Enhanced photodegradation of rifampicin and co-trimoxazole by ZnO/ZnMn2O4/ZnS-PVA and its genotoxicity studies on Allium cepa

被引:18
作者
Harini, G. [1 ]
Syed, Asad [2 ]
Rahiman, M. Kalil [3 ]
Bahkali, Ali H. [2 ]
Elgorban, Abdallah M. [2 ]
Varma, Rajender S. [4 ]
Khan, S. Sudheer [5 ]
机构
[1] Bannari Amman Inst Technol, Dept Biotechnol, Nanobiotechnol Lab, Sathyamangalam, Tamil Nadu, India
[2] King Saud Univ, Coll Sci, Dept Bot & Microbiol, PO 2455, Riyadh 11451, Saudi Arabia
[3] Saveetha Inst Med & Tech Sci SIMATS, Saveetha Sch Engn, Inst Agr Engn, Chennai 602105, Tamil Nadu, India
[4] Palacky Univ Olomouc, Czech Adv Technol & Res Inst, Reg Ctr Adv Technol & Mat, Slechtitelu 27, Olomouc 78371, Czech Republic
[5] Saveetha Inst Med & Tech Sci SIMATS, Saveetha Dent Coll & Hosp, Dept Oral Med & Radiol, Chennai 600077, Tamil Nadu, India
关键词
Oxygen vacancies; Urbach energy; Photodegradation; Non-toxic; OXYGEN VACANCIES; ZNO; SULFAMETHOXAZOLE; NANOPARTICLES; DEGRADATION; COMPOSITE;
D O I
10.1016/j.chemosphere.2022.136238
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Oxygen vacancies and its associated defect states have a great influence on the electronic and structural aspects of semiconductor photocatalysts, yet there is paucity of investigations about the influence of the defect states on their photocatalytic properties. Herein, this study reports the hierarchical fabrication of oxygen vacancy enriched ZnO/ZnMn2O4/ZnS-PVA nanocomposite (NCs) for the enhanced photodegradation of rifampicin and cotrimoxazole. The formation of lattice expansion induced oxygen vacancies and its associated Urbach tail energy, and n-p-n heterojunction-based S-scheme charge transfer path synergistically contributed to the boosted photocatalytic performance of the as prepared NCs. The photocatalytic performance of the nanomaterial towards rifampicin and co-trimoxazole has been determined to be 80% and 90% under visible light irradiation, respectively. Furthermore, various operating parameters including the concentration of NCs and drug, pH and interference of various ions have been evaluated. The degraded product intermediates have been elucidated by GC-MS analysis. The toxicity of the as-prepared nanomaterials has been evaluated by treating the samples with root tips of Allium cepa, where the NCs was found to be non-toxic. The study provides a new-fangled insight on the preparation and fabrication of non-toxic and defect rich nanomaterials which may help stimulate this area of research.
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页数:11
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