期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 28, 期 4, 页码 4778-4789出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-10813-0
关键词
Graphitic carbon nitride; Manganese oxide; Photocatalysis; Tetracycline hydrochloride; Sonochemical
资金
- JSS Academy of Higher Education and Research, Mysuru, India
The study focuses on sonochemical synthesis of GCN/MnO2 nanocomposite for photocatalytic degradation of tetracycline hydrochloride. The composite exhibited efficient photocatalytic properties against TcH and demonstrated good reusability for subsequent cycles, showing promising potential for environmental decontamination.
The present study focuses on the sonochemical synthesis of graphitic carbon nitride-manganese oxide (GCN/MnO2) nanocomposite for photocatalytic degradation of an environmentally hazardous pharmaceutical compound, tetracycline hydrochloride (TcH). The sonochemical synthesis aided in tailoring the morphology of GCN/MnO2. The characterization results of SEM/FESEM, XRD, FTIR, UV-Vis spectra, EIS, CV, etc., revealed on the morphology, composition, crystallinity, and other photo-electro-intrinsic properties of the materials. The synergy of GCN and MnO(2)results in rapid electron transfer, efficient visible-light absorption, and slower electron-hole pair recombination through its photo-responsive traits against TcH. It was noted that similar to 93% TcH (20 mg L-1) degradation was achieved for 30-mg catalyst dose under light-emitting diode (LED) irradiation (9 W, 220 V) in 135-min duration. The TcH mineralization results were well fit to pseudo-first-order kinetics with a rate constant of 0.02 min(-1)(R-2= 0.994). In addition, the composite possessed fair reusability for consequent cycles. Hence, the as-synthesized composite applied for photocatalysis and photoelectrocatalysis fosters a fit-for-purpose and reliable system in the decontamination of TcH in environmental samples.
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