劉沂欣Liu, Yi-Hsin魏軒晧Wei, Xuan-Hao2023-12-089999-12-312023-12-082022https://etds.lib.ntnu.edu.tw/thesis/detail/42c5d1b41ae193d3694f8766b726b42a/http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/120889本研究利用具有高度結晶性的半導體單層奈米片CdSe(en)0.5作為觸媒及吸光材料，藉由硫化後產物進行光催化水分解產氫反應。比較硫化過程中硫前驅物的反應性（Na2S/Na2SO3, S8），及在不同氣氛下（氮氣、空氣）硫化程度對奈米片中孔洞生成、光催化水分解產氫效率之影響。同時結合本實驗室中孔洞硫化石墨烯－沸石複合奈米粒子（S-MGN），於硫化過程中與二維奈米片結合形成異質結構，藉此有效提升電荷分離效率及產氫結果 (124 umol h-1)。在研究鑑定上，我們利用各類結構定性及元素定量分析技術，包括穿透式電子顯微鏡、X光粉末繞射、螢光光譜、紫外光－可見光吸收光譜、元素分析、X光光電子能譜、電子自旋共振儀、電性分析等儀器鑑定，分析材料中元素鍵結及自由基特性，佐以氣相層析阻擋放電離子偵測器（GC-BID）探討硫化及碳材在光催化水分解所扮演的角色。In this study, the highly crystalline semiconductor monolayer nanosheets, CdSe(en)0.5, after sulfurization, was used as catalysts and photon absorbing materials for photocatalytic water splitting to produce hydrogen. The reactivity of sulfur precursors (Na2S/Na2SO3, S8) in the sulfurization process and the effect of sulfurization degree under different atmospheres (nitrogen, air) on the mesoporous formation were investigated toward the efficiency of photocatalytic water splitting for hydrogen production. Moreover, combined heterostructues of sulfided mesoporous graphene-oxide nanoparticles (S-MGN) and the nanosheets effectively improve charge separation efficiency and hydrogen production (124 umol h-1). Various qualitatively structural and quantitatively elemental analysis techniques, including transmission electron microscopy, X-ray powder diffraction, fluorescence spectroscopy, UV-visible absorption, elemental analysis, X-ray photoelectron spectroscopy, electron paramagnetic resonance and electrical measurement other instruments were used to identify chemical bonding and radical properties in heterostructures. The roles of sulfur and graphene materials were explored in photocatalytic water splitting evaluated by gas chromatography barrier discharge ion detector (GC-BID).硒化鎘中孔半導體單層奈米片光催化水分解產氫中孔洞碳材硫摻雜還原氧化石墨烯cadmium selenideMesoporous semiconductor monolayer nanosheetsPhotocatalytic water splittingMesoporous carbonsulfur-doped reduced graphene oxideetd