Synthesis of carbon quantum dots/TiO2 nanocomposite for photo-degradation of Rhodamine B and cefradine |
| |
| Affiliation: | 1. School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. Department of Polymer Science & Engineering, Huaqiao University, Xiamen 361021, China;3. Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore;1. Department of Chemistry, U-3060, University of Connecticut, Storrs, CT 06269-3060, United States;2. Institute of Materials Science, U-3136, University of Connecticut, Storrs, CT 06269, United States;3. Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, United States;1. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, PR China;2. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, PR China;1. LEPABE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;2. Departamento de Química-CICECO, Universidade de Aveiro, Campus de Santiago, Aveiro, Portugal |
| |
| Abstract: | Pure TiO2 and carbon quantum dots (CQDs)-doped TiO2 nanocomposite (CQDs/TiO2 nanocomposite) were prepared by a sol-gel approach for photocatalytic removal of Rhodamine B and cefradine. Analyses by Transmission electronmicroscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), UV–visible spectroscopy and X-ray powder diffraction (XRD) confirmed the successful formation of CQDs/TiO2 heterostructure. The as-prepared TiO2 and CQDs/TiO2 composite possessed small particles, spherical-like shape, and anatase crystal form. Meanwhile, Rhodamine B and cefradine were chosen to evaluate the photocatalytic activity of TiO2 and CQDs/TiO2 composite. Results revealed that with the facile decoration of CQDs, the absorption of photocatalyst was extended into visible light region and photocatalytic activity was improved in comparison with pure TiO2. Furthermore, the mechanism for the improvement of the photocatalytic performance of the composites was discussed on the basis of the results. CQDs play an important role in the photocatalytic process, due to their superior ability to extend the visible absorption and produce more electrons and electron–hole pairs for the degradation of pollutants. In all, the paper offers further insights into the development of CQDs/TiO2 nanocomposite as photocatalyst for the degradation of antibiotics. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
