Photocatalytic reduction of carbon dioxide with H2O over ZnS-quantum dot inside SBA-15
| Autor: | Zhen-Yu Dong, 董朕宇 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 Technological development in industry has generated a great amount of carbon dioxide, which has caused greenhouse effect. In order to solve the CO2 problem, we reduced CO2 to methanol through photoexcitation of ZnS quantum dot, a semiconductor photocatalysts. In this research, we synthesized water-dispersible 1-thioglycerol (TG)-capped ZnS-quantum dots. After that the photocatalyst combining absorbent and ZnS-quantum dots as composite materials is in host-guest manner. To increase the production yield, the photocatalytic reaction wavelength was adjusted to visible-light The nucleation-doping strategy, ZnS-quantum dots were doped with transition metal, such as Mn2+, Fe2+, Co2+, Ni2+ in aqueous solution, as a result, we used a transition metal-Mn2+ and Co2+ doped zinc sulfide-quantum dots as catalytic catalyst. These photocatalysts were comprehensively characterized by using nitrogen physisorption, XRD, SAXS, UV–Vis spectroscopy and TEM. Finally, the CO2 reducing reaction was carried out in a photocatalytic reaction chamber with the evolved gas pump into aqueous solution and the quantitative analysis was performed by NMR. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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