Heymann Leonard, Bittinger Sophia C, Klinke Christian
Institute of Physical Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany.
Chemistry Department, Swansea University, Singleton Park, SA2 8PP Swansea, U.K.
ACS Omega. 2018 Dec 31;3(12):17042-17048. doi: 10.1021/acsomega.8b02659. Epub 2018 Dec 11.
Copolymerization of melamine with 2,4,6-triaminopyrimidine (TAP) in an electrochemically induced polymerization process leads to the formation of molecular doped poly(triazine imide) (PTI). The polymerization is based on the electrolysis of water and evolving radicals during this process. The incorporation of TAP is shown by techniques such as elemental analysis, Fourier transform infrared and NMR spectroscopies, and powder X-ray diffraction, and it is shown that the carbon content can be tuned by the variation of the molar ratio of the two precursors. This incorporation of TAP directly influences the electronic structure of PTI and as a result, a red shift can be observed in UV-vis spectroscopy. The smaller band gap and the increased absorption in the visible range lead to improved photocatalytic properties. In dye degradation experiments, it was possible to observe an increase of the rate of the degradation of methylene blue by a factor of 4 in comparison to undoped PTI or 7 if compared to melon.
在电化学诱导聚合过程中，三聚氰胺与2,4,6-三氨基嘧啶（TAP）共聚可形成分子掺杂的聚三嗪酰亚胺（PTI）。该聚合反应基于水的电解以及在此过程中产生的自由基。通过元素分析、傅里叶变换红外光谱和核磁共振光谱以及粉末X射线衍射等技术表明了TAP的掺入情况，并且表明可以通过改变两种前驱体的摩尔比来调节碳含量。TAP的这种掺入直接影响PTI的电子结构，结果在紫外-可见光谱中可观察到红移。较小的带隙和在可见光范围内增加的吸收导致光催化性能得到改善。在染料降解实验中，与未掺杂的PTI相比，观察到亚甲基蓝的降解速率提高了4倍，与蜜勒胺相比则提高了7倍。
