Complete magnesiothermic reduction reaction of vertically aligned mesoporous silica channels to form pure silicon nanoparticles

Scientific Reports
Kyoung Hwan KimHee-Tae Jung

Abstract

Owing to its simplicity and low temperature conditions, magnesiothermic reduction of silica is one of the most powerful methods for producing silicon nanostructures. However, incomplete reduction takes place in this process leaving unconverted silica under the silicon layer. This phenomenon limits the use of this method for the rational design of silicon structures. In this effort, a technique that enables complete magnesiothermic reduction of silica to form silicon has been developed. The procedure involves magnesium promoted reduction of vertically oriented mesoporous silica channels on reduced graphene oxides (rGO) sheets. The mesopores play a significant role in effectively enabling magnesium gas to interact with silica through a large number of reaction sites. Utilizing this approach, highly uniform, ca. 10 nm sized silicon nanoparticles are generated without contamination by unreacted silica. The new method for complete magnesiothermic reduction of mesoporous silica approach provides a foundation for the rational design of silicon structures.

References

Jun 21, 2002·Nature·Mark E Davis
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Mar 17, 2010·Nature Materials·A MagasinskiG Yushin
Jun 1, 2010·Angewandte Chemie·Shubin YangKlaus Müllen
May 16, 2012·Nano Letters·Huigang Zhang, Paul V Braun
Aug 7, 2012·Advanced Materials·Jung-Keun YooKisuk Kang

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Citations

Nov 12, 2016·Water Research·Ming Xie, Stephen R Gray
May 24, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Hao WanGuanzhou Qiu
Mar 4, 2020·Pharmaceutics·Eleanor C L Jones, Luis M Bimbo
May 13, 2017·Nanoscale Research Letters·Keiko KikuchiAkira Kawasaki

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