Dependence of metallic Ag on the photocatalytic activity and photoinduced stability of Ag/AgCl photocatalyst

Adsorption and visible light-driven photocatalytic degradation of Rhodamine B in aqueous solutions by Ag@AgBr/SBA-15

“…On the other hand, during the RhB degradation process, some intermediates produced may compete with organic molecules, which limited the adsorption and active sites on the surface of the 50Ag@AgBr/SBA-15 [53]. M a n u s c r i p t 16 It could be clearly seen that with increasing pH from 3-9, RhB photocatalytic degradation efficiency rose from 74 to 83% but decreased to 66% at pH 11. Furthermore, the corresponding rate constant of the second-order kinetics also increased at first and then dropped, with its peak at 11.5E -4 min -1 , as shown in Fig.8 (b).…”

“…Most of them disperse those Ag halides particles into ethanol or deionized water, then a part of Ag + in silver halides is reduced to metallic Ag particles by photo-reduction with UV light or solar simulator [11][12][13]. When certain amounts of Ag 0 are formed, separations of electron-hole can proceed more conveniently, which strengthens the absorption of visible light and the subsequent photocatalysis [14][15][16]. In addition, various methods have been applied to prepare this kind of photocatalysts, such as water soluble A c c e p t e d M a n u s c r i p t 5 sacrificial salt-template process [17], one-pot solvothermal way [18], micro-wave assisted approach [19] and redox reactions [20].…”

Ag-based semiconductor photocatalysts in environmental purification

“…For example, the photocatalytic activity of Ag/AgCl [48], Ag/AgBr [49] and Ag/Ag(Br, I) [50] plasma systems were studied in detail. It was found that one of the obvious roles of Ag NPs is to enhance the absorption in the visible light region through surface plasmon resonance effect.…”

Photocatalytic self-cleaning cotton fabrics with platinum (IV) chloride modified TiO2 and N-TiO2 coatings

“…Besides the assistance charge separation, the incorporation of metals into lattices or onto surface of TiO 2 could also induce visible light activities, which is generally based on four mechanisms. The first one, metal nanoparticles, such as Au, Ag or Cu, possess strong plasmonic resonance absorption in the range of visible light, which would induce electron transfer from noble metals to the conduction band of TiO 2 and initiate photocatalytic reactions [23][24][25]. Secondly, metal ions entering into TiO 2 crystal lattices would narrow the band gaps and enable its visible light activity.…”