Enhanced the Catalytic activity of reduction of 4-nitrophenol on Ag/RGO nanocomposites | ||||
| Journal of Basic and Environmental Sciences | ||||
| Volume 5, Issue 2, April 2018, Page 101-114 PDF (823.34 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jbes.2024.370421 | ||||
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| Authors | ||||
| M. Khairy1; Mohamed Mokhtar Mohamed2; Ahmed Ibrahem3 | ||||
| 1aBenha University, Faculty of Science, Chemistry Departement, Benha, Egypt bChemistry Department, College of Science, Al-Imam Mohammad Ibn Saud lslamic University, Riyadh, KSA | ||||
| 2Benha University, Faculty of Science, Chemistry Departement, Benha, Egypt | ||||
| 3Duravit, Elmosheer Ahmed Ismail St., Sheraton Heliopolis, Piece No.9, Square 1160, Egypt | ||||
| Abstract | ||||
| A simple deposition method was used to synthesize Ag@Ag2O/RGO nanocomposites with different loads of Ag (0.4% and 4%) and at different annealing temperatures (250oC and 400oC). All samples were characterized with various techniques such as XRD, TEM-SAED, N2 sorptiometry, Raman, FTIR, UV-Vis diffuse reflectance and photoluminescence spectroscopy. The catalytic performances of the samples towards reduction of 4-nitrophenol (4-NP) were tested under dark conditions. The XRD and TEM results revealed the well dispersion of Ag and Ag2O moieties on RGO with crystallite size in the range of 17-34 nm. The nanocomposite Ag@Ag2O/RGO annealed at 400oC exhibited the highest reduction rate constant for 4-NP reduction (0.01 s-1), under the dark condition. The effect of presence of additives such as benzoquinone, triethanolamine, isopropyl alcohol and Na2CO3 on the reduction activity as well as its kinetics together with the reaction mechanism was well discussed. | ||||
| Keywords | ||||
| Ag2O@Ag/RGO; Effect of Ag content; Catalytic activity; 4-Nitrophenol reduction | ||||
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