Promotion of ZnSn(OH)6 photoactivity by constructing heterojunction with Ag@Ag3PO4 nanoparticles: Visible light elimination of single or multiple dyes

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

“…As a functional material, ZHS shows excellent photo, electrical, gas sensing and flame-retardant properties, being cheap, safe, non-toxic, low cost and highly sensitive [3,4]. Compared with TiO 2 , BiVO 4 , Cu 2 O, CdS, TiO 2 and TaOH [5], ZHS has a large bandgap, with +2.9 V of valence band (VB) and −0.76 V of conduction band (CB), which explains its high redox potential [6,7]. Moreover, ZHS has a strong covalent Zn-Sn bond that allows charge transfer.…”

“…The chemical bonds show conjugative effects at the interface, which act as electronic transmission channels during the photocatalytic process. Likewise, Chen et al [6] reported a novel Ag@Ag 3 PO 4 -modified ZHS photocatalyst obtained by a facile in situ deposition and photoreduction reaction approach. The Ag nanoparticles work as carrier-transfer centers by promoting charge transmission or separation, creating a new charge-transfer route for the photocatalytic process.…”

“…Figure6 In situ FT-IR spectra of NO absorption (a, b) and photocatalytic reaction (c, d) processes on ZHS and SnO 2 @ZnS-ZHS200.…”

Enhanced photocatalytic performance of rhodamine B and enrofloxacin by Pt loaded Bi4V2O11: boosted separation of charge carriers, additional superoxide radical production, and the photocatalytic mechanism

“…The addition of BQ affected the photocatalytic activity, suggesting that the superoxide radical also take a big part in the photocatalytic procedure. The conduction band (CB) can be calculated according to the following equation: 59 where χ is the electronegativity of the semiconductors, E e is the energy of free electrons (4.5 eV), and E g is the semiconductor band gap. The CB potential of Bi 4 V 2 O 11 was calculated to be 0.10 eV; this value is not negative enough for producing ˙O 2 − .…”

Antioil Ag3PO4 Nanoparticle/Polydopamine/Al2O3 Sandwich Structure for Complex Wastewater Treatment: Dynamic Catalysis under Natural Light

“…The Ag 3 PO 4 /Al 2 O 3 heterojunction played an important role in the catalytic process. As the conduction band and valence band of Ag 3 PO 4 (2.87 eV, 0.45 eV) were lower than those of Al 2 O 3 (8.70 eV, 2.35 eV), , when the heterojunction was exposed to natural light, electron–hole pairs were generated, and electrons were transferred to Al 2 O 3 while holes were transferred to Ag 3 PO 4 , followed by a further oxidation reaction . In this way, the rapid and high-efficiency water remediation process was accomplished.…”