Poly(heptazine imide)nanocrystal for hydrogen peroxide evolution in the dark by accumulating photo-generated electrons  

作　　者：Song Kou Shu Lian Xiaodong Xie Wei Ren Yu Jin Jiahui Bao Honghui Ou Guidong Yang 

机构地区：[1]XJTU-Oxford International Joint Laboratory for Catalysis,School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China [2]Fujian-Taiwan-Hongkong-Macao Science and Technology Cooperation Base of Intelligent Pharmaceutics,Institute of Oceanography,College of Materials and Chemical Engineering,Minjiang University,Fuzhou 350108,China [3]School of Food and Bioengineering,Fujian Polytechnic Normal University,Fuqing 350300,China

出　　处：《Nano Research》2024年第9期8036-8044,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22302154,U22A20391,22078256,22202043 and 82202355);Innovation Capability Support Program of Shanxi(No.2023-CX-TD-26);the Programme of Introducing Talents of Discipline to Universities(No.B23025);the“Young Talent Support Plan”of Xi’an Jiaotong University(No.HG6J030);the high-level innovation and entrepreneurship talent project of Qinchuangyuan(No.QCYRCXM-2023-98);the Young and Middle-aged Scholars Project of Fujian Province(No.JAT210368).

摘　　要：Organic conjugated polymers have received extensive attention due to their unique electronic properties.However,there have been relatively few reports on the dark photocatalytic reactions utilizing organic conjugated polymers.Herein,we report the successful synthesis of an organic conjugated polymer based on poly(heptazine imide)nanocrystals(CNNCs)for H_(2)O_(2)evolution and biomedical applications using a simple salt molten method and sonication-centrifugation process.The results show that these colloid CNNCs have the characteristics of photogenerated electrons accumulation and realize dark photocatalysis with high reducibility under visible light irradiation.Notably,these accumulating photogenerated electrons can reduce O_(2)in darkness to produce H_(2)O_(2).In addition,cytotoxicity tests were conducted and it was found that H_(2)O_(2)produced under dark conditions could oxidize L-arginine(L-Arg)to NO,which effectively killed tumors in the dark.This work provides an important strategy to construct organic conjugated semiconductor nanocrystals and applying them to future energy and biomedical fields.

关 键 词：poly(heptazine imide) photocatalysis photogenerated electrons hydrogen peroxide evolution cancer treatment 

分 类 号：O63[理学—高分子化学]