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Effect of pH on material properties of ZnAl2O4:Cr3+ nano particles prepared by sol–gel method

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Abstract

ZnAl2O4 nanoparticles (NPs) doped with Cr3+ (1.0 mol%) were prepared by citric acid assisted sol–gel method at pH values of 3, 5, 7, 9, 11 and 13 with the use of ammonia as pH controller. Analysis of x-ray diffraction (XRD) spectra show that the synthesized ZnAl2O4 NPs are cubic structured and the pH did not affect the structure significantly. The average crystallite size increases with an increase in pH. The photoluminescence (PL) intensity was found to be minimum and maximum for the sample synthesized at pH 3 and pH 13, respectively. The PL emission intensity was found to depend on the synthesis pH conditions. The scanning electron microscope (SEM) revealed that the morphology of ZnAl2O4:Cr3+ NPs changed with the pH values of the solution. Ultraviolet–visible (UV–Vis) measurements show that reflectance is maximum in UV and visible region for sample synthesized under acidic pH of 5. The energy band gap energy was tuned from 3.10 to 3.88 eV with increase in pH value from 3 to 13. It was observed that a strong alkaline nature of the solution enhances the structural and optical properties of ZnAl2O4:Cr3+ nanostructures.

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References

  1. T.T. Loan, N.T. Thuy, N.N. Long, Synthesis and optical properties of ZnAl2O4:Cr3+, Tb3+ powders. Eur. Phys. J. Appl. Phys. 64, 10404 (2013)

    Article  Google Scholar 

  2. M. Zawadzki, Microwave hydrothermal synthesis of ZnAl2O4. Solid State Sci. 8, 14–18 (2006)

    Article  Google Scholar 

  3. S.G. Menon, D.N. Hebbar, S.D. Kulkarni, K.S. Choudhari, C. Santhosh, Facile synthesis and luminescence studies of nanocrystalline red emitting Cr:ZnAl2O4 phosphor. Mater. Res. Bull. 86, 63–71 (2017)

    Article  Google Scholar 

  4. S.V. Motloung, F.B. Dejene, O.M. Ntwaeaborwa, H.C. Swart, Effects of catalyst/zinc mole fraction on ZnAl2O4:0.01% Cr3+ nanocrystals synthesized using sol–gel process. Mater. Res. Express 1, 045029 (2014)

    Article  Google Scholar 

  5. W. Nie, F.M. Michel-Calendini, C. Linares, G. Boulon, C. Daul, New results on optical properties and term-energy calculations in Cr3+-doped ZnAl2O4. J. Lumin. 46(3), 177–190 (1990)

    Article  Google Scholar 

  6. W. Mikenda, N-lines in the luminescence spectra of Cr3+-doped spinels (I) identification of N-lines. J. Lumin. 26, 53–66 (1981)

    Article  Google Scholar 

  7. G. Samvit, S.G. Menon, K.S. Choudhari, S.A. Shivashankar, C. Santhosh, S.D. Kulkarni, Rapid annealing: a novel processing technique for Cr:ZnAl2O4 nanoparticles. J. Alloys Compd. 728, 484–489 (2017)

    Article  Google Scholar 

  8. R. Wahab, S.G. Ansari, Y.S. Kim, M. Song, H.-S. Shin, The role of pH variation on the growth of zinc oxide nanostructures. Appl. Surf. Sci. 255, 4891–4896 (2009)

    Article  Google Scholar 

  9. S.S. Alias, A.B. Ismail, A.A. Mohamad, Effect of pH on ZnO nanoparticle properties synthesized by sol–gel centrifugatio. J. Alloys Compd. 499, 231–237 (2010)

    Article  Google Scholar 

  10. P. Sagar, P.K. Shishodia, R.M. Mehra, Influence of pH value on the quality of sol–gel derived ZnO films. Appl. Surf. Sci. 253, 5419–5424 (2007)

    Article  Google Scholar 

  11. J. Ungula, B.F. Dejene, H.C. Swart, Effect of pH on the structural, optical and morphological properties of Ga-doped ZnO nanoparticles by reflux precipitation method. Phys. B 535, 251–257 (2018)

    Article  Google Scholar 

  12. G. Lakshminarayana, L. Wondraczek, Photoluminescenceandenergy transfer in Tb3+/Mn2+ co-doped ZnAl2O4 glass ceramics. J. Solid State Chem. 184, 1931–1938 (2011)

