A controlled anion exchange strategy to synthesize Bi 2 S 3 nanoparticles/plate-like Bi 2 WO 6 heterostructures with enhanced visible light photocatalytic activities for Rhodamine B

Enhanced Photocatalytic Activity of BiVO4/Bi2S3/SnS2 Heterojunction under Visible Light

“…Although a small amount of Bi 2 S 3 would be favorable for the composite, excess content may lead to deterioration of the photocatalytic performance because Bi 2 S 3 has low photocatalytic activity of RhB degradation compared to SnS 2 and BiVO 4 , possibly due to its rapid recombination rate of the photogenerated electron-hole [17]. Thus, excessive Bi 2 S 3 could act as a recombination center for electron-hole pairs in the composite, which is similar to the findings of previous studies [13,19].…”

“…Although both materials have many advantages as a single photocatalyst, incorporating them with different photocatalysts to form a heterojunction has proved very effective to attain superior photocatalytic activity [1,[10][11][12]. The interface can act as a bridge allowing electrons to migrate between photocatalysts, which, in turn, suppress the photoinduced electron-hole recombination and improve the performance of photocatalysts [11,13]. In addition, the heterojunction may also induce a Z-scheme system in which the redox ability is enhanced via coupling two or more narrow-bandgap semiconductors [1,14].…”

Facile fabrication of Bi2S3/SnS2 heterojunction photocatalysts with efficient photocatalytic activity under visible light

“…The synergistic effect of SnS 2 and Bi 2 S 3 achieved an optimum (BS-3). When excess Bi 2 S 3 was coupled in the Bi 2 S 3 /SnS 2 heterostructures, the surface of SnS 2 was almost completely covered with Bi 2 S 3 and the active sites for the degradation of organic dyes via SnS 2 were reduced, meanwhile, excess Bi 2 S 3 can become a recombination center for photogenerated electrons and holes, leading to photoactivity fading [49]. That is why the photodegradation efficiency of MO in BS-10 suspension is only 61.21% under the same experimental conditions.…”

Comparative study of the photocatalytic performance for the degradation of different dyes by ZnIn2S4: adsorption, active species, and pathways

“…Li et al also found similar phenomena in the photocatalytic degradation of RhB by synthesized Bi 2 S 3 nanoparticles/platelike Bi 2 WO 6 heterostructures. 30 HPLC chromatograms of RhB degraded samples at 0 min and 60 min are shown in Fig. A.5.…”