Red phosphorus decorated and doped TiO2 nanofibers for efficient photocatalytic hydrogen evolution from pure water

Research output: Contribution to journalArticle

Authors

  • Yukun Zhu
  • Junzhi Li
  • Chung-li Dong
  • Jun Ren
  • Yu-cheng Huang
  • Daming Zhao
  • Daixing Wei
  • Xianfeng Yang
  • Chunxiao Lv
  • Yuyu Bu
  • Wei Han
  • Shaohua Shen
  • Dongjiang Yang

Colleges, School and Institutes

Abstract

In this study, we report a facile strategy to prepare a new class of red phosphorus (RP) decorated and doped TiO2 (A: anatase and B: TiO2(B)) nanofibers with boosted photocatalytic hydrogen evolution reaction (HER) performance from pure water. The optimized TiO2(B)/RP and TiO2(A)/RP heterostructure exhibits significantly enhanced photocatalytic performances, with HER rate reaching 11.4 and 5.3 μmol h−1, respectively. The optical absorption of TiO2 is significantly extended to the visible light region after decoration of RP. And more oxygen vacancies (VO) were introduced by phosphorus doping in the TiO2(B)/RP than TiO2(A)/RP. The theoretical calculations illustrate the formation of VO can decrease the ratio of effective masses of electron to hole, which gives rise to promoted photoinduced charge separation and transfer. These results suggest that the boosted photocatalytic HER performance should be mainly attributed to the synergetic enhancement in light harvesting and charge separation enabled by RP deposition and P5+ doping.

Details

Original languageEnglish
Article number117764
Number of pages10
JournalApplied Catalysis B: Environmental
Volume255
Early online date21 May 2019
Publication statusPublished - 15 Oct 2019

Keywords

  • Red phosphorus, Titanium oxide, Photocatalytic hydrogen evolution, Pure water splitting