TY - JOUR

T1 - N-doped titania nanoparticles containing Mo6 bromide and iodide clusters: Activity in photodegradation of rhodamine B and tetracycline

AU - Olawoyin, Christopher O.

AU - Vorotnikov, Yuri A.

AU - Asanov, Igor P.

AU - Shestopalov, Michael A.

AU - Vorotnikova, Natalya A.

N1 - This work was supported by the Ministry of Science and Higher Education of the Russian Federation, No. 121031700321-3. We are grateful to the Microscopic Centre of the Siberian Branch of the Russian Academy of Sciences for granting access to the microscopic equipment.

PY - 2024/10/16

Y1 - 2024/10/16

N2 - Contamination of water sources is a major environmental problem with far-reaching consequences for humanity. Organic substances are among the most widespread and persistent pollutants. Advanced oxidation processes, especially photocatalysis, have been considered as one of the most promising technologies for organic pollution control. In this study, hybrid photocatalysts based on N-doped TiO2, which exhibits activity in the visible region of the spectrum, and different content of octahedral Mo6 bromide and iodide cluster complexes were synthesized to achieve the highest efficiency of the formed S-scheme photocatalytic system under white light irradiation. According to the data obtained, the resulting materials are nanoparticles with a diameter of ∼10 nm exhibiting absorption up to ∼550 nm. Photocatalytic studies were performed using model organic molecules – the more colored rhodamine B (RhB) and the less colored antibiotic tetracycline (TET). The most active samples showed high efficiencies against both pollutants with keff ∼0.3–0.4 and 0.4–0.5 min−1, respectively, while the activity of iodide complexes was ∼1.3 times higher than that of bromide complexes. The stability of the catalysts is preserved for up to 5 cycles of TET photodegradation.

AB - Contamination of water sources is a major environmental problem with far-reaching consequences for humanity. Organic substances are among the most widespread and persistent pollutants. Advanced oxidation processes, especially photocatalysis, have been considered as one of the most promising technologies for organic pollution control. In this study, hybrid photocatalysts based on N-doped TiO2, which exhibits activity in the visible region of the spectrum, and different content of octahedral Mo6 bromide and iodide cluster complexes were synthesized to achieve the highest efficiency of the formed S-scheme photocatalytic system under white light irradiation. According to the data obtained, the resulting materials are nanoparticles with a diameter of ∼10 nm exhibiting absorption up to ∼550 nm. Photocatalytic studies were performed using model organic molecules – the more colored rhodamine B (RhB) and the less colored antibiotic tetracycline (TET). The most active samples showed high efficiencies against both pollutants with keff ∼0.3–0.4 and 0.4–0.5 min−1, respectively, while the activity of iodide complexes was ∼1.3 times higher than that of bromide complexes. The stability of the catalysts is preserved for up to 5 cycles of TET photodegradation.

KW - N-doped titania

KW - Nanoparticles

KW - Octahedral halide molybdenum clusters

KW - Rhodamine B

KW - Tetracycline

KW - Rhodamines/chemistry

KW - Titanium/chemistry

KW - Iodides/chemistry

KW - Photolysis

KW - Catalysis

KW - Tetracycline/chemistry

KW - Nanoparticles/chemistry

KW - Bromides/chemistry

KW - Water Pollutants, Chemical/chemistry

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85206337361&origin=inward&txGid=b521d925322c2df6999e14d1b2c17977

UR - https://www.mendeley.com/catalogue/ac30150d-8a85-33c3-9c0e-a63289e84a41/

U2 - 10.1016/j.chemosphere.2024.143531

DO - 10.1016/j.chemosphere.2024.143531

M3 - Article

C2 - 39401674

VL - 366

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

M1 - 143531

ER -