Effect of Different Calcination Temperatures on the Structural and Photocatalytic Performance of Bi-TiO2SBA-15

Abstract EN

The new novel material Bi-TiO2/SBA-15 was synthesized by an easy wet impregnation method.

A combination of XRD, XPS, Raman, N2 adsorption-desorption isotherm measurement, TEM, and solid state UV-Vis spectroscopy has been used to characterize the Bi-TiO2/SBA-15 material.

It was found that SBA-15 retained the ordered hexagonal mesostructure after incorporation of TiO2 and Bi.

The photodecomposition of rhodamine B (RhB) in aqueous medium was selected to evaluate the photocatalytic performance of Bi-TiO2/SBA-15 under visible light irradiation (λ≥420 nm).

The experiment results indicated that Bi-TiO2/SBA-15 exhibited higher photocatalytic activities than pure TiO2 and Bi2O3.

The influences of calcination temperature were studied.

It strongly influenced the activity of the samples.

The sample calcined at 550°C shows the highest photocatalytic activity in the decomposition of RhB under visible light.

The catalyst preserved almost its initial photocatalytic activity after six reuses.