文献类型：期刊文献

英文题名：Solvothermal synthesis of stable nanoporous polymeric bases-crystalline TiO2 nanocomposites: Visible light active and efficient photocatalysts for water treatment

作者：Liu, Fujian[1,2]; Kong, Weiping[1]; Wang, Liang[2]; Noshadi, Iman[3]; Zhang, Zhonghua[3]; Qi, Chenze[1]

机构：[1] Key Laboratory of Alternative Technologies for Fine Chemicals Process of Zhejiang Province, Department of Chemistry, Shaoxing University, Shaoxing, 312000, China; [2] Department of Chemistry, Zhejiang University [XiXi Campus], Hangzhou, 310028, China; [3] Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT, 06269, United States

年份：2015

卷号：26

期号：8

外文期刊名：Nanotechnology

收录：EI(收录号：20150700507759)、Scopus(收录号：2-s2.0-84922383188)

语种：英文

外文关键词：Organic pollutants - Water pollution - Nanocomposites - Water treatment - Crystalline materials - Nanocrystals - Nanopores - Energy gap - Light

外文摘要：Visible light active and stable nanoporous polymeric base-crystalline TiO2 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-TiO2-x, PDVB-Py-TiO2-x, where x stands for the molar ratio of TiO2 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-TiO2-x and PDVB-Py-TiO2-x have abundant nanopores, and TiO2 nanocrystals with a high degree of crystallinity were homogeneously embedded in the PDVB-VI-TiO2-x and PDVB-Py-TiO2-x, forming a stable 'brick-and-mortar' nanostructure. PDVB-VI and PDVB-Py supports act as the glue linking TiO2 nanocrystals to form nanopores and constraining the agglomeration of TiO2 nanocrystals. XPS spectra show evidence of unique interactions between TiO2 and basic sites in these samples. UV diffuse reflectance shows that PDVB-VI-TiO2-x and PDVB-Py-TiO2-x exhibit a unique response to visible light. Catalytic tests show that the PDVB-VI-TiO2-x and PDVB-Py-TiO2-x were active in catalyzing the degradation of PNP and RhB organic pollutants under visible light irradiation. The enhanced activities of the PDVB-VI-TiO2-x and PDVB-Py-TiO2-x were ascribed to synergistic effects between abundant nanopores and the unique optical adsorption of visible light in the samples. ? 2015 IOP Publishing Ltd.