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Synthesis, Structural, Optical Properties and Antibacterial activity of co-doped (Ag, Co) ZnO Nanoparticles

Author Affiliations

  • 1Department of Physics, Sri Venkateswara University, Tirupati 517502, Andhra Pradesh, INDIA
  • 2Center for Nanoscience and Engineering (CeNSE), Indian Institute of Science, Bangalore-560 012, INDIA
  • 3Department of Microbiology, Sri Venkateswara University, Tirupati-517 502, A.P., INDIA

Res. J. Material Sci., Volume 1, Issue (1), Pages 11-20, February,16 (2013)


In this paper, undoped ZnO and 5 mol% of Ag, 5 mol% of Co individually doped and co-doped (Ag, Co) ZnO nanopowders were synthesized by chemical co-precipitation method and their structural, morphological, optical properties and antibacterial activity were studied. Crystal structure and grain size were characterized by X-ray diffractometer and reveals that all synthesized ZnO samples were hexagonal structure and the sizes of ZnO nanoparticles were 23 nm, 20 nm, 17 nm, and 25 nm for undoped ZnO, 5 mol% of Co doped, 5 mol% of Ag doped and co-doped (Ag, Co) ZnO nanoparticles respectively. Field emission scanning electron microscopy (FESEM) and Transmission electron microscope (TEM) characterizations were used to determine the morphology and size of the ZnO nanoparticles. TEM results were in good agreement with the X-rd results. Energy dispersive analysis of X-rays spectroscopy (EDAX) spectrum indicates that the successful dopants of Ag, Co peaks in the ZnO lattice and which indicates the purity of the samples. Optical properties of the ZnO samples were characterized by UV-Vis Diffuse Reflectance spectrophotometer. The antibacterial activity test was carried out via well diffusion method, and antibacterial activity of the prepared samples of undoped, Co doped, Ag doped and co-doped (Ag, Co) ZnO nanoparticles were reported, against pathogenic organisms like Pseudomonas, Klebshiella, Aspergillus and Candida. The co-doped (Ag, Co) ZnO nanoparticles show twice as potent in killing as against those pathogenic organisms compared to undoped ZnO and was also more effective than the single element Ag doped, Co doped ZnO nanoparticles. The present study indicates that single element doped and co-doped ZnO nanoparticles could potentially be antibacterial reagents to treat diseases caused by bacteria and fungi.


