光降解
头孢噻肟
光催化
催化作用
核化学
降级(电信)
化学
材料科学
有机化学
抗生素
电信
生物化学
计算机科学
作者
Aya M. Al-Gariaa,G.S. Elasala,Eman Abdel Rahman Ismail,Mostafa M.H. Khalil,Islam M. El-Sewify
标识
DOI:10.1016/j.inoche.2023.111434
摘要
Elimination of pharmaceutical waste is essential for aquatic system preservation. In this report, the ZnO and Mn-ZnO nanospheres (MZNs) were effectively synthesized via facile co-precipitation method with different Mn doping concentrations as catalyst for photodegradation of cefotaxime. The structure features of the synthesized MZNs were successfully investigated. The obtained data were confirmed the successful fabrication of nanosphere ZnO and MZNs. The designed MZNs with various Mn concentrations were utilized in photodegradation of cefotaxime under optimum conditions. The photodegradation parameters such as antibiotic initial concentrations, catalyst dosage, and medium pH were carried out under UV irradiation. The superior photocatalytic activity was revealed when the MZNs molar ratio is 0.75 mol.%. The results show that the degradation efficiency of cefotaxime was 99% within 2 h at operating condition (initial concentration 30 mg/L, catalyst amount 0.5 g/ L and pH 9). The photodegradation mechanism of antibacterial cefotaxime drug in water is based on superoxide radicals which are considered the main reactive species. The developed MZNs exhibit high stability for removal of cefotaxime that reached to 98% after four times recycling. The MZNs demonstrated a simple and effective model for photocatalytic degradation of pharmaceutical waste.
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