| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 102 === Carbon dioxide is one of the main contributors in the greenhouse gases that contributes to the problem of global warming. One of the solutions to such problem is converting this gas into useful products through photoreduction process. In this thesis, graphene oxide (GO), which has attracted a lot of scientist, is investigated as a potential CO2 photoreduction catalyst. We have used different thermal reduction level of graphene oxide and correlated these products with its corresponding CO2 photoreduction performance.
We have found out that as the reduction temperature increases, the less the functional groups are observed, resulting to a more hydrophobic nature of the reduced-GO (RGO). In addition, the reduction of functional groups also correlates to the red shift in light absorption and eventual quenching in the PL signal of RGOs. The effect of the hydrophobic nature and the reduction of band gap are obtained for the sample reduced at 150oC with yield of 0.31 μmole g-1 -cat hr-1. This is 1.7-fold higher than that of pristine GO (0.18μmole g-1 -cat hr-1).
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