Sunlight-Assisted Degradation of Dye Pollutants in Ag₃PO₄ Suspension

Abstract

Sunlight-induced photodegradation of rhodamine B over Ag3PO4 has been observed. Nanosized Ag3PO4 was synthesized by a facile ion-exchange route. X-ray powder diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, the Brunauer–Emmett–Teller surface area, UV–vis diffuse reflectance spectroscopy and photoluminescence spectra were employed to investigate the phase structure, morphology and optical property of the Ag3PO4 product. Nearly 100% of rhodamine B was degraded after a very short irradiation time using simulated sunlight in Ag3PO4 suspension, and the total organic carbon measurement revealed that a high degree of mineralization was achieved in the present photocatalytic system. Ag3PO4 catalyst has an excellent photocatalytic performance due to the high separation efficiency of electron and hole pairs. In the neutral pH solution, Ag3PO4 catalyst exhibited the best photoactivity under simulated sunlight. The photoinduced holes were considered to be the dominant active species in the photodegradation process.

Enormous enhancement in photocatalytic performance of Ag3PO4/HAp composite: A Z-scheme mechanism insight

“…The results (Fig. 7c) certified that h + is the main oxidative species in pristine Ag 3 PO 4 material, which is consistent with the previous literature [44]. Based on the above analysis, it can be concluded that the photooxidation process occurring on the surface of Ag 3 PO 4 /HAp-773 sample may involve the direct reaction of the pollutants with strong oxidizing superoxide radicals and holes.…”

Fabrication of Hierarchically Porous Reduced Graphene Oxide/SnIn4S8 Composites by a Low-Temperature Co-Precipitation Strategy and Their Excellent Visible-Light Photocatalytic Mineralization Performance

“…Dye contamination has become a major factor that contributes to water quality deterioration, and poses a potential hazard to living organisms due to the toxic, carcinogenic and mutagenic properties of dyes and their by-products [6][7][8][9][10]. Hence, the removal of organic dye pollutants from the wastewater becomes very essential.…”

Ag3PO4/CoFe2O4 magnetic nanocomposite: synthesis, characterization and applications in catalytic reduction of nitrophenols and sunlight-assisted photocatalytic degradation of organic dye pollutants

“…The calculated E CB and E VB edge positions for Ag 3 PO 4 are 0.49 and 2.85 eV, and for CoFe 2 O 4 are 0.14 and 1.9 eV, respectively, which are close to previous reported values. 58,59 On the basis of the above results and the detection of active species in the photodegradation process, a possible photocatalytic mechanism for dye photodegradation using Ag 3 PO 4 / CoFe 2 O 4 nanocomposite has been proposed as follows and illustrated in Fig. 12.…”