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Zn0.97M0.03O (M = Co, Fe, and V) pigments: thermal, structural, and optical characterization

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Abstract

Zinc oxide is a widely used white inorganic pigment. Transition metal ions are used as chromophores and originate the ceramic pigments group. In this context, ZnO particles doped with Co, Fe, and V were synthesized by the polymeric precursors method, Pechini method. Differential scanning calorimetry (DSC) and thermogravimetry (TG) techniques were used to accurately characterize the distinct thermal events occurring during synthesis. The TG and DSC results revealed a series of decomposition temperatures due to different exothermal events, which were identified as H2O elimination, organic compounds degradation and phase formation. The samples were structurally characterized by X-Ray diffractometry revealing the formation of single phase, corresponding to the crystalline matrix of ZnO. The samples were optically characterized by diffuse reflectance measurements and colorimetric coordinates L*, a*, b* were calculated for the pigment powders. The pigment powders presented a variety of colors ranging from white (ZnO), green (Zn0.97Co0.03O), yellow (Zn0.97Fe0.03O), and beige (Zn0.97V0.03O).

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Acknowledgements

The authors also gratefully acknowledge the financial support of the Brazilian research funding agencies FAPESP, CAPES, and CNPq.

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Authors and Affiliations

  1. Departamento de Química, UFSCar—Universidade Federal de São Carlos, Rodovia Washington Luiz, Km 235, São Carlos, SP, 13565-905, Brazil

    T. M. Milão & J. F. A. Oliveira

  2. Instituto de Física de São Carlos, USP—Universidade de São Paulo, Av. Trabalhador São-carlense, 400, São Carlos, SP, 13560-970, Brazil

    V. D. Araújo & M. I. B. Bernardi

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  1. T. M. Milão
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  2. J. F. A. Oliveira
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  3. V. D. Araújo
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  4. M. I. B. Bernardi
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Correspondence to T. M. Milão.

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Milão, T.M., Oliveira, J.F.A., Araújo, V.D. et al. Zn0.97M0.03O (M = Co, Fe, and V) pigments: thermal, structural, and optical characterization. J Therm Anal Calorim 103, 873–877 (2011). https://doi.org/10.1007/s10973-010-1107-z

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  • DOI: https://doi.org/10.1007/s10973-010-1107-z

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