Fabrication and enhanced CO₂ reduction performance of N-self-doped TiO₂ microsheet photocatalyst by bi-cocatalyst modification

Maxwell Selase AKPLE, Jingxiang LOW, Shengwei LIU, Bei CHENG, Jiaguo YU, Wing Kei HO

Research output: Contribution to journalArticles

65 Citations (Scopus)

Abstract

Exploiting advanced photocatalyst to reduce carbon dioxide (CO₂) into solar fuels is important. In particular, the combined improvement in visible-light harvesting ability, charge separation and utilization efficiency is essential to enhance photocatalytic CO₂ reduction performance. Herein, N-self-doped anatase TiO₂ (NT) microsheets with proper coexposed {101} and {001} facets were first prepared via simple hydrothermal method using HF as capping agent and TiN as precursor. Then, the exposed {101} and {001} facets of the as-prepared NT microsheets were further modified by simultaneous photodeposition of Ag and MnOₓ nanoparticles (NPs), respectively. The resulting Ag and MnOₓ co-modified NT microsheets showed good visible-light absorption ability, excellent charge separation, and utilization efficiency and consequently exhibited the highest visible-light photocatalytic CO₂ reduction rate to methanol (0.53 μmol h⁻¹ g⁻¹). The enhanced photocatalytic activity is attributed to the synergistic modification of the visible-light harvesting ability of nitrogen doping, as well as charge separation and utilization efficiency by the combination of proper facet design and cocatalyst deposition together with Surface Plasmon Resonance (SPR) effect induced by Ag. TiO₂ modification techniques may shed some light on the future development of advanced visible-light-driven photocatalysts. Copyright © 2016 Elsevier Ltd.
Original languageEnglish
Pages (from-to)442-449
JournalJournal of CO2 Utilization
Volume16
Early online dateOct 2016
DOIs
Publication statusPublished - Dec 2016

Citation

Akple, M. S., Low, J., Liu, S., Cheng, B., Yu, J., & Ho, W. (2016). Fabrication and enhanced CO₂ reduction performance of N-self-doped TiO₂ microsheet photocatalyst by bi-cocatalyst modification. Journal of CO2 Utilization, 16, 442-449. doi: 10.1016/j.jcou.2016.10.009

Keywords

  • Anatase TiO₂ microsheet
  • N-doping
  • Bi-cocatalyst
  • CO₂ reduction
  • Solar fuels

Fingerprint Dive into the research topics of 'Fabrication and enhanced CO₂ reduction performance of N-self-doped TiO₂ microsheet photocatalyst by bi-cocatalyst modification'. Together they form a unique fingerprint.