Visible-light-driven TiO2/Ag3PO4/GO heterostructure photocatalyst with dual-channel for photo-generated charges separation

Ag3PO4 quantum dots sensitized AgVO3 nanowires: A novel Ag3PO4/AgVO3 nanojunction with enhanced visible-light photocatalytic activity

“…At the same time, the CB of AgVO 3 is +0.31 eV vs. NHE [21], which is more negative than that of Ag 3 PO 4 (E CB = + 0.45 eV vs. NHE) [22] and the VB level of AgVO 3 is + 2.41 eV vs. NHE, which is also more negative than that of Ag 3 PO 4 (E VB = + 2.81 eV vs. NHE). The matching of conduction band and valence band levels between AgVO 3 and Ag 3 PO 4 makes Ag 3 PO 4 to be a suitable material for constructing heterojunction with AgVO 3 .…”

Reduced graphene oxide enwrapped pinecone-liked Ag3PO4/TiO2 composites with enhanced photocatalytic activity and stability under visible light

“…These experiment results indicate that GO has been reduced into rGO after UV-assisted photoreduction [37]. In addition to the D and G bands, four Raman peaks at around 153 cm À1 , 400 cm À1 , 528 cm À1 and 636 cm À1 associated with the E g , B 1g , A 1g and E g modes of anatase TiO 2 are observed in the Raman spectrum of TiO 2 / rGO [35]. In the spectrum of Ag 3 PO 4 , two Raman peaks at 410 and 575 cm À1 are ascribed to the symmetric stretch of PeOeP bonds, and the strong peak at 905 cm À1 is arising from the motion of terminal oxygen bond vibration in phosphate chains [30].…”

“…As for the XRD pattern of TiO 2 /rGO, all the diffraction peaks can be indexed to anatase TiO 2 . No obvious characteristic peaks related to rGO are observed in the XRD patterns of Ag 3 PO 4 /TiO 2 /rGO and TiO 2 /rGO, which may be attributed to relatively low diffraction intensity and the destruction of the regular stacking of graphene sheets by the incorporation of Ag 3 PO 4 and TiO 2 nanoparticles [25,35].…”

“…Among these heterostructures, Ag 3 PO 4 /TiO 2 and Ag 3 PO 4 /rGO composites have been studied intensively. It is reported that photogenerated holes in Ag 3 PO 4 can be transferred to TiO 2 due to the alignments of the electronic band structures of Ag 3 [33,34] and TiO 2 /Ag 3 PO 4 /GO [35], which indeed exhibit superior photocatalytic active and stability compared to binary-component composites. However, in the above triple-component composites, the relatively large Ag 3 PO 4 particles (200 nm to 2 mm) still remain high internal charges recombination compared to nano-sized Ag 3 PO 4 .…”

Cyclized polyacrynitrile modified Ag 3 PO 4 photocatalysts with enhanced photocatalytic activity under visible-light irradiation

“…Therefore, it is very important to develop effective methods to improve the stability of the Ag 3 PO 4 photocatalyst. Recently, many researches involving the combination of Ag 3 PO 4 with different materials, such as AgX (X = Cl, Br and I) [10][11][12], TiO 2 [13,14], ZnO [15,16] and GO [17][18][19], have been exploited to improve the stability and activity of Ag 3 PO 4 . More specifically, the use of polymeric materials as co-photocatalysts is attracting increasing attention in the fields of photochemistry and photocatalysis.…”