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A Periplasmic Photosensitized Biohybrid System for Solar Hydrogen Production

机译：用于太阳能氢气生产的周质感光性生物萌发系统

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摘要

Whole-cell inorganic-biohybrid systems, integrating inorganic photosensitizers with intact living cells, have shown great potential for solar hydrogen production. However, the typical whole cell biohybrid system often suffers from the sluggish kinetics of electron transfer in the transmembrane diffusion process, which severely restrict their photocatalytic activity. Here, a unique periplasmic photosensitized biohybrid system is constructed by translocating CuInS2/ZnS quantum dots (QDs) into the Shewanella oneidensis MR-1 (SW) cells that express periplasmic hydrogenases. The photoexcitation and electron transfer processes of QDs photosensitizers occur simultaneously in the periplasm of SW cells, which reduces the distance for electron transport and avoids the extra energy loss involved in the transmembrane process. As expected, the photocatalytic H-2 generation of the fabricated biohybrid system is 8.6 times higher than that of bare QDs under visible light irradiation. Moreover, the good viability and stability of this biohybrid system endow it with an excellent sustained hydrogen production within 45 h, representing the most stable biohybrid among the reported whole-cell biohybrid H-2 production systems. This work provides a novel insight into the construction of a robust whole-cell biohybrid system for solar hydrogen production.
机译：全细胞无机 - 生物喂养系统，与完整的活细胞整合无机光敏细胞，对太阳能氢气产生了很大的潜力。然而，典型的全细胞生物冬小化系统通常存在跨膜扩散过程中电子转移的缓慢动力学，这严重限制了它们的光催化活性。这里，通过将CuinS2 / ZnS量子点（QDS）转移到表达周质氢酶的沉坦二偶氮MR-1（SW）细胞中来构建独特的周质感光性生物冬小化系统。 QDS光敏剂的光筛和电子转移过程在SW细胞的周质中同时发生，从而减少了电子传输的距离，避免了跨膜过程中涉及的额外能量损失。如所预期的，在可见光照射下，所制备的生物冬小化系统的光催化H-2生成比裸QDS高8.6倍。此外，这种生物冬小系统的良好的活力和稳定性赋予它在45小时内具有优异的持续氢气产量，代表报告的全细胞生物冬小化H-2生产系统中最稳定的生物培养。这项工作提供了一种新颖的洞察力，建造了用于太阳能氢气生产的稳健全部细胞生物淹没系统。

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  • 来源
    《Advanced energy materials》 |2021年第19期|2100256.1-2100256.7|共7页
  • 作者

    Luo Bifu; Wang Yan-Zhai; Li Di; Shen Hongqiang; Xu Li-Xia; Fang Zhen; Xia Zhenglong; Ren Jianlin; Shi Weidong; Yong Yang-Chun;

  • 作者单位

    Jiangsu Univ Sch Chem & Chem Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Biofuels Inst Sch Environm & Safety Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Inst Energy Res Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Sch Chem & Chem Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Biofuels Inst Sch Environm & Safety Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Biofuels Inst Sch Environm & Safety Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Sch Chem & Chem Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Sch Chem & Chem Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Sch Chem & Chem Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Biofuels Inst Sch Environm & Safety Engn Zhenjiang 212013 Jiangsu Peoples R China;

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  • 正文语种 eng
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  • 关键词

    biohybrid systems; CuInS; (2); ZnS quantum dots; hydrogenase; Shewanella oneidensis; solar hydrogen production;

    机译：Biohybrid系统;CUINS;（2）;ZNS量子点;氢酶;雪松oneidensis;太阳能氢气生产;

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