Sonochemical synthesis of graphitic carbon nitride-manganese oxide interfaces for enhanced photocatalytic degradation of
- PDF / 2,832,963 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 52 Downloads / 198 Views
RESEARCH ARTICLE
Sonochemical synthesis of graphitic carbon nitride-manganese oxide interfaces for enhanced photocatalytic degradation of tetracycline hydrochloride Shivamurthy Ravindra Yashas 1 & Harikaranahalli Puttaiah Shivaraju 1,2 & Gyaltsen Pema 1,2 & Ningappa Kumara Swamy 3 & Keerthiraj Namratha 4 & Bannimath Gurupadayya 5 & Puttaswamy Madhusudan 6 Received: 20 March 2020 / Accepted: 10 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract 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 photoelectro-intrinsic properties of the materials. The synergy of GCN and MnO2 results in rapid electron transfer, efficient visiblelight absorption, and slower electron-hole pair recombination through its photo-responsive traits against TcH. It was noted that ~ 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 (R2 = 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. Keywords Graphitic carbon nitride . Manganese oxide . Photocatalysis . Tetracycline hydrochloride . Sonochemical
Introduction The techno-economic development today has influenced the lifestyle of humans, but imparted serious environmental imbalances (Wang et al. 2019c). One such major challenge is the water contamination majorly with complex micropollutants like synthetic dyes, pharmaceutical compounds, personal care
products, endocrine disrupting compounds, phthalates, and volatile organic compounds (Zhou et al. 2019). Among these, antibiotics or the pharmaceutical compounds reaching the water bodies is of grave apprehension. Antibiotics are among the toptiered medications with 1–2 lakh tons of annual usage worldwide (Lu et al. 2019). However, tetracycline hydrochloride (TcH) is the ubiquitously administered broad-spectrum
Responsible editor: Sami Rtimi * Harikaranahalli Puttaiah Shivaraju [email protected] 1
2
Department of Environmental Sciences, Faculty of Natural Sciences, JSS Academy of Higher Education and Research, Sri Shivarathreshwaranagar, Mysuru, Karnataka 570015, India Center for Water, Food and Energy, GREENS Trust, Harikaranahalli, Dombaranahalli Post, Turuvekere Taluka, Tumkur District, Karnataka 572215, India
3
Department of Chemistry, Sri Jayachamarajendra
Data Loading...
