Significant improvement and mechanism of tetracycline degradation with the synergistic piezoelectric effect of ZnO/CuS Z-scheme heterojunction photocatalysts

Abstract

In the current work, CuS nanoflowers modified ZnO nanorods heterojunction was synthesized by a two-step hydrothermal method. A synergetic piezo-photocatalytic system was constructed successfully based on the piezoelectric effect of...

Designing Atomic Interfaces in Chalcogenides for Boosting Photocatalysis

“…The interfacial polarization electric field contributed to the dramatically amended degradation of tetracycline (TC). [ 85 ] Interfaces between CuS with BaTiO 3 and even insulator BaSO 4 and CuSe with CaCO 3 also made a difference for the enlarged photocatalytic feedbacks, which is ascribed to the suitable band alignment and efficient interfacial electric field. [ 86 ]…”

“…The interfacial polarization electric field contributed to the dramatically amended degradation of tetracycline (TC). [85] Interfaces between CuS with BaTiO 3 and even insulator BaSO 4 and CuSe with Figure 12. a) The proposed charge-transfer route across two kinds of atomic interfaces in the Au@MoS 2 /CdS hybrid.…”

Photocatalysis Meets Piezoelectricity in a Type-I Oxygen Vacancy-Rich BaTiO3/BiOBr Heterojunction: Mechanism Insights from Characterizations to DFT Calculations

“…More importantly, variations in the electronic band structure of BiOBr induced by the polarization electric field (PEF) of BaTiO 3 were explored by density functional theory (DFT) calculations. Moreover, the PEF was stimulated mostly by ultrasonic irradiation instead of mechanical stress. , The usage of ultrasonic waves in piezoelectric catalysis or piezo-photocatalysis might give rise to the following issues: (1) ultrasonic irradiation was not feasible in practical applications; (2) the strong ultrasonic energy might destroy the composite structure of heterojunctions; and (3) ultrasonic cavitation was unknown for the catalysis enhancement mechanisms. Therefore, in this work, mechanical agitation was used to provide the mechanical stress to stimulate the PEF of BaTiO 3 .…”

Dispersing agglomerated Zn4In2S7 on g-C3N4 nanosheets to form a 2D/2D S-scheme heterojunction for highly selective photocatalytic cleavage of lignin models

“…Therefore, the S-scheme heterojunction can excellently separate and retain the strong photogenerated electrons and holes of the two photocatalysts, exhibiting strong redox capabilities. Additionally, graphitic carbon nitride (g-C 3 N 4 ) with a 2D structure can be compatible with the energy band gap of ZIS 24 and has a huge specific surface area and thinness. 25 Importantly, π-π stacking interactions between flexible g-C 3 N 4 surfaces and lignin model molecules may enhance the photocatalyst's lignin adsorption capacity.…”