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Principal Component Analysis of the Effect of Batch Variation, TiO 2 Content and Reduction Temperature on the Surface Energy of TiO 2 /Graphene Oxide Membranes upon UV-C Activation
Topics in Catalysis ( IF 3.6 ) Pub Date : 2020-06-24 , DOI: 10.1007/s11244-020-01296-x
Kenneth R. Simonsen , Tanzila Sharker , Mette Rask , Radu M. Rosca , Gábor Köles , Morten L. K. Pedersen , Thomas R. Jensen , Morten E. Simonsen

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.



中文翻译:

UV-C活化时批数变化,TiO 2含量和还原温度对TiO 2 /氧化石墨烯膜表面能的影响的主成分分析

在这项工作中,主要成分分析(PCA)用于研究批料,还原温度,TiO 2含量和UV-C辐照对光敏TiO 2 / GO复合膜的表面能,极性和层间距的影响。成功开发了两种PCA模型。第一个PCA模型显示还原温度与d间距之间呈负相关。与在140°C下还原的膜相比,在160°C下获得的亲水性TiO 2 / GO膜较少。另外,通过添加更高的TiO 2含量,表面极性和表面能得到显着增强。第二个模型解释了UV-C活化对TiO 2表面能的影响/ GO复合膜。对于含有TiO 2的GO膜,在UV-C活化后观察到表面能和极性显着增加。此外,观察到TiO 2含量与UV-C活化后的表面能之间呈正相关。较高的TiO 2含量导致较高的表面能。没有发现由不同组制备的GO批料对TiO 2 / GO复合膜的性能有显着影响,表明该制备方法是相对稳定的。

更新日期:2020-06-24
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