Recyclable mesoporous TiO2 adsorbent with adjustable surface electrical property as well as preparation method and application thereof

The invention discloses a recyclable mesoporous TiO2 adsorbent with adjustable surface electrical property as well as a preparation method and application thereof. The preparation method comprises thefollowing steps: (1) uniformly mixing isopropanol and deionized water, adding an acidic solution or an alkaline solution into the mixture, and conducting stirring to obtain a solution I; (2) adding an titanium diisopropoxide bis(acetylacetonate) into the solution I, and conducting uniform stirring and centrifuging; and (3) cleaning the precipitate centrifuged in the step (2) with deionized waterand isopropanol, and then conducting drying and grinding to obtain the mesoporous TiO2 adsorbent. The mesoporous TiO2 adsorbent prepared by the invention not only has a large specific surface area, but also has rich active functional groups on the surface, and the surface electrical property of the mesoporous TiO2 adsorbent can be adjusted by adjusting the pH value of a solution in the preparationprocess, so that the mesop