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Biomolecule-Assisted Synthesis of Hierarchical Multilayered Boehmite and Alumina Nanosheets for Enhanced Molybdenum Adsorption |
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| Authors: | Indra Saptiama Dr. Yusuf Valentino Kaneti Prof. Brian Yuliarto Dr. Hiroaki Kumada Dr. Kunihiko Tsuchiya Dr. Yoshitaka Fujita Dr. Victor Malgras Dr. Nobuyoshi Fukumitsu Prof. Takeji Sakae Dr. Kentaro Hatano Prof. Katsuhiko Ariga Prof. Yoshiyuki Sugahara Prof. Yusuke Yamauchi |
| Affiliation: | 1. International Center for Materials Nanoarchitectonics (WPI-MANA), and International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044 Japan Faculty of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8576 Japan Center for Radioisotope and Radiopharmaceutical Technology, National Nuclear Energy Agency (BATAN), Puspiptek Area, Serpong, South Tangerang, Indonesia;2. International Center for Materials Nanoarchitectonics (WPI-MANA), and International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044 Japan;3. Engineering Physics Department and Research Centre for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Bandung, 40132 Indonesia;4. Faculty of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8576 Japan;5. Japan Atomic Energy Agency (JAEA), 4002 Narita, Oarai, Higashi-Ibaraki, Ibaraki, 311-1393 Japan;6. Department of Radiotherapy, Kobe Proton Center, 1-6-8, Minatoshima Minamimachi, Kobe, Hyogo, 650-0047 Japan;7. Department of Applied Chemistry and, Department of Nanoscience and Nanoengineering, Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo, 169-8555 Japan;8. School of Chemical Engineering and, Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland, 4072 Australia |
| Abstract: | The effective utilization of various biomolecules for creating a series of mesoporous boehmite (γ-AlOOH) and gamma-alumina (γ-Al2O3) nanosheets with unique hierarchical multilayered structures is demonstrated. The nature and concentration of the biomolecules strongly influence the degree of the crystallinity, the morphology, and the textural properties of the resulting γ-AlOOH and γ-Al2O3 nanosheets, allowing for easy tuning. The hierarchical γ-AlOOH and γ-Al2O3 multilayered nanosheets synthesized by using biomolecules exhibit enhanced crystallinity, improved particle separation, and well-defined multilayered structures compared to those obtained without biomolecules. More impressively, these γ-AlOOH and γ-Al2O3 nanosheets possess high surface areas up to 425 and 371 m2 g−1, respectively, due to their mesoporous nature and hierarchical multilayered structure. When employed for molybdenum adsorption toward medical radioisotope production, the hierarchical γ-Al2O3 multilayered nanosheets exhibit Mo adsorption capacities of 33.1–40.8 mg g−1. The Mo adsorption performance of these materials is influenced by the synergistic combination of the crystallinity, the surface area, and the pore volume. It is expected that the proposed biomolecule-assisted strategy may be expanded for the creation of other 3D mesoporous oxides in the future. |
| Keywords: | adsorption alumina mesoporous materials metal oxides nanostructures |