Ag⁰/Au⁰ nanocluster loaded Bi₂O₄ photocatalyst for methyl orange dye photodegradation

Abstract

Illustration of charge transfer between Bi2O4 and nanoclusters, and photocatalytic MO degradation by M/Bi2O4 under visible light irradiation (M = Ag or Au).

Driving up the Electrocatalytic Performance for Carbon Dioxide Conversion through Interface Tuning in Graphene Oxide–Bismuth Oxide Nanocomposites

“…In the as-prepared Bi@BiO x NP and in the calcined Bi 2 O 3 NP, the BE of the two main peaks is located at 161.3 eV (orange components of Figure ) plus its spin–orbit coupling peak at 166.6 eV, in agreement with an oxidation number of the metal of 5+ . The additional presence of two small contributions with BE of 155.5 and 158.4 eV are associated with metallic Bi (Figure A, green line) , and Bi 3+ . − The overall Bi 4f picture is consistent with the small penetration range of XPS, which makes difficult to detect the internal Bi core, while the oxidized shell is readily observed. The fact that the outer shell of the B oxide is overoxidized suggests a tendency of the NPs to react with atmosphere.…”

“… 40 The additional presence of two small contributions with BE of 155.5 and 158.4 eV are associated with metallic Bi ( Figure 5 A, green line) 41 , 42 and Bi 3+ . 43 − 45 The overall Bi 4f picture is consistent with the small penetration range of XPS, which makes difficult to detect the internal Bi core, while the oxidized shell is readily observed. The fact that the outer shell of the B oxide is overoxidized suggests a tendency of the NPs to react with atmosphere.…”

A Comprehensive Review on Non‐Trivalent Bismuth‐Based Materials: Structure, Synthesis, and Strategies for Improving Photocatalytic Performance

“…Liu's group prepared Ag‐ and Au‐nanocluster‐loaded Bi 2 O 4 semiconductor photocatalysts, which exhibited enhanced photocatalytic activity for azo‐dye‐pollutant MO degradation due to increased charge transfer between the metal NPs and Bi 2 O 4 . [ 59 ] Similarly, Fe (III)‐modified Bi 2 O 4 also presented higher photoreaction rate for RhB degradation than pure Bi 2 O 4 due to enhanced interfacial charge transfer and separation between amorphous Fe 2 O 3 and Bi 2 O 4 . [ 60 ] Kayani et al reported the synthesis of Ce‐doped Bi 2 O 4 films by using sol–gel dip‐coating technique followed by annealing at 450 °C, which showed good potential for UV blocking and antibacterial activity because of the redshift‐absorption edge.…”

Solar Light Driven Photocatalytic Activity of TiO2 Coupled Bi2 O4 Nanocomposites

“…Azo dyes are known to have acute carcinogenic effects to human and a negative impact on the environment. Hence it is becoming a global urgency to mitigate this issue (Hasan et al, 2021). The semiconductor-assisted photocatalysis process has proven to be effective for the decomposition of organic pollutants.…”