Rational design of graphene biohydrogel as a modular platform for highly efficient starch-to-bioelectricity

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2024-06-07 DOI:10.1002/aic.18507

Jia-Xin Du, Bo Liang, Xing-Ming Zhao, Chong Sha, Aihua Liu, Yang-Chun Yong

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引用次数: 0

Abstract

Chemical-to-bioelectricity by using different biocatalysts was considered as a next-generation green power source. However, bioelectricity production using macromolecular substrate usually encountered low Coulombic efficiency (CE) and power density due to inefficient electron releasing and sluggish electron collection. Here, a rationally engineered biocascade (including depolymerization module, fermentation module, and electro-respiration module) embedded in highly conductive 3D graphene hydrogel (electron collection module) was designed and fabricated as a modular platform to simultaneously improve the substrate degradation, enhance the electron releasing and reinforce the electron collection. As a result, this modular platform enabled a ~15-fold improvement on power density and reached the highest CE (46.3%) and power density (780 mW/m²) ever reported for bioelectricity production from starch (a model macromolecular substrate). This work demonstrated a promising approach for rationally harvesting bioelectricity with complicated substrates, which would open up a new avenue for practical applications.

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合理设计石墨烯生物水凝胶，将其作为高效淀粉生物电的模块化平台

利用不同的生物催化剂进行化学转化生物发电被认为是下一代绿色能源。然而，由于电子释放效率低和电子收集缓慢，利用大分子基质生产生物电通常会遇到库仑效率（CE）和功率密度低的问题。在此，我们设计并制造了一个嵌入高导电性三维石墨烯水凝胶（电子收集模块）的模块化平台，合理设计了生物级联（包括解聚模块、发酵模块和电呼吸模块），以同时改善基质降解、提高电子释放和加强电子收集。因此，该模块化平台使功率密度提高了约 15 倍，达到了迄今为止利用淀粉（一种示范性大分子基质）生产生物电的最高 CE 值（46.3%）和功率密度（780 mW/m2）。这项工作展示了一种利用复杂基质合理获取生物电的可行方法，为实际应用开辟了一条新途径。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.

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