Fabrication of water-floating litchi-like polystyrene-sphere-supported TiO₂/Bi₂O₃ S-scheme heterojunction for efficient photocatalytic degradation of tetracycline

Abstract

The exploration of advanced photocatalysts for antibiotic degradation is critical, but it remains a challenge due to the lack of rational structural design and in-depth insights into molecular oxygen activation.

Generation of •OH and •O2– Radicals by a Bi2O3-Nanoparticle/Bi4O5Br2 Type-II Heterojunction for Photocatalytic Degradation of Organic Molecules

“…Bismuth oxide (Bi 2 O 3 ) is a typical lamellar semiconductor, with an E g of 2.58–2.85 eV and especially a deep VB potential, which is advantageous for photocatalytic reactions to produce holes (h + ) with a strong oxidation capacity . It has been used for CO 2 reduction, water splitting, contaminant degradation, lignin degradation, nitrogen fixation, and preparation of heterogeneous photocatalysts with other compounds to improve photoactivity, such as CdMoO 4 , TiO 2 , SrTiO 3 , Zn 3 In 2 S 6 , ZnO, MnO 2 , and Ta 2 O 5 , but has not been used to modify Bi 4 O 5 Br 2 . So it makes sense to synthesize a heterojunction photocatalyst composed of Bi 4 O 5 Br 2 with a high CB potential and Bi 2 O 3 with a low VB potential. , …”

Near-infrared responsive magnetic photocatalyst based on NaYF4:Yb3+/Er3+@Cu2O@MoS2@Fe3O4 for the efficient degradation of organic contaminants

“…Many pollutants have complex compositions, are toxic, and are difficult to degrade, and the conventional means of dealing with pollution fall short in their complete removal. 1,2 Consequently, environmental pollution has escalated into a worldwide crisis, posing significant risks to human health and the sustainability of natural ecosystems. Addressing these critical issues necessitates prioritizing the advancement of eco-friendly technologies focused on environmental clean-up and the transformation of energy.…”

Collaboration between Iridium Clusters and the {111} Dominant Facet of Cu2O for Triggering Efficient N2 Photofixation

“…45 In essence, the smaller the EIS semicircle, the greater the mobility and separation of photogenerated carriers. 46 From Figure S13a, the semicircular radius of Cu 2 O-111-Ir in the high-frequency area is smallest compared to other catalysts, meaning that Cu 2 O-111-Ir presents a lower interface resistance and higher charge transfer ability. To investigate the kinetic behaviors of carriers in greater depth, steady-state photoluminescence (PL) measurements were conducted (Figure S13b).…”

“…This significant reduction strongly proves that some photogenerated electrons of Cu 2 O-111-Ir with abundant N 2 reactive sites (e.g., Ir culsters) participate in the NRR reaction . In essence, the smaller the EIS semicircle, the greater the mobility and separation of photogenerated carriers . From Figure S13a, the semicircular radius of Cu 2 O-111-Ir in the high-frequency area is smallest compared to other catalysts, meaning that Cu 2 O-111-Ir presents a lower interface resistance and higher charge transfer ability.…”