Photocatalytic Degradation of Oxytetracycline by Photosensitive Materials and Toxicological Analysis by Caenorhabditis elegans
2019
: This study explored a facile one-step hydrothermal method of preparing a high-performance photocatalyst, namely, graphene-TiO₂, for oxytetracycline (OTC) removal. The nanocomposites were characterized by Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy and X-ray diffraction (XRD). The photocatalytic properties of different graphene loading types and various OTC initial concentrations, temperatures, and initial pH values were investigated. Results showed that the material with 10% graphene content exhibited the best performance and removal efficiency (beyond 99%) of OTC within 180 min at 35 °C and pH 5.5. The effects of different reactive oxygen species scavengers on photodegradation and the contributions were evaluated, and a possible reaction mechanism was proposed. Caenorhabditis elegans was used for toxicity testing during the entire degradation process and achieved a favorable result.
Keywords:
- Environmental chemistry
- Caenorhabditis elegans
- Oxytetracycline
- Photocatalysis
- Degradation (geology)
- Materials science
- Organic chemistry
- Nuclear chemistry
- Diffuse reflectance infrared fourier transform
- Inorganic chemistry
- Spectroscopy
- Graphene
- Nanocomposite
- Photodegradation
- Transmission electron microscopy
- Reaction mechanism
- Correction
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