWCNTs present a blue luminescence, while the composite with functionalized MWCNTs, under UV-vis radiation shows an intense white emission. These findings allowed presentation of a proposal for the use of HAp and HAp with functionalized MWCNTs as potential materials for optoelectronic and medical applications.

Defect induced magnetism in green synthesized Cadmium Sulfide nanoparticles for spintronics applications

2021 ◽  
Vol 265 ◽  
pp. 114998
Author(s):  
N. Susha ◽  
Ajith S. Kumar ◽  
S. Vivek ◽  
Swapna. S. Nair
Keyword(s):  
Cadmium Sulfide ◽  
Cadmium Sulfide Nanoparticles

Titanate nanotubes co-sensitized with cadmium sulfide nanoparticles and porphyrin zinc: Preparation and enhanced photocatalytic activity under visible light

2012 ◽  
Vol 17 ◽  
pp. 136-139 ◽  
Author(s):  
Xiangqing Li ◽  
Lifang Liu ◽  
Shi-Zhao Kang ◽  
Jin Mu ◽  
Guodong Li
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Cadmium Sulfide ◽  
Titanate Nanotubes ◽  
Cadmium Sulfide Nanoparticles
Sign in / Sign up

Export Citation Format

Share Document