基于交联聚合物的新型非均相光催化剂的制备与应用

doi:10.3724/SP.J.1095.2014.30343

摘要/Abstract

摘要： 以苯乙烯(S)和二乙烯基苯(DVB)为原料，采用端基为2-巯基-S-硫代苯甲酰乙酯的聚乳酸（PLA）作为链转移剂，同时加入具有光催化功能的含氟硼二吡咯（BODIPY）的苯乙烯(BDP-St)单体，通过可逆加成-断裂链转移（RAFT）聚合技术来制备交联聚合物，然后通过氢氧化钠甲醇/水溶液选择性刻蚀掉交联聚合物上的PLA链段，从而制备出高分子非均相光催化剂，并对其光催化氧化甲基苯基硫醚的性能进行研究。结果表明，所得到的聚合物材料没有明显的孔结构，但是光催化实验发现，采用含有PLA 的链转移剂得到的聚合物的催化性能要优于小分子链转移剂，但PLA的含量对光催化性能的影响不大。

关键词: 交联聚合物, 可逆加成-断裂链转移聚合, 微相分离, 非均相光催化剂

Abstract: Styrene(S) and divinyl benzene(DVB) were used as starting materials, and poly(lactic acid)(PLA) with terminated S-(thiobenzoyl)thioglycolic ester was used as the chain transfer agent. A styrenic monomer containing boron-dipyrromethene fluorophore(BODIPY)(BDP-St) was also copolymerized to form the cross-linked polymers using reversible addition-fragmentation chain transfer(RAFT) polymerization. Heterogeneous polymeric photocatalysts were obtained by selectively etching the PLA segments in the cross-linked polymers using the methanol/water solution of NaOH. Photocatalytic oxidation of thioanisole was studied using the cross-linked polymers. The results show that the polymeric materials obtained have no pore structures. Photocatalytic experiments show that the catalytic properties of polymers obtained from the chain transfer agent containing a PLA segment are better than those from a small molecular chain transfer agent, but the content of PLA has little effect on the catalytic properties.

Key words: cross-linked polymer, reversible addition-fragmentation chain transfer polymerization, microphase separation, heterogeneous photocatalysts

中图分类号:

O632

孙婷婷, 李文亮, 谢志刚, 景遐斌. 基于交联聚合物的新型非均相光催化剂的制备与应用[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30343.

SUN Tingting1,2, LI Wenliang1, XIE Zhigang1*, JING Xiabin1. Preparation and Application of Heterogeneous Photocatalysts Based on New Cross-Linked Polymers[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30343.

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