Nitrogen-doped carbon dots decorated on g-C3N4/Ag3PO4 photocatalyst with improved visible light photocatalytic activity and mechanism insight

Pt Nanowire-Anchored Dodecahedral Ag3PO4{110} Constructed for Significant Enhancement of Photocatalytic Activity and Anti-Photocorrosion Properties: Spatial Separation of Charge Carriers and PhotogeneratedElectron Utilization

“…Notably, the characteristic peaks of Ag 3d 3/2 (373.4 eV) and Ag 3d 5/2 (367.4 eV) ( Figure 2C and Figure S5) in Pt nanowire-anchored dodecahedral Ag 3 PO 4 showeda slight shift compared with pure dodecahedral Ag 3 PO 4 , which further confirmed the formation of Ag + -NH 3 bonds. In addition, the peaks at 132.5 eV ( Figure 2D), 530 eV, and 532 eV ( Figure 2E) were respectively ascribed to P 5+ and O 2in Pt nanowire-anchored dodecahedral Ag 3 PO 4 and to the adsorbed OH groups [38].…”

Preparation of the floating HGMs-Ag3PO4 composites and the visible-light photocatalytic properties

“…Compared with the same mass of pure Ag 3 PO 4 , the mass of Ag 3 PO 4 contained in HGMs3 is only 7.68% (≈8 wt% of the composite shown in table 1), but its photocatalytic efficiency (k=0.0444 min −1 ) is nearly twice that of pure Ag 3 PO 4 (k=0.0242 min −1 , see figure 7(b)). However, as shown in table 1, to enhance the photocatalytic activity of Ag 3 PO 4 -composite, the proportion of Ag 3 PO 4 often exceeds 50% [18,20,24,25,30]. Therefore, the superiority of the HGMs-Ag 3 PO 4 composite is obvious.…”

“…Yi [7] reported Ag 3 PO 4 had excellent performance on the evolution of O 2 from water splitting and remove of organic dyes under the visible-light exposure due to the capability to effectively separate photoexcited electrons and holes with suitable band gap of 2.45 eV, achieving a quantum yield of up to 90% (λ>420 nm), thus extending a new application of Ag 3 PO 4 in the field of photo-catalysis. The visible-light photo-catalytic degradation properties of Ag 3 PO 4 can be further enhanced by controlling its morphology [8], feature size [9], surface area [10] and low-index facets [11], by assembling with other semiconductors such as TiO 2 [6,12,13] , Fe 3 O 4 [14], AgX (X=Cl, Br, I) [15][16][17], In(OH) 3 [18], BiVO 4 [19], MOF [20], MoSe 2 [21], CeO 2 [22], N-Sr 2 Nb 2 O 7 [23], g-C 3 N 4 [24], polyaniline [25] and carbon based materials including graphene (GR) [26], graphene oxide (GO) [27], reduced graphene oxide (RGO) [28], carbon quantum dots (CQDs) [29]and carbon nanotubes (CNTs) [30] to construct a surface heterojunction, and the doping of atomic impurities [31]. The photo-catalytic activity performance of Ag 3 PO 4 -composites has been summarized into table 1.…”

“…The photo-catalytic activity performance of Ag 3 PO 4 -composites has been summarized into table 1. There are many typical organic pollutants to evaluate the photocatalytic activity of Ag 3 PO 4 -composites photocatalysts, such as using organic dyes (methylene blue-MB [8,13,24,30], rhodamine B-RhB [12,18,19], methyl orange-MO [22,29], etc), preservatives (methylparaben [16], phenol [20,25,28], etc), insecticides (imidacloprid [14], etc), antibiotic (tetracycline [26], etc). Compared with pure Ag 3 PO 4 photocatalyst, the Ag 3 PO 4 -composites have a certain degree of improvement in the photocatalytic activity on different organic pollutants.…”

“…Compared with pure Ag 3 PO 4 photocatalyst, the Ag 3 PO 4 -composites have a certain degree of improvement in the photocatalytic activity on different organic pollutants. Nevertheless, in order to achieve high photocatalytic performance, Ag 3 PO 4 needs to account for a large proportion even in the Ag 3 PO 4 composite photocatalyst [20,24,25,30]. The high cost of raw materials AgNO 3 and the difficulty of separating as well as recovering Ag 3 PO 4 -based photo-catalysts from the reaction suspension limit the large-scale practical application of the photo-catalysts [32].…”