Hydrogen production from organic fatty acids using carbon-doped TiO2 nanoparticles under visible light irradiation

Yang Li, Liyuan Kuang, Dequan Xiao, Appala Raju Badireddy, Maocong Hu, Shiqiang Zhuang, Xianqin Wang, Eon Soo Lee, Taha Marhaba, Wen Zhang

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The photocatalytic production of H2 using carbon-doped TiO2 (C–TiO2) nanoparticles has been investigated in single or mixed systems of organic fatty acids (OFAs) under visible light irradiation, including acetic acid, propionate acid, butyric acid and lactic acid. When OFAs were applied at the same electron density (10 e-eq L−1), the H2 evolution rates followed the order of propionic acid > butyric acid ≈ acetic acid > lactic acid, whereas at the same molar concentration (0.5 mol L−1), that order changed to lactic acid > acetic acid > butyric acid ≈ propionic acid. This result implied that the electron transfer efficiency differed from four OFAs, probably due to their different affinity with C–TiO2. O2•− and CH3• partially contributed to OFAs degradation and H2 production. The quantum dynamics simulations of electron transfer revealed that the dominant mechanism of H2 production was direct electron transfer from adsorbed OFAs to C–TiO2. This work aims to pursue the synergy of solar energy utilization and conversion of OFAs into H2.

Original languageEnglish (US)
Pages (from-to)4335-4346
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number9
DOIs
StatePublished - Mar 1 2018

All Science Journal Classification (ASJC) codes

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

Keywords

  • Carbon-doped TiO
  • Hydrogen production
  • Organic fatty acid
  • Quantum dynamics simulations
  • Visible light photocatalysis
  • Water splitting

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