后台 - 高 传博
Xin's paper on photocatalytic surface-initiated polymerization has been published by ACS Appl. Mater. Interfaces. Congratulations! Xin is a visiting student from Beijing Jiaotong University. This project was finished under collaborations of different research teams.
Title: Photocatalytic surface-initiated polymerization on TiO2 toward well-defined nanostructures.
Authors: X. Wang, Q. Lu, X. Wang, J. Joo, M. Dahl, B. Liu*, C. Gao*, Y. Yin*
Link to the publisher: http://pubs.acs.org/doi/pdfplus/10.1021/acsami.5b09551
Abstract: We demonstrate the use of TiO2 nanospheres as the photoinitiator for photocatalytic surface-initiated polymerization for the synthesis of various inorganic/polymer nanocomposites with well-defined structures. The excitation of TiO2 by UV light irradiation produces electrons and holes which drive the free radical polymerization near its surface, producing core/shell composite nanospheres with eccentric or concentric structures that can be tuned by controlling the surface compatibility between the polymer and the TiO2. When highly porous TiO2 nanospheres were employed as the photoinitiator, polymerization could disintegrate the mesoporous framework and give rise to nanocomposites with multiple TiO2 nanoparticles eventually distributed in the polymer spheres. Thanks to the well-developed sol-gel chemistry of titania, this synthesis is well extendable to the coating of the polymers on many other substrates of interest such as silica and ZnS by simply pre-modifying their surface with a thin layer of titania. In addition, this strategy could be easily applied to coating of different types of polymers such as polystyrene (PS), poly(methyl methacrylate) (PMMA) and poly(N-isopropylacrylamide) (PNIPAM). We expect this photocatalytic surface-initiated polymerization process could provide a platform for the synthesis of various inorganic/polymer hybrid nanocomposites for many interesting applications.
本工作第一作者王欣是来自北京交通大学的访问学生，该课题是依托加州大学河滨分校、北京交通大学和西安交通大学等单位开展的,论文发表在材料领域权威期刊ACS Applied Materials & Interfaces（影响因子：7.145）上。