Ag₃PO₄/TiO₂heterostructures with enhanced photocatalytic activity

Abstract

Heterostructured Ag3PO4/TiO2 composites have been fabricated via an in situ precipitation method by depositing Ag3PO4 nanoparticles onto the surface of TiO2 microspheres. The enhanced photocatalytic activity of the Ag3PO4/TiO2 heterostructures for the degradation of rhodamine B (RhB) under UV light irradiation could be attributed to the effective separation of photogenerated electron–hole pairs driven by the photoinduced potential difference generated at the Ag3PO4/TiO2 heterojunction interface. Furthermore, when 10 at% (molar percentage) of Ag3PO4 is loaded onto the TiO2 surface, the Ag3PO4/TiO2 composites exhibit the best photocatalytic activity and the rate constant of RhB degradation is over three times that of pure TiO2. In addition, the mechanism for the enhancement of the photocatalytic activity of Ag3PO4/TiO2 is also investigated by comparison of their PL spectra.

Preparation of flower-like BiOBr–WO 3 –Bi 2 WO 6 ternary hybrid with enhanced visible-light photocatalytic activity

“…In the BiOBr-WO 3 -Bi 2 WO 6 ternary hybrid system, the CB edge (0.28 eV vs NHE) of BiOBr lies below that of Bi 2 WO 6 (0.24 eV vs NHE) and above that of WO 3 (0.74 eV vs NHE). Therefore, the CB positions in the ternary hybrid can form a cascadal structure[39][40]. The WO 3 -Bi 2 WO 6 binary system shows enhanced photocatalytic activity than pure Bi 2 WO 6 , because the formation of heterojunction prolongs the lifetime of electrons and improves the efficient separation of photogenerated charges.…”

Efficient reduction of CO2 to CO by Ag3PO4/TiO2 photocatalyst under ultraviolet and visible light irradiation

“…The yield of CO for 0.15 AT was even higher than the sum of CO production over both Ag 3 PO 4 and TiO 2 . This result clearly demonstrates that the combination between Ag 3 PO 4 and TiO 2 played a synergetic role in the conversion of CO 2 to CO 30,31,44 . The AT samples can utilize UV and visible light more efficiently than the bare TiO 2 and Ag 3 PO 4 in photocatalytic CO 2 reduction.…”

“…06‐0505). The diffraction peaks of TiO 2 and the strongest diffraction peak (210) of Ag 3 PO 4 both appeared in the XRD patterns of the 0.1 and 0.15 AT, which indicate that the AT samples were synthesized successfully 30 …”

“…Thus, it is reasonable to believe that Ag 3 PO 4 can be used as a promising candidate coupling with TiO 2 to form the Ag 3 PO 4 /TiO 2 heterostructure. The Ag 3 PO 4 /TiO 2 heterostructure did exhibit extremely high photo‐oxidative capabilities in water oxidization as well as photodecomposition of organic contaminants with high visible light absorbance and strong stability 28–32 . The Ag 3 PO 4 /TiO 2 heterostructure exhibited lower combination rate of photogenerated charges and higher absorption of visible light, which would facilitate CO 2 reduction reactions.…”

Designing Visible‐Light‐Driven Z‐scheme Catalyst 2D g‐C3N4/Bi2MoO6: Enhanced Photodegradation Activity of Organic Pollutants

“…have been developed. [5][6][7][8][9] As a layered Aurivillius oxide, Bi 2 MoO 6 is consisted of [Bi 2 O 2 ] 2þ layers sandwiched between MoO 4 2À slabs. [10] For the bandgap of Bi 2 MoO 6 is around 2.5-2.8 eV, it can be used into water splitting and pollutants degradation under visible-light irradiation.…”