Related Experiment Video
Updated: Jun 6, 2025
A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation
Published on: October 6, 2022
Porphyrinic based hydrogen-bonded organic framework/TiO2 nanocomposites for efficient photocatalytic degradation of
Chunying Li1, Yu Zhang1, Mengfei Tian1
1College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University; Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University; Engineering Research Center of Forest Bio-Preparation, Ministry of Education, Northeast Forestry University; Heilongjiang Provincial Key Laboratory of Ecological Utilization of Forestry-based Active Substances, Northeast Forestry University, Harbin 150040, China.
Abstract:
Porphyrinic hydrogen-bonded organic frameworks (porph-HOFs) have emerged as highly promising materials in the realm of photocatalysis due to their remarkable attributes, including low density, high surface area, efficient visible light absorption, and notable chemical stability. However, the rapid recombination of photogenerated charges remains a significant concern. In this work, a novel HOF-based photocatalyst, PFC-72/TiO2 was successfully designed with visible light response and high electron transfer capability. This involved bonding TiO2 nanoparticles to the PFC-72 framework synthesized using cobalt porphyrin as organic ligand and introducing bridging molecules 4-mercaptopyridine (4-PySH). Moreover, sulfadiazine (SDZ), a highly prevalent antibiotic, was effectively degraded from wastewater using PFC-72/TiO2. The high specific surface area of PFC-72 significantly improved the dispersion of TiO2 in PFC-72/TiO2, providing more active sites and improving the ability to adsorb SDZ. Characterizations and density functional theory analysis further confirmed that the photosensitization effect of porph-HOF extended the response range of TiO2 in PFC-72/TiO2 and reduced the recombination efficiency of photogenerated charges, consequently enhancing photocatalytic performance. Additionally, due to significantly improved robustness of PFC-72 and its axial coordination interaction with 4-PySH, PFC-72/TiO2 displayed excellent stability and recyclability. Consequently, optimized PFC-72/TiO2 exhibited a remarkable SDZ removal efficiency of 93.73% within 120 min, maintaining consistent photoactivity even after undergoing four cycles. Furthermore, intermediate products and degradation pathways were proposed based on UPLC-MS/MS.
