Template‐Free Fabrication of Mesoporous Alumina Nanospheres Using Post‐Synthesis Water‐Ethanol Treatment of Monodispersed Aluminium Glycerate Nanospheres for Molybdenum Adsorption |
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| Authors: | Indra Saptiama Yusuf Valentino Kaneti Yoshitaka Suzuki Kunihiko Tsuchiya Nobuyoshi Fukumitsu Takeji Sakae Jeonghun Kim Yong‐Mook Kang Katsuhiko Ariga Yusuke Yamauchi |
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| Affiliation: | 1. International Center for Materials Nanoarchitectonics (WPI‐MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan;2. Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan;3. Center for Radioisotope and Radiopharmaceutical Technology, National Nuclear Energy Agency (BATAN), Serpong, South Tangerang, Indonesia;4. Japan Atomic Energy Agency (JAEA), Higashi‐Ibaraki, Ibaraki, Japan;5. Department of Radiation Oncology, University of Tsukuba, Tsukuba, Ibaraki, Japan;6. School of Chemical Engineering & Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland, Australia;7. Department of Energy and Materials Engineering, Dongguk University‐Seoul, Seoul, South Korea;8. Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan;9. Department of Plant and Environmental New Resources, Kyung Hee University, Yongin‐si, Gyeonggi‐do, South Korea |
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| Abstract: | This work reports the template‐free fabrication of mesoporous Al2O3 nanospheres with greatly enhanced textural characteristics through a newly developed post‐synthesis “water‐ethanol” treatment of aluminium glycerate nanospheres followed by high temperature calcination. The proposed “water‐ethanol” treatment is highly advantageous as the resulting mesoporous Al2O3 nanospheres exhibit 2–4 times higher surface area (up to 251 m2 g?1), narrower pore size distribution, and significantly lower crystallization temperature than those obtained without any post‐synthesis treatment. To demonstrate the generality of the proposed strategy, a nearly identical post‐synthesis “water treatment” method is successfully used to prepare mesoporous monometallic (e.g., manganese oxide (MnO2)) and bimetallic oxide (e.g., CuCo2O4 and MnCo2O4) nanospheres assembled of nanosheets or nanoplates with highly enhanced textural characteristics from the corresponding monometallic and bimetallic glycerate nanospheres, respectively. When evaluated as molybdenum (Mo) adsorbents for potential use in molybdenum‐99/technetium‐99m (99Mo/99mTc) generators, the treated mesoporous Al2O3 nanospheres display higher molybdenum adsorption performance than non‐treated Al2O3 nanospheres and commercial Al2O3, thereby suggesting the effectiveness of the proposed strategy for improving the functional performance of oxide materials. It is expected that the proposed method can be utilized to prepare other mesoporous metal oxides with enhanced textural characteristics and functional performance. |
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| Keywords: | alumina nanospheres mesoporous materials metal adsorption metal oxides template‐free synthesis |
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