Fast fabrication of Co3O4 and CuO/BiVO4 composite photocatalysts with high crystallinity and enhanced photocatalytic activity via ultrasound irradiation

Synthesis of buckhorn-like BiVO4 with a shell of CeO nanodots: Effect of heterojunction structure on the enhancement of photocatalytic activity

“…The peak with the largest intensity attributed to the pure BiVO 4 appeared at around 600 nm, which was also actually a character PL peak of the monoclinic BiVO 4 [8,19]. The luminescence corresponded to the recombination of the hole formed in the O 2p band and the electron in the V 3d band.…”

“…Accordingly, coupling BiVO 4 with another semiconductor with matching band potentials to design heterojunction structure is an active strategy of improving the charge-separation efficiency and obtaining a satisfied photocatalytic activity under visible-light. Several studies have focused on the BiVO 4 -based composite photocatalysts, such as Co 3 O 4 /BiVO 4 [8], CuO/BiVO 4 [8][9][10], WO 3 /BiVO 4 [11], FeO/BiVO 4 [12], V 2 O 5 /BiVO 4 [13,14], BiVO 4 /TiO 2 [15,16], and even V 2 O 5 /TiO 2 /BiVO 4 [17]. These composites have been demonstrated to be effective in enhancing the photocatalytic activity of BiVO 4 .…”

Synthesis and characterization of La2Ti2O7 employed for photocatalytic degradation of reactive red 22 dyestuff in aqueous solution

“…Perovskites contains a cubic structure with three different ions, as form of ABO 3 [8]. A series of perovskite structured photocatalysts, such as LaNiO 3 [7], Bi 4 Ti 3 O 12 [9,10], Bi 2 Zn 2/3−x Cu x Ta 4/3 O 7 [11], BiVO 4 [12] and La 2 Ti 2 O 7 [6], have been investigated over their photocatalytic properties and applications. The separation of electrons and holes in the perovskites is easier than that in other semiconductor materials because of their narrower depletion layers.…”

Photocatalytic properties of BiVO4 synthesized by microwave-assisted hydrothermal method under simulated sunlight irradiation

“…Figure 7 shows the comparison of PL spectra of monoclinic BiMH and monoclinic BiH500 at 431 nm as wavelength excitation. PL intensity of the BiMH sample is lower than that of BiH500, which implies that the recombination electron in the V 3d of CB and hole in the O 2p in VB was diminished under light irradiation, which corresponds to the 483-nm peak [47]. It indicates the best promoting efficiency of generate the electron-hole pair to the surface of the semiconductor and attack to the organic compounds.…”