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Allotropy of selenium nanoparticles: Colourful transition, synthesis, and biotechnological applications.
- Source :
-
Microbial biotechnology [Microb Biotechnol] 2023 May; Vol. 16 (5), pp. 877-892. Date of Electronic Publication: 2023 Jan 09. - Publication Year :
- 2023
-
Abstract
- Elemental selenium (Se <superscript>0</superscript> ) nanomaterials undergo allotropic transition from thermodynamically-unstable to more stable phases. This process is significantly different when Se <superscript>0</superscript> nanoparticles (NPs) are produced via physico-chemical and biological pathways. While the allotropic transition of physico-chemically synthesized Se <superscript>0</superscript> is fast (minutes to hours), the biogenic Se <superscript>0</superscript> takes months to complete. The biopolymer layer covering biogenic Se <superscript>0</superscript> NPs might be the main factor controlling this retardation, but this still remains an open question. Phylogenetically-diverse bacteria reduce selenium oxyanions to red amorphous Se <superscript>0</superscript> allotrope, which has low market value. Then, red Se <superscript>0</superscript> undergoes allotropic transition to trigonal (metallic grey) allotrope, the end product having important industrial applications (e.g. semiconductors, alloys). Is it not yet clear whether biogenic Se <superscript>0</superscript> presents any biological function, or it is mainly a detoxification and respiratory by-product. The better understanding of this transition would benefit the recovery of Se <superscript>0</superscript> NPs from secondary resources and its targeted utilization with respect to each allotropic stage. This review article presents and critically discusses the main physico-chemical methods and biosynthetic pathways of Se <superscript>0</superscript> (bio)mineralization. In addition, the article proposes a conceptual model for the resource recovery potential of trigonal selenium nanomaterials in the context of circular economy.<br /> (© 2023 The Authors. Microbial Biotechnology published by Applied Microbiology International and John Wiley & Sons Ltd.)
Details
- Language :
- English
- ISSN :
- 1751-7915
- Volume :
- 16
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Microbial biotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 36622050
- Full Text :
- https://doi.org/10.1111/1751-7915.14209