基于二苯并噻吩砜多孔聚合物光解水制氢研究  

Photocatalytic Performance of Organic Porous Polymers Based on Dibenzothiophene Sulfone Unit

作　　者：王首明 黄晓锋 罗锦新 金耀城 霍延平[1] WANG Shou-ming;HUANG Xiao-feng;LUO Jin-xin;JIN Yao-cheng;HUO Yan-ping(School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学轻工化工学院,广东广州510006

出　　处：《化学试剂》2022年第8期1184-1190,共7页Chemical Reagents

基　　金：国家自然科学基金青年项目(51903056);广东省自然科学基金博士启动项目(2018A030310577);广东工业大学启动基金项目(220413218)。

摘　　要：制备了两种基于二苯并噻吩砜单元的新型有机共轭多孔聚合物PBDFSO和PBDTSO,并将其应用于光解水制氢领域,通过主链含氧/硫杂原子修饰取代,系统研究了主链结构对材料光学吸收、化学能级以及光催化性能的影响。研究发现,两种共轭多孔聚合物都具有较宽的光学吸收范围,合适的光学带隙,并具有光解水制氢的能力。其中,含硫原子多孔聚合物PBDTSO在使用抗坏血酸作为牺牲剂时,模拟太阳光照射下展现出1973μmol/(g·h)的析氢速率,高于含氧原子的多孔聚合物PBDFSO的析氢速率,并具有较好的光稳定性。这表明通过杂原子取代可以优化多孔聚合物结构,从而有效提高聚合物催化剂的光催化活性。In recent years,significant progresses have achieved in the design and preparation of conjugated organic polymer photocatalysts.However,developing organic polymer photocatalysts with high conversion efficiency is still challenging.The rational structural design of organic polymer photocatalysts is the key to achieving high photocatalytic performance.Here,two novel organic conjugated porous polymers PBDFSO and PBDTSO based on a dibenzothiophene sulfone unit were prepared and applied to photocatalytic hydrogen production from water.The chemical structures and their influence on the absorption spectrum,energy level,and photocatalytic performance of the materials was systematically studied.The two prepared porous polymers had a wide optical absorption range and suitable optical band gap,and both two polymers could produce hydrogen by photocatalytic water.The sulfur atom-containing porous polymer PBDTSO exhibited a hydrogen evolution rate of 1973μmol/(g·h)when ascorbic acid was used as a sacrificial agent under simulated sunlight irradiation,which was higher than that of the oxygen atom-containing porous polymer PBDFSO and had good photostability.It indicates that the porous polymer structure can be optimized by heteroatom substitution,which can effectively improve photocatalytic activity.

关 键 词：共轭多孔聚合物 二苯并噻吩砜 苯并双噻吩 苯并双呋喃 光催化水制氢 

分 类 号：O631.11[理学—高分子化学]