The Enhanced Photocatalytic Properties for Water Oxidation over Bi/BiVO₄/V₂O₅ Composite

Abstract

Bi/BiVO 4 /V 2 O 5 has been successfully synthesized by a simple annealing of BiVO 4 in Ar/H 2 . The obtained Bi/BiVO 4 /V 2 O 5 was characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The photocatalytic activities are examined by an oxygen-evolution reaction. When BiO/BiVO 4 /V 2 O 5 in air and Bi 2 VO 5.5 / BiVO 4 /V 2 O 5 in vacuum were compared with the products annealing in other atmospheres, Bi/BiVO 4 /V 2 O 5 exhibited the best performance (2413 μmol•g −1 •h −1 ), which could be attributed to the synergistic combination of Bi, BiVO 4 , and V 2 O 5 . This study may open up a new avenue for the development of an efficient composite photocatalyst.

Semimetal Bismuth‐Enhanced Light Adsorption and Interface Charge Transfer in Bi@BiVO4

“…However, its high cost and rare resource severely limit the wide application. The cheap and abundant semimetal bismuth could be a good substitution for noble metals, hence bismuth‐based Schottky junctions have been reported . For example, Chen et al .…”

“…prepared Bi@BiVO 4 hollow particles, however, the particles were 1–3 μm large and severely agglomerated. Xu et al . prepared Bi@BiVO 4 @V 2 O 5 using hydrogen reduction at 450 °C, in which the operation is not safe and the yield is low.…”

“…The cheap and abundant semimetal bismuth could be a good substitution for noble metals, hence bismuth-based Schottky junctions have been reported. [23][24][25][26][27][28][29][30][31][32][33][34] For example, Chen et al [23] prepared Ag-decorated Bi 2 O 3 nanospheres, which shows a higher visible-light activity than Bi 2 O 3 .Jing et al [26] prepared Bi@BiVO 4 hollow particles, however, the particles were 1-3 μm large and severely agglomerated. Xu et al [30] prepared Bi@BiVO 4 @V 2 O 5 using hydrogen reduction at 450 °C, in which the operation is not safe and the yield is low.…”

“…[23][24][25][26][27][28][29][30][31][32][33][34] For example, Chen et al [23] prepared Ag-decorated Bi 2 O 3 nanospheres, which shows a higher visible-light activity than Bi 2 O 3 .Jing et al [26] prepared Bi@BiVO 4 hollow particles, however, the particles were 1-3 μm large and severely agglomerated. Xu et al [30] prepared Bi@BiVO 4 @V 2 O 5 using hydrogen reduction at 450 °C, in which the operation is not safe and the yield is low. Liang et al [31] also prepared Bi@BiVO 4 by a photoreduction method, in which the yield is also low.…”

Enhanced Photoelectrocatalytical Performance of Inorganic-Inorganic Hybrid Consisting BiVO4, V2O5, and Cobalt Hexacyanocobaltate as a Perspective Photoanode for Water Splitting

“…Obtained powder exhibited photocatalytic properties towards water oxidation reaction in AgNO 3 solution. The films of resulting material were tested as photoanodes, but only for hole scavenger photoelectrooxidation [17]. Significant enhancement of water oxidation photocurrent has been achieved for inverse opal heterostructure (V 2 O 5 /BiVO 4 ) modified using NiOOH due to the specific morphology, presence of the heterojunction, and electrode/electrolyte interface modified by cocatalyst [18].…”