TY - JOUR
T1 - Empowering Adsorption and Photocatalytic Degradation of Ciprofloxacin on BiOI Composites
T2 - A Material-by-Design Investigation
AU - Khasevani, Sepideh G.
AU - Nikjoo, Dariush
AU - Chaxel, Cécile
AU - Umeki, Kentaro
AU - Sarmad, Shokat
AU - Mikkola, Jyri Pekka
AU - Concina, Isabella
N1 - Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.
PY - 2023/11/21
Y1 - 2023/11/21
N2 - Binary and ternary composites of BiOI with NH2-MIL-101(Fe) and a functionalized biochar were synthesized through an in situ approach, aimed at spurring the activity of the semiconductor as a photocatalyst for the removal of ciprofloxacin (CIP) from water. Experimental outcomes showed a drastic enhancement of the adsorption and the equilibrium (which increased from 39.31 mg g-1 of bare BiOI to 76.39 mg g-1 of the best ternary composite in 2 h time), while the kinetics of the process was not significantly changed. The photocatalytic performance was also significantly enhanced, and the complete removal of 10 ppm of CIP in 3 h reaction time was recorded under simulated solar light irradiation for the best catalyst of the investigated batch. Catalytic reactions supported by different materials obeyed different reaction orders, indicating the existence of different mechanisms. The use of scavengers for superoxide anion radicals, holes, and hydroxyl radicals showed that although all these species are involved in CIP photodegradation, the latter play the most crucial role, as also confirmed by carrying out the reaction at increasing pH conditions. A clear correlation between the reduction of BiOI crystallite sizes in the composites, as compared to the bare material, and the material performance as both adsorbers and photocatalyst was identified.
AB - Binary and ternary composites of BiOI with NH2-MIL-101(Fe) and a functionalized biochar were synthesized through an in situ approach, aimed at spurring the activity of the semiconductor as a photocatalyst for the removal of ciprofloxacin (CIP) from water. Experimental outcomes showed a drastic enhancement of the adsorption and the equilibrium (which increased from 39.31 mg g-1 of bare BiOI to 76.39 mg g-1 of the best ternary composite in 2 h time), while the kinetics of the process was not significantly changed. The photocatalytic performance was also significantly enhanced, and the complete removal of 10 ppm of CIP in 3 h reaction time was recorded under simulated solar light irradiation for the best catalyst of the investigated batch. Catalytic reactions supported by different materials obeyed different reaction orders, indicating the existence of different mechanisms. The use of scavengers for superoxide anion radicals, holes, and hydroxyl radicals showed that although all these species are involved in CIP photodegradation, the latter play the most crucial role, as also confirmed by carrying out the reaction at increasing pH conditions. A clear correlation between the reduction of BiOI crystallite sizes in the composites, as compared to the bare material, and the material performance as both adsorbers and photocatalyst was identified.
UR - http://www.scopus.com/inward/record.url?scp=85178352921&partnerID=8YFLogxK
U2 - 10.1021/acsomega.3c06243
DO - 10.1021/acsomega.3c06243
M3 - Article
AN - SCOPUS:85178352921
SN - 2470-1343
VL - 8
SP - 44044
EP - 44056
JO - ACS Omega
JF - ACS Omega
IS - 46
ER -