La-BiO_(2-x)composite photocatalyst was successfully synthesized through a single-step hydrothermal strategy.The introduction of La3+into the BiO_(2-x)lattice replaces the Bi^(3+)in the BiO_(2-x)lattice,resulting in a...La-BiO_(2-x)composite photocatalyst was successfully synthesized through a single-step hydrothermal strategy.The introduction of La3+into the BiO_(2-x)lattice replaces the Bi^(3+)in the BiO_(2-x)lattice,resulting in a new defect level and oxygen vacancies(Vo)generation.The·O_(2)^(−)generated in the surface of Vo,which was converted into singlet oxygen(1O2)with the transformation of Bi^(5+)to Bi^(3+).Upon visible(near-infrared)light irradiation,the removal rates of tetracycline(TC),oxytetracycline(OTC),and levofloxacin(LEV)by trace 5%La-BiO_(2-x)(0.1 g/L)reached 84.18%(55.56%),78.85%and 70.12%,respectively.The Toxicity Estimation Software Tool(T.E.S.T)based on Quantitative Structure-Activity Relationship(QSAR)models illustrated that the biological toxicity of TC intermediates can be eliminated by 5%La-BiO_(2-x).The green bean germination rates in 5%La-BiO_(2-x)treated TC solution was close to that in the tap water(100.0%).The inorganic anion and humic acid(HA)exhibited almost no influence on the degradation of TC in lake water and river water.This study enhances the comprehension of biological toxicity elimination in antibiotics degradation process,providing the possibilities for actual applications of La-BiO_(2-x).展开更多
基金supported by Hunan Provincial Natural Science Foundation of China(Nos.2022JJ40505 and 2024JJ8069)the National Natural Science Foundation of China(No.21671026)The authors would like to extend their appreciation to Researchers Supporting Project number(RSP-2025-R20),King Saud University,Riyadh,Saudi Arabia.
文摘La-BiO_(2-x)composite photocatalyst was successfully synthesized through a single-step hydrothermal strategy.The introduction of La3+into the BiO_(2-x)lattice replaces the Bi^(3+)in the BiO_(2-x)lattice,resulting in a new defect level and oxygen vacancies(Vo)generation.The·O_(2)^(−)generated in the surface of Vo,which was converted into singlet oxygen(1O2)with the transformation of Bi^(5+)to Bi^(3+).Upon visible(near-infrared)light irradiation,the removal rates of tetracycline(TC),oxytetracycline(OTC),and levofloxacin(LEV)by trace 5%La-BiO_(2-x)(0.1 g/L)reached 84.18%(55.56%),78.85%and 70.12%,respectively.The Toxicity Estimation Software Tool(T.E.S.T)based on Quantitative Structure-Activity Relationship(QSAR)models illustrated that the biological toxicity of TC intermediates can be eliminated by 5%La-BiO_(2-x).The green bean germination rates in 5%La-BiO_(2-x)treated TC solution was close to that in the tap water(100.0%).The inorganic anion and humic acid(HA)exhibited almost no influence on the degradation of TC in lake water and river water.This study enhances the comprehension of biological toxicity elimination in antibiotics degradation process,providing the possibilities for actual applications of La-BiO_(2-x).