    Article  Google Scholar 

  13. J. Wrzyszcz, M. Zawadzki, J. Trawczynski, H. Grabowska, W. Mista, Some catalytic properties of hydrothermally synthesised zinc aluminate spinel. Appl. Catal. A 210, 263–269 (2001)

    Article  Google Scholar 

  14. J.J. Kingsley, K. Suresh, K.C. Patil, Combustion synthesis of fine-particle metal aluminates. J. Mater. Sci. 25, 1305–1312 (1990)

    Article  Google Scholar 

  15. S.K. Sharma, D. Gourier, T. Maldiney, B. Viana, E. Teston, D. Scherman, C. Richard, Persistent luminescence of AB2O4:Cr3+ (A = Zn, Mg, B = Ga, Al) spinels: new biomarkers for in vivo imaging. Opt. Mater. 36, 1901–1906 (2014)

    Article  Google Scholar 

  16. S.V. Motloung, F.B. Dejene, O.M. Ntwaeaborwa, H.C. Swart, Effects of catalyst/zinc mole fraction on ZnAl2O4:0.01% Cr3+ nanocrystals synthesized using sol–gel process. Mater. Res. Express 1, 045029 (2014)

    Article  Google Scholar 

  17. M.K. Hussen, F.B. Dejene, G.G. Gonfa, Effect of citric acid on material properties of ZnGa2O4:Cr3+ nanopowder prepred by sol-gel method. Appl. Phys. A 124, 390 (2018)

    Article  Google Scholar 

  18. S. Safa, R. Azimirad, S.S. Moghaddamc, M. Rabbanic, Investigating on performance of CuO micro and nanostructures prepared by different precursors. Desalin. Water Treat. 57, 6723–6731 (2016)

    Article  Google Scholar 

  19. M. Tsega, F.B. Dejene, Influence of acidic pH on the formulation ofTiO2 nanocrystalline powders with enhanced photoluminescence property. Heliyon 3, e00246 (2017)

    Article  Google Scholar 

  20. S.V. Motloung, F.B. Dejene, H.C. Swart, O.M. Ntwaeaborwa, Effects of Cr3+mol% on the structure and optical properties of the ZnAl2O4:Cr3+nanocrystals Synthesized using sol–gel process. Ceram. Int. 41, 6776–6783 (2015)

    Article  Google Scholar 

  21. L. F. Koao, F. B. Dejene, H. C. Swart Effect of pH on the properties of ZnO nanostructures prepared by chemical bath deposition method. Proceedings of SAIP2015, (2015) pp. 43–46. ISBN: 978-0-620-707145

  22. G. Rani, Annealing effect on the structural, optical and thermoluminescent properties of ZnAl2O4:Cr3+. Powder Technol. 312, 354–359 (2017)

    Article  Google Scholar 

  23. Miron and Grozescu, Hydrothermal synthesis of ZnAl2O4:Cr3+nanocrystals. Optoelectron. Adv. Mater. Rapid Commun. 6, 673–675 (2012)

    Google Scholar 

  24. M.K. Hussen, F.B. Dejene, Influence of annealing temprature on material properties of red emmiting ZnGa2O4:Cr3+ nano structures. J. Sol-Gel. Sci. Technol. 88, 454–464 (2018)

    Article  Google Scholar 

  25. M.K. Hussen, F.B. Dejene, Effect of Cr3+ doping on structural and optical property of ZnGa2O4 synthesized by sol gel method. Optik 181, 514–523 (2018)

    Article  Google Scholar 

Download references

Acknowledgement

The authors would like to acknowledge and appreciate the financial support from the Ministry of science and higher education (Ethiopia) and National Research Foundation (NRF) South Africa.

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Authors and Affiliations

  1. Department of Physics, University of the Free State (Qwaqwa Campus), Private Bag X13, Phuthaditjhaba, 9866, South Africa

    Megersa K. Hussen & Francis B. Dejene

  2. Department of Physics, College of Science, Bahir Dar University, 3019, Bahir Dar, Ethiopia

    Moges Tsega

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  1. Megersa K. Hussen
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  2. Francis B. Dejene
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  3. Moges Tsega
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Correspondence to Megersa K. Hussen.

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Hussen, M.K., Dejene, F.B. & Tsega, M. Effect of pH on material properties of ZnAl2O4:Cr3+ nano particles prepared by sol–gel method. J Mater Sci: Mater Electron 30, 10191–10201 (2019). https://doi.org/10.1007/s10854-019-01355-4

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