Construction of a Z-scheme Ag₂MoO₄/BiOBr heterojunction for photocatalytically removing organic pollutants

Abstract

How to facilitate photogenerated-carrier separation is an important subject to develop excellent semiconductor photocatalysts in environmental pollutant removal. Herein, Ag2MoO4 (AMO) nanoparticles were assembled onto the surface of BiOBr (BOB)...

Construction of Z-Scheme Ag2MoO4/ZnWO4 Heterojunctions for Photocatalytically Removing Pollutants

“…Reactive species quenching experiments were employed to reveal the reactive species in the photocataytic system (degradation of MB over 8%AMO/ZWO). , As illustrated in Figure S4, the photodegradation efficiency of MB is appreciably reduced by introducing ammonium oxalate (AO) or isopropanol (IPA) into the reaction system, verifying a dominant role of h + and ·OH in the dye decomposition. In contrast, the introduction of benzoquinone (BQ) leads to only a slight inhibition of the MB degradation, suggesting a relatively small role of ·O 2 – for the MB degradation.…”

“…71,72 Reactive species quenching experiments were employed to reveal the reactive species in the photocataytic system (degradation of MB over 8%AMO/ZWO). 73,74 As illustrated in Figure S4, the photodegradation efficiency of MB is appreciably reduced by introducing ammonium oxalate (AO) or isopropanol (IPA) into the reaction system, verifying a dominant role of h + and •OH in the dye decomposition. In contrast, the introduction of benzoquinone 75,76 The CB potential of AMO (−0.33 V vs NHE) is very close to the O 2 /•O 2 − redox (−0.33 V vs NHE), 77 indicating that the formation of •O 2 − radicals is realized through the reaction between the electrons at higher excitation states of AMO and O 2 species.…”

Persulfate Activation of Photocatalysts Based on S-Scheme Bi3NbO7/BiOBr0.75I0.25 Nanosheet Heterojunctions for Degradation of Organic Pollutants

“…The binding energy of the Bi element in 0.05BNO-BOBI is lower than that of BiOBr 0.75 I 0.25 , and the binding energy of the Nb element in 0.05BNO-BOBI is higher than that of Bi 3 NbO 7 , indicating the strong interaction between BiOBr 0.75 I 0.25 and Bi 3 NbO 7 . Compared with BiOBr 0.75 I 0.25 , the binding energy of O in 0.05BNO-BOBI moves toward a lower binding energy due to the fracture of Bi–O and the generation of Nb–O, which is used to justify the generation of 0.05BNO-BOBI heterojunction. ,− …”

Non-noble-metal TiC-nanoparticle-promoted charge separation and photocatalytic degradation performance on Bi2O3 microrods: degradation pathway and mechanism investigation

“…The degradability of antibiotics is also an important index by which to estimate the photocatalytic activity of catalysts. 58 In this experiment, the photocatalytic antibiotic removal activity of Bi 2 O 3 and 7.5%TiC/Bi 2 O 3 were studied using TC as the target pollutant irradiated by simulated sunlight, as shown in Fig. 9(a).…”