Abstract
Nanometric TiO2 and nickel-doped TiO2 powders were obtained by thermal decomposition of non-alkoxide precursors prepared using an ultrasonic-assisted sol–gel method. Ti4+ and Ni2+ were obtained from titanium oxide sulfate hydrate and nickel sulfate hexahydrate, respectively. X-ray powder diffraction and Raman spectroscopy confirmed the formation of only the anatase phase in both oxides, and no titanates were observed. The Ni-doped material was determined to be a solid solution with a stoichiometry of Ti0.96Ni0.04O2−y. The incorporation of nickel lowers the band gap calculated from the UV–Vis diffuse reflectance spectroscopic data, and affects the specific surface area, density, and acid–base characteristics. Mesoporosity developed as a result of particle agglomeration and differed among samples, as determined based on the total pore volume.
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Acknowledgments
MJRA wishes to acknowledge the Grant (83059) received from CONACyT. The authors gratefully acknowledge financial support for the MEAM-EXC-10G project from VIEP-UAP. The current work was supported in part by CONACyT research projects CB-2008-01-100439, I0110/127/08 and Project MEX 08/005 (BMBF, Germany). The authors wish to thank Dr. M. González-Perea (FCQ-UAP) and M.Sc. Erik Reyes (CUVyTT-UAP) for performing the FTIR and AFM analysis, respectively.
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Robles-Águila, M.J., Mendoza, M.E., Dávila-Jiménez, M.M. et al. Influence of Ni doping on the structural, optical and textural properties of TiO2 nanocrystals prepared via an ultrasound assisted sol–gel method. J Sol-Gel Sci Technol 69, 571–579 (2014). https://doi.org/10.1007/s10971-013-3258-4
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DOI: https://doi.org/10.1007/s10971-013-3258-4