Green synthesis of functional metallic nanoparticles by dissimilatory metal-reducing bacteria “Shewanella”: A comprehensive review

• Published in: Journal of materials science & technology 2023-09, Vol.158, p.63-76
• Main Authors: Yang, Jing, Ju, Peng, Dong, Xucheng, Duan, Jizhou, Xiao, Hui, Tang, Xuexi, Zhai, Xiaofan, Hou, Baorong
• Format: Article
• Language: English
• Subjects: Functional metallic nanoparticles; Green biosynthesis; Metal reduction; Shewanella strains
• ISSN: 1005-0302; 1941-1162
• DOI: 10.1016/j.jmst.2023.01.041

The biosynthesis strategy of nanoparticles has attracted much attention due to the mild synthesis conditions, environmental-friendly properties, and low costs. Biosynthesized nanoparticles (bio-NPs) not only show excellent physicochemical properties, but also exhibit high stability, enlarged specific surface area, and excellent biocompatibility, which are crucial for industrial, agricultural, and medical fields. Shewanella, a kind of dissimilatory metal-reducing bacteria, is regarded as a typical biosynthesis-functional bacteria class with wide distribution and strong adaptability. Thus, in this paper, functional bio-NPs by Shewanella were reviewed to provide a comprehensive view of current research progress. The biosynthetic mechanisms of Shewanella are summarized as the Mtr pathway (predominant), extracellular polymeric substance-induced pathway, and enzyme/protein-induced pathway. During the biosynthesis process, biological factors along with the physicochemical parameters highly influenced the properties of the resultant bio-NPs. Till now, bio-NPs have been applied in various fields including environmental remediation, antibacterial applications, and microbial fuel cells. However, some challenging issues of bio-NPs by Shewanella remain unsolved, such as optimizing suitable bacterial strains, intelligently controlling bio-NPs, clarifying biosynthesis mechanisms, and expanding bio-NPs applications. [Display omitted]