Synthesis of Highly Efficient Ag@AgCl Plasmonic Photocatalysts with Various Structures

Abstract

By means of a simple ion-exchange process (using different precursors) and a light-induced chemical reduction reaction, highly efficient Ag@AgCl plasmonic photocatalysts with various self-assembled structures-including microrods, irregular balls, and hollow spheres-have been fabricated. All the obtained Ag@AgCl catalysts were characterized by means of X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and UV-visible diffuse reflectance spectroscopy. The effect of the different morphologies on the properties of the photocatalysts was studied. The average content of elemental Ag in Ag@AgCl was found to be about 3.2 mol %. All the catalysts show strong absorption in the visible-light region. The obtained Ag@AgCl samples exhibit enhanced photocatalytic activity for the degradation of organic contaminants under visible-light irradiation. The stability of the plasmonic photocatalysts was also investigated in detail.

Mechanism and experimental study on the photocatalytic performance of Ag/AgCl @ chiral TiO2 nanofibers photocatalyst: The impact of wastewater components

“…The absorption spectra of pristine Ag/AgCl @ chiral TiO 2 nanofibers at 200-350 nm can be attributed to the characteristic absorption of the AgCl semiconductor [29] and of TiO 2 , while the response in the visible-light region (400-800 nm) results from the creation of surface plasmon resonance [30] (Fig. 5a).…”

Morphology-controlled synthesis of sunlight-driven plasmonic photocatalysts Ag@AgX (X = Cl, Br) with graphene oxide template

“…Accordingly, an interesting morphology dependent and enhanced photocatalytic activity could be easily achieved in our system. Moreover, the photocatalytic stability of Ag@AgX@Graphene nanocomposites those in previous work 2,11,25 . After five times recycling experiments, only slight decrease was observed, indicating the good photocatalytic stability (data not shown).…”

“…Since the first report on the visible-light Ag@AgCl plasmonic photocatalysts by research group of Huang in 2008 2 , a large number of Ag@AgX (X=Cl, Br, I) plasmonic photocatalysts have attracted much attention. Up to now, various sizes and structures 35 of the new family have been fabricated, which include nanocubic 3,4 , near-spherical 5,6 , rounded triangular pyramid 7 , polyhedral 8 , heart-like 9 , nanocashew 10 , hollow-sphere micro/nanostructure 11 , etc. In those cases, plasmonic nanostructures have been synthesized via either hydrothermal, ion-exchange method or 40 direct precipitation process, where a subsequent light-, microwave-or heat-induced generation of Ag is required.…”

Visible-light-driven Ag/Ag3PO4-based plasmonic photocatalysts: Enhanced photocatalytic performance by hybridization with graphene oxide

“…373.5 and 367.5 eV, which can be attributed to Ag 3d 3/2 and Ag 3d 5/2 binding energies, respectively, could be observed. These two bands could be further deconvoluted into two sets of peaks at 373.5, 374.2 eV and 367.5, 368.3 eV, wherein those at 374.2 and 368.3 eV are ascribed to the metallic Ag 0 of Ag/Ag 3 PO 4 , and those at 373.5 and 367.5 eV are attributed to Ag + , respectively [28,45,46]. In the cases of the GO-involved nanostructures, Ag/Ag 3 PO 4 /GO, the Ag 3d 5/2 and Ag 3d 3/2 peaks shift to higher binding energies to 368 and 374 eV, respectively.…”