ORCID Profile
0000-0002-1681-0193
Current Organisation
University of Tokyo
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Publisher: American Chemical Society (ACS)
Date: 22-03-2018
DOI: 10.1021/ACS.JPCLETT.8B00399
Abstract: The direct synthesis of hierarchically intergrown silicalite-1 can be achieved using a specific diquaternary ammonium agent. However, the location of these molecules in the zeolite framework, which is critical to understand the formation of the material, remains unclear. Where traditional characterization tools have previously failed, herein we use polarized stimulated Raman scattering (SRS) microscopy to resolve molecular organization inside few-micron-sized crystals. Through a combination of experiment and first-principles calculations, our investigation reveals the preferential location of the templating agent inside the linear pores of the MFI framework. Besides illustrating the attractiveness of SRS microscopy in the field of material science to study and spatially resolve local molecular distribution as well as orientation, these results can be exploited in the design of new templating agents for the preparation of hierarchical zeolites.
Publisher: American Chemical Society (ACS)
Date: 13-07-2011
DOI: 10.1021/CM201480X
Publisher: Elsevier BV
Date: 12-2018
Publisher: Elsevier
Date: 2017
Publisher: Springer Science and Business Media LLC
Date: 28-03-2020
DOI: 10.1007/S11625-020-00801-1
Abstract: Japan is faced with sustainability challenges such as resource security and depopulation. Well-coordinated, multifaceted actions including a shift from imported fossil to locally available renewable resources and empowering of rural areas are vital in tackling these challenges. Here, we present our co-learning approach to practice the multifaceted actions with a case study on Tanegashima, an isolated Japanese island. In these actions, thorough understanding of the feasible technologies, the locally available resources, and the socioeconomic aspects of the local community should be shared among the stakeholders to acquire the momentum for a change. In addition to the technoeconomic analysis, several other analyses were conducted to reveal the concerns of respective stakeholders, share the understandings on the possibilities of technology options, and their socioeconomic implications on local sustainability. Tools such as the life cycle assessment, input–output analysis, and choice experiments based on questionnaire surveys on the residents' preferences are used for the analyses. The stakeholders were provided with the results during a 5-year period, through more than 30 co-learning events, e.g., symposiums, seminars, and workshops. A total of ca. 1400 participants from residents, local industries, public organizations, and a high school joined these events. These opportunities gradually converted the concerns of the local stakeholders on their future regional energy systems into expectations and yielded constructive alternatives in technology implementation that can use the locally available resources. The changes in residents’ mind set through the co-learning processes induced by the contributions of the outsiders, providing professional insights acquired from the analyses and through the interactions with local stakeholders were examined in this study. This study demonstrates that the holistic incorporation of scientific technology assessments into co-learning can help coordinate the collaboration between researchers and local stakeholders toward regional transformation.
Publisher: American Chemical Society (ACS)
Date: 10-2006
DOI: 10.1021/JA065071Y
Abstract: Uniform-sized silica nanospheres with a well-ordered arrangement were successfully synthesized by a novel and simple method hydrolysis and condensation reactions of tetraethyl orthosilicate were conducted in the presence of basic amino acids.
Location: Japan
Location: United States of America
Location: No location found
No related grants have been discovered for Tatsuya Okubo.