Fast Surface Charge Transfer with Reduced Band Gap Energy of FeVO4/Graphene Nanocomposite and Study of Its Electrochemical Property and Enhanced Photocatalytic Activity
| Autor: | Zhengjun Zhang, Zajif Hussain, Yasir Javed, Naveed Akthar Shad, Z. Imran, Sadaf Bashir Khan, Nasir Amin, Safia Hassan, Muhammad Munir Sajid |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Arabian Journal for Science and Engineering. 44:6659-6667 |
| ISSN: | 2191-4281 2193-567X |
| Popis: | Photocatalysis comprises an immense interest for resolving current energy and environmental problems by converting sun light into chemical energy. Here, we developed FeVO4/graphene nanocomposites by using a facile hydrothermal method and characterized the product through powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectrometry, UV–visible spectroscopic analysis, Brunauer–Emmett–Teller, photoluminescence spectroscopy and electrochemical impedance spectroscopy. The visible light-assisted photocatalytic activeness was determined by decomposition of methylene blue (MB) dye solution. The outcomes show that the FeVO4/graphene nanocomposites exhibit enhanced photocatalytic efficiency for the oxidization of MB on a maximum degradation removal rate of decolonization 92% while compared with pure FeVO4 nanocomposite (63%). This is attributed to enhanced light absorption capacity, long lifetime of photo-generated charge carriers in FeVO4/graphene nanocomposite and the greater surface area which allow greater extent of adsorption of dye molecules at the catalyst surface. The possible photocatalytic degradation mechanism of FeVO4 and FeVO4/graphene was proposed and critically discussed. |
| Databáze: | OpenAIRE |
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