标题：Self-assembly of bioinspired catecholic cyclodextrin TiO2 heterosupramolecule with high adsorption capacity and efficient visible-light photoactivity作者：Yang, Zixin; Zhang, Xu; Cui, Jie

来源出版物：APPLIED CATALYSIS B-ENVIRONMENTAL 卷：148 页：243-249 DOI：10.1016/j.apcatb.2013.11.002 出版年：APR 27 2014

摘要：In this work, an efficient and simple supramolecular approach to introduce cyclodextrin on TiO2 was demonstrated using the protocatechuic acid functionalized beta-cyclodextrin (PCA-beta-CD) that had a bioinspired catecholic structure. Two types of PCA-beta-CD/TiO2 heterosupramolecules were obtained through a facile dip coating of TiO2 nanoparticles (Hombikat UV-100 and Fe3O4@SiO2@TiO2) in PCA-beta-CD aqueous solution. The high surface coverage of Hombikat UV-100 or Fe3O4@SiO2@TiO2 by the attached PCA-beta-CD was calculated to be 49.4% or 74.2% in the PCA-beta-CD/TiO2 based on the TGA results, and it was also confirmed by the optical properties study that PCA-beta-CD located onto the TiO2 surface mainly through the coordination of the catechol part on the cyclodextrin small ring side and TiO2. Compared with the adsorption amount onto bare UV-100 and Fe3O4 SiO2@TiO2, the adsorption of bisphenol A onto PCA-beta-CD/UV-100 and PCA-beta-CD/Fe3O4@SiO2 TiO2 was 6.9 and 7.9 times higher, respectively, because of the high inclusion affinity between PCA-beta-CD's cavity and bisphenol A. Moreover, the two PCA-beta D/TiO2 heterosupramolecules showed a high photoactivity to bisphenol A under light irradiation extending to the visible-light range. The cyclic use and X-ray photoelectron spectroscopy analysis results revealed that the PCA-beta-CD layer in PCA-beta-CD/TiO2 was stable and that the catalyst possessed reusable properties.

入藏号：WOS:000332431500026

文献类型：Article

语种：English

作者关键词：Catecholic beta-cyclodextrin, TiO2, Self-assembly, Adsorption, Visible-light photodegradation

扩展关键词：BETA-CYCLODEXTRIN; PHOTOCATALYTIC DEGRADATION; MAGNETIC NANOPARTICLES; INCLUSION COMPLEXES; SURFACE; DERIVATIVES; COMPOSITES; POLLUTANTS; TITANIA; WATER

通讯作者地址：Zhang, Xu; Wuhan Univ, Dept Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

电子邮件地址：zixinyangzxy@gmail.com; xuzhangwhu@gmail.com

地址：

[Zhang, Xu; Cui, Jie]Wuhan Univ, Dept Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

[Yang, Zixin] Univ Victoria, Dept Chem, Victoria, BC V8P 5C2, Canada.

研究方向：Chemistry; Engineering

ISSN：0926-3373