Efficient photocatalytic removal of four endocrine-disrupting compounds using N-doped BiOBr catalyst under UV-Vis radiation

Nitrogen-doped BiOBr nanosheets with preferentially exposed (102) facets enhanced visible-light photoreactivity

“…40,85 Note that the E VB value of the as-obtained 0.9N-BiOBr (1.11 eV) was lower than the oxidation potential of ˙OH/OH − (1.99 eV vs. NHE) and ˙OH/H 2 O (2.27 eV vs. NHE), indicating that the photogenerated h + of valence band (VB) cannot directly oxidize water molecules and generate hydroxyl radical (˙OH), but the h + generated by the VB can directly oxidize RhB adsorbed on the surface of the photocatalyst. 40,86–91 Furthermore, the E CB value of 0.9N-BiOBr (−1.62 eV) was more negative than the reduction potential of O 2 /O 2 ˙ − (−0.046 eV vs. NHE), which suggests that the photogenerated e − of the conduction band (CB) can reduce molecular O 2 absorbed on the surface of 0.9N-BiOBr to generate a superoxide radical (O 2 ˙ − ), and ˙OH may also be generated by several free radical reactions from O 2 ˙ − . 17,40 Based on the above analysis, pure BiOBr has a similar pathway with 0.9N-BiOBr to generate O 2 ˙ − and ˙OH for the degradation of RhB under visible-light irradiation due to the typical values of CB and VB.…”

“…40,86–91 Furthermore, the E CB value of 0.9N-BiOBr (−1.62 eV) was more negative than the reduction potential of O 2 /O 2 ˙ − (−0.046 eV vs. NHE), which suggests that the photogenerated e − of the conduction band (CB) can reduce molecular O 2 absorbed on the surface of 0.9N-BiOBr to generate a superoxide radical (O 2 ˙ − ), and ˙OH may also be generated by several free radical reactions from O 2 ˙ − . 17,40 Based on the above analysis, pure BiOBr has a similar pathway with 0.9N-BiOBr to generate O 2 ˙ − and ˙OH for the degradation of RhB under visible-light irradiation due to the typical values of CB and VB.…”

Development of an HPLC-DAD method for the simultaneous analysis of four xenoestrogens in water and its application for monitoring photocatalytic degradation

“…The loading mass of the catalysts employed was 1 g L −1 and their activation was carried out under solar simulated irradiation. For detailed information and discussion about the photocatalytic experiments, please refer to the related article [2] .…”

“…In this sense, heterogeneous photocatalysis is an option to remove xenoestrogens from aqueous medium, emphasizing the development and application of active semiconductors under visible light and solar light. In our related study, N-doped BiOBr semiconductor was employed to completely remove a mixture of E2, EE2, BPA, and 4TOP in spiked samples under simulated solar light; for detailed information and an overview about these work, please refer to the full-length article [2] . The aim of this work was to develop and validate a quick and easy HPLC-DAD method for the reliable determination of a mixture of E2, EE2, BPA, and 4TOP in water for its application in the monitoring during the photocatalytic degradation, which represents a contribution to the development of new accessible methodologies for the analytical assessment of xenoestrogens in remediation assays.…”

Photocatalytic degradation of tetracycline antibiotic over a flower-like S-doped BiOBr: Performance, mechanism insight and toxicity assessment

“…Bi modification and phosphorylation of BiOBr enhanced its charge separation ability and obtained excellent photocatalytic performance (Zhu et al, 2019). N-doped BiOBr catalysts, were prepared by microwave-assisted solvothermal synthesis, increasing their specific surface area and photocatalytic activity (López-Velázquez et al, 2021). Therefore, the tuning method of IEF based on non-metal doping is usually beneficial for enhancing interlayer polarization to oxidize organic pollutants.…”