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8. Microwave-assisted Synthesis, Characterization, Photocatalytic Degradation of Antibiotics, and Fluorometric Selective Sensing Activity of g-C3N4 Supported CuO Composites.

Author

Venkatesh, D., Deepthi, G., Mangatayaru, K. Girija, and Noorjahan, M.

Subjects
PHOTODEGRADATION, COPPER oxide, TETRACYCLINE, ANTIBIOTIC synthesis, BAND gaps, HEAVY metals, INTRAMOLECULAR proton transfer reactions
Abstract

Herein, we have designed for the fabrication of a series of g-C3N4/CuO composite by using one-step microwave-assisted synthesis for the degradation of antibiotics and detection of nano-molar range of toxic heavy metal ions. The synthesized g-C3N4/CuO composites were analyzed and characterized to know the structure, phase, surface area, absorption region, bandgap, and size of the composites. From the observation of TEM and XRD measurements, g-C3N4/CuO composites have hexagonal shape with average diameter of the particles is 25 ± 5 nm. The observed band gap values from UV-vis DRS for g-C3N4 nanosheets and CuO NPs are 2.64 eV and 1.72 eV. The synthesized g-C3N4/CuO composite has prodigious specific surface area (32.47 m2/g), which is the evident for superior heterogeneous catalytic applications. Therefore, the synthesized g-C3N4/CuO composites were tested for the degradation of antibiotics such as tetracycline (TC) and ciprofloxacin (CIP) under UV light illumination, it shows 88.02% and 90.01% degradation was observed within 1 h due to the matching optical band gap and internal charge transfer of excitons with in the heterojunction surface among g-C3N4 and CuO in the composite than the individual components (g-C3N4 and CuO) due to the high surface area and tiny particles of CuO were randomly deposited on the surface of g-C3N4 nanosheets. The catalytic reduction reaction follows as pseudo-first order equation and reused for 5 consecutive cycles without remarkable loss of catalytic activity. Moreover, the synthesized CuO NPs and g-C3N4/CuO composites were used as a prominent fluorescence sensing probe for the selective detection of Pb2+ in nano-molar range of concentration with Ksv is 1.38 × 104 mol− 1dm3. It was observed as a linear relationship based on the change in intensity, the limit of detection was determined to be 0.184 nM. [ABSTRACT FROM AUTHOR]

Published
2023
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16. Contributors

Author

Abd-Elsalam, Kamel A., Afreen, Shagufta, Ahmad, Iffat Zareen, Akanbi-Gada, Mariam A., de Andrade, Cristiano José, de Andrade, Lidiane Maria, Ashfaq, Mohammad, Bajpai, P.K., Bakshi, Mansi, Bao, Vo-Van Quoc, Batista, Jorge G.S., Bhuvaneshwari, V., Britto Hurtado, R., Camacho, Drexel H., Campos-Montiel, Rafael G., Chaibi, Rachid, Chauhan, Divya, Chikte, R.C., Chuc, Nguyen Huu, Cortez-Valadez, M., Delgado-Beleño, Y., Dewangan, Khemchand, El-Hamaky, Ahmed M.A., Fernández-Luqueño, Fabián, Ferreira, Aryel H., Flores-Acosta, M., Freitas, Lucas F., Gacem, Mohamed Amine, García-Mayagoitia, Selvia, Golla, Narasimha, Hassan, Atef A., Hotza, Dachamir, Jampílek, Josef, Kalaivani, S., Kant, Tushar, Kausar, Sharba, Keshu, Kora, Aruna Jyothi, Král’ová, Katarína, Krishna, Suresh Babu Naidu, Kumar, Arun, Kumar, D. Karthik, Kumar, S. Idhaya, Le Van Luan, de Lima, Caroline S.A., Lobregas, Michaela Olisha S., Lugão, Ademar B., Maass, Danielle, Mangalaraja, R.V., Mangatayaru, K. Girija, Mansour, Mogda K., Martinez-Nuñez, C.E., Mondaca, Felipe, Mostafa, Manal, Mtz-Enriquez, Arturo I., Nogueira, Kamila M., Ogunkunle, Clement O., de Oliveira, Débora, Omar, Rishabh Anand, Oraby, Noha H., Otles, Semih, Oyedeji, Stephen, Paknikar, K.M., Pariona, Nicolaza, Pérez-Hernández, Hermes, Quang, Dao Anh, Rajiv, Periakaruppan, Rajkuberan, Chandrasekaran, Rajwade, J.M., Ramasamy, Nirmal Kumar, Rana, Samridhi, Rani, Manviri, Reddy, D. Madhusudan, Reddy, G. Bhagavanth, Sahyar, Buket Yalcin, Sayed-ElAhl, Rasha M.H., Shahane, Shraddha, Shanker, Uma, Shrivas, Kamlesh, Singh, N., Sultana, Alviya, Talreja, Neetu, Thipe, Velaphi C., Torres-Gómez, Patricio Andrés, Ulucan-Altuntas, Kubra, Vaidehi, D., Valério, Alexsandra, Varun, Mayank, Vuong, Le Dai, and Yadav, Sandhya

Published
2022
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