2017年12月1日
Fabrication of Si nanopowder and application to hydrogen generation and photoluminescent material
Journal of Electrical Engineering
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- 巻
- 68
- 号
- 7
- 開始ページ
- 17
- 終了ページ
- 23
- 記述言語
- 英語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- DOI
- 10.1515/jee-2017-0050
- 出版者・発行元
- De Gruyter Open Ltd
Si nanopowder is fabricated using the simple beads milling method. Fabricated Si nanopowder reacts with water in he neutral pH region between 7 and 9 to generate hydrogen. The hydrogen generation rate greatly increases with pH, while pH does not change after the hydrogen generation reaction. In the case of the reactions of Si nanopowder with strong alkaline solutions (eg pH13.9), 1600 mL hydrogen is generated from 1 g Si nanopowder in a short time (eg 15 min). When Si nanopowder is etched with HF solutions and immersed in ethanol, green photoluminescence (PL) is observed, and it is attributed to band-to-band transition of Si nanopowder. The Si nanopowder without HF etching in hexane shows blue PL. The PL spectra possess peaked structure, and it is attributed to vibronic bands of 9,10-dimethylantracene (DMA) in hexane solutions. The PL intensity is increased by more than 3,000 times by adsorption of DMA on Si nanopowder.
- ID情報
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- DOI : 10.1515/jee-2017-0050
- ISSN : 1335-3632
- SCOPUS ID : 85040821924