Photocatalytic H2 evolution of porous silicon derived from magnesiothermic reduction of mesoporous SiO2

Hewei Sun, Jingjing Chen, Shan Liu, Dinesh Kumar Agrawal, Yang Zhao, Dajian Wang, Zhiyong Mao

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

In this work, porous silicon (PSi) was synthesized by magnesiothermic reduction of mesoporous SiO2 (MCM-41) and its photocatalytic hydrogen evolution performance was investigated. The unique mesoporous structure of PSi expands the band gap of silicon and shifts its conduction band to a more negative position. As a result, excellent photocatalytic water splitting efficiency of 604.7 μmol h−1 g−1 under visible-light radiation is recorded for the synthesized PSi photocatalysts without loading noble metal cocatalysts. This study presented a promising visible light response photocatalysts for the generation green renewable hydrogen energy basing on PSi material deriving from simple magnesiothermic reduction of mesoporous SiO2.

Original languageEnglish (US)
Pages (from-to)7216-7221
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number14
DOIs
StatePublished - Mar 15 2019

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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