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2014 | Vol. 14, nr 4(42) | 49--60
Tytuł artykułu

Characterisation and optical studies of copper oxide nanostructures doped with lanthanum ions

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Copper Oxide is an extensively studied group II-VI semiconductor with optical properties. It exhibits a wide variety of morphologies in the nano regime that can be grown by tuning the growth habit of the CuO crystal. CuO nano materials with an average particle size of 15-27 nm are synthesized by chemical route. XRD, SEM, FTIR UV-Vis and EDS characterize the samples. The percentage of doping material is confirmed from the EDS spectra. The average crystal size of the prepared CuO: La nanopowder is determined by XRD. The UV absorption spectra revealed the absorption edge at wavelength 389 nm indicating the smaller size of CuO:La nano particle. The optical direct band gap energy of doped CuO nanoparticle is found to be in the range 3.149 eV. The increasing red shift with decreasing particle size suggests that the defects responsible for the intra gap states are primarily surface defect. The La doped CuO is highly effective and can significantly enhance the photo catalytic degradation.
Wydawca

Rocznik
Strony
49--60
Opis fizyczny
Bibliogr. 28 poz., wykr., tab., rys.
Twórcy
autor
  • Department of Physics, Catholicate College, Pathanamthitta, Kerala, India -689645
autor
  • Department of Physics, Catholicate College, Pathanamthitta, Kerala, India -689645
autor
  • Department of Chemistry, St. Cyril’s College, Adoor, Kerala
Bibliografia
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  • 9. Abaker M., Umar, A. Baskoutas S., Kim S.H., Hwang S.W., in: Structural and optical properties of CuO layered hexagonal discs synthesized by a low-temperature hydro-thermal process, J. Phys. D: Appl. Phys. 44 (2011), 155
  • 10. Williamson G.K., Hall W.H, in: X-ray line broadening from filed Aluminum and wolfram, Acta Metall. 1 (1953), 22.
  • 11. Moss M.A. Burrell T.S, Ellis G.J., in: Semiconductor Opto-Electronics, Butterworth & Co. Ltd, 1973.
  • 12. Honsi H.M., Fayek S.A., El-Sayed S.M., Roushdy M., in: Optical properties and DC electrical conductivity of Ge28−xSe72Sbx thin films, Vacuum 81 (2006), 54.
  • 13. Sawaby A., Selim M.S., Marzouk S.Y., Mostafa M.A. Hosny A, in: Structure, optical and electrochromic properties of NiO thin films”, Physica B 405 3412 (2010).
  • 14. Ken Ohwade and Ginji Pujiswas in: Optical vibration of doped Lanthanum Copper Oxide compound, Applied Spectroscopy, 47, 3(1993), 296-99.
  • 15. Golosovsky I.V ,Gukasov A.G,Polyakov V.A, in : nonlinear anti- ferromagnetic structure with the propagation vector and the transition temperature of 130K was found in monoclinic compound La2Cu2O5 by single crystal neutron diffraction, J Phys-Condensed Matter,11,36(1999)6959-67
  • 16. Neeleshwar S, Chen C.L, Tsai C.B., Chen Y.Y., Chen C.C., Shyu S.G., Seehra M.S., in: dependent properties of CdSe quantum dots, Phys. Rev. B 71 (2005) 201,307
  • 17. Nanda K K., Kruis F E., Hassan H., Phys.Rev.Lett. 89 (2002) 256103.
  • 18. Gizhevskii B.A., Sukhorukov Y.P., Moskvin. A.S.,Loshkareva N.N., Mostovshchikova E.V., Ermakov A.E., Kozlov E.A., Uimin M.A., Gaviko V.S in : Anomalies in the Optical properties of Nanocrystalline Copper Oxides CuO and Cu2O near the fundamental absorption edge, JETP 102 (2006) 297.
  • 19. Sukhorukov Y.P., Gizhevskii B.A., Mostovshchikova E.V., Yermakov A.Y., Tugushev S.N., Kozlov E.A., in: Nano-crystalline Copper Oxide for selective solar energy absorbers, Tech. Phys.Lett. 32 (2006) 132.
  • 20. Ovchinnikov S.G., Gizhevskii B.A, Sukhorukov Y.P., Ermakov A.E., Uimin M.A., Kozlov E.A., Kotov Y., Bagazeev A.A.V, in: Specific features of the electronic structure and optical spectra of nanoparticles with strong electron correlations, Phys. Solid State 49 (2007), 1116
  • 21. Rehman S., Mumtaz A Hasanain S.K., in: Size effects on the Magnetic and Optical properties of CuO nanoparticles”, J. Nanopart. Res. 13 (2011), 2497.
  • 22. Koffyberg F.P., Benko F.A., in: A Photoelectrochemical determination of the position of the conduction and valence band edges of p‐type CuO , J. Appl. Phys. 53 (1982), 1173.
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  • 24. Sukhorukov Y.P., Gizhevskii B.A., Mostovshchikova E.V., Yermakov A.Y., Tugushev S.N., Kozlov E.A.,in: Nano-crystalline Copper Oxide for selective solar energy absorbers, Tech. Phys.Lett. 32 (2006), 132.
  • 25. Ovchinnikov S.G., Gizhevskii B.A., Sukhorukov Y.P., Ermakov A.E., Uimin A., Kozlov E.A., Kotov Y.,Bagazeev A.A.V.,in: Specific features of the Electronic structure and Optical spectra of nanoparticles with strong electron correlations, Phys. Solid State 49 (2007) 1116.
  • 26. Koffyberg F.P., Benko F.A.,in: A photoelectrochemical determination of the position of the conduction and valence band edges of p‐type CuO , J. Appl. Phys. 53 (1982), 1173.
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  • 28. Kannaki k,Remesh PS, Hydrothermal synthesisi of CuO Nanostructure and their charactgerisation, In.J. of Scientific & Engg.Res. 3,9 (2012), 1-4
Typ dokumentu
Bibliografia
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Identyfikator YADDA
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