(602ab) Investigation of Application for Star Block Copolymer As a Material for Photocatalytic Degradation of Chlorophenols

This study investigated the photocatalytic degradation of chlorophenols using two different types of porphyrin core star block copolymer (P-PSD and P-PD) under visible light irradiation. Both P-PSD and P-PD catalysts show similar tendency in degradation of chlorophenols. Pentachlorophenol was degraded faster than other compounds (Pentachlorophenol > 2,4,6-Trichlorophenol > 2,4-Dichlorophenol). The removal rate of chlorophenols by P-PSD was higher than P-PD, which could be attributed by the existence of hydrophobicity on P-PSD. The degradation intermediates and by-products of chlorophenols were also identified by HPLC and LC-MS analysis. The analysis results revealed that the degradation of highly-chlorinated phenols were rapid than the less-chlorinated phenols as confirmed by residual chlorinated compounds and released chloride ions. The toxicity of PCP was greatly reduced after P-PSD catalyzed photocatalytic treatment. The process of photocatalytic degradation using porphyrin core star block copolymer is found to have potentially advantageous on dissolved chlorophenol pollutants in water.

This study investigated the photocatalytic degradation of chlorophenols using two different types of porphyrin core star block copolymer (P-PSD and P-PD) under visible light irradiation. Both P-PSD and P-PD catalysts show similar tendency in degradation of chlorophenols. Pentachlorophenol was degraded faster than other compounds (Pentachlorophenol > 2,4,6-Trichlorophenol > 2,4-Dichlorophenol). The removal rate of chlorophenols by P-PSD was higher than P-PD, which could be attributed by the existence of hydrophobicity on P-PSD. The degradation intermediates and by-products of chlorophenols were also identified by HPLC and LC-MS analysis. The analysis results revealed that the degradation of highly-chlorinated phenols were rapid than the less-chlorinated phenols as confirmed by residual chlorinated compounds and released chloride ions. The toxicity of PCP was greatly reduced after P-PSD catalyzed photocatalytic treatment. The process of photocatalytic degradation using porphyrin core star block copolymer is found to have potentially advantageous on dissolved chlorophenol pollutants in water.