화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.104, 582-591, December, 2021
DOI10.1016/j.jiec.2021.09.007  Export Citation
Ultrasonic assisted photocatalytic process for degradation of ciprofloxacin using TiO2-Pd nanocomposite immobilized on pumice stone
Parisa Yekan Motlagh1, Sema Akay2, Berkant Kayan2, and Alireza Khataee1, 3, †
  • 1Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran
  • 2Department of Chemistry, Art and Science Faculty, Aksaray University, 68100 Aksaray, Turkey
  • 3Department of Environmental Engineering, Gebze Technical University, 41400 Gebze, Turkey
E-mail:
Herein, Pumice (PM)-TiO2-Pd nanocomposite as an efficient catalyst was prepared by modified sol-gel method and used for sonophotocatalytic removal of ciprofloxacin (CIP). Various analyses were used to investigate the properties of the catalysts. Based on the SEM results, the TiO2 and Pd nanoparticles on the PM surface were immobilized regularly without aggregation. Also, the crystalline structure and functional groups of PM-TiO2-Pd nanocomposite were identified successfully by XRD and FTIR analyses. The bandgap energy of 2.52, 3.17, and 3.29 eV were calculated for PM-TiO2-Pd, PM-TiO2, and PM indicating higher sonophotocatalytic activity of PM-TiO2-Pd nanocomposite. 79.44 % of CIP was removed within 120 min of treatment time using in the optimum condition ([PM-TiO2-Pd] = 0.5 g/L, [CIP]0 = 20 mg/L and pH = 6). By adding radical scavengers like EDTA, CrO3, formic acid, and enhancers like K2S2O8 and H2O2 the degradation efficiency was as follows respectively: 37.72, 31.71, 28.29, 88.78, and 72.43%. The reusability and stability of the composite after four consecutive runs was decreased only 9.44%. Also, 8 intermediate byproducts generated under sonophotocatalytic degradation of CIP by PM-TiO2-Pd nanocomposite were identified.
Keywords:Advanced oxidation process;Ultrasonic assisted photocatalysis;Pumice-TiO2-Pd;Nanocomposite;Pharmaceutical
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