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Principal Component Analysis of the Effect of Batch Variation, TiO2 Content and Reduction Temperature on the Surface Energy of TiO2/Graphene Oxide Membranes upon UV-C Activation

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Abstract

In this work principal component analysis (PCA) was used to study the effect of batch, reduction temperature, TiO2 content and UV-C irradiation on the surface energy, -polarity and interlayer spacing of photoactive TiO2/GO composite membranes. Two PCA models were successfully developed. The first PCA model shows a negative correlation between reduction temperature and d-spacing. Less hydrophilic TiO2/GO membranes were obtained at 160 °C compared to membranes reduced at 140 °C. Also, the surface polarity and surface energy were significantly enhanced by the addition of higher TiO2 content. The second model explain the effect of UV-C activation on the surface energy of the TiO2/GO composite membranes. For the GO membranes containing TiO2 a significant increase in surface energy and -polarity was observed after UV-C activation. Moreover, a positive correlation between the TiO2 content and surface energy after UV-C activation was observed. Higher TiO2 content results in higher surface energy. GO batches prepared by different groups was not found to significantly affect the properties of the TiO2/GO composite membranes suggesting that the preparation method is relative robust.

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Correspondence to Morten E. Simonsen.

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Simonsen, K.R., Sharker, T., Rask, M. et al. Principal Component Analysis of the Effect of Batch Variation, TiO2 Content and Reduction Temperature on the Surface Energy of TiO2/Graphene Oxide Membranes upon UV-C Activation. Top Catal 64, 806–816 (2021). https://doi.org/10.1007/s11244-020-01296-x

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