Photo-Catalytic Activity of Ca1-xNixS  Nanocrystals

Rupali Sood; Barinder Singh; Dinesh Kumar; H. S. Bhatti; Karamjit Singh

doi:10.4236/opj.2015.57020

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Optics and Photonics Journal > Vol.5 No.7, July 2015

Photo-Catalytic Activity of Ca_1-xNi_xS Nanocrystals ()

Rupali Sood, Barinder Singh, Dinesh Kumar, H. S. Bhatti^*, Karamjit Singh

Department of Physics, Punjabi University, Patiala, India.

DOI: 10.4236/opj.2015.57020 PDF HTML XML 3,664 Downloads 4,039 Views

Abstract

Ca_1-xNi_xS (0 ≤ x ≤ 0.05) nanocrystals have been synthesized by facile solid state reaction method. Synthesized nanocrystals are further etched with mild acid solutions to reduce the particle size, which augments the surface to volume ratio and confinement of carriers. Crystallographic and morphological characterizations of synthesized nanomaterials have been done by X-ray diffraction and electron microscopy, respectively. Comparison of the diffraction and electron microscopy studies reveal the formation of single crystalline nanostructures. Optical characterization of synthesized nanomaterials has been done by UV-vis. absorption spectroscopic studies. The photo-catalytic activity of synthesized nanomaterials under UV irradiation has been tested using methylene blue (MB) dye as a test contaminant in aqueous media. Photo-catalytic behaviour dependence on dopant concentration and etching has been thoroughly studied to explore the potential of synthesized nanomaterials for next era optoelectronic industrial applications as well as polluted water purification.

Keywords

Ca_1-xNi_xS Nanocrystals, Crystallography, Morphology, Photo-Catalytic Activity

Share and Cite:

Sood, R. , Singh, B. , Kumar, D. , Bhatti, H. and Singh, K. (2015) Photo-Catalytic Activity of Ca_1-xNi_xS Nanocrystals. Optics and Photonics Journal, 5, 205-211. doi: 10.4236/opj.2015.57020.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Ranfagni, A., Fabeni, P., Pazzi, G.P. and Mugnai, D. (1993) Anomalous Pulse Delay in Microwave Propagation: A Plausible Connection to the Tunneling Time. Physical Review E, 48, 1453. http://dx.doi.org/10.1103/PhysRevE.48.1453
[2]	Bol, A.A., Beek, R.V. and Meijerink, A. (2002) On the Incorporation of Trivalent Rare Earth Ions in II-VI Semiconductor Nanocrystals. Chemistry of Materials, 14, 1121-1126. http://dx.doi.org/10.1021/cm011195s
[3]	Singh, K., Kumar, S., Verma, N.K. and Bhatti, H.S. (2009) Photoluminescence Properties of Eu3+-Doped Cd_1-xZn_xS Quantum Dots. Journal of Nanoparticle Research, 11, 1017-1021. http://dx.doi.org/10.1007/s11051-009-9586-1
[4]	Chitkara, M., Singh, K., Sandhu, I.S. and Bhatti, H.S. (2011) Photo-Catalytic Activity of Zn_1-xMn_xS Nanocrystals Synthesized by Wet Chemical Technique. Nanoscale Research Letters, 6, 438. http://dx.doi.org/10.1186/1556-276X-6-438
[5]	Kumar, D., Singh, K., Kaur, G., Verma, V. and Bhatti, H.S. (2015) Synthesis and Optical Characterization of Pure and Cobalt Doped Gallium Nitride Nanocrystals. Journal of Materials Science: Materials in Electronics. http://link.springer.com/article/10.1007/s10854-015-3184-z
[6]	Rossetti, R., Hull, R., Gibson, J.M. and Brus, L.E. (1985) Excited Electronic States and Optical Spectra of ZnS and CdS Crystallites in the ≈15 to 50 Å Size Range: Evolution from Molecular to Bulk Semiconducting Properties. Journal of Chemical Physics, 82, 552. http://dx.doi.org/10.1063/1.448727
[7]	Brus, L. (1986) Electronic Wave Functions in Semiconductor Clusters: Experiment and Theory. Journal of Physical Chemistry, 90, 2555-2560. http://dx.doi.org/10.1021/j100403a003
[8]	Henglein, A. (1989) Small-Particle Research: Physicochemical Properties of Extremely Small Colloidal Metal and Semiconductor Particles. Chemical Reviews, 89, 1861-1873. http://dx.doi.org/10.1021/cr00098a010
[9]	Wang, Y. and Herron, N. (1991) Nanometer-Sized Semiconductor Clusters: Material Synthesis, Quantum Size Effects and Photophysical Properties. Journal of Physical Chemistry, 95, 525. http://dx.doi.org/10.1021/j100155a009
[10]	Alivisatos, A.P. (1996) Perspectives on the Physical Chemistry of Semiconductor Nanocrystals. Journal of Physical Chemistry, 100, 13226-13239. http://dx.doi.org/10.1021/jp9535506
[11]	Pham-Thi, M. (1995) Rare-Earth Calcium Sulfide Phosphors for Cathode Ray Tube Displays. Journal of Alloys & Compounds, 225, 547-551. http://dx.doi.org/10.1016/0925-8388(94)07060-1
[12]	Marwaha, G.L., Singh, N., Vij, D.R. and Mathur, V.K. (1979) CaS: Bi as U.V. Dosimeter. Materials Research Bulletin, 14, 1489-1495. http://dx.doi.org/10.1016/0025-5408(72)90217-6
[13]	Marwaha, G.L., Singh, N. and Mathur, V.K. (1980) Spectral Variations and Retrapping Processes in CaS: Bi Dosimeter. Radiation Effects, 53, 25-31. http://dx.doi.org/10.1080/00337578008207092
[14]	Marwaha, G.L., Singh, N., Nagpal, J.S. and Mathur, V.K. (1981) Operational Importance of Some Physical Parameters of TL Phosphor CaS: Bi. Radiation Effects, 55, 85-90. http://dx.doi.org/10.1080/00337578108225469
[15]	Hutt, G. and Jaek, I. (1996) Optically Stimulated Luminescence Materials Based on CaS for Gamma and Fast Neutron Dosimetry. Radiation Protection Dosimetry, 65, 297-300. http://dx.doi.org/10.1093/oxfordjournals.rpd.a031645
[16]	Kumar, V., Kumar, R., Lochab S.P. and Singh, N. (2007) Swift Heavy Ion Induced Structural Modification and Photo-Luminescence in CaS: Bi Nanophosphors. Journal of Nanoparticle Research, 9, 661-667. http://dx.doi.org/10.1007/s11051-006-9189-z
[17]	Kumar, V., Kumar, R., Lochab, S.P. and Singh, N. (2006) Thermoluminescence and Dosimetric Properties of Bismuth Doped Cas Nanocrystalline Phosphor. Radiation Effects & Defects in Solids, 161, 479-485. http://dx.doi.org/10.1080/10420150600800597
[18]	Kumar, V., Singh, N., Kumar, R. and Lochab, S.P. (2006) Synthesis and Characterization of Bismuth Doped Calcium Sulfide Nanocrystallites. Journal of Physics: Condensed Matter, 18, 5029. http://dx.doi.org/10.1088/0953-8984/18/22/003
[19]	Sharma, G., Chawla, P., Lochab, S.P. and Singh, N. (2009) Thermoluminescence Characteristics of CaS: Ce Nanophosphors. Chalcogenide Letters, 6, 705.
[20]	Singh, V., Rao, T.K.G., Zhu, J.J. and Tiwari, M. (2006) Luminescence and Defect Studies of Ce3+ Doped CaS Phosphor Synthesized via Solid State Diffusion Method. Material Science and Engineering: B, 131, 195-199. http://dx.doi.org/10.1016/j.mseb.2006.04.015
[21]	Cullity, B.D. (1978) Elements of X-Ray Diffraction. Addison-Wesley Publishing Company, Boston, 102.