was placed into water and oil brought out by wateradsorption. After that, the watersoaked TiO 2 –sodium alginate aerogel sank into the oil again. As displayed in
Fig. 12.26 h, the water-soaked TiO 2 –sodium alginate aerogel adsorbed oil lower
than the TiO 2 –sodium alginate aerogel (Fig. 12.26 c).
These results confirmed that the water affinity and excellent anti-penetrating
capability of TiO 2 –sodium alginate aerogel. These properties were significant after
60 times of reuse. Moreover, repeating oil/water separation experiments showed the
excellent reusability of sodium alginate and TiO 2 –sodium alginate aerogels
(Fig. 12.27). The separation efficiency decreased about 0.5 and 1.4% after
Fig. 12.26 The anti-oil-fouling performance of as-prepared TiO 2 –sodium alginate composite
(SAT) aerogel into pump oil. Reprinted with permission of (TiO 2 -alginate composite aerogels as
novel oil/water separation and wastewaterremediation filters, Dai et al., Elsevier)
Fig. 12.27 Separation efficiency of sodium alginate composite (SA) and TiO 2 –sodium alginate
composite (SAT) aerogels during recycling process. (Modified after Dai et al. 2019)
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