Fabrication of Capsule Reactor Type Artificial Photosynthesis System for the Direct Formation of Methanol from CO2

2015 Fiscal Year Final Research Report

• Project/Area Number: 24310052
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Environmental technology/Environmental materials
• Research Institution: Utsunomiya University
• Principal Investigator: SUZUKI Noboru 宇都宮大学, 工学(系)研究科(研究院), 教授 (40134259)
• Co-Investigator(Renkei-kenkyūsha): SATO Masahide 宇都宮大学, 大学院工学研究科, 准教授 (10261504) ; FURUSAWA Takeshi 宇都宮大学, 大学院工学研究科, 助教 (50375523)
• Research Collaborator: KURAYAMA Fumio
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 人工光合成 / マイクロカプセル / 酵素 / 光触媒 / 電子伝達物質 / 二酸化炭素 / メタノール

Outline of Final Research Achievements

Photochemical enzymatic synthesis has received considerable attention for artificial photosynthesis. In this work, the preparation of novel photoactive organic-inorganic hybrid microcapsules with photosensitizer and enzyme for visible-light driven photoenzymatic synthesis was studied. In this system, light energy converts to chemical energy though a visible-light induced electron-transfer (ET) from excited zinc tetraphenyl-porphyrin (ZnTPP) located in an capsule shell to a redox enzyme inside the capsule with the assistance of methyl viologen (MV) as an electron mediator. Consequently, higher encapsulation yield of enzyme was achieved by alginate and 3-(2-aminoethylamino)propyltrimethoxysilane based capsules, and the formate was formed from carbon dioxide. Also, using kappa-carrageenan and 3-aminopropyltriethoxysilane based capsules followed by the crosslinking with glutaraldehyde had the reusability and the experimental results suggested the formation of a small amount of methanol.

Free Research Field

工業物理化学