Effect of gamma rays on the structural and optical properties of a new hybrid monolith silica sucrose xerogel |
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| Affiliation: | 1. Sciences, Laboratory of Advanced Materials and Interfaces, Monastir University, 5019, Tunisia;2. Research Lab: Energy and Matter, Development of Nuclear Sciences, National Center for Nuclear Sciences and Technology, 2020 Sidi-Thabet, Tunisia;3. ISTLS, Campus Erriadh, University of Sousse, Sousse 4029, Tunisia;4. Material Sciences Research Centre, Natural Resources and Recuperated Materials Valorization Laboratory, Technopole of Borj-Cédria, BP 273, 8020 Soliman, Tunisia;1. School of Materials Science and Engineering, University of Jinan, Jinan 250022, China;2. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China;1. INFLPR – National Institute for Laser, Plasma and Radiation Physics, Laser Department, Bvd. Atomistilor, Nr. 409, 077125 Măgurele (Ilfov), Bucharest, Romania;2. EaStCHEM Research School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST Fife, Scotland, United Kingdom;1. School of Materials Science and Engineering, University of Jinan, Jinan 250022, China;2. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China;1. Unité de recherche de Nanomatériaux et Environnement (UR15ES01), IPEIT, Université de Tunis, 2 Rue Jawaher Lel Nahru, 1089 Montfleury, Tunisia;2. Faculté des Sciences de Tunis, Université Tunis El Manar, 2092 El Manar, Tunis, Tunisia |
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| Abstract: | A new hybrid monolithic silica xerogel containing sucrose has been synthesized via the sol–gel method. The resulting sucrose silica xerogels were exposed to gamma radiation with a dose in the range of 10–100 kGy. The effect of gamma rays on the physical and structural properties of sucrose silica xerogels was investigated by Fourier transform infrared spectroscopy (FTIR) and UV visible spectroscopy. The results of FTIR spectroscopy show that the irradiation process causes changes in the network's structure by inducing defects. The UV visible spectra present three main band defects; E′ center, Non-Bridging Oxygen Hole center (NBOHC) and carbonyl radicals in irradiated sucrose silica xerogel samples. Additionally, the results show that the values of optical band gap energy depend on irradiation. Therefore, generated defects suggest that the behavior of sucrose silica xerogels was modified from an insulator (Eg=5.82 eV) to a semiconductor (Eg=3.16 eV) under gamma irradiation. |
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| Keywords: | γ-Irradiation Defect centers Hybrid sucrose xerogels Sol-gel Gap energy |
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