Enhanced photocurrent density for photoelectrochemical catalyzing water oxidation using novel W-doped BiVO4 and metal organic framework composites

Hao Pai, Tsung Rong Kuo, Ren Jei Chung, Subbiramaniyan Kubendhiran, Sibidou Yougbaré, Lu Yin Lin

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Doping heteroatoms and decorating co-catalyst are intensively applied to improve photocatalytic ability of BiVO4. In this study, it is the first time to design W-doped BiVO4 coupling MIL-101(Fe) as photocatalyst for water oxidation using electrodeposition and hydrothermal processes. Similar system with Mo as dopant has been reported, but the dopant plays important roles on electrochemical performance. It is worthy to study the efficient system with different dopant. Doping amount of W is optimized to achieve high carrier density without creating serious recombination sites. MIL-101(Fe) is decorated on W-doped BiVO4 to suppress surface recombination, create accessible active sites and improve water oxidation kinetics. Optimized W-doped BiVO4/MIL-101(Fe) electrode shows a high photocurrent density of 4.00 mA/cm2 at 1.23 V versus reversible hydrogen electrode (VRHE) under air mass 1.5-global simulated light illumination without hole scavenger in electrolyte, due to large electrochemical surface area, high carrier density and small charge-transfer resistance. The W-doped BiVO4 and BiVO4 electrodes merely show photocurrent densities of 2.96 and 1.72 mA/cm2 at 1.23 VRHE, respectively. Photocurrent retention higher than 95.5% is obtained for W-doped BiVO4/MIL-101 (Fe) electrode under continuous illumination for 6300 s, suggesting lasting photocatalytic ability of this novel W-doped BiVO4/MIL-101(Fe) electrode.

Original languageEnglish
Pages (from-to)515-526
Number of pages12
JournalJournal of Colloid and Interface Science
Volume624
DOIs
Publication statusPublished - Oct 15 2022

Keywords

  • BiVO
  • Doping
  • Electrodeposition
  • Hydrothermal
  • Mil-101 (Fe)
  • Water oxidation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Fingerprint

Dive into the research topics of 'Enhanced photocurrent density for photoelectrochemical catalyzing water oxidation using novel W-doped BiVO4 and metal organic framework composites'. Together they form a unique fingerprint.

Cite this