Synthesis of SiO2 NPs from Sodium Bentonite and their Use in Photocatalytic Activity and Adsorption Applications

Year 2025, Volume: 29 Issue: 3, 240 - 249, 26.06.2025

Abdulmuin Elkatuf Nurşah Kütük

https://doi.org/10.16984/saufenbilder.1587750

Abstract

Silica nanoparticles (SiO2 NPs) are a material that is used in many areas and are obtained by various methods and attracts the attention of researchers with its many properties such as photocatalysis, adsorbent and non-toxicity. In this study, sodium bentonite was used as a raw material to synthesize silica nanoparticles. In the FTIR results of the prepared SiO2 NPs, the Si-O-Si band indicating the formation of NPs is remarkable. The morphology structure was determined to be an agglomerated structure similar to a spherical form in SEM images. In the other part of the study, the photocatalytic degradation of methylene blue (MB) dye was investigated with SiO2 NPs. The results revealed that 80% degradation was achieved in 60 min and the process complied with the second order reaction kinetics. The effect of MB in aqueous solution was investigated for its use as an adsorbent. After 60 minutes, 90% dye removal was achieved and it was determined that the process fit pseudo-second-order kinetic model (PSO).

Keywords

SiO2 NPs, Sodium bentonite, Methylene blue, Photocatalytic activity, Adsorption

Supporting Institution

Tübitak 2209 A

Project Number

1919B012219481

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