Journal
ACS OMEGA
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.2c02687
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Funding
- Postgraduate Program of Adama Science and Technology University, Research and Technology Transfer Office, Adama Science and Technology University [ASTU/AS-R/013/2021]
- Wachemo University
- National Research Foundation of Korea [NRF-2021H1D3A2A01099457]
- National Research Foundation of Korea [2021H1D3A2A01099457] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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CuO-ZnO nanocomposites synthesized using an extract from the Verbascum sinaiticum Benth. plant exhibited enhanced photocatalytic activity compared to ZnO nanoparticles. The synergy between ZnO and CuO contributed to the improved performance of CuO-ZnO NCs.
CuO-ZnO nanocomposites (NCs) were synthesized using an aqueous extract of Verbascum sinaiticum Benth. (GH) plant. X-ray diffraction (XRD), spectroscopic, and microscopic methods were used to explore the crystallinity, optical properties, morphology, and other features of the CuO-ZnO samples. Furthermore, catalytic performances were investigated for methylene blue (MB) degradation and 4-nitrophenol (4-NP) reduction. According to the results, CuO-ZnO NCs with 20 wt % CuO showed enhanced photocatalytic activity against MB dye with a 0.017 min(-1) rate constant compared to 0.0027 min(-1) for ZnO nanoparticles (NPs). Similarly, a ratio constant of 5.925 min(-1) g(-1) 4-NP reductions was achieved with CuO-ZnO NCs. The results signified enhanced performance of CuO-ZnO NCs relative to ZnO NPs. The enhancement could be due to the synergy between ZnO and CuO, resulting in improved absorption of visible light and reduced electron-hole (e(-)/h(+)) recombination rate. In addition, variations in the CuO content affected the performance of the CuO-ZnO NCs. Thus, the CuO-ZnO NCs prepared using V. sinaiticum Benth. extract could make the material a desirable catalyst for the elimination of organic pollutants.
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