2011-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/676794摘要：太陽能是地球生物的終極能源，植物光合作用從古到今提供或儲存人類絕大多數使用的化石能源，光合作用的機制顯示，植物將CO2轉化葡萄糖是經過兩階段，光反應先分解水後釋放出O2，產生的氫再進行Calvin暗反應去還原CO2。因此本計畫目標也以兩階段方式，光催化還原CO2成碳氫化合物燃料，先以光催化水分解分離O2產生H2，再光催氫化CO2還原成碳氫化合物燃料，預計可以大幅提升光量子效率。本實驗室已執行以光觸媒進行光催化還原CO2生產碳氫化合物數年，近三年也開始光催化水分解反應，可在分解水的同時分開H2與O2。本計畫將模仿光合作用，進行光催化水分解-CO2還原成碳氫化合物燃料，研發高效率的雙功能光觸媒和光反應系統，開發太陽能直接轉成化學能的方法。第一年是水分解薄膜法分離氫和氧+光催化氫化CO2，雙胞反應器使用離子交換膜將H2/O2分離，組合最佳水分解及光催化氫化CO2觸媒，尋求最適化條件。預期兩階段方式可類比甚至超過光合作用的光量子效率，比其他再生生質能源較具有經濟競爭力，貢獻於永續的再生能源發展。<br> Abstract: Solar energy is the ultimate energy source for all life in earth. The photosynthesis of plant provides most of the human energy now and stored energy as fossil fuel long time ago. The mechanism of photosynthesis indicates that the conversion of CO2 into glucose is by two steps. That is, O2 is released from water splitting in the light-reaction, and then the generated hydrogen is to hydrogenate CO2 in the Calvin cycle (dark-reaction). Thus the objective is to develop a two-step photocatalytic process to reduce CO2 into hydrocarbon fuel. H2 is produced and O2 is separated by photocatalytic water splitting, then CO2 is hydrogenated into fuel. The quantum efficiency is expected to increase significantly. Our lab has carried out the photocatalytic CO2 reduction into hydrocarbon fuel for many years. Recently we also perform the photocatalytic water splitting into H2 and O2. The H2 and O2 can be simultaneously separated during the water splitting reaction. This proposal imitates the photosynthesis to develop a two-step process of photocatalytic water splitting following CO2 hydrogenation into hydrocarbons. We will synthesize high-efficiency dual-function photocatalysts and design a photo reactor system. Thus the solar energy can be directly converted into chemical energy. In year one, we will perform photocatalytic H2O splitting and CO2 hydrogenation by membrane separation method. A twin reactor with ion-exchanged membrane can separate H2/O2 during photoreactions. We will search the optimum conditions to combine water splitting and CO2 hydrogenation. The result is expected to be comparable or even exceed the photosynthesis in term of quantum efficiency. This two-step process will be economically competitive to other biomass methods. Such technique is a great contribution in sustainable energy.光催化水分解光催化還原CO2人工光合作用再生能源photocatalytic water splittingphotocatalytic CO2 reductionartificial photosynthesisrenewable energy