| Research Title |
SOLAR-LIGHT-DRIVEN PHOTOCATALYST BASED ON ZnO/CdS NANOCOMPOSITE FOR PHOTODEGRADATION OF OFLOXACIN (OFX) ANTIBIOTIC |
| Date of Distribution |
26 June 2019 |
| Conference |
| Title of the Conference |
The 6th European Conference on Environmental Applications of Advanced Oxidation Processes (EAAOP-6) |
| Organiser |
the Department for Environmental Sciences and Engineering, National Institute of Chemistry, Ljubljana, Slovenia, and the Section for Catalysis of the Slovenian Chemical Society |
| Conference Place |
luxurious Grand Hotel Bernardin Convention Center, located in the St. Bernardin hotel and conference resort |
| Province/State |
Slovenia |
| Conference Date |
26 June 2019 |
| To |
30 June 2019 |
| Proceeding Paper |
| Volume |
2019 |
| Issue |
1 |
| Page |
57 |
| Editors/edition/publisher |
|
| Abstract |
A ZnO/CdS nanoparticle was successfully synthesized by two-step chemical methods with using sodium dodecyl sulphate (SDS) as a capping agent. X-ray diffraction patterns of the composite indicated that the ZnO nanoparticle have been successfully combined with the CdS nanoparticles. The average crystallite size of the sample was found to be 16.62 nm using using Debye–Scherrer equation. The as-prepared composite shows spherical morphology (SEM micrograph) with an average diameter of about 71.09 nm due to the assembly of many crystallites. The optical properties of the sample were also investigated. Two values band gap energy (Eg) of 2.41 eV and 3.24 eV were observed by extrapolation corresponding to that of CdS and ZnO, respectively. A surface area of 21.61 m2/g and an average pore diameter of 49.48 nm were determined by BET analysis. Elemental colour mapping of the composite shows homogeneity of the particles, which supports the uniform distribution of cadmium, zinc, oxygen and sulfur indicating the high purity of the as-synthesized ZnO/CdS nanocomposite. The as-prepared nanocomposite was used for photodegradation of OFX antibiotic under solar light irradiation. Interestingly, the catalyst showed a high efficiency of 90% toward degradation of OFX antibiotic. The chemical kinetics result indicated that the photocatalytic degradation of the pollutant followed pseudo-first order kinetics. In addition, the photocatalytic degradation mechanism was also proposed based on radical and holes trapping experiments. The generated hole (h+) was most likely the major active species involving in photodegradation of the drug. According to the analysis of active species, the possible photocatalytic mechanism was proposed in Fig. 1. The chemical structure of the ZnO/CdS photocatalyst remained stable after photodegradation. The photocatalyst retains its original efficiency after the third cycle of reuse indicating the advantages of stability and reusability. |
| Author |
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| Peer Review Status |
ไม่มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Poster |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
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| Citation |
0
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Publication
Journal Publication
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