Friday, February 06, 2015

Solvothermal synthesis of stable nanoporous polymeric bases-crystalline TiO 2 nanocomposites: visible light active and efficient photocatalysts for water treatment

Visible light active and stable nanoporous polymeric base–crystalline TiO 2 nanocomposites were solvothermally synthesized from in situ copolymerization of divinylbenzene (DVB) with 1-vinylimidazolate (VI) or 4-vinylpyridine (Py) in the presence of tetrabutyl titanate without the use of any other additives (PDVB-VI-TiO 2 - x , PDVB-Py-TiO 2 - x , where x stands for the molar ratio of TiO 2 to VI or Py), which showed excellent activity with respect to catalyzing the degradation of organic pollutants of p -nitrophenol (PNP) and rhodamine-B (RhB). TEM and SEM images show that PDVB-VI-TiO 2 - x and PDVB-Py-TiO 2 - x have abundant nanopores, and TiO 2 nanocrystals with a high degree of crystallinity were homogeneously embedded in the PDVB-VI-TiO 2 - x and PDVB-Py-TiO 2 - x , forming a stable ‘brick-and-mortar’ nanostructure. PDVB-VI and PDVB-Py suppo...

Fujian Liu, Weiping Kong, Liang Wang, Iman Noshadi, Zhonghua Zhang and Chenze Qi

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