エネルギー効率に優れ、カスタマイズ可能な無機膜で、よりクリーンな未来を目指す(Energy-efficient and customisable inorganic membranes for a cleaner future)

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2023-03-30 シンガポール国立大学(NUS)

シンガポール国立大学の研究者チームは、エネルギー効率が高く、異なる用途に高度にカスタマイズ可能な超薄無機膜の開発に成功しました。従来の膜技術に比べ、自立型の膜の製造に革新的な手法を用いているため、産業プロセスの効率と持続可能性を促進する可能性があります。
この膜は、フィルタリングや分離に限定されるのではなく、エネルギー変換や触媒、センシングなど、幅広い応用分野において活用される可能性があります。この技術によって、エネルギー課題に取り組む新しい可能性が開かれることになります。

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気液界面における無機膜の機構論的定式化 Mechanistic formulation of inorganic membranes at the air–liquid interface

Chen Zhang,Wanheng Lu,Yingfeng Xu,Kaiyang Zeng & Ghim Wei Ho
Nature  Published:29 March 2023
DOI:https://doi.org/10.1038/s41586-023-05809-y

エネルギー効率に優れ、カスタマイズ可能な無機膜で、よりクリーンな未来を目指す(Energy-efficient and customisable inorganic membranes for a cleaner future)

Abstract

Freestanding functional inorganic membranes, beyond the limits of their organic and polymeric counterparts1, may unlock the potentials of advanced separation2, catalysis3, sensors4,5, memories6, optical filtering7 and ionic conductors8,9. However, the brittle nature of most inorganic materials, and the lack of surface unsaturated linkages10, mean that it is difficult to form continuous membranes through conventional top-down mouldings and/or bottom-up syntheses11. Up to now, only a few specific inorganic membranes have been fabricated from predeposited films by selective removal of sacrificial substrates4,5,6,8,9. Here we demonstrate a strategy to switch nucleation preferences in aqueous systems of inorganic precursors, resulting in the formation of various ultrathin inorganic membranes at the air–liquid interface. Mechanistic study shows that membrane growth depends on the kinematic evolution of floating building blocks, which helps to derive the phase diagram based on geometrical connectivity. This insight provides general synthetic guidance towards any unexplored membranes, as well as the principle of tuning membrane thickness and through-hole parameters. Beyond understanding  a complex dynamic system, this study comprehensively expands the traditional notion of membranes in terms of composition, structure and functionality.

0501セラミックス及び無機化学製品
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