Semiconductor augmented hydrogen and polyhydroxybutyrate photosynthesis from Rhodospirillum rubrum and a mechanism study†

IF 9.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2023-01-01 DOI:10.1039/d3gc01173a

Lin Wang , Shulan Shi , Jun Liang , Bo Wang , Xiwen Xing , Cuiping Zeng

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引用次数: 1

Abstract

Photosynthetic biohybrid systems based on purple bacteria and semiconducting nanomaterials are promising platforms for sustainable solar-powered chemical production. However, these biohybrid systems have not been fully developed to date, and their energy utilization and electron transfer mechanisms are poorly understood. Herein, a Rhodospirillum rubrum–CdS biohybrid system was successfully constructed. The photosynthetic activity and photoelectrochemical properties of the biohybrid system were analyzed. Chromatographic and spectroscopic studies confirmed that the metabolic activities of R. rubrum cells were effectively augmented by surface-deposited CdS nanoparticles and validated with increased H₂ evolution, polyhydroxybutyrate (PHB) production and solid biomass accumulation. The energy consumption and metabolic profiles of the R. rubrum–CdS biohybrid system exhibited a growth phase-dependent behaviour. A photoelectrochemical study confirmed that light-excited electrons from CdS enhanced the photosynthetic electron flow of R. rubrum cells. Monochromatic light-modulated photoexcitation of the biohybrid system was utilized to explore interfacial electron transfer between CdS and R. rubrum cells, and the results showed that CdS enhanced the utilization of blue light by R. rubrum cells. This work investigated the feasibility and prospects of utilizing R. rubrum in semi-artificial photosynthesis of valuable products and offers insights into the energy utilization and the electron transfer mechanism between nanomaterials and purple bacteria.

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红红螺旋藻半导体增强氢和聚羟基丁酸光合作用及其机理研究

基于紫色细菌和半导体纳米材料的光合生物杂交系统是可持续太阳能化学生产的有前途的平台。然而，迄今为止，这些生物混合系统尚未完全开发，其能量利用和电子转移机制尚不清楚。在此基础上，成功构建了红红螺旋菌- cds生物杂交体系。对杂交体系的光合活性和光电化学性质进行了分析。色谱和光谱研究证实，表面沉积的CdS纳米颗粒有效增强了红草细胞的代谢活性，并增加了H2的生成、聚羟基丁酸盐(PHB)的产生和固体生物量的积累。红豆杉- cd生物杂交体系的能量消耗和代谢谱表现出生长阶段依赖性。一项光电化学研究证实，来自CdS的光激发电子增强了红草细胞的光合电子流。利用单色光调制光激发技术，研究了CdS与红草细胞之间的界面电子传递，结果表明CdS增强了红草细胞对蓝光的利用。本研究探讨了利用红草进行有价产物半人工光合作用的可行性和前景，并为纳米材料与紫色细菌之间的能量利用和电子传递机制提供了新的见解。

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来源期刊

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.