A Novel, Simple and Green Way to Fabricate BiVO4 with Excellent Photocatalytic Activity and Its Methylene Blue Decomposition Mechanism

Abstract

BiVO 4 photocatalysts were synthesized via a facile surfactant-free method with heat treatment. The heat treatment temperatures influenced the crystal structures and morphologies. The photocatalytic performance is associated with its crystallinity, Brunauer-Emmett-Teller (BET) specific surface area, and band gap energy. The BiVO 4 photocatalyst prepared by heat treatment at 700˝C showed the highest photocatalytic activity, promoting 100% degradation of methylene blue (MB) in 60 min under visible-light irradiation. Recycling experiments results indicated that the BiVO 4 photocatalysts have excellent photo-stability, and a possible mechanism for the photocatalytic process was proposed by examining the effects of the active species involved in MB degradation. This work could provide new insights into the fabrication of highly efficient and stable BiVO 4 photocatalysts for dye degradation.

Hydrothermal synthesis of BiOBr and BiOBr/CNT composites, their photocatalytic activity and the importance of early Bi6O6(OH)3(NO3)3·1.5H2O formation

“…BiOBr is now widely used as photocatalysts in degrading pollutants including dyes such as (Methyl Orange, Rhodamine B, Methylene Blue, etc.) [12,44,45], phenols [46], some phenolic compounds [3], and for some pesticides [47]. These are among the best choices when it comes to visible light photocatalytic activity due to its high photocorrosion stability and high photoactivity [48], its good chemical stability and non-toxicity [49], and the low probability of charge carrier recombination [50].…”

Fabrication of Novel ZIF-8@BiVO4 Composite with Enhanced Photocatalytic Performance

“…In recent years, the discovery of visible light response photocatalysts has greatly increased the utilization efficiency of sunlight [2]. In addition to modifying the traditional photocatalytic material TiO 2 to achieve visible light response [3], numerous efforts have been directed toward the development of efficient visible light responsive photocatalytic materials such as BFO, BiVO 4 (BVO), and g-C 3 N 4 [4][5][6][7]. BiVO 4 is a typical narrow band gap semiconductor oxide with excellent visible light catalytic performance and high photoelectric conversion efficiency.…”

In-Situ Noble Fabrication of Bi2S3/BiVO4 Hybrid Nanostructure through a Photoelectrochemical Transformation Process for Solar Hydrogen Production

“…These results reflect the slight discrepancy in the photocatalytic performance of the samples. Therefore, these observations indicate that the crystallinity, surface morphology, and band gap energy should be considered as having a combined effect on the photocatalytic performance . To further investigate the photoelectrochemical transformation of BiVO 4 into Bi 2 S 3 /BiVO 4 hybrid nanostructure after PEC measurements, the cross-sectional transmission electron microscopy was employed with FIB lift-out manner.…”

“…Therefore, these observations indicate that the crystallinity, surface morphology, and band gap energy should be considered as having a combined effect on the photocatalytic performance. 61 To further investigate the photoelectrochemical transformation of BiVO 4 into Bi 2 S 3 /BiVO 4 hybrid nanostructure after PEC measurements, the cross-sectional transmission electron microscopy was employed with FIB lift-out manner. A representative BF TEM and ADF-STEM images of the crosssectional views of the ABV2 sample at the two different places to confirm the Bi 2 S 3 /BiVO 4 heterojunctions material indicate that the distinct small grains of BiVO 4 are seen in the interface between the FTO and Bi 2 S 3 layers (Figure 5a,b).…”