Understanding the effect of the calcination process on the structure of mesoporous silica zirconia photocatalysts for Bisphenol A degradation
Keywords:Calcination process, Microwave, Silica-zirconia, Bisphenol A
The mesoporous silica zirconia (m- SiO2/ZrO2) was successfully synthesized in this study using a microwave method, and the effect of the calcination process was studied. In this study, half of the sample was left untreated (labeled "untreated sample"), while the other half was calcined at 850 °C for 3 hours in an air atmosphere in a muffle furnace to remove the surfactant. X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible differential reflectance spectroscopy, nitrogen adsorption-desorption spectroscopy, and electron spin resonance spectroscopy were utilized in order to analyze the catalysts that were produced. The findings from the characterization showed that the calcination procedure caused the creation of oxygen vacancies and increased the surface area, both of which affected the photocatalytic activity. The photocatalytic activity of the calcined m-SiO2/ZrO2 (80%) catalyst was superior to that of the untreated m-SiO2/ZrO2 (19%) catalyst. Zirconia's greater surface area and its natural occurrence in the tetragonal phase are both to blame for this phenomenon. In addition, there is the possibility that a greater proportion of oxygen vacancy will result in a smaller band gap and a lower electron-hole recombination rate. After five cycles, the photocatalytic activity exhibited by both catalysts remained unchanged.
How to Cite
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The Malaysian Journal of Catalysis publishes open access articles under the terms of theÂ Creative Commons Attribution (CC BY) LicenseÂ which permits use, distribution and reproduction in any medium, provided the original work is properly cited.Â
The Department of Chemistry, Faculty of Science, UTM retains the Copyright on any research article published by Malaysian Journal of Catalysis.
Authors grant Malaysian Journal of CatalysisÂ a license to publish the article and identify itself as the original publisher.