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Pyridinic Nitrogen Doped Carbon Dots Supply Electrons to Improve Photosynthesis and Extracellular Electron Transfer of Chlorella pyrenoidosa

文献类型： 外文期刊

作者： Huang, Xiaoman 1 ; Lin, Junjie 1 ; Liang, Jiarong 1 ; Kou, Erfeng 1 ; Cai, Wenxiao 1 ; Zheng, Yinjian 2 ; Zhang, Haoran 1 ; Zhang, Xuejie 1 ; Liu, Yingliang 1 ; Li, Wei 1 ; Lei, Bingfu 1 ;

作者机构： 1.South China Agr Univ, Coll Mat & Energy, Minist Educ, Key Lab Biobased Mat & Energy, Guangzhou 510642, Peoples R China

2.Chinese Acad Agr Sci, Inst Urban Agr, Chengdu 610218, Peoples R China

3.Guangdong Lab Lingnan Modern Agr, Maoming Branch, Maoming 525100, Guangdong, Peoples R China

关键词： carbon dots; electron donors; photosynthesis; pyridinic nitrogen

期刊名称：SMALL （ 影响因子：13.3； 五年影响因子：13.2 ）

ISSN： 1613-6810

年卷期： 2023 年 19 卷 31 期

页码：

收录情况： SCI

摘要： Optimizing photosynthesis is imperative for providing energy and organics for all life on the earth. Here, carbon dots doped with pyridinic nitrogen (named lev-CDs) are synthesized by the one-pot hydrothermal method, and the structure-function relationship between functional groups on lev-CDs and photosynthesis of Chlorella pyrenoidosa (C. pyrenoidosa) is proposed. Pyridinic nitrogen plays a key role in the positive effect on photosynthesis caused by lev-CDs. In detail, lev-CDs act as electron donors to supply photo-induced electrons to P680(+) and QA(+), causing electron transfer from lev-CDs to the photosynthetic electron transport chain in the photosystems. In return, the recombination efficiency of electron-hole pairs on lev-CDs decreases. As a result, the electron transfer rate in the electron transport chain, the activity of photosystem II, and the Calvin cycle are enhanced. Moreover, the electron transfer rate between C. pyrenoidosa and external circumstances enhanced by lev-CDs is about 50%, and electrons exported from C. pyrenoidosa can be used to reduce iron(III). This study is of great significance for engineering nanomaterials to improve photosynthesis.

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