Abstract
The current study emphases on formulating active hybrid bio-nanocomposite material based on biopolymer alginate embedded with TiO2 and silver nanoparticles. A fixed amount of TiO2 nanodispersion was mixed with alginate solution then the Alginate/TiO2 bio-nanocomposite beads obtained by ionic crosslinking using CaCl2 solution. The prepared Alginate/TiO2 beads in the wet state loaded with Ag+ ions by adsorption technique then the Alginate/TiO2 beads loaded with silver ions reduced to silver nanoparticles (Ag NPs) through irradiation technique. The bio-nanocomposite beads Alginate/TiO2 and Alginate/TiO2–Ag fully studied to assess the nanostructure morphology of embedded TiO2 and Ag nanoparticles: size and shape. The catalytic ability of the prepared nanocomposite beads as a catalyst inspected by studying its ability on the reduction of 2- Nitrophenol (2-NP) to 2-Aminophenol (2-AP) under various factors including initial concentration of 2-nitrophenol, time of reduction process, content of reducing agent and amount of catalyst. It is found that the embedding of Ag nanoparticles has a great impact where the catalytic hydrogenation of 2-NP to 2-AP reached to 98% in case of using Alginate/TiO2–Ag compared with 76% in case of applying hybrid Alginate/TiO2 bio-nanocomposite as a catalyst. Also, the prepared hybrid bio-nanocomposite beads has a high reduction ability for 2-nitrophenol up to 0.05 M concentration. The optimum weight of catalyst was 0.4 g which accomplished nearly 98% reduction percentage.
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The authors extend their appreciation to the Deputyship for research and innovation, Ministry of Education in Saudi Arabia for funding this research work through the Project Number (IF2/PSAU/2022/01/22988)
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Faten Abou El Fadl wrote the main manuscript text and Manal F. Abou Talib prepared figures. All authors reviewed the manuscript."
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Fadl, F.I.A.E., Taleb, M.F.A. Hybrid Alginate/TiO2/Ag Bio-nanocomposite Beads for Catalytic Hydrogenation of 2-Nitrophenol. J Inorg Organomet Polym 33, 2142–2153 (2023). https://doi.org/10.1007/s10904-023-02651-7
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DOI: https://doi.org/10.1007/s10904-023-02651-7