工學院: 環境工程學研究所指導教授: 駱尚廉曲盟超Qu, Meng-ChaoMeng-ChaoQu2017-03-062018-06-282017-03-062018-06-282015http://ntur.lib.ntu.edu.tw//handle/246246/277166本研究選取鱗片石墨作為光催化複合半導體材料的部份原料，應用Hummers改良法合成以石墨烯為基礎的多種具有較高關注度的含碳材料，後經過不同步驟的還原反應，與主要選取的硫化鎘及氧化鎢光催化劑進行披覆，合成多種用於產氫的光催化材料。 製成的半導體材料通過FTIR、XRD、SEM、EDS、UV-Vis等儀器對複合半導體進行表面分析，確認所製成材料的性質從而探討影響其光催化效率的原因。并探討最佳觸媒投加量；Gr/CdS複合材料中Gr的最佳重量比；N-Gr/CdS、Gr/CdS兩種不同石墨改質材料光催化效果的比較及分析；Gr/CdS與WO3分別投加及Gr/CdS/WO3合成材料直接用於光催化反應效果的影響；光催化反應及其對應反應機制的探討，以及三種不同犧牲劑對反應產量的影響。 結果表明，通過物化分析，Graphite oxide、N-graphene、Graphene以及其他光觸媒複合材料都被成功的合成，且有較理想的晶體形態及催化效果。實驗結果證明N-graphene/CdS並未表現出預計的催化效果。而Gr/CdS相比之有更好的光催化產氫率。在0.4 g光觸媒投加劑量下，以Na2S/Na2SO3做為犧牲劑，4 wt%Gr/CdS/WO3複合材料在可見光照射下可達到最佳催化效果，產氫在5小時後量達611μmol·h-1。 本研究結果可作為對光催化領域進一步研究的參考，石墨烯複合的光催化材料具有較理想的研究潛力。在此研究基礎上，可進一步探討材料合成的改進條件及其對產氫可能產生的理論影響。We utilized crystalline flake graphite as one of the raw material to synthesize the graphene based semiconductor of photo-catalysts which are extensively concerned. In this research, the modified Hummers method was used to synthesize graphene, whereafter, CdS and WO3 powders were added into the material to compose the compound photo-catalysts for hydrogen production. We further used instrument analysis such as FTIR, XRD, SEM/EDS and UV-Vis to confirm the crystal structure and the potential capability of photo-catalysis. The analysis includes, the optimal dosage and mixed ratio between different substances of compound semiconductor, the effect of doping Gr or N-Gr onto, the impact of WO3 in ternary hybrid and the different effects between three types of sacrificial reagents. The results showed that all the materials including Graphite oxide、N-graphene、Graphene were successfully synthesized and the ideal crystal structure can promote the photo-catalysis effectively. In the contrary, N-graphene/CdS had negative effect comparing with expectation, but not the Gr/CdS. The Gr/CdS can perform the best efficiency and achieve the hydrogen productivity of 611μmol·h-1 after 5 hours reaction under the condition of using Na2S/Na2SO3 as sacrificial reagent with dosage of 0.4 grams. This research testified the promising application of graphene based compound photo-catalysts that may be served as role materials in water splitting. However, further more details can be discussed in future researches to purify the compositions.論文使用權限: 不同意授權半導體光催化石墨烯複合材料製氫semiconductorphotocatalysisgraphenehydrogen production[SDGs]SDG7thesis