Enhanced photocatalytic activity of Ag-coated ZnO nanorods for the degradation of methylene blue
Author:
Ahmad Riaz1, Haq Sami Ul1, Muhammad Sohail1, Khan Gulzar1, Shah Said Karim1, Hayat Khizar1, Khan Rashid1, Khan Tahirzeb1, Rehman Ateeq Ur2, Uzair Muhammad3, Khan Aurangzeb1, Khan Majid1ORCID
Affiliation:
1. Department of Physics , Abdul Wali Khan University Mardan , Mardan , 23200 , Pakistan 2. Department of Computer Science , Abdul Wali Khan University Mardan , Mardan , 23200 , Pakistan 3. Department of Physics , Univesity of Peshawar , Peshawar , 25120 , Pakistan
Abstract
Abstract
Worldwide water pollution is a serious issue, which needs special attention. Among these pollutants, methylene blue (MB) is dangerous for aquatic life as well as for human beings. Researchers are trying their best to degrade the various pollutants found in water. In the present work, we synthesized ZnO nanorods (NRDs) by one-step hydrothermal method. The synthesized samples were then characterized with the help of X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). ZnO nanostructures were composed of rod-shaped NRDs with flat edges and were highly crystalline with hexagonal shaped morphology. UV/Visible spectroscopy was carried out to investigate the optical properties, which shows the absorption in UV range and highly transmittance in the visible range. Finally, the photocatalytic activity was performed for the degradation of MB. The results show that MB was not fully degraded by bare ZnO NRDs. After all, we coated Ag NPs on the surfaces of ZnO NRDs through the simple solution-based method. The UV/Visible data reveal absorption in the UV as well as in the visible range due to the surface plasmonic effect of Ag NPs. Hybrid Ag-coated ZnO NRDs successfully degraded MB within 60 min. Therefore, we found that Ag-coated ZnO NRDs show good photocatalytic properties as compared to uncoated ZnO NRDs.
Funder
Higher Education Commission of Pakistan
Publisher
Walter de Gruyter GmbH
Subject
Physical and Theoretical Chemistry
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2 articles.
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