IJSTR

International Journal of Scientific & Technology Research

IJSTR@Facebook IJSTR@Twitter IJSTR@Linkedin
Home About Us Scope Editorial Board Blog/Latest News Contact Us
CALL FOR PAPERS
AUTHORS
DOWNLOADS
CONTACT
QR CODE
IJSTR-QR Code

IJSTR >> Volume 3- Issue 5, May 2014 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Synthesis, Structure And Characterization Of Zns Qds And Using It In Photocatalytic Reaction

[Full Text]

 

AUTHOR(S)

Khalid T. Al- Rasoul, Issam M. Ibrahim, Iftikhar M. Ali, Raad M.Al-Haddad

 

KEYWORDS

Index Terms: Degradation, Photoluminescence, precipitation method, Microwave irradiation, nanoparticles, Quantum dots and ZnS

 

ABSTRACT

Abstract: ZnS nanoparticles were prepared by a simple microwave irradiation method under mild condition. The starting materials for the synthesis of ZnS quantum dots were zinc acetate (R & M Chemical) as zinc source, thioacetamide as a sulfur source and ethylene glycol as a solvent. All chemicals were analytical grade products and used without further purification. The quantum dots of ZnS with cubic structure were characterized by X-ray powder diffraction (XRD), the morphology of the film is seen by scanning electron microscopy (SEM). The particle size is determined by field effect scanning electron microscopy (FESEM), UV-Visible absorption spectroscopy and XRD. UV-Visible absorption spectroscopy analysis shows that the absorption peak of the as-prepared ZnS sample (310 nm) displays a blue-shift comparing to the bulk ZnS (345 nm). Photoluminescence spectra of the samples revealed a broad peak centered at 404nm, which were related to excitonic emission. Photocatalytic degradation of Methylene Blue (MB) dye catalyzed by synthesized nanoparticles was studied under solar radiation, photocatalytic degradation increased with increasing time exposure to solar light.

 

REFERENCES

[1] A. Van Dijken, A.H. Janssen, M.H. P. Smitsmans, D. Vanmaekelbergh and A. Meijerink" Size-selective photoe-tching of nanocrystalline semiconductor particles" Chem. Mater. 10(1998) 3513-3522.

[2] O. Tetsuichiro, K. Kenichi, T. Tsunemasa, "Growth of high-quality cubic ZnS crystals and their application to MIS blue light-emitting diodes" J. Cryst. Growth 99 (1990) 737.

[3] P.I. Ekwo, C.E. Okeke," Thermoelectric properties of the PbSZnS alloy semiconductor and its application to solar energy conversion" Energy Convers. Manage. 33 (1992) 159-164.

[4] L.P. Colletti, R. Slaughter, J.L. Stickney," Luminescence properties of Br-doped ZnS nanoparticles synthesized by a low temperature solid-state reaction method” J. Ceramics International,39,5(2013)5521-5525.

[5] V elumani, J.A. Ascencio," "Formation of ZnS nanorods by simple evaporation technique", Appl. Phys. A 79 (2004) 153.

[6] Huaming Yang, Chenghuan Huang, Xiaohui Su, Aidong Tang,"Microwave-assisted synthesis and luminescent properties of pure and doped ZnS nanoparticles", Journal of Alloys and Compounds, 402(2005) 274–277.

[7] J.F. Chen, Y.L. Li, Y.J. Yun, "Preparation and Characterization of Zinc Sulfate Nanoparticles Under High-gravity Environmental" , Mater. Res. Bull. 39, 185(2004).

[8] Torres-Martínez, C.L.; Kho, R.; Mian, O.I.; Mehra, R.K ," Efficient Photocatalytic Degradation of Environmental Pollutants with Mass-Produced ZnS Nanocrystals", J. Colloid Interface Sci.240, (2001) 525–532.

[9] Hamidi Raza,Omid khani, Mojtaba Shamsipur,Vahid Vatanpour,"High-performance pure and Fe3+-ion doped ZnS quantum dots as green nanophotocatalysts for the removal of malachite green under UV-light irradiation",J. Hazard. Mater. (2013) 250-251.

[10] Senapati U.S, Jha D.K and Sarkar D"Green Synthesis and Characterization of ZnS nanoparticles" Research Journal of Physical Sciences, 7(2013) 1-6.

[11] Sarma K., Sarma R. and Das H.L.,"STRUCTURAL CHARACTERIZATION OF THERMALLY EVAPORATED CdSe THIN FILMS" Chalcogenide Letters, 5, (2008) 153-163.

[12] Ramasamy V., Praba K. and Murugadoss G., " Study of optical and thermal properties in nickel doped ZnS nanoparticles using surfactants" Superlattices and Microstructures , 51, (2012) 699-714.

[13] Brus L.E., " Electron–electron and electronhole interactions in small semiconductor crystallites: The size dependence of the lowest excited electronic state "J.Chem.Phys, 80, (1984) 4403-4409.

[14] J. Sinclair and Dr. Dagotto, "An Introduction to Quantum Dots: Confinement, Synthesis, Artificial Atoms and Applications"Solid State II Lecture Notes, University of Tennessee, Knoxville, 2009.

[15] Denzler D., Olschewski M. and Sattler K, " Luminescence studies of localized gap states in colloidal ZnS nanocrystals", Journal of Applied Physics, 84, (1998)2841.