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The effects of calcination on sol–gel synthesized Gd2Ti2O7 photocatalyst for degradation of Reactive Brilliant Red X-3B

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Abstract

Tetrabutylammonium hydroxide (TBAOH) was used as a template in the sol to synthesize Gd2Ti2O7. The effects of calcination temperature on the characteristics of the Gd2Ti2O7 samples were studied. The crystallite sizes of Gd2Ti2O7 prepared at 800, 900 and 1000 °C were calculated to be 33.5, 37.6 and 46.5 nm. The bandgap energies of the Gd2Ti2O7 samples were between 3.21 and 3.37 eV when the calcination temperature ranged from 600 to 1000 °C. The Gd2Ti2O7 sample obtained at 800 °C had the weakest photoluminescence intensity, i.e., the longest lifetime for the charge carriers. The amorphous samples had large surface area and pore volume but the crystallized Gd2Ti2O7 materials had apparently small values. The amorphous materials had very poor activity, and the Gd2Ti2O7 sample calcined at 800 °C had the strongest activity on RBR X-3B degradation.

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Acknowledgements

This work was supported by Basic Scientific Research Fund in Universities Supported by Education Department of Liaoning Province (LJKZ0234).

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Correspondence to Wenjie Zhang.

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Tang, Z., Yang, J. & Zhang, W. The effects of calcination on sol–gel synthesized Gd2Ti2O7 photocatalyst for degradation of Reactive Brilliant Red X-3B. Reac Kinet Mech Cat 135, 2867–2877 (2022). https://doi.org/10.1007/s11144-022-02274-y

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