  1. Ezenwa I.A., Synthesis and optical characterization of zinc oxide thin film, Research Journal of Chemical Sciences,2(3), 26-30 (2012)
  2. Yang H.M., Nie S., Preparation and characterization of Co-doped ZnO nonmaterial’s, Mater.Chem. Phys., 114, 279-282 (2009)
  3. Yang M., Guo Z.X., Qiu K.H., Long J.P., Yin G.F., Guan D.G., Liu S.T., Zhou S.J., Synthesis and characterization of Mn-doped ZnO column arrays, Appl. Surf. Sci., 256, 4201- 4205. (2010)
  4. Irimpan L., Nampoori V.P.N., Radhakrishnan., Spectral and nonlinear optical characteristics of nanocomposites of ZnO- Ag, Chemical Physics Letters., 455, 265-269 (2008)
  5. Nakada T., Hirabayashi Y., Tokado T., Ohmori D., Mise T., Novel device structure for Cu (In, Ga) Se thin film solar cells using transparent conducting oxide back and front contacts, Sol. Energy., 77, 739 -749 (2004)
  6. Konenkamp R., Word, R.C., Schlegel, C., Vertical nanowire light-emitting diode, Appl. Phys. Let., 85, 6004-6006 (2004)
  7. Jones, N., Ray, B., Ranjit, K.T., Manna, A.C., Antibacterial activity of ZnO nanoparticle suspensions on a broad spectrum of microorganisms, Fem. Microbial. Lett. 279, 71-76 (2008)
  8. Tam, K.H., Djurisic, A.B., C.M.N. Chan, C.M.N., Xi, Y.Y., Tse, C.W., Leung, Y.H., Chan, W.K., Leung, F.C.C., Au, D.W.T., Antibacterial activity of ZnO nanorods prepared by a Hydrothermal method, Thin Solid Films., 516, 6167 -6174 (2008)
  9. Zhang, L., Ding, Y., Povey, M., York, D., ZnO nanofluids a potential Antibacterial agent, Prog. Nat. Sci., 18, 939-944 (2008)
  10. Sehili, T., Boule, P. Lemaire, J., Photocatalysed transformation of chloroaromatic derivatives on zinc oxide II: Dichlorobenzenes, J. Photochem. Photobiol. A 50, 103-116 (1989)
  11. Villasenor, J., Reyes, P., Pechhi, G., Photodegradation of Pentachloro Phenol on ZnO, J. Chem. Technol. Biotechnol., 72, 105-110 (1998)
  12. Driessen, M.D., Miller, T.M., Grassian, V.H., Photocatalytic oxidation of trichloroethylene on zinc oxide: characterization of surface-bound and gas-phase products and intermediates with FT-IR spectroscopy, J. Mol. Catal., A131, 149-156 (1998)
  13. Georgekutty, R., Seery, M.K., Pillai, S.C., A Highly Efficient Ag-ZnO Photocatalyst: Synthesis, Properties, and Mechanism, J. Phys. Chem. C., 112, 13563-13570 (2008)
  14. Zheng, Y., Chen, C., Zhan, Y., Lin, X., Zheng, Q., Wei, K., Zhu, J., Photocatalytic Activity of Ag/ZnO Heterostructure Nanocatalyst: Correlation between Structure and Property, J. Phys. Chem.C.112, 10773 -10777 (2008)
  15. Ye X-Y., Zhou Y-M., Sun Y-Q., Chen J., Wang Z-Q., Preparation and characterization of Ag/ZnO composites via a simple hydrothermal route, J. Nanopart. Res. 11, 1159-1166 (2009)
  16. Palkar, V.R., 1999, Sol-gel derived nanostructured alumina porous spheres as an adsorbent in liquid chromatography, Nanostruct. Mater, 11, 369-374 (1999)
  17. Park, H.K., Kim, D.K., Kim, C.H., Effect of Solvent on Titania Particle Formation and Morphology in Thermal Hydrolysis of TiCl4, J. Am. Ceram. Soc.,80, 743-749 (1997)
  18. Nirmala, M., Anukaliani, A., Characterization of undoped and Co doped ZnO nanoparticles synthesized by DC thermal plasma methodPhysica B, 406, 911- 915 (2011)
  19. Zhang, Y., Shi, E.W., Chen, Z.Z., Magnetic properties of different temperature treated Co- and Ni-doped ZnO hollow nanospheres, Mater. Sci. Semicond. Process, 13, 132-136 (2010)
  20. Sankara Reddy B., Venkatramana Reddy S., Venkateswara Reddy P., Koteeswara Reddy N., Optoelectronics and Advanced Materials – Rapid Communications, , 953 - 959 (2012)
  21. Pal, B., and Giri, P.K., High temperature ferromagnetism and optical properties of Co doped ZnO nanoparticles, J. Appl. Phys. 108, 084322-1 - 084322- 8 (2010)
  22. Zeferino, R.S., Flores, M.B. and Pal, U., Photoluminescence and Raman scattering in Ag-doped ZnO nanoparticles, J. Appl. Phys. 109, 014308-1 - 014308 -6 (2011)
  23. Ahmed F., Kumar S., Arshi N., Anwar M.S., Koo B.H., Lee C.G., Doping effects of Co2+ions on structural and magnetic properties of ZnO nanoparticles, Microelectronic Engineering89, 129-132 (2012)
  24. Ullah R., Dutta J., Photocatalytic degradation of organic dyes with manganese-doped ZnO nanoparticles, Journal of Hazardous Materials 156, 194-200 (2008)
  25. Xiao Q., Zhang J., Xiao C., Tan X.,Photocatalytic decolorization of methylene blue over Zn1-xCoO under visible irradiation, Materials Science and Engineering: B,142, 121-125 (2007)
  26. Li P., Wang S., Li J., Wei Y., Structural and optical properties of Co doped ZnO nanocrystals prepared by a one step solution route, Journal of Luminescence, 132, 220-225 (2012)
  27. Sharma V.K., Yngard R.A., Lin Y., Silver nanoparticles: Green synthesis and their antimicrobial activities, Advances in colloid and Interface Science., 145, 83-96 (2009)
  28. Narayanan P.M., Wilson W.S., Abraham A.T., Sevanan M., Synthesis, Characterization, and Antimicrobial Activity of Zno Nanoparticles Against Human Pathogens, BioNanoSci. DOI 10.1007/s12668-012-0061-6
  29. Gondal M.A., Alzahrani A.J., Randhawa M.A., Siddiqui M.N., Morphology and antifungal effect of nano ZnO and nano pd doped ZnO against Aspergillus and Candida, J. Environ. Sci and Health, Part A47, 1413 -1418 (2012